Southwest® flights from Knoxville to Seattle/Tacoma from $253

Promo Code

Low fares from Knoxville to Seattle/Tacoma

$

Knoxville (TYS)to

Seattle/Tacoma (SEA)
Depart: 08/11/2026

One-way

Basic

From
$193

Low fares from Knoxville to Seattle/Tacoma

$

Knoxville (TYS)to

Seattle/Tacoma (SEA)
Depart: 04/29/2026

One-way

Basic

From
$253
Seen: 23 hrs ago

Knoxville (TYS)to

Seattle/Tacoma (SEA)
Depart: 05/02/2026

One-way

Basic

From
$289
Seen: 2 hrs ago

Knoxville (TYS)to

Seattle/Tacoma (SEA)
Depart: 04/29/2026

One-way

Choice

From
$298
Seen: 23 hrs ago

Knoxville (TYS)to

Seattle/Tacoma (SEA)
Depart: 04/28/2026

One-way

Basic

From
$317
Seen: 1 hour ago

Knoxville (TYS)to

Seattle/Tacoma (SEA)
Depart: 04/22/2026

One-way

Basic

From
$317
Seen: 6 hrs ago

Knoxville (TYS)to

Seattle/Tacoma (SEA)
Depart: 07/02/2026

One-way

Basic

From
$319
Seen: 22 hrs ago

Looking for more low-fare flights?

Check out the Low Fare Calendar to find a fare that works for you. Just choose the month you want to depart and return, and we’ll show you the best fares available.

Find low fares

Explore flights from Knoxville to Seattle/Tacoma

Apr 2026
From$253*
Seen: 23 hrs ago
One Way/Basic
May 2026
From$289*
Seen: 2 hrs ago
One Way/Basic
Jun 2026
From$360*
Seen: 18 hrs ago
One Way/Basic
$253
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    • Range$253-$459

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Mc Ghee Tyson Airport
    Arriving at:
    Seattle/Tacoma International Airport
    Distance:
    2114 miles

    Route Information

    30† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    There are 30 weekly flights from Knoxville to Seattle/Tacoma on Southwest Airlines.
    To find the lowest fares by day and time to fly Knoxville to Seattle/Tacoma with Southwest, check out our Low Fare Calendar.
    You can rent a car at Seattle/Tacoma International Airport book yours with your flight.
    Yes! Flights from Knoxville to Seattle/Tacoma—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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