Southwest® flights from Buffalo/Niagara Falls to Seattle/Tacoma from $169

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Low fares from Buffalo/Niagara Falls to Seattle/Tacoma

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Buffalo/Niagara Falls (BUF)to

Seattle/Tacoma (SEA)
Depart: 09/26/2026

One-way

Basic

From
$169
Seen: 19 hrs ago

Buffalo/Niagara Falls (BUF)to

Seattle/Tacoma (SEA)
Depart: 11/04/2026

One-way

Basic

From
$169
Seen: 7 hrs ago

Buffalo/Niagara Falls (BUF)to

Seattle/Tacoma (SEA)
Depart: 09/22/2026

One-way

Basic

From
$169
Seen: 17 hrs ago

Buffalo/Niagara Falls (BUF)to

Seattle/Tacoma (SEA)
Depart: 09/16/2026

One-way

Basic

From
$169
Seen: 11 hrs ago

Buffalo/Niagara Falls (BUF)to

Seattle/Tacoma (SEA)
Depart: 10/21/2026

One-way

Basic

From
$169
Seen: 8 hrs ago

Buffalo/Niagara Falls (BUF)to

Seattle/Tacoma (SEA)
Depart: 09/11/2026

One-way

Basic

From
$169
Seen: 18 hrs ago

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Explore flights from Buffalo/Niagara Falls to Seattle/Tacoma

Aug 2026
From$365*
Seen: 15 hrs ago
One Way/Basic
Sep 2026
From$169*
Seen: 17 hrs ago
One Way/Basic
Oct 2026
From$169*
Seen: 8 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $169
Displaying fares for August-2026
  • BUF–SEA, 08/22/2026: From $365
    22

    Sat

    AUG

  • BUF–SEA, 08/23/2026: From $397
    23

    Sun

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    24

    Mon

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    25

    Tue

  • BUF–SEA, 08/26/2026: From $365
    26

    Wed

  • BUF–SEA, 08/27/2026: From $380
    27

    Thu

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    28

    Fri

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    29

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    30

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    31

    Mon

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    01

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    SEP

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    02

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    03

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    04

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    05

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    06

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    07

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    08

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    09

    Wed

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    10

    Thu

  • BUF–SEA, 09/11/2026: From $169
    11

    Fri

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    12

    Sat

  • BUF–SEA, 09/13/2026: From $329
    13

    Sun

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    14

    Mon

  • BUF–SEA: cmp-view-offers-disclaimer. Find Offers
    15

    Tue

  • BUF–SEA, 09/16/2026: From $169
    16

    Wed

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    17

    Thu

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    18

    Fri

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    19

    Sat

  • BUF–SEA, 09/20/2026: From $350
    20

    Sun

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    21

    Mon

    • Range$169-$397

    *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:
    Buffalo Niagara International Airport
    Arriving at:
    Seattle/Tacoma International Airport
    Distance:
    2122 miles

    Route Information

    68† 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 68 weekly flights from Buffalo/Niagara Falls to Seattle/Tacoma on Southwest Airlines.
    To find the lowest fares by day and time to fly Buffalo/Niagara Falls 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 Buffalo/Niagara Falls 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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