Title: CA $107 Cheap Flights from St. Louis (STL) to Chicago (CHI) - Expedia.ca ![City of Chicago. Image of Chicago downtown and Chicago River with bridges at sunny summer day](https://images.trvl-media.com/place/178248/e6aa83ce-7ad8-43a5-9d1d-b055eefa7e78.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ## Popular airlines from Lambert-St. Louis International Airport (STL) to Chicago - ![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:STL,to:CHI,departure:29/01/2026TANYT&leg2=from:CHI,to:STL,departure:05/02/2026TANYT&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:STL,to:CHI,departure:29/01/2026TANYT&leg2=from:CHI,to:STL,departure:05/02/2026TANYT&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:STL,to:CHI,departure:29/01/2026TANYT&leg2=from:CHI,to:STL,departure:05/02/2026TANYT&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:STL,to:CHI,departure:29/01/2026TANYT&leg2=from:CHI,to:STL,departure:05/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![Frontier Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_F9.svg) Frontier Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:STL,to:CHI,departure:29/01/2026TANYT&leg2=from:CHI,to:STL,departure:05/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) - ![Alaska Airlines](https://forever.travel-assets.com/flex/flexmanager/images/2024/09/23/landing_airline_sq_logo_AS.svg) Alaska Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:STL,to:CHI,departure:29/01/2026TANYT&leg2=from:CHI,to:STL,departure:05/02/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![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 St. Louis (STL) to Chicago (CHI) Prices were available within the past 7 days and start at CA $107 for one-way flights and CA $225 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Wed, Mar 18 - Sat, Mar 28 STL St. Louis ORD Chicago CA $225 Roundtrip found 16 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:ORD,departure:18/03/2026TANYT&leg2=from:ORD,to:STL,departure:28/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:224.50&airProductToken=AQozCjEIwYIBEgQxMjIzGPJcIK4cKPT4hwMwzPmHAzhCQABYAWoFQkFTSUNyCE9WQUlLU0JYCjMKMQjBggESBDM1NzMYrhwg8lwo7u-IAzDD8IgDOEJAAFgBagVCQVNJQ3IIT1ZBSVhTQlgSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, Mar 18 - Sat, Mar 28 STL St. Louis ORD Chicago CA $241 Roundtrip found 16 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:ORD,departure:18/03/2026TANYT&leg2=from:ORD,to:STL,departure:28/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:240.80&airProductToken=AQpuCjUIxJgBEgQzODg0GPJcIMx8KPj7hwMw4PyHAzhFQABYAWoJTUFJTkJBU0lDcghWQVZTQzJCQwo1CMSYARIEMTMwNhjMfCCuHCjk_YcDMMT-hwM4RUABWAFqCU1BSU5CQVNJQ3IIVkFWU0MyQkMSCggBEAEYASoCREwYASIECAEQASgCKAMoBDAB) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Tue, Feb 10 - Tue, Feb 17 STL St. Louis ORD Chicago CA $247 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:ORD,departure:10/02/2026TANYT&leg2=from:ORD,to:STL,departure:17/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:246.70&airProductToken=AQoiCiAI1YIBEgQ0MTgzGPJcIK4cKK3lhAMwjOaEAzhLQABYAQoiCiAI1YIBEgQyMDA1GK4cIPJcKMS5hQMwmbqFAzhLQABYARIKCAEQARgBKgJVQRgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Thu, Feb 12 - Tue, Feb 17 STL St. Louis ORD Chicago CA $248 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:ORD,departure:12/02/2026TANYT&leg2=from:ORD,to:STL,departure:17/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:247.70&airProductToken=AQoiCiAI1YIBEgQ0NDIzGPJcIK4cKI77hAMw6_uEAzhLQABYAQoiCiAI1YIBEgQyMDA1GK4cIPJcKMS5hQMwmbqFAzhLQABYARIKCAEQARgBKgJVQRgBIgQIARABKAQwAQ) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Thu, Feb 12 - Thu, Feb 19 STL St. Louis ORD Chicago CA $250 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:ORD,departure:12/02/2026TANYT&leg2=from:ORD,to:STL,departure:19/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:249.90&airProductToken=AQoiCiAI1YIBEgQ0NDIzGPJcIK4cKI77hAMw6_uEAzhLQABYAQoiCiAI1YIBEgQyMDA1GK4cIPJcKITQhQMw2dCFAzhLQABYARIKCAEQARgBKgJVQRgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, Mar 18 - Sat, Mar 28 STL St. Louis ORD Chicago CA $252 Roundtrip found 16 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:ORD,departure:18/03/2026TANYT&leg2=from:ORD,to:STL,departure:28/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:251.70&airProductToken=AQpwCjYIxJgBEgQzODYzGPJcIOO0ASiW-4cDMO_7hwM4RUAAWAFqCU1BSU5CQVNJQ3IIVkFWU0MyQkMKNgjEmAESBDIzNTgY47QBIK4cKJ_9hwMw9_2HAzhFQAFYAWoJTUFJTkJBU0lDcghWQVZTQzJCQwpwCjYIxJgBEgQzOTQ2GK4cIOO0ASia64gDMOnriAM4RUAAWAFqCU1BSU5CQVNJQ3IIVkFWU0E1QkMKNgjEmAESBDQ4MjIY47QBIPJcKNDtiAMwtO6IAzhFQAFYAWoJTUFJTkJBU0lDcghWQVZTQTVCQxIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, Mar 18 - Sat, Mar 28 STL St. Louis MDW Chicago CA $252 Roundtrip found 16 hours ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:MDW,departure:18/03/2026TANYT&leg2=from:MDW,to:STL,departure:28/03/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:251.70&airProductToken=AQpxCjYIxJgBEgQxNjI2GPJcIOO0ASiU-YcDMPP5hwM4RUAAWAFqCU1BSU5CQVNJQ3IIVkFWU0MyQkMKNwjEmAESBDUyNTgY47QBIOywASiv-4cDMPn7hwM4RUABWAFqCU1BSU5CQVNJQ3IIVkFWU0MyQkMKbwo2CMSYARIEMzc3OBjssAEgzHwohuuIAzDn64gDOEVAAFgBaglNQUlOQkFTSUNyCFZBVlNBNUJDCjUIxJgBEgQzOTIxGMx8IPJcKMnsiAMwrO2IAzhFQAFYAWoJTUFJTkJBU0lDcghWQVZTQTVCQxIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, May 13 - Sat, May 16 STL St. Louis ORD Chicago CA $263 Roundtrip found 5 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:ORD,departure:13/05/2026TANYT&leg2=from:ORD,to:STL,departure:16/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:262.90&airProductToken=AQpGCiEIxJgBEgQxMzcxGPJcIOO0ASjm8owDMMHzjAM4RUAAWAEKIQjEmAESBDE2NjgY47QBIK4cKJL0jAMw7fSMAzhFQAFYAQpGCiEIxJgBEgQxNzE2GK4cIOO0ASiblI0DMPKUjQM4RUAAWAEKIQjEmAESBDE1NDEY47QBIPJcKNuWjQMwu5eNAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Mon, Feb 16 - Tue, Feb 17 STL St. Louis MDW Chicago CA $275 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:MDW,departure:16/02/2026TANYT&leg2=from:MDW,to:STL,departure:17/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:274.70&airProductToken=AQpHCiEIxJgBEgQxNjI2GPJcIOO0ASiTqIUDMO-ohQM4RUAAWAEKIgjEmAESBDU0NDYY47QBIOywASi1qoUDMIarhQM4RUABWAEKRQohCMSYARIEMzc5ORjssAEgzHwosLmFAzCUuoUDOEVAAFgBCiAIxJgBEgQxNjA5GMx8IPJcKMe6hQMwo7uFAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Thu, Feb 12 - Mon, Feb 16 STL St. Louis MDW Chicago CA $277 Roundtrip found 6 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:STL,to:MDW,departure:12/02/2026TANYT&leg2=from:MDW,to:STL,departure:16/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:276.90&airProductToken=AQpECh8IxJgBEgM1NjYY8lwg4FwotvuEAzCf_IQDOEVAAFgBCiEIxJgBEgQyMDYxGOBcIOywASjl_IQDMNf9hAM4RUABWAEKRQohCMSYARIEMzc5ORjssAEgzHwokK6FAzD0roUDOEVAAFgBCiAIxJgBEgQxNjA5GMx8IPJcKKevhQMwg7CFAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ## Find the cheapest month to fly from St. Louis (STL) to Chicago (CHI) ### August is typically the cheapest month to fly From CA $106 - CA $428 per traveller. ## Frequently asked questions ### How much is a flight from St. Louis Lambert International Airport to Chicago, IL (CHI-All Airports)? ### Do I need to pay a cancellation fee if I cancel my flight from Lambert Field to Chicago, IL (CHI-All Airports)? ### How do I find cheap flights from STL to Chicago, IL (CHI-All Airports) that have flexible change policies? ### How far is the flight from STL to Chicago, IL (CHI-All Airports)? ### Which airlines fly direct from Lambert Field to Chicago, IL (CHI-All Airports)? ### Are STL to Chicago, IL (CHI-All Airports) flight tickets cheaper when they're purchased at the last minute? ## Travel information | Origin airport | Lambert-St. Louis Intl. | | ------------------- | ----------------------- | | Destination airport | O'Hare Intl. | | Roundtrip price | CA $224 | | Distance | 413 km | ## Book with confidence # St. Louis to Illinois Flights **The easy way to book your flights from St. Louis to Chicago** With Expedia, it’s simple to find and book flights to Chicago from St. Louis 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 CHI-All Airports, 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 St. Louis to Chicago today, tomorrow, or this week. **Save dollars with cheap flights from Lambert-St. Louis Intl., STL to CHI-All Airports, CHI** Sort your search results by price to find great deals on your flight from St. Louis to Chicago—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Chicago from St. Louis currently is just CA $225 rising to CA $277\. Here are more money-saving tips: - Fly in March when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to Chicago - 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 Chicago from St. Louis** 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. 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[Flights from London (LHR) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/lhr/rfd/london-to-rockford) - [Flights from Mackinac Island (MCD) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/mcd/rfd/mackinac-island-to-rockford) - [Flights from Kansas City (MCI) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/mci/ord/kansas-city-to-chicago) - [Flights from Kansas City (MCI) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/mci/rfd/kansas-city-to-rockford) - [Flights from Orlando (MCO) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/mco/ord/orlando-to-chicago) - [Flights from Mexico City (MEX) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/mex/ord/mexico-city-to-chicago) - [Flights from Miami (MIA) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/mia/ord/miami-to-chicago) - [Flights from Minot (MOT) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/mot/ord/minot-to-chicago) - [Flights from Minot (MOT) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/mot/rfd/minot-to-rockford) - [Flights from Muscle Shoals (MSL) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/msl/rfd/muscle-shoals-to-rockford) - [Flights from Madison (MSN) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/msn/ord/madison-to-chicago) - [Flights from Minneapolis (MSP) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/msp/rfd/minneapolis-to-rockford) - [Flights from Tokyo (NRT) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/nrt/rfd/tokyo-to-rockford) - [Flights from Ogdensburg (OGS) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/ogs/ord/ogdensburg-to-chicago) - [Flights from Omaha (OMA) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/oma/ord/omaha-to-chicago) - [Flights from Ontario (ONT) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/ont/ord/ontario-to-chicago) - [Flights from Ontario (ONT) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/ont/rfd/ontario-to-rockford) - [Flights from Chicago (ORD) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/ord/rfd/chicago-to-rockford) - [Flights from Paducah (PAH) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/pah/rfd/paducah-to-rockford) - [Flights from Plattsburgh (PBG) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/pbg/ord/plattsburgh-to-chicago) - [Flights from Portland (PDX) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/pdx/ord/portland-to-chicago) - [Flights from Philadelphia (PHL) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/phl/ord/philadelphia-to-chicago) - [Flights from Pittsburgh (PIT) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/pit/ord/pittsburgh-to-chicago) - [Flights from Redding (RDD) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/rdd/rfd/redding-to-rockford) - [Flights from Rockford (RFD) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/rfd/ord/rockford-to-chicago) - [Flights from Roswell (ROW) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/row/rfd/roswell-to-rockford) - [Flights from San Diego (SAN) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/san/ord/san-diego-to-chicago) - [Flights from Louisville (SDF) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/sdf/ord/louisville-to-chicago) - [Flights from Santander (SDR) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/sdr/rfd/santander-to-rockford) - [Flights from San Francisco (SFO) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/sfo/ord/san-francisco-to-chicago) - [Flights from Salt Lake City (SLC) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/slc/ord/salt-lake-city-to-chicago) - [Flights from Syracuse (SYR) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/syr/rfd/syracuse-to-rockford) - [Flights from Sault Ste. Marie (YAM) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yam/ord/sault-ste-marie-to-chicago) - [Flights from Nanaimo (YCD) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/ycd/ord/nanaimo-to-chicago) - [Flights from Edmonton (YEG) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yeg/rfd/edmonton-to-rockford) - [Flights from Fredericton (YFC) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yfc/ord/fredericton-to-chicago) - [Flights from Kingston (YGK) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/ygk/ord/kingston-to-chicago) - [Flights from Hamilton (YHM) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yhm/rfd/hamilton-to-rockford) - [Flights from Halifax (YHZ) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yhz/rfd/halifax-to-rockford) - [Flights from Kamloops (YKA) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yka/ord/kamloops-to-chicago) - [Flights from Kelowna (YLW) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/ylw/rfd/kelowna-to-rockford) - [Flights from Ottawa (YOW) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yow/rfd/ottawa-to-rockford) - [Flights from Peterborough (YPQ) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/ypq/ord/peterborough-to-chicago) - [Flights from Québec (YQB) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yqb/ord/quebec-to-chicago) - [Flights from Moncton (YQM) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yqm/ord/moncton-to-chicago) - [Flights from Sudbury (YSB) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/ysb/ord/sudbury-to-chicago) - [Flights from Toronto (YTO) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yto/rfd/toronto-to-rockford) - [Flights from Toronto (YTZ) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/ytz/ord/toronto-to-chicago) - [Flights from Montreal (YUL) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yul/rfd/montreal-to-rockford) - [Flights from Vancouver (YVR) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yvr/rfd/vancouver-to-rockford) - [Flights from Winnipeg (YWG) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/ywg/rfd/winnipeg-to-rockford) - [Flights from Abbotsford (YXX) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yxx/ord/abbotsford-to-chicago) - [Flights from North Bay (YYB) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yyb/ord/north-bay-to-chicago) - [Flights from Calgary (YYC) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yyc/rfd/calgary-to-rockford) - [Flights from Charlottetown (YYG) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yyg/ord/charlottetown-to-chicago) - [Flights from St. John's (YYT) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yyt/ord/st-johns-to-chicago) - [Flights from Toronto (YYZ) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yyz/ord/toronto-to-chicago) - [Flights from Toronto (YYZ) to Rockford (RFD) ](https://www.expedia.ca/lp/flights/yyz/rfd/toronto-to-rockford) - [Flights from Sarnia (YZR) to Chicago (ORD) ](https://www.expedia.ca/lp/flights/yzr/ord/sarnia-to-chicago) \*Available to Expedia members.