$119 Cheap Delta flights Washington (IAD) to Denver (DEN)

View $119 flight on Tue, Sep 9, 2025Opens in a new window

$119 Cheap Delta flights Washington (IAD) to Denver (DEN)

Prices were available within the past 7 days and start at $119 for one-way flights and $207 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Sep 9 - Wed, Sep 10
IAD
Washington
DEN
Denver
$207 Roundtrip, just found
$207
Roundtrip
just found
Select Delta flight, departing Tue, Sep 9 from Washington to Denver, returning Wed, Sep 10, priced at $207 just found
Delta
Fri, Aug 15 - Sat, Aug 23
IAD
Washington
DEN
Denver
$212 Roundtrip, found 7 hours ago
$212
Roundtrip
found 7 hours ago
Select Delta flight, departing Fri, Aug 15 from Washington to Denver, returning Sat, Aug 23, priced at $212 found 7 hours ago
Delta
Sun, Aug 17 - Mon, Aug 25
IAD
Washington
DEN
Denver
$213 Roundtrip, found 7 hours ago
$213
Roundtrip
found 7 hours ago
Select Delta flight, departing Sun, Aug 17 from Washington to Denver, returning Mon, Aug 25, priced at $213 found 7 hours ago
Delta
Tue, Aug 12 - Fri, Aug 22
IAD
Washington
DEN
Denver
$219 Roundtrip, found 3 hours ago
$219
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Aug 12 from Washington to Denver, returning Fri, Aug 22, priced at $219 found 3 hours ago
Delta
Thu, Aug 14 - Sun, Aug 24
IAD
Washington
DEN
Denver
$221 Roundtrip, found 3 hours ago
$221
Roundtrip
found 3 hours ago
Select Delta flight, departing Thu, Aug 14 from Washington to Denver, returning Sun, Aug 24, priced at $221 found 3 hours ago
Delta
Mon, Sep 15 - Tue, Sep 16
IAD
Washington
DEN
Denver
$231 Roundtrip, just found
$231
Roundtrip
just found
Select Delta flight, departing Mon, Sep 15 from Washington to Denver, returning Tue, Sep 16, priced at $231 just found
Flights from Washington (IAD) to Denver (DEN)
Origin airport
Washington Dulles Intl.
Destination airport
Denver Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Southwest Airlines, Sun Country Airlines, United
Popular airline
United
Distance
1449 mi
Average flight time
1 hour 51 mins

Frequently asked questions

How much is a Delta Air Lines flight from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN)?
You'll discover cheap return Delta Air Lines flights from $207 from IAD to DEN by organizing your results from "Price (lowest to highest)" on Expedia. Or look for deals from $119 for a one-way journey.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to DEN with Delta Air Lines?
Delta Air Lines flights to Denver tend to be more affordable in the low-season months of January and November. Whether you're in search of a one-way or a return ticket, you could find a better deal then.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN) with Delta Air Lines?
Begin your search one to three months ahead of your departure date to get cheaper fares on Delta Air Lines flights from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN). You can save 25% by booking your domestic flight 34 to 86 days in advance versus last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it's 6% cheaper on average than a Monday, the most expensive day to book.* Get your timing spot on, and you can enjoy significant savings on domestic journeys.*Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Delta Air Lines fly nonstop from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN)?
Click on the "Nonstop" filter when browsing for direct Delta Air Lines flights from IAD to DEN. It's also an easy way to compare other carriers offering the same direct route.
What is the earliest Delta Air Lines flight from IAD to DEN?
Search Delta Air Lines's earliest flights from IAD to DEN by using the "Early Morning" and "Morning" filters. Not only will you arrive at your destination sooner, early departures also experience 20% fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Delta Air Lines fly into in Denver?
Denver Intl. Airport (DEN) is the main Denver hub for Delta Air Lines flights from Washington Dulles Intl. Airport (IAD).
Why fly with Delta Air Lines from IAD to DEN?
Delta Air Lines makes traveling from IAD to DEN more comfortable with an excellent in-flight experience and a rewarding loyalty program. You also have the chance to earn points with Delta SkyMiles. Be sure to sign up to our free One Key™ rewards program to earn OneKeyCash™*, which can be redeemed on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Delta Air Lines flight from Washington Dulles Intl. Airport (IAD) to Denver Intl. Airport (DEN)?
Depending on the type of fare you purchased, a fee typically applies if you cancel or reschedule your flight more than 24 hours after confirmation. To secure flexible plane tickets, select our "Changes included" and "No cancel fee" boxes while searching for flights. For additional information on canceling or changing your reservation, go to "Trips," select your flight and click on "Manage Booking."

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*Available to One Key members.