Title: CA $84 Cheap Flights from Seattle (SEA) to Chicago (ORD) - 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 Seattle-Tacoma International Airport (SEA) to Chicago O'Hare International Airport (ORD) - ![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:sea,to:ord,departure:11/11/2025TANYT&leg2=from:ord,to:sea,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![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:sea,to:ord,departure:11/11/2025TANYT&leg2=from:ord,to:sea,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) - ![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:sea,to:ord,departure:11/11/2025TANYT&leg2=from:ord,to:sea,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![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:sea,to:ord,departure:11/11/2025TANYT&leg2=from:ord,to:sea,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![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:sea,to:ord,departure:11/11/2025TANYT&leg2=from:ord,to:sea,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![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:sea,to:ord,departure:11/11/2025TANYT&leg2=from:ord,to:sea,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![Sun Country Airlines](https://a.travel-assets.com/air/airlines/sy_sq.svg) Sun Country Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:sea,to:ord,departure:11/11/2025TANYT&leg2=from:ord,to:sea,departure:18/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"SY"}}]) ![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 Seattle (SEA) to Chicago (ORD) Prices were available within the past 7 days and start at CA $84 for one-way flights and CA $148 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) Sat, Dec 6 - Sat, Dec 13 SEA Seattle ORD Chicago CA $148 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:06/12/2025TANYT&leg2=from:ORD,to:SEA,departure:13/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:147.30&airProductToken=AQozCjEIwYIBEgQyMzk4GJIBIK4cKPaC_wIw-IT_AjhCQABYAWoFQkFTSUNyCE9WQUhVU0JYCjMKMQjBggESBDMyMjEYrhwgkgEoutP_AjDd1f8COEJAAFgBagVCQVNJQ3IIT1ZBSFVTQlgSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sat, Dec 6 - Sat, Dec 13 SEA Seattle ORD Chicago CA $148 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:06/12/2025TANYT&leg2=from:ORD,to:SEA,departure:13/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:147.30&airProductToken=AQo3CjUIxJgBEgQyMjk5GJIBIK4cKKOB_wIwloP_AjhFQABYAWoJTUFJTkJBU0lDcghWQVZTSDNCQwo3CjUIxJgBEgQxNDE4GK4cIJIBKLrQ_wIw1NL_AjhFQABYAWoJTUFJTkJBU0lDcghWQVZTSDNCQxIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Sat, Dec 6 - Sat, Dec 13 SEA Seattle ORD Chicago CA $150 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:06/12/2025TANYT&leg2=from:ORD,to:SEA,departure:13/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:149.38&airProductToken=AQo3CjUIxJgBEgQyMTA4GJIBIK4cKLOE_wIwp4b_AjhFQABYAWoJTUFJTkJBU0lDcghWQVZTSDNCQxIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Thu, Dec 25 - Tue, Jan 6 SEA Seattle ORD Chicago CA $157 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:25/12/2025TANYT&leg2=from:ORD,to:SEA,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:157.00&airProductToken=AQoiCiAIxJgBEgQyMTA4GJIBIK4cKJPagAMwh9yAAzhFQABYAQoiCiAIxJgBEgQyMDU1GK4cIJIBKMTegQMw3OCBAzhFQABYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Thu, Jan 22 - Mon, Feb 9 SEA Seattle ORD Chicago CA $167 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:22/01/2026TANYT&leg2=from:ORD,to:SEA,departure:09/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:166.60&airProductToken=AQoiCiAIxJgBEgQyMTA4GJIBIK4cKImVgwMw-JaDAzhFQABYAQoiCiAIxJgBEgQyMDU1GK4cIJIBKITdhAMwnN-EAzhFQABYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Tue, Jan 20 - Fri, Feb 6 SEA Seattle ORD Chicago CA $175 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:20/01/2026TANYT&leg2=from:ORD,to:SEA,departure:06/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:174.20&airProductToken=AQoiCiAIxJgBEgQyMTA4GJIBIK4cKMn-ggMwuICDAzhFQABYAQoiCiAIxJgBEgQyMDU1GK4cIJIBKKS7hAMwvL2EAzhFQABYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Thu, Jan 22 - Fri, Feb 6 SEA Seattle ORD Chicago CA $184 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:22/01/2026TANYT&leg2=from:ORD,to:SEA,departure:06/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:183.80&airProductToken=AQoiCiAIxJgBEgQyMTA4GJIBIK4cKImVgwMw-JaDAzhFQABYAQoiCiAIxJgBEgQyMDU1GK4cIJIBKKS7hAMwvL2EAzhFQABYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Sat, Dec 6 - Sat, Dec 13 SEA Seattle ORD Chicago CA $214 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:06/12/2025TANYT&leg2=from:ORD,to:SEA,departure:13/12/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:213.37&airProductToken=AQovCi0IwaYBEgMyNjUYkgEgrhwo-f_-AjD3gf8COFhAAFgBagJTVnIIT0gyT0FWQk4SCggBEAEYASoCQVMYASIECAEQASgCKAMoBDAB) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Thu, Jan 29 - Mon, Feb 2 SEA Seattle ORD Chicago CA $374 Roundtrip just found [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:29/01/2026TANYT&leg2=from:ORD,to:SEA,departure:02/02/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:373.90&airProductToken=AQozCjEI1YIBEgQyMzQwGJIBIK4cKJLigwMwieSDAzhHQABYAWoFMl9lY29yCEdBQTJBWERTCjMKMQjVggESBDE2MTcYrhwgkgEo6I2EAzCBkIQDOEdAAFgBagUyX2Vjb3IIR0FBMkFYRFMSCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAL) ![Sun Country Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/SY.GIF) Sat, Dec 20 - Sun, Dec 21 SEA Seattle ORD Chicago CA $455 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:SEA,to:ORD,departure:20/12/2025TANYT&leg2=from:ORD,to:SEA,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:454.54&airProductToken=AQpUCigI07IBEgMyOTAYkgEgzHwo36SAAzCppoADOFZAAFgBcgdWMkRBQ0FVCigI07IBEgMyNjEYzHwgrhwo8KuAAzDSrIADOFZAAVgBcgdWMkRBQ0FVClQKKAjTsgESAzI2MhiuHCDMfCiOrYADMPGtgAM4U0AAWAFyB1M0REFDQVkKKAjTsgESAzI4MxjMfCCSASjQsoADMMC0gAM4U0ABWAFyB1M0REFDQVkSCggBEAEYASoCU1kYASIECAEQASgCKAMoBDAN) ## Find the cheapest month to fly from Seattle (SEA) to Chicago (ORD) ### November is typically the cheapest month to fly From CA $134 - CA $405 per traveller. ## Alternative airports near Chicago Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:ORD,departure:11/11/2025TANYT&leg2=from:ORD,to:SEA,departure:13/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ORD O'Hare Intl. Cheapest 23 min [Flights from CA $361](https://www.expedia.ca/Flights-Search?leg1=from:SEA,to:ORD,departure:11/11/2025TANYT&leg2=from:ORD,to:SEA,departure:13/11/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Frequently asked questions ### How much is a flight from SEA to ORD? > Start packing your suitcase, because round-trip flights between Sea-Tac Airport and O'Hare Airport start from CA $148. That's based on fares listed within the last 7 days on Expedia for flights departing within the next year. Prices can rise quickly, so book today to lock in the best deal. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from Seattle - Tacoma Intl. Airport (SEA) to O'Hare Airport? > Every air carrier has different terms and conditions. If you decide to cancel your vacation, head to our [Customer Service Portal](https://www.expedia.ca/helpcenter). ### How do I find cheap flights from Seattle - Tacoma Intl. Airport (SEA) to ORD that have flexible change policies? > Flights from Sea-Tac Airport to O'Hare Intl. Airport (ORD) with flexible change policies are available with many airlines. Simply use our "No change fees" filter during your search. You'll only need to pay the cost difference between flights, with no added fees to worry about. ### How many hours is the flight from Seattle - Tacoma Intl. Airport (SEA) to O'Hare Airport? > There are plenty of ways to make the 4 hours and 4 minutes between SEA and O'Hare Airport go by quicker. Be productive and sort through your photos or clear out all those unwanted emails. A good snooze also helps pass the time! ### How far is the flight from Seattle - Tacoma Intl. Airport (SEA) to O'Hare Airport? > The flight distance from SEA to ORD is 2,800 kilometres. Bring along a drink, some snacks and a good book to read. Keep yourself entertained and the hours will fly by. ### Which airlines fly direct from SEA to O'Hare Airport? > Whether you're after a return or one-way flight, you'll have your pick of airlines that will fly you directly from Sea-Tac Airport to ORD. These are some of the most popular ones: > > > > - United Airlines - (UA) with 91 monthly flights > - Alaska Airlines - (AS) with 86 monthly flights > - Delta - (DL) with 56 monthly flights > - American Airlines - (AA) with 26 monthly flights ### Are SEA to O'Hare Intl. Airport (ORD) flight tickets cheaper when they're purchased at the last minute? > Flight prices go up and down like a yo-yo, so it's no sure thing. While last-minute deals between Sea-Tac Airport and ORD are possible, it's also a good idea to keep track of prices well before you fly. In fact, some airlines advertise their prices up to 12 months ahead of the departure date. Expedia is constantly updating the biggest airfare bargains around, so check back often and be ready to secure your seat when prices drop. ## Book with confidence ### Seattle to Chicago Flights **The easy way to book your flights from Seattle to Chicago**  With Expedia, it’s simple to find and book flights to Chicago from Seattle 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 O'Hare 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 Seattle to Chicago today, tomorrow, or this week.   **Save dollars with cheap flights from Seattle - Tacoma Intl., SEA to O'Hare Intl., ORD**  Sort your search results by price to find great deals on your flight from Seattle to Chicago—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Chicago from Seattle currently is just CA $148 rising to CA $455.   Here are more money-saving tips:  - Fly in December 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 Seattle**  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 Chicago with Expedia today. ## Explore a world of travel with Expedia - Flights - [Flights from Calgary to Rosemont](https://www.expedia.ca/lp/flights/178245/7581/calgary-to-rosemont) - [Flights from Denver to Northwest Chicago](https://www.expedia.ca/lp/flights/178254/6350697/denver-to-northwest-chicago) - [Flights from Los Angeles to Evanston](https://www.expedia.ca/lp/flights/178280/8049/los-angeles-to-evanston) - [Flights from Mexico City to Northwest Chicago](https://www.expedia.ca/lp/flights/178285/6350697/mexico-city-to-northwest-chicago) - [Flights from New York to Evanston](https://www.expedia.ca/lp/flights/178293/8049/new-york-to-evanston) - [Flights from Ottawa to Evanston](https://www.expedia.ca/lp/flights/178296/8049/ottawa-to-evanston) - [Flights from Philadelphia to Rosemont](https://www.expedia.ca/lp/flights/178297/7581/philadelphia-to-rosemont) - [Flights from Portland to Rosemont](https://www.expedia.ca/lp/flights/178299/7581/portland-to-rosemont) - 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