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CA $514 Cheap Flights from Tri-Cities (TRI) to Seattle (SEA)

View CA $514 flight on Tue, Nov 3, 2026Opens in a new window

Popular airlines from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle-Tacoma International Airport (SEA)

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Cheap flights from Tri-Cities (TRI) to Seattle (SEA)

Prices were available within the past 7 days and start at CA $514 for one-way flights and for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Find the cheapest month to fly from Tri-Cities (TRI) to Seattle (SEA)

April is typically the cheapest month to fly

From CA $409 - CA $852 per traveller.

Frequently asked questions

How much does a flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.) cost?
You can find one-way and return flights from TRI to SEA with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when TRI to SEA ticket fares go up or down.
What is the cheapest month to fly from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The cheapest months to fly from TRI to SEA are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
Enter TRI to SEA and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
American Airlines is one of the cheapest airlines offering connecting return flights from Tri-Cities Regional (TRI) to Seattle - Tacoma Intl. (SEA), with prices starting from around CA$398 for flights that can be booked for departure within the next year, with a layover in Charlotte-Douglas Intl. (CLT). These prices are per adult for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are approximately 18 connecting flights per day from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.). Some common connection points include Hartsfield-Jackson Atlanta Intl. (ATL), O'Hare Intl. (ORD), and Charlotte-Douglas Intl. (CLT).
What is the earliest flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Tri-Cities Regional (TRI) to Seattle - Tacoma Intl. (SEA) typically departs around 5:00 AM. This service is offered by American Airlines. This is a seasonal service active in November. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll find the most flights from Tri-Cities Regional (TRI) to Seattle - Tacoma Intl. (SEA) on a Friday, with around 13 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include American Airlines, Delta, and United. Flight schedules are fairly consistent throughout the week, so you'll have several flight options no matter which day you choose to fly.
What are the most popular departure times for flights from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Tri-Cities Regional (TRI) to Seattle - Tacoma Intl. (SEA) are in the morning, from 6am to 9am. Many major carriers, including American Airlines, Delta and United, offer flights during this window. Many travellers prefer these early morning flights as they allow you to arrive at your destination with plenty of time to start your day.
How long does it take to fly from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
There are no nonstop flights from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.). For this route, which covers a distance of approximately 3471 kilometres, flights with one stop typically take around 9 hours 18 minutes. If you opt for flights with two or more stops, your travel time will be longer, usually around 13 hours. Keep in mind that actual flight times can vary due to factors like routing, weather, and wind patterns.
Can you fly business or first class from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You can fly first class between TRI and SEA. First class cabins are available on United, Delta, and American Airlines.
How do I earn miles on a Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Seattle, WA (SEA) from Tri-Cities, TN (TRI)?
If you're planning to travel to Seattle from Tri-Cities Regional (TRI), you can fly directly into Seattle - Tacoma Intl. (SEA) which offers international flights and connections. Some flights may connect through major hubs like Hartsfield-Jackson Atlanta Intl. (ATL), Charlotte-Douglas Intl. (CLT), or O'Hare Intl. (ORD) before reaching Seattle. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.) at the last minute?
Typically, booking a last minute flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package?
Securing a Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Tri-Cities, TN (TRI-Tri-Cities Regional) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Tri-Cities Regional
Destination airport
Seattle - Tacoma Intl.
Distance
3451 km

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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 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 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. So book your flight to Seattle with Expedia today.

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