Southwest® flights from Buffalo/Niagara Falls to Denver from $181

Promo Code

Low fares from Buffalo/Niagara Falls to Denver

$

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 09/26/2026

One-way

Basic

From
$181
Seen: 10 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 09/06/2026

One-way

Basic

From
$181
Seen: 1 hour ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 11/07/2026

One-way

Basic

From
$181
Seen: 17 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 10/06/2026

One-way

Basic

From
$181
Seen: 17 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 10/29/2026

One-way

Basic

From
$181
Seen: 18 hrs ago

Buffalo/Niagara Falls (BUF)to

Denver (DEN)
Depart: 09/05/2026

One-way

Basic

From
$181
Seen: 3 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 Buffalo/Niagara Falls to Denver

Try alternate month or interact with individual days below in order to find offers.
Jul 2026
No result for this month.
Aug 2026
From$194*
Seen: 2 hrs ago
One Way/Basic
Sep 2026
From$181*
Seen: 3 hrs ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $194
cmp-daily-histogram-bars-legend-max-price-aria-label $574
Displaying fares for July-2026
  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    31

    Fri

    JUL

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    01

    Sat

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    02

    Sun

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    03

    Mon

  • BUF–DEN, 08/04/2026: From $574
    04

    Tue

  • BUF–DEN, 08/05/2026: From $484
    05

    Wed

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

    Thu

  • BUF–DEN, 08/07/2026: From $484
    07

    Fri

  • BUF–DEN, 08/08/2026: From $474
    08

    Sat

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    09

    Sun

  • BUF–DEN, 08/10/2026: From $474
    10

    Mon

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    11

    Tue

  • BUF–DEN, 08/12/2026: From $474
    12

    Wed

  • BUF–DEN, 08/13/2026: From $474
    13

    Thu

  • BUF–DEN, 08/14/2026: From $288
    14

    Fri

  • BUF–DEN, 08/15/2026: From $288
    15

    Sat

  • BUF–DEN, 08/16/2026: From $309
    16

    Sun

  • BUF–DEN, 08/17/2026: From $298
    17

    Mon

  • BUF–DEN, 08/18/2026: From $288
    18

    Tue

  • BUF–DEN, 08/19/2026: From $288
    19

    Wed

  • BUF–DEN, 08/20/2026: From $298
    20

    Thu

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

    Fri

  • BUF–DEN, 08/22/2026: From $209
    22

    Sat

  • BUF–DEN, 08/23/2026: From $260
    23

    Sun

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    24

    Mon

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    25

    Tue

  • BUF–DEN, 08/26/2026: From $194
    26

    Wed

  • BUF–DEN: cmp-view-offers-disclaimer. Find Offers
    27

    Thu

  • BUF–DEN, 08/28/2026: From $226
    28

    Fri

  • BUF–DEN, 08/29/2026: From $194
    29

    Sat

  • BUF–DEN, 08/30/2026: From $247
    30

    Sun

    • Range$194-$574

    *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:
    Denver International Airport
    Average flight time:
    3 hours 39 minutes
    Distance:
    1359 miles

    Route Information

    156† 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 Buffalo/Niagara Falls to Denver is 3 hours 39 minutes.
    There are 156 weekly flights from Buffalo/Niagara Falls to Denver on Southwest Airlines.
    Yes, Southwest flies nonstop from Buffalo/Niagara Falls to Denver once per day from Monday through Friday.
    Yes, Southwest flies nonstop from Buffalo/Niagara Falls to Denver once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Buffalo/Niagara Falls to Denver with Southwest, check out our Low Fare Calendar.
    You can rent a car at Denver International Airport book yours with your flight.
    Yes! Flights from Buffalo/Niagara Falls to Denver—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.

    Explore Flights from Other Popular Origins

    Popular Flights from Buffalo/Niagara Falls