$229 Cheap Delta flights Seattle (SEA) to Tri-Cities (TRI)

You can discover cheap round-trip Delta Air Lines flights from $445 from SEA to TRI by sorting your results from “Price (lowest to highest)” on Expedia. Or look for deals from $229 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

Delta Air Lines flights to Blountville are generally cheaper in the low-season months of January and February. Whether you’re after a one-way or a return ticket, you could land a better deal then.

Begin your search one to three months ahead of your departure date to score cheap fares on Delta Air Lines flights from Seattle - Tacoma Intl. Airport (SEA) to Tri-Cities Regional Airport (TRI). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also reduce costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic flights.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC’s global airline sales database.

To figure out if there’s a direct journey from SEA to TRI with Delta Air Lines or other carriers, check the “Nonstop” filter when searching for flights.

Browse Delta Air Lines’s earliest flights from SEA to TRI by selecting the “Morning” and “Early Morning” filters. Not only will you get to your destination sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.

Hop on a Delta Air Lines flight from Seattle - Tacoma Intl. Airport (SEA) to Blountville, and you’ll likely land at Tri-Cities Regional Airport (TRI). This is the airline’s primary hub in this destination.

Delta Air Lines makes flying from SEA to TRI more enjoyable with a rewarding loyalty program and an excellent in-flight experience. You could even start collecting points with Delta SkyMiles. Be sure to sign up to Expedia’s free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future travel.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

It’s generally possible to cancel or reschedule your flight, although additional charges may apply if you made your booking more than 24 hours ago. Need to keep your options open? Make use of Expedia’s “Changes included” or “No cancel fee” filter to find flights that won’t charge extra if you need to adjust your plans. To modify your itinerary, visit “Trips,” select your flight and click on “Manage Booking” for more information.