Cheap Flights From Denver Intl. (DEN) To Washington Dulles Intl. (IAD)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Cheapest Flights from Denver (DEN) to Washington (IAD)

The cheapest flights to Washington Dulles Intl. found within the past 7 days were round trip and CA $240 one way. Prices and availability subject to change. Additional terms may apply.

Frequently asked questions

Are there direct flights from DEN to Washington Dulles Intl. Airport (IAD)?
If you want to journey from DEN to Washington Dulles Intl. Airport (IAD) as quickly as possible, you'll be pleased to know multiple airlines offer nonstop flights. Choose your favorite seat with United Airlines or Southwest Airlines.
What airlines fly from Denver Intl. Airport (DEN) to Dulles Intl. Airport?
If you're heading to Sterling from Denver, there are a few airlines that have direct flights. One of the top carriers is United Airlines (UA), which offers 199 flights on this route every month. You'll want to also browse the deals on offer from Southwest Airlines (WN). This airline operates 47 flights monthly on the Denver to Sterling route. Be sure to compare the two airlines to pick up the best fare.
What is the best day to buy a plane ticket?
Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you're looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you're browsing flight deals.
What are the cheapest days to fly?
Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.
How far in advance can you book a flight?
Here's the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.

Popular Flight Routes from Denver (DEN)

Travelers at DEN love to visit these top cities. Roam to the top destinations from Denver (DEN) today with the cheap prices from Travelocity!

Popular Flight Routes from Washington (IAD)

Travelers at IAD love to visit these top cities. Roam to the top destinations from Washington(IAD) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.