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

View $119 flight on Tue, Oct 28, 2025Opens in a new window

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

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
Fri, Sep 19 - Mon, Sep 29
DEN
Denver
IAD
Washington
$207 Roundtrip, found 2 hours ago
$207
Roundtrip
found 2 hours ago
Select Delta flight, departing Fri, Sep 19 from Denver to Washington, returning Mon, Sep 29, priced at $207 found 2 hours ago
Delta
Thu, Sep 4 - Sun, Sep 14
DEN
Denver
IAD
Washington
$218 Roundtrip, found 2 hours ago
$218
Roundtrip
found 2 hours ago
Select Delta flight, departing Thu, Sep 4 from Denver to Washington, returning Sun, Sep 14, priced at $218 found 2 hours ago
Delta
Tue, Aug 12 - Fri, Aug 22
DEN
Denver
IAD
Washington
$219 Roundtrip, found 2 hours ago
$219
Roundtrip
found 2 hours ago
Select Delta flight, departing Tue, Aug 12 from Denver to Washington, returning Fri, Aug 22, priced at $219 found 2 hours ago
Delta
Fri, Sep 19 - Mon, Sep 29
DEN
Denver
IAD
Washington
$237 Roundtrip, found 2 hours ago
$237
Roundtrip
found 2 hours ago
Select Delta flight, departing Fri, Sep 19 from Denver to Washington, returning Mon, Sep 29, priced at $237 found 2 hours ago
Flights from Denver (DEN) to Washington (IAD)
Origin airport
Denver Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Southwest Airlines, Sun Country Airlines, United
Popular airline
Southwest Airlines
Distance
1449 mi
Average flight time
5 hours 24 mins

Frequently asked questions

How much is a Delta Air Lines flight from Denver Intl. Airport (DEN) to Washington Dulles Intl. Airport (IAD)?
You can discover budget-friendly return Delta Air Lines flights from $207 from DEN to IAD by filtering your results from "Price (lowest to highest)" on Expedia. Or look for deals from $119 for a one-way trip.**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 DEN to IAD with Delta Air Lines?
Delta Air Lines flights to Washington tend to be cheaper in the quieter months of January and February. Whether you're after a one-way or round-trip ticket, you could find a better deal then.
What is the cheapest time to book flights from Denver Intl. Airport (DEN) to Washington Dulles Intl. Airport (IAD) with Delta Air Lines?
To find cheap Delta Air Lines fares from Denver Intl. Airport (DEN) to Washington Dulles Intl. Airport (IAD), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also affect what you pay. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight on a Sunday.**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 Denver Intl. Airport (DEN) to Washington Dulles Intl. Airport (IAD)?
Click on our "Nonstop" filter when looking for direct Delta Air Lines flights from DEN to IAD. You'll also be able to compare other airlines offering the same nonstop trip.
What is the earliest Delta Air Lines flight from DEN to IAD?
Sort your results by "Early Morning" and "Morning" to find the earliest flights from DEN to IAD. Heading off early means you're 20% less likely to experience 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 Washington?
Catch a Delta Air Lines flight from Denver Intl. Airport (DEN) to Washington, and you'll most likely arrive at Washington Dulles Intl. Airport (IAD). This is the airline's main hub in this city.
Why fly with Delta Air Lines from DEN to IAD?
Taking off from DEN to IAD with Delta Air Lines comes with plenty of perks, including an excellent in-flight experience and a rewarding loyalty program. Plus, when booking through Expedia, One Key™ members can collect OneKeyCash™* to spend on select future travel purchases. That's on top of the Delta SkyMiles points you can earn with Delta Air Lines.*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 Denver Intl. Airport (DEN) to Washington Dulles Intl. Airport (IAD)?
It's usually possible to cancel or change your flight, although there may be additional charges if your booking was made over 24 hours ago. Need flexible options? Use our "Changes included" and "No cancel fee" filters to find flights that won't charge extra if you need to revise your plans. To update your itinerary, visit "Trips," select your flight and click on "Manage Booking" for further information.

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*Available to One Key members.