$372 Cheap Flights from Seattle (SEA) to Tri-Cities (TRI)
Popular airlines from Seattle-Tacoma International Airport (SEA) to Tri-Cities, TN (TRI-Tri-Cities Regional)
American AirlinesAmerican Airlines
DeltaDelta
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Cheap Flights from Seattle to Tri-Cities (SEA-TRI)
Find the cheapest month to fly from Seattle (SEA) to Tri-Cities (TRI)
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Seattle (SEA) to Tri-Cities (TRI) at a glance
Travel between Seattle (SEA) and Tri-Cities (TRI) with a range of airlines servicing this domestic short-haul route. Explore options from both full-service and budget carriers to find the flight that aligns with your budget, schedule, and travel needs while you discover the iconic attractions and neighborhoods of Tri-Cities. Here, you can find essential information for flights departing from Seattle-Tacoma International Airport (SEA) to Tri-Cities Regional Airport (TRI).
- Fastest flight duration: around 6h 15m in-flight, plus roughly 1h 30m layover with one stop
- Route distance: roughly 2,200 miles (3,540 km)
- Flights per week: around 8 departures on average
- Typical fares (one-way): economy tickets often range from $185–$535, depending on seasonality and how far ahead you book
Flights from Seattle - Tacoma International Airport (SEA) to Tri-Cities Regional Airport (TRI)
Based on recent traveler preferences, here are the top airlines flying from Seattle to Tri-Cities, often selected for one-stop and multi-stop journeys. Popular layover options include Charlotte-Douglas International Airport (CLT) with a layover of about 1 hour and 30 minutes, Hartsfield-Jackson Atlanta International Airport (ATL) offering around a 2-hour layover, and Dallas-Fort Worth International Airport (DFW) with approximately a 1 hour and 15-minute layover. This variety allows you to tailor your itinerary based on price, total travel time, and cabin class.
- American Airlines: This full-service airline provides one-stop service, with one-way ticket prices generally falling between $185 and $510. It accounts for around 64% of departures for this route, with a flight duration of 6 hours and 15 minutes, leading to a total travel time of approximately 7 hours and 45 minutes, including layover time.
- Delta: Another full-service option, Delta offers one-stop service with one-way fares typically ranging from $190 to $955. It makes up about 36% of the departures on this route, with an in-flight time of 6 hours and 15 minutes, resulting in a total journey time of about 7 hours and 45 minutes, factoring in the layover.
Travelers flying from Seattle to Tri-Cities have the option to upgrade their experience, with Delta providing both first-class and premium economy service on this route.
Best time to fly from Seattle (SEA) to Tri-Cities (TRI)
The most popular months for travelers flying from Seattle to Tri-Cities are March, July, and August, when peak temperatures in Tri-Cities reach up to 74.3°F in July. If you prefer quieter travel, consider November, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 45.7°F. For better deals, September usually offers the lowest average one-way fare around $277. Flight availability peaks in July, with approximately 11 flights per week, making it easier to find convenient departure times.
- Cheapest time to fly: September usually offers good deals with average one-way fare around $277, roughly 28% cheaper than the yearly average.
- More budget-friendly months to fly: August and October typically offer average one-way fares of around $285.
- Most flight options: July has the highest number of flights from Seattle to Tri-Cities, with approximately 11 flights per week, giving you more flexibility in scheduling your trip.
| Month | Temperature | Demand | Weekly Flights | Average one-way Fare |
| January | 34.9°F (1.6°C) | Average | 7 | $421 |
| February | 39.4°F (4.1°C) | Slightly Low | 7 | $400 |
| March | 46.4°F (8.0°C) | Slightly High | 7 | $596 |
| April | 55.0°F (12.8°C) | Average | 10 | $376 |
| May | 63.9°F (17.7°C) | Average | 9 | $471 |
| June | 71.1°F (21.7°C) | Average | 8 | $327 |
| July | 74.3°F (23.5°C) | Slightly High | 11 | $381 |
| August | 73.0°F (22.8°C) | Slightly High | 8 | $281 |
| September | 67.8°F (19.9°C) | Average | 7 | $277 |
| October | 56.7°F (13.7°C) | Average | 9 | $289 |
| November | 45.7°F (7.6°C) | Slightly Low | 7 | $353 |
| December | 39.9°F (4.4°C) | Slightly Low | 9 | $491 |
*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.
Alternative route from Seattle (SEA) to Tri-Cities (TRI)
- Seattle to Asheville (SEA-AVL): Asheville Regional Airport (AVL) is located approximately 72 miles from Tri-Cities Regional Airport (TRI). On this route, one-way economy fares generally range from $155 to $540, influenced by the season and advance booking. Typically, this route features one-stop flights, with common layover points being Charlotte-Douglas International Airport (CLT) and O'Hare International Airport (ORD). Major airlines operating on this route include American Airlines and United, and first-class service is also offered.
How to find the best prices for flights from Seattle (SEA) to Tri-Cities (TRI)
Getting some of the best deals on flights from Seattle to Tri-Cities is all about timing and flexibility. Here are some key tips to help you save:
- Best times to book and fly: cheaper fares are typically found when booking 2 to 8 weeks in advance, which coincides with when most travelers make their reservations. Departures in the afternoon (12 PM to 6 PM) tend to be more affordable, although morning flights (5 AM to 12 PM) are the most popular. Additionally, flying on Tuesday usually offers lower prices, while Thursday remains the busiest travel day.
- Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
- Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.* Find Tri-Cities hotel and flight deals.
- Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
- Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
- Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.
*Members only. Savings vary and are not available on all bundles. Select hotels.
Arriving at Tri-Cities Regional Airport from Seattle - Tacoma International Airport
Tri-Cities welcomes travelers from Seattle with a range of transport options based on price, convenience, and proximity. For departures, Seattle - Tacoma International Airport is roughly a 20-minute drive (covering about 14 miles) from central Seattle. Here's how to reach Tri-Cities efficiently:
- Hotel transfer: Transfers offer a convenient way to reach your hotel in Tri-Cities, with options including free hotel shuttles and private rides, which can be arranged in advance with your hotel.
- Car rental: Renting a car from Tri-Cities Regional Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Tri-Cities Regional Airport on Expedia.
- Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
- Public transportation: From Tri-Cities Regional Airport, Tri-City Airport Seaport, a seaport, is located about 0.2 miles away on foot, making it easily accessible for travelers.
Seattle to Tri-Cities Flights
The cheapest times to fly from Seattle to Tri-Cities
On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Tri-Cities are during the month of October. You can find some of the cheapest flights from Seattle to Tri-Cities with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Seattle to Tri-Cities
Sunday is one of the best days to book for cheap flights from Seattle to Tri-Cities: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.
How to find cheap round-trip tickets from Seattle to Tri-Cities
Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Tri-Cities in 2026. You can also book with separate airlines for your outbound and return journeys, from $372 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.
Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Tri-Cities flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.
You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Tri-Cities airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.
*Terms apply.
Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.
Frequently Asked Questions
How much does a flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) cost?
You can find cheap one-way flights from $372 and cheap return flights $379 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) with Expedia. One-way flights generally range between $272 and $954, and roundtrip flights usually range from $561 to $1833. 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 the cheapest fares first, and use the Price Tracking tool to receive alerts when Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) ticket fares go up or down.
*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The cheapest month to fly from SEA to TRI is October 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're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
Enter SEA to TRI and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
American Airlines is one of the cheapest airlines offering connecting flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional), with round-trip tickets starting from around $314. 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.
*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
To find a cheap flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional), 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
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.
What is the earliest flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The earliest flight from Seattle (SEA) to Tri-Cities (TRI) typically leaves at around 12:05 AM, operated by American Airlines. This is a seasonal service active in July, allowing you to get an early start on your trip. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
The most popular departure times for flights from Seattle (SEA) to Tri-Cities (TRI) are in the late evening, from 9pm to midnight. About 27% of passengers prefer this time window. Many major carriers, including Delta Air Lines, American Airlines, and United Airlines, offer flights during this window. This timing is popular because it allows you to finish your day in Seattle before heading to Tri-Cities.
How long does it take to fly from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
Flying from SEA to TRI with a connection usually takes about 7 hours 30 minutes, traveling roughly 2,157 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
You can fly first class between SEA and TRI. First class cabins are available on:
- American Airlines
- Delta Air Lines
- United Airlines
How do I earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight with Expedia?
It's easy to earn miles on a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) 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 Tri-Cities from Seattle - Tacoma Intl. (SEA)?
If you're planning to travel to Tri-Cities from Seattle - Tacoma Intl. (SEA), you can fly into Tri-Cities Regional (TRI) Some flights may connect through major hubs like O'Hare Intl. (ORD), San Francisco Intl. (SFO), George Bush Intercontinental (IAH) before reaching Tri-Cities. 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) at the last minute?
Typically, booking a last minute flight from Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) flight and hotel package?
Securing a Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) 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 Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional)?
If you booked your Seattle, WA (SEA-Seattle - Tacoma Intl.) to Tri-Cities, TN (TRI-Tri-Cities Regional) 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 | Seattle-Tacoma International Airport |
|---|---|
Destination airport | Tri-Cities, TN |
Distance | 2,157 miles away |
Airlines serving | American Airlines, Delta |
Popular airline | American Airlines |
Roundtrip price | $379 |