Southwest® flights from Denver to Buffalo/Niagara Falls from $189

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Low fares from Denver to Buffalo/Niagara Falls

$

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 11/05/2026

One-way

Basic

From
$189
Seen: 14 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 11/16/2026

One-way

Basic

From
$189
Seen: 1 hour ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 12/15/2026

One-way

Basic

From
$189
Seen: 15 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 10/24/2026

One-way

Basic

From
$189
Seen: 19 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 11/07/2026

One-way

Basic

From
$189
Seen: 5 hrs ago

Denver (DEN)to

Buffalo/Niagara Falls (BUF)
Depart: 10/14/2026

One-way

Basic

From
$199
Seen: 18 hrs ago

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Explore flights from Denver to Buffalo/Niagara Falls

Sep 2026
From$298*
Seen: 22 hrs ago
One Way/Basic
Oct 2026
From$189*
Seen: 19 hrs ago
One Way/Basic
Nov 2026
From$189*
Seen: 5 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $199
cmp-daily-histogram-bars-legend-max-price-aria-label $584
Displaying fares for September-2026
  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    11

    Fri

    SEP

  • DEN–BUF, 09/12/2026: From $584
    12

    Sat

  • DEN–BUF, 09/13/2026: From $584
    13

    Sun

  • DEN–BUF, 09/14/2026: From $584
    14

    Mon

  • DEN–BUF, 09/15/2026: From $584
    15

    Tue

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    16

    Wed

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    17

    Thu

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    18

    Fri

  • DEN–BUF, 09/19/2026: From $484
    19

    Sat

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    20

    Sun

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    21

    Mon

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    22

    Tue

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    23

    Wed

  • DEN–BUF, 09/24/2026: From $313
    24

    Thu

  • DEN–BUF, 09/25/2026: From $323
    25

    Fri

  • DEN–BUF, 09/26/2026: From $298
    26

    Sat

  • DEN–BUF, 09/27/2026: From $308
    27

    Sun

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    28

    Mon

  • DEN–BUF, 09/29/2026: From $298
    29

    Tue

  • DEN–BUF, 09/30/2026: From $308
    30

    Wed

  • DEN–BUF, 10/01/2026: From $214
    01

    Thu

    OCT

  • DEN–BUF, 10/02/2026: From $236
    02

    Fri

  • DEN–BUF, 10/03/2026: From $204
    03

    Sat

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    04

    Sun

  • DEN–BUF, 10/05/2026: From $199
    05

    Mon

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    06

    Tue

  • DEN–BUF: cmp-view-offers-disclaimer. Find Offers
    07

    Wed

  • DEN–BUF, 10/08/2026: From $281
    08

    Thu

  • DEN–BUF, 10/09/2026: From $241
    09

    Fri

  • DEN–BUF, 10/10/2026: From $241
    10

    Sat

    • Range$199-$584

    *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:
    Denver International Airport
    Arriving at:
    Buffalo Niagara International Airport
    Average flight time:
    3 hours 3 minutes
    Distance:
    1359 miles

    Route Information

    138† Weekly flights
    • 1‡ Nonstop flight per day Monday through Friday
    • 1‡ Nonstop flight on Saturday
    • 1‡ Nonstop flight on Sunday

    † 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

    The average flight time from Denver to Buffalo/Niagara Falls is 3 hours 3 minutes.
    There are 138 weekly flights from Denver to Buffalo/Niagara Falls on Southwest Airlines.
    Yes, Southwest flies nonstop from Denver to Buffalo/Niagara Falls once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Denver to Buffalo/Niagara Falls once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Denver to Buffalo/Niagara Falls with Southwest, check out our Low Fare Calendar.
    You can rent a car at Buffalo Niagara International Airport book yours with your flight.
    Yes! Flights from Denver to Buffalo/Niagara Falls—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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