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

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.

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.

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.

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.