Title: Cheap Flights from Colorado Springs (COS) to Ontario (ONT) - Expedia.ca ![Ontario showing night scenes and street scenes](https://images.trvl-media.com/place/2680/6f6cbfd1-6188-4a75-9ba7-05d8edf0fb1d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) Photo by Ontario Convention & Visitors Bureau / Jon Edwards. ![](https://images.trvl-media.com/place/2680/6f6cbfd1-6188-4a75-9ba7-05d8edf0fb1d.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # Cheap Flights from Colorado Springs (COS) to Ontario (ONT) - [Roundtrip](?flightType=roundtrip) - [One-way](?flightType=oneway) - [Multi-city](?flightType=multicity) ### Travellers Adults ChildrenAges 2 to 17 InfantsYounger than 2 EconomyPremium economyBusiness classFirst class Leaving from Going to Departing Returning Add a place to stay Add a car Direct flights only ## Popular airlines from Colorado Springs Municipal Airport (COS) to Los Angeles - Ontario Intl. Airport (ONT) - ![Delta](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_DL.svg) Delta [](https://www.expedia.ca/Flights-Search?leg1=from:COS,to:ONT,departure:20/12/2025TANYT&leg2=from:ONT,to:COS,departure:27/12/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![Southwest Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_WN.svg) Southwest Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:COS,to:ONT,departure:20/12/2025TANYT&leg2=from:ONT,to:COS,departure:27/12/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![American Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AA.svg) American Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:COS,to:ONT,departure:20/12/2025TANYT&leg2=from:ONT,to:COS,departure:27/12/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![United](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_UA.svg) United [](https://www.expedia.ca/Flights-Search?leg1=from:COS,to:ONT,departure:20/12/2025TANYT&leg2=from:ONT,to:COS,departure:27/12/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![notification illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__notification.svg) ### Be in the know Get alerts if flight prices drop or rise\* - ![deals illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__deals.svg) ### Book smarter Save up to 30% on select hotels after you book a flight\* - ![trophy illustration](https://a.travel-assets.com/travel-assets-manager/pictogram-bex/light__trophy.svg) ### Earn twice Earn your airline miles on top of our rewards [Sign in](https://www.expedia.ca/login) ## Cheap flights from Colorado Springs (COS) to Ontario (ONT) Prices were available within the past 7 days and start at for one-way flights and CA $373 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Mon, Jan 26 - Sat, Feb 14 COS Colorado Springs ONT Ontario CA $373 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:26/01/2026TANYT&leg2=from:ONT,to:COS,departure:14/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:372.30&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEij0voMDMOm_gwM4RUAAWAEKIQjEmAESBDEyMjQY8hIgrpsBKMHAgwMwr8GDAzhFQAFYAQpGCiEIxJgBEgQyNzA4GK6bASDyEiiokoUDMJGThQM4RUAAWAEKIQjEmAESBDQ0NDkY8hIgwpMBKL-ThQMwp5SFAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Fri, Jan 30 - Sat, Feb 14 COS Colorado Springs ONT Ontario CA $389 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:30/01/2026TANYT&leg2=from:ONT,to:COS,departure:14/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:388.40&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEij064MDMOnsgwM4RUAAWAEKIQjEmAESBDEyMjQY8hIgrpsBKMHtgwMwr-6DAzhFQAFYAQpGCiEIxJgBEgQyNzA4GK6bASDyEiiokoUDMJGThQM4RUAAWAEKIQjEmAESBDQ0NDkY8hIgwpMBKL-ThQMwp5SFAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sun, Feb 1 - Sat, Feb 14 COS Colorado Springs ONT Ontario CA $459 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:01/02/2026TANYT&leg2=from:ONT,to:COS,departure:14/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:458.30&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEii3goQDMKyDhAM4RUAAWAEKIQjEmAESBDEyMjQY8hIgrpsBKIGEhAMw74SEAzhFQAFYAQpGCiEIxJgBEgQyNzA4GK6bASDyEiiokoUDMJGThQM4RUAAWAEKIQjEmAESBDQ0NDkY8hIgwpMBKL-ThQMwp5SFAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sun, Dec 28 - Tue, Jan 6 COS Colorado Springs ONT Ontario CA $460 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:28/12/2025TANYT&leg2=from:ONT,to:COS,departure:06/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:459.40&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEii7-4ADMLL8gAM4RUAAWAEKIQjEmAESBDE3MTkY8hIgrpsBKOP9gAMw2v6AAzhFQAFYAQpGCiEIxJgBEgQxMjI0GK6bASDyEijj4IEDMNDhgQM4RUAAWAEKIQjEmAESBDM3ODgY8hIgwpMBKIHigQMw4-KBAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Tue, Jan 6 - Thu, Jan 22 COS Colorado Springs ONT Ontario CA $469 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:06/01/2026TANYT&leg2=from:ONT,to:COS,departure:22/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:469.00&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEij03YEDMOnegQM4RUAAWAEKIQjEmAESBDEyMjQY8hIgrpsBKL3fgQMwrOCBAzhFQAFYAQpGCiEIxJgBEgQxMjI0GK6bASDyEijmlIMDMNSVgwM4RUAAWAEKIQjEmAESBDM3ODgY8hIgwpMBKIGWgwMw45aDAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Mon, Dec 29 - Sat, Jan 17 COS Colorado Springs ONT Ontario CA $472 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:29/12/2025TANYT&leg2=from:ONT,to:COS,departure:17/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:471.20&airProductToken=AQpFCiEI1YIBEgQ1NTM2GMKTASCDaSiYgoEDMOKCgQM4TEAAWAEKIAjVggESAzQzMBiDaSCumwEox4OBAzDWhIEDOExAAVgBCkYKIQjVggESBDI0NDYYrpsBIINpKPHWggMw_NeCAzhLQABYAQohCNWCARIENTczOBiDaSDCkwEo0tiCAzCV2YIDOEtAAVgBEgoIARABGAEqAlVBGAEiBAgBEAEoBDAB) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Fri, Jan 2 - Thu, Jan 15 COS Colorado Springs ONT Ontario CA $486 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:02/01/2026TANYT&leg2=from:ONT,to:COS,departure:15/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:485.20&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEijbs4EDMNK0gQM4RUAAWAEKIQjEmAESBDE3MTkY8hIgrpsBKIO2gQMw-raBAzhFQAFYAQpGCiEIxJgBEgQxMjI0GK6bASDyEiiDxoIDMPDGggM4RUAAWAEKIQjEmAESBDM3ODgY8hIgwpMBKKHHggMwg8iCAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sun, Dec 28 - Thu, Jan 15 COS Colorado Springs ONT Ontario CA $496 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:28/12/2025TANYT&leg2=from:ONT,to:COS,departure:15/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:495.90&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEii7-4ADMLL8gAM4RUAAWAEKIQjEmAESBDE3MTkY8hIgrpsBKOP9gAMw2v6AAzhFQAFYAQpGCiEIxJgBEgQxMjI0GK6bASDyEiiDxoIDMPDGggM4RUAAWAEKIQjEmAESBDM3ODgY8hIgwpMBKKHHggMwg8iCAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Fri, Jan 2 - Fri, Jan 16 COS Colorado Springs ONT Ontario CA $501 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:02/01/2026TANYT&leg2=from:ONT,to:COS,departure:16/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:500.20&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEijbs4EDMNK0gQM4RUAAWAEKIQjEmAESBDE3MTkY8hIgrpsBKIO2gQMw-raBAzhFQAFYAQpGCiEIxJgBEgQyNzA4GK6bASDyEiiIzIIDMPnMggM4RUAAWAEKIQjEmAESBDQ0NDkY8hIgwpMBKJ_NggMwic6CAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sat, Jan 3 - Sat, Jan 17 COS Colorado Springs ONT Ontario CA $529 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:03/01/2026TANYT&leg2=from:ONT,to:COS,departure:17/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:528.20&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEij7voEDMPK_gQM4RUAAWAEKIQjEmAESBDE3MTkY8hIgrpsBKM7AgQMwxMGBAzhFQAFYAQpGCiEIxJgBEgQyNzA4GK6bASDyEiio14IDMJnYggM4RUAAWAEKIQjEmAESBDQ0NDkY8hIgwpMBKL_YggMwqdmCAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Mon, Dec 29 - Sat, Jan 17 COS Colorado Springs ONT Ontario CA $550 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:29/12/2025TANYT&leg2=from:ONT,to:COS,departure:17/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:549.70&airProductToken=AQpFCiEI1YIBEgQ0NzE5GMKTASCDaSiqhoEDMOuGgQM4U0AAWAEKIAjVggESAzQyNRiDaSCumwEow4eBAzDTiIEDOFNAAVgBCkYKIQjVggESBDI0NDYYrpsBIINpKPHWggMw_NeCAzhLQABYAQohCNWCARIENTczOBiDaSDCkwEo0tiCAzCV2YIDOEtAAVgBEgoIARABGAEqAlVBGAEiBAgBEAEoBDAB) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sun, Dec 28 - Mon, Jan 5 COS Colorado Springs ONT Ontario CA $557 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:28/12/2025TANYT&leg2=from:ONT,to:COS,departure:05/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:556.10&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEii7-4ADMLL8gAM4RUAAWAEKIQjEmAESBDE3MTkY8hIgrpsBKOP9gAMw2v6AAzhFQAFYAQpGCiEIxJgBEgQyNzA4GK6bASDyEiio0IEDMJnRgQM4RUAAWAEKIQjEmAESBDQ0NDkY8hIgwpMBKL_RgQMwqdKBAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sun, Dec 28 - Sun, Jan 11 COS Colorado Springs ONT Ontario CA $593 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:28/12/2025TANYT&leg2=from:ONT,to:COS,departure:11/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:592.70&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEii7-4ADMLL8gAM4RUAAWAEKIQjEmAESBDE3MTkY8hIgrpsBKOP9gAMw2v6AAzhFQAFYAQpGCiEIxJgBEgQxMjI0GK6bASDyEiiDmYIDMPCZggM4RUAAWAEKIQjEmAESBDM3ODgY8hIgwpMBKKGaggMwg5uCAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sat, Dec 13 - Fri, Dec 26 COS Colorado Springs ONT Ontario CA $620 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:13/12/2025TANYT&leg2=from:ONT,to:COS,departure:26/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:619.50&airProductToken=AQpGCiEIxJgBEgQzNzAwGMKTASDyEijc0v8CMNPT_wI4RUAAWAEKIQjEmAESBDE2MTQY8hIgrpsBKI_U_wIwg9X_AjhFQAFYAQpFCiAIxJgBEgM2MzQYrpsBIPISKIblgAMw8uWAAzhFQABYAQohCMSYARIEMzc4OBjyEiDCkwEonOaAAzCF54ADOEVAAVgBEgoIARABGAEqAkRMGAEiBAgBEAEoBDAB) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Mon, Dec 29 - Thu, Jan 1 COS Colorado Springs ONT Ontario CA $621 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:29/12/2025TANYT&leg2=from:ONT,to:COS,departure:01/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:620.60&airProductToken=AQpFCiEI1YIBEgQ0NzE5GMKTASCDaSiqhoEDMOuGgQM4U0AAWAEKIAjVggESAzQyNRiDaSCumwEow4eBAzDTiIEDOFNAAVgBCkYKIQjVggESBDI0NDYYrpsBIINpKPGigQMw_KOBAzhMQABYAQohCNWCARIENTMwNhiDaSDCkwEo0qSBAzCQpYEDOExAAVgBEgoIARABGAEqAlVBGAEiBAgBEAEoBDAB) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sat, Dec 13 - Sun, Dec 21 COS Colorado Springs ONT Ontario CA $648 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:13/12/2025TANYT&leg2=from:ONT,to:COS,departure:21/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:647.50&airProductToken=AQpGCiEIxJgBEgQzNzAwGMKTASDyEijc0v8CMNPT_wI4RUAAWAEKIQjEmAESBDE2MTQY8hIgrpsBKI_U_wIwg9X_AjhFQAFYAQpFCiAIxJgBEgM2MzQYrpsBIPISKOasgAMw0q2AAzhFQABYAQohCMSYARIEMzc4OBjyEiDCkwEo_K2AAzDlroADOEVAAVgBEgoIARABGAEqAkRMGAEiBAgBEAEoBDAB) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Fri, Dec 26 - Thu, Jan 1 COS Colorado Springs ONT Ontario CA $657 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:26/12/2025TANYT&leg2=from:ONT,to:COS,departure:01/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:656.10&airProductToken=AQpFCiEI1YIBEgQ0NzE5GMKTASCDaSjK5IADMIvlgAM4V0AAWAEKIAjVggESAzQyNRiDaSCumwEo4-WAAzDz5oADOFdAAVgBCkYKIQjVggESBDI0NDYYrpsBIINpKPGigQMw_KOBAzhMQABYAQohCNWCARIENTMwNhiDaSDCkwEo0qSBAzCQpYEDOExAAVgBEgoIARABGAEqAlVBGAEiBAgBEAEoBDAB) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Fri, Dec 12 - Mon, Dec 22 COS Colorado Springs ONT Ontario CA $667 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:12/12/2025TANYT&leg2=from:ONT,to:COS,departure:22/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:666.80&airProductToken=AQpGCiEI1YIBEgQ0NjU3GMKTASCDaSjxxv8CMLXH_wI4U0AAWAEKIQjVggESBDIwMjgYg2kgrpsBKIzI_wIwmsn_AjhTQAFYAQpGCiEI1YIBEgQyNDQ2GK6bASCDaSixsoADMLyzgAM4TEAAWAEKIQjVggESBDQ3MzQYg2kgwpMBKOe0gAMwoLWAAzhMQAFYARIKCAEQARgBKgJVQRgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sun, Dec 28 - Sat, Jan 3 COS Colorado Springs ONT Ontario CA $706 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:28/12/2025TANYT&leg2=from:ONT,to:COS,departure:03/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:705.50&airProductToken=AQpGCiEIxJgBEgQ0NDQ5GMKTASDyEii7-4ADMLL8gAM4RUAAWAEKIQjEmAESBDE3MTkY8hIgrpsBKOP9gAMw2v6AAzhFQAFYAQpGCiEIxJgBEgQyNzA4GK6bASDyEijouYEDMNe6gQM4RUAAWAEKIQjEmAESBDM3ODgY8hIgwpMBKJzAgQMwhcGBAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Mon, Dec 29 - Sat, Jan 3 COS Colorado Springs ONT Ontario CA $725 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:COS,to:ONT,departure:29/12/2025TANYT&leg2=from:ONT,to:COS,departure:03/01/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:724.90&airProductToken=AQpFCiEI1YIBEgQ0NzE5GMKTASCDaSiqhoEDMOuGgQM4U0AAWAEKIAjVggESAzQyNRiDaSCumwEow4eBAzDTiIEDOFNAAVgBCkYKIQjVggESBDI0NDYYrpsBIINpKLG5gQMwvLqBAzhTQABYAQohCNWCARIENTMwNhiDaSDCkwEokruBAzDQu4EDOFNAAVgBEgoIARABGAEqAlVBGAEiBAgBEAEoBDAB) ## Find the cheapest month to fly from Colorado Springs (COS) to Ontario (ONT) ### August is typically the cheapest month to fly From CA $237 - CA $814 per traveller. ## Alternative airports near Ontario Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.ca/Flights-Search?leg1=from:COS,to:ONT,departure:20/12/2025TANYT&leg2=from:ONT,to:COS,departure:01/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ONT Los Angeles - Ontario Intl. CheapestClosest 8 min [Flights from CA $621 ](https://www.expedia.ca/Flights-Search?leg1=from:COS,to:ONT,departure:20/12/2025TANYT&leg2=from:ONT,to:COS,departure:01/01/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) __Flight from Colorado Springs to Ontario (COS - ONT) route information__ | Origin airport | Colorado Springs | | ------------------- | --------------------------- | | Destination airport | Los Angeles - Ontario Intl. | | Roundtrip price | CA $372 | | Distance | 1258 km | ## Colorado Springs to Los Angeles Flights **The easy way to book your flights from Colorado Springs to Ontario** With Expedia, it’s simple to find and book flights to Ontario from Colorado Springs whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Los Angeles - Ontario Intl., too. Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Colorado Springs to Ontario today, tomorrow, or this week. **Save dollars with cheap flights from Colorado Springs, COS to Los Angeles - Ontario Intl., ONT** Sort your search results by price to find great deals on your flight from Colorado Springs to Ontario—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Ontario from Colorado Springs currently is just CA $373 rising to CA $725\. Here are more money-saving tips: - Fly in January when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to Ontario - Avoid peak season and weekends when flights can cost more - Early morning and late-night flights are sometimes cheaper, so try varying your travel times - One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! **Reasons to choose Expedia for your flight to Ontario from Colorado Springs** Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Ontario with Expedia today. ## Frequently asked questions ### How much is a flight from COS to ONT? ### Do I need to pay a cancellation fee if I cancel my flight from COS to Los Angeles - Ontario Intl. Airport (ONT)? ### How do I find cheap flights from City of Colorado Springs Municipal Airport to ONT that have flexible change policies? ### How many hours is the flight from City of Colorado Springs Municipal Airport to Los Angeles - Ontario Intl. Airport (ONT)? ### How far is the flight from City of Colorado Springs Municipal Airport to Ontario Airport? ### Which airlines fly direct from Colorado Springs Airport (COS) to ONT? ### Are COS to ONT flight tickets cheaper when they're purchased at the last minute? ## Explore a world of travel with Expedia - Flights ### Flights - [Flights from Bamfield to Ontario ](https://www.expedia.ca/lp/flights/10552/2680/bamfield-to-ontario) - [Flights from Revelstoke to Ontario ](https://www.expedia.ca/lp/flights/10607/2680/revelstoke-to-ontario) - [Flights from Dutch Harbor to Ontario ](https://www.expedia.ca/lp/flights/1075/2680/dutch-harbor-to-ontario) - [Flights from Devils Lake to Ontario ](https://www.expedia.ca/lp/flights/1076/2680/devils-lake-to-ontario) - [Flights from Heraklion to Ontario ](https://www.expedia.ca/lp/flights/1444/2680/heraklion-to-ontario) - [Flights from Harbin to Ontario ](https://www.expedia.ca/lp/flights/1510/2680/harbin-to-ontario) - [Flights from Jamestown to Ontario ](https://www.expedia.ca/lp/flights/1709/2680/jamestown-to-ontario) - 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[Flights from Ogden to Ontario ](https://www.expedia.ca/lp/flights/9180/2680/ogden-to-ontario) - [Flights from Okushiri to Ontario ](https://www.expedia.ca/lp/flights/9189/2680/okushiri-to-ontario) - [Flights from Cusco to Ontario ](https://www.expedia.ca/lp/flights/941/2680/cusco-to-ontario) - [Flights from Scottsdale to Ontario ](https://www.expedia.ca/lp/flights/9829/2680/scottsdale-to-ontario) - [Flights from Toronto (YYZ) to Los Angeles (LAX) ](https://www.expedia.ca/lp/flights/yyz/lax/toronto-to-los-angeles) \*Available to Expedia members.