Title: CA $611 Cheap Flights from Tri-Cities (TRI) 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://a.travel-assets.com/travel-assets-manager/fallback-images-brand/bex_flights_v2.jpg?impolicy=fcrop&w=1200&h=500&q=medium) # CA $611 Cheap Flights from Tri-Cities (TRI) to Seattle (SEA) [View CA $611 flight on Mon, Oct 27, 2025](https://expedia.ca/Flights-Search?trip=oneway&leg1=from:TRI,to:SEA,departure:27/10/2025TANYT&passengers=children:0,adults:1,seniors:0,infantinlap:N&mode=search&options=sortby:price&paandi=true&flp=mdl:flights-flex-module,price:610.20&airProductToken=AQqkAQo1CMSYARIENDc0NxizRCDgXCiVwfsCMOLB-wI4VEAAWAFqCU1BSU5DTEFTQ3IIVEFWUUEwTVEKNQjEmAESBDIzOTUY4FwgojUo28L7AjCvw_sCOFRAAVgBaglNQUlOQ0xBU0NyCFRBVlFBME1RCjQIxJgBEgM5NjYYojUgkgEozMb7AjD7yPsCOFhAAVgBaglNQUlOQ0xBU0NyCFhBVlNIM01FEgoIARABGAEqAkRMGAEiBAgBEAEoAigDKAQwAQ) - [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 Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle-Tacoma International Airport (SEA) - ![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:tri,to:sea,departure:21/10/2025TANYT&leg2=from:sea,to:tri,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"DL"}}]) - ![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:tri,to:sea,departure:21/10/2025TANYT&leg2=from:sea,to:tri,departure:28/10/2025TANYT&trip=roundtrip&passengers=adults:1,children:0,infantinlap:N&mode=search&pageId=0&filters=[{"preferredAirlineFilterValue":{"carrierCode":"AA"}}]) ![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 Tri-Cities (TRI) to Seattle (SEA) Prices were available within the past 7 days and start at CA $611 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply. All deals One way Roundtrip ## Find the cheapest month to fly from Blountville (TRI) to Seattle (SEA) ### September is typically the cheapest month to fly From CA $511 - CA $1,001 per traveller. ## Frequently asked questions ### How much is a flight from TRI to Sea-Tac Airport? > Round-trip tickets from TRI to Seattle - Tacoma Intl. Airport (SEA) start from . This price is based on fares quoted within the last 7 days on Expedia for flights departing within the next year — make your booking ASAP to avoid missing out. Prices and availability are subject to change. Additional terms apply. ### Do I need to pay a cancellation fee if I cancel my flight from TRI to Sea-Tac Airport? > Each air carrier has its own set of terms and conditions. If you decide to cancel your trip, head to our [Customer Service Portal](https://www.expedia.ca/helpcenter). ### How do I find cheap flights from Tri-Cities Airport to Sea-Tac Airport that have flexible change policies? > Many airlines offer the option to move your flight at no extra charge. All you pay is the cost difference between flights. When searching for Tri-Cities Regional Airport (TRI) to Sea-Tac Airport flights, you'll see a "No change fees" filter for you to pick. ### How many hours is the flight from TRI to Sea-Tac Airport? > It takes around 7 hours and 18 minutes to jet from Tri-Cities Regional Airport (TRI) to Seattle - Tacoma Intl. Airport (SEA). But with some movies and a good book, the time will pass by quicker. ### How far is the flight from Tri-Cities Airport to Sea-Tac Airport? > The flight distance from Tri-Cities Regional Airport (TRI) to Seattle - Tacoma Intl. Airport (SEA) is 3,500 kilometres. Bring along a drink, a few snacks and a good book to read. Keep yourself entertained and the hours will fly by. ### Which airlines fly direct from TRI to Seattle - Tacoma Intl. Airport (SEA)? > You won't find any airlines flying directly between TRI and Sea-Tac Airport, so be prepared to make at least one stop on your journey. A layover can be a welcome way to break up a trip! ### Are TRI to Sea-Tac Airport flight tickets cheaper when they're purchased at the last minute? > Flight prices change all the time, so not always. While last-minute deals between Tri-Cities Airport and Sea-Tac Airport are of course possible, it's also a good idea to monitor prices well before you fly. In fact, some airlines publicize their prices up to a year ahead of the departure date. Expedia is continuously updating the biggest bargains around, so keep checking and be ready to secure your seat when prices drop. ## Travel information | Origin airport | Tri-Cities Regional | | --- | --- | | Destination airport | Seattle - Tacoma Intl. | | Distance | 3451 km | ## Book with confidence ### Blountville to Seattle Flights **The easy way to book your flights from Tri-Cities to Seattle**  With Expedia, it’s simple to find and book flights to Seattle from Tri-Cities whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 2 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 Tri-Cities to Seattle today, tomorrow, or this week.   **Save dollars with cheap flights from Tri-Cities Regional, TRI to Seattle - Tacoma Intl., SEA**  Sort your search results by price to find great deals on your flight from Tri-Cities to Seattle—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Seattle from Tri-Cities currently is just rising to .   Here are more money-saving tips:  - Fly in 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 Tri-Cities**  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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