Title: CA $151 Cheap Flights from Washington (WAS) to Seattle (SEA) - Expedia.ca ![](https://images.trvl-media.com/place/178307/82efb684-8d05-4b09-b7ea-52d5ab4ea1ac.jpg?impolicy=fcrop&w=1200&h=500&q=medium) ![](https://images.trvl-media.com/place/178307/82efb684-8d05-4b09-b7ea-52d5ab4ea1ac.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # CA $151 Cheap Flights from Washington (WAS) to Seattle (SEA) [View CA $151 flight on Sat, May 2, 2026](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:BWI,to:SEA,departure:02/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:150.20&airProductToken=AQpoCjIIwYIBEgQxOTMwGMFFIKOxASi794sDMJb5iwM4QkAAWAFqBUJBU0lDcghRVkFaWk5CVgoyCMGCARIEMjAwMxijsQEgkgEo-fmLAzD7-4sDOEJAAVgBagVCQVNJQ3IIUVZBWlpOQlYSCggBEAEYASoCQUEYASIECAEQASgCKAMoBDAL) ## Popular airlines from Washington to Seattle, WA (SEA-Seattle - Tacoma Intl.) - ![](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:WAS,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:WAS,departure:25/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AS"}}]) - ![](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:WAS,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:WAS,departure:25/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) - ![](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:WAS,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:WAS,departure:25/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![](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:WAS,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:WAS,departure:25/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"UA"}}]) - ![](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:WAS,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:WAS,departure:25/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"WN"}}]) - ![](https://a.travel-assets.com/air/airlines/sy_sq.svg) Sun Country Airlines [](https://www.expedia.ca/Flights-Search?leg1=from:WAS,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:WAS,departure:25/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"SY"}}]) - ![](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:WAS,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:WAS,departure:25/04/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"F9"}}]) - ![](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\* - ![](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\* - ![](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 Washington (WAS) to Seattle (SEA) Prices were available within the past 7 days and start at CA $151 for one-way flights and CA $274 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) Tue, Apr 28 - Thu, May 7 BWI Baltimore SEA Seattle CA $274 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:28/04/2026TANYT&leg2=from:SEA,to:BWI,departure:07/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:273.60&airProductToken=AQpFCiEIxJgBEgQyNjAxGMFFIOO0ASjbxYsDMLzGiwM4RUAAWAEKIAjEmAESAzczNBjjtAEgkgEo7saLAzCcyYsDOEVAAVgBCkQKIAjEmAESBDEyMzkYkgEg8hIo87KMAzD2s4wDOEVAAFgBCiAIxJgBEgQyMDc5GPISIMFFKJS0jAMwibaMAzhFQAFYARIKCAEQARgBKgJETBgBIgQIARABKAQwAQ) ![American Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AA.gif) Tue, Jul 14 - Wed, Jul 15 BWI Baltimore SEA Seattle CA $302 Roundtrip found 1 hour ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:14/07/2026TANYT&leg2=from:SEA,to:BWI,departure:15/07/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:301.50&airProductToken=AQpoCjIIwYIBEgQxNjI2GMFFIKOxASiUrpIDMOKvkgM4QkAAWAFqBUJBU0lDcghRVkFaWk5CVgoyCMGCARIEMTQ4NxijsQEgkgEonbCSAzCdspIDOEJAAVgBagVCQVNJQ3IIUVZBWlpOQlYKaAoyCMGCARIEMjUyORiSASDimgEo97eSAzCzupIDOEJAAFgBagVCQVNJQ3IIUVZBWlpOQlYKMgjBggESBDEzMTgY4poBIMFFKIW7kgMw3ruSAzhCQAFYAWoFQkFTSUNyCFFWQVpaTkJWEgoIARABGAEqAkFBGAEiBAgBEAEoAigDKAQwCw) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Fri, Apr 24 - Fri, May 1 BWI Baltimore SEA Seattle CA $305 Roundtrip found 2 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:24/04/2026TANYT&leg2=from:SEA,to:BWI,departure:01/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:304.76&airProductToken=AQptCjUIxJgBEgQyNTY1GMFFIMx8KPqeiwMwmaCLAzhFQABYAWoJTUFJTkJBU0lDcghWQVZOQTBCUQo0CMSYARIDNTA1GMx8IJIBKNCgiwMwvqKLAzhFQAFYAWoJTUFJTkJBU0lDcghWQVZOQTBCURIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Wed, Apr 22 - Mon, Apr 27 BWI Baltimore SEA Seattle CA $330 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:22/04/2026TANYT&leg2=from:SEA,to:BWI,departure:27/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:329.60&airProductToken=AQpFCiEIxJgBEgQxNTQ2GMFFIOO0ASiThIsDMPGEiwM4RUAAWAEKIAjEmAESAzcyOBjjtAEgkgEolIWLAzC9h4sDOEVAAVgBCkUKIAjEmAESAzgxMBiSASDjtAEo9sOLAzD2xYsDOEVAAFgBCiEIxJgBEgQxNTQ2GOO0ASDBRSi8xosDMJfHiwM4RUABWAESCggBEAEYASoCREwYASIECAEQASgEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Mon, May 4 - Thu, May 7 BWI Baltimore SEA Seattle CA $331 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:04/05/2026TANYT&leg2=from:SEA,to:BWI,departure:07/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:330.60&airProductToken=AQptCjUIxJgBEgQxNDM1GMFFIOBcKM2OjAMwwo-MAzhFQABYAWoJTUFJTkJBU0lDcghYQVZUQTBCQwo0CMSYARIDOTAzGOBcIJIBKLCQjAMw_ZKMAzhFQAFYAWoJTUFJTkJBU0lDcghYQVZUQTBCQwpuCjUIxJgBEgQxMTY1GJIBIPISKO2xjAMw8LKMAzhFQABYAWoJTUFJTkJBU0lDcghWQVZTQTBCQwo1CMSYARIEMjA3ORjyEiDBRSiUtIwDMIm2jAM4RUABWAFqCU1BSU5CQVNJQ3IIVkFWU0EwQkMSCggBEAEYASoCREwYASIECAEQASgCKAMoBDAB) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Fri, Apr 17 - Sat, Apr 25 BWI Baltimore SEA Seattle CA $337 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:17/04/2026TANYT&leg2=from:SEA,to:BWI,departure:25/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:337.00&airProductToken=AQptCjUIxJgBEgQyNTY1GMFFIMx8KJrQigMwuNGKAzhFQABYAWoJTUFJTkJBU0lDcghWQVVTQTBCQwo0CMSYARIDNTA1GMx8IJIBKPDRigMw3tOKAzhFQAFYAWoJTUFJTkJBU0lDcghWQVVTQTBCQwptCjQIxJgBEgM1NjIYkgEg4FwogaaLAzCiqIsDOEVAAFgBaglNQUlOQkFTSUNyCFZBVk5BMEJRCjUIxJgBEgQyOTI4GOBcIMFFKOepiwMw0aqLAzhFQAFYAWoJTUFJTkJBU0lDcghWQVZOQTBCURIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) ![Delta](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/DL.gif) Fri, Apr 17 - Sat, Apr 25 BWI Baltimore SEA Seattle CA $340 Roundtrip found 1 day ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:17/04/2026TANYT&leg2=from:SEA,to:BWI,departure:25/04/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:339.48&airProductToken=AQptCjUIxJgBEgQyNTY1GMFFIMx8KJrQigMwuNGKAzhFQABYAWoJTUFJTkJBU0lDcghWQVVTQTBCQwo0CMSYARIDNTA1GMx8IJIBKPDRigMw3tOKAzhFQAFYAWoJTUFJTkJBU0lDcghWQVVTQTBCQxIKCAEQARgBKgJETBgBIgQIARABKAIoAygEMAE) ![Alaska Airlines](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/AS.gif) Tue, Jun 2 - Mon, Jun 15 BWI Baltimore SEA Seattle CA $371 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:02/06/2026TANYT&leg2=from:SEA,to:BWI,departure:15/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:370.30&airProductToken=AQohCh8IwaYBEgMzNzkYwUUgkgEo59WOAzDG2I4DOFhAAFgBCiEKHwjBpgESAzc4MRiSASDBRSi06o8DMOXsjwM4WEAAWAESCggBEAEYASoCQVMYASIECAEQASgEMAE) ![United](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/UA.gif) Thu, Apr 30 - Tue, May 5 BWI Baltimore SEA Seattle CA $382 Roundtrip found 3 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:BWI,to:SEA,departure:30/04/2026TANYT&leg2=from:SEA,to:BWI,departure:05/05/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:381.87&airProductToken=AQplCjEI1YIBEgQyMTkyGMFFILJxKJ3ciwMwj9-LAzhLQABYAWoFMl9lY29yCEtBQTJBRkROCjAI1YIBEgM2OTQYsnEgkgEowd-LAzDN4IsDOEtAAFgBagUyX2Vjb3IIS0FBMkFGRE4SCggBEAEYASoCVUEYASIECAEQASgCKAMoBDAL) ![JetBlue Airways](//images.trvl-media.com/media/content/expus/graphics/static_content/fusion/v0.1b/images/airlines/b6.gif) Tue, Jun 2 - Mon, Jun 15 DCA Washington SEA Seattle CA $545 Roundtrip found 4 days ago [](https://expedia.ca/Flights-Search?trip=roundtrip&leg1=from:DCA,to:SEA,departure:02/06/2026TANYT&leg2=from:SEA,to:DCA,departure:15/06/2026TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:544.50&airProductToken=AQpCCh8IwmwSBDI5NTQYQyDBkwEo5dSOAzDH1Y4DOExAAFgBCh8IwmwSAzM5NxjBkwEgkgEolNuOAzCN3o4DOExAAVgBCkIKHwjCbBIDMTk4GJIBIMGTASi0648DMPDtjwM4TEAAWAEKHwjCbBIEMTA1NRjBkwEgQyjv7o8DMNLvjwM4TEABWAESCggBEAEYASoCQjYYASIECAEQASgEMAE) ## Alternative airports near Seattle Prices were available within the past 7 days. Prices and availability are subject to change. [](https://www.expedia.ca/Flights-Search?leg1=from:BWI,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:BWI,departure:04/05/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) SEA Seattle - Tacoma Intl. Cheapest 20 min [Flights from CA $441 ](https://www.expedia.ca/Flights-Search?leg1=from:BWI,to:SEA,departure:18/04/2026TANYT&leg2=from:SEA,to:BWI,departure:04/05/2026TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&sortOrder=INCREASING&sortType=PRICE) ## Find the cheapest month to fly from Washington (WAS) to Seattle (SEA) ### May is typically the cheapest month to fly From CA $221 - CA $456 per traveller. ## Frequently asked questions ### How much is a flight from Washington, DC (WAS-All Airports) to Seattle - Tacoma Intl. Airport (SEA)? ### Do I need to pay a cancellation fee if I cancel my flight from Washington, DC (WAS-All Airports) to SEA? ### How do I find cheap flights from Washington, DC (WAS-All Airports) to SEA that have flexible change policies? ### How far is the flight from Washington, DC (WAS-All Airports) to SEA? ### Which airlines fly direct from Washington, DC (WAS-All Airports) to Sea-Tac Airport? ### Are Washington, DC (WAS-All Airports) to Seattle - Tacoma Intl. Airport (SEA) flight tickets cheaper when they're purchased at the last minute? ## Travel information | Origin airport | Baltimore Washington Intl. Thurgood Marshall | | ------------------- | ---------------------------------------------------------------------------------------- | | Destination airport | Seattle - Tacoma Intl. | | Airlines serving | Alaska Airlines, American Airlines, Delta, JetBlue Airways, Sun Country Airlines, United | | Roundtrip price | CA $274 | | Distance | 3725 km | ## Book with confidence # Maryland to Seattle Flights **The easy way to book your flights from Washington to Seattle** With Expedia, it’s simple to find and book flights to Seattle from Washington 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 Seattle - Tacoma 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 Washington to Seattle today, tomorrow, or this week. **Save dollars with cheap flights from WAS-All Airports, WAS to Seattle - Tacoma Intl., SEA** Sort your search results by price to find great deals on your flight from Washington to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Washington currently is just CA $274 rising to CA $545\. Here are more money-saving tips: - Fly in April when flight prices are normally at their lowest - Book about a month to 6 weeks before you travel for the best prices to Seattle - 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 Seattle from Washington** 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 Seattle with Expedia today. \*Available to Expedia members.