Southwest® flights from Washington, D.C. (Dulles) to Denver from $109

Promo Code

Low fares from Washington, D.C. (Dulles) to Denver

$

Washington, D.C. (Dulles) (IAD)to

Denver (DEN)
Depart: 04/29/2026

One-way

Basic

From
$109
Seen: 20 hrs ago

Washington, D.C. (Dulles) (IAD)to

Denver (DEN)
Depart: 04/21/2026

One-way

Basic

From
$109
Seen: 19 hrs ago

Washington, D.C. (Dulles) (IAD)to

Denver (DEN)
Depart: 04/18/2026

One-way

Basic

From
$109
Seen: 3 hrs ago

Washington, D.C. (Dulles) (IAD)to

Denver (DEN)
Depart: 05/02/2026

One-way

Basic

From
$109
Seen: 5 hrs ago

Washington, D.C. (Dulles) (IAD)to

Denver (DEN)
Depart: 05/05/2026

One-way

Basic

From
$109
Seen: 23 hrs ago

Washington, D.C. (Dulles) (IAD)to

Denver (DEN)
Depart: 04/22/2026

One-way

Basic

From
$109
Seen: 20 hrs ago

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Explore flights from Washington, D.C. (Dulles) to Denver

Mar 2026
From$209*
Seen: 19 minutes ago
One Way/Basic
Apr 2026
From$109*
Seen: 20 hrs ago
One Way/Basic
May 2026
From$109*
Seen: 5 hrs ago
One Way/Basic
$149
$496
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    • Range$149-$496

    *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:
    Dulles International Airport
    Arriving at:
    Denver International Airport
    Average flight time:
    3 hours 52 minutes
    Distance:
    1452 miles

    Route Information

    18† Weekly flights
    • 2‡ Nonstop flights 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 Washington, D.C. (Dulles) to Denver is 3 hours 52 minutes.
    There are 18 weekly flights from Washington, D.C. (Dulles) to Denver on Southwest Airlines.
    Yes, Southwest flies nonstop from Washington, D.C. (Dulles) to Denver 2 times per day from Monday through Friday.
    Yes, Southwest flies nonstop from Washington, D.C. (Dulles) to Denver once per day on Saturdays and Sundays.
    To find the lowest fares by day and time to fly Washington, D.C. (Dulles) 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 Washington, D.C. (Dulles) 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.

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