Cheap flights from Denver International to Washington Dulles

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Compare Denver International to Washington Dulles flight deals

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Flight deals from Denver International to Washington Dulles

Looking for a cheap last-minute deal or the best round-trip flight from Denver International Airport to Washington Dulles Airport? If you want to travel next month, round-trip fares start from $196. Find the lowest prices on one-way and round-trip tickets right here.

Washington, D.C..$150 per passenger.Departing Wed, Nov 4, returning Sat, Nov 7.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Wed, Nov 4, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Sat, Nov 7, arriving in Denver International.Price includes taxes and charges.From $150, select.

Washington, D.C..$150 per passenger.Departing Wed, Oct 21, returning Sat, Nov 7.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Wed, Oct 21, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Sat, Nov 7, arriving in Denver International.Price includes taxes and charges.From $150, select.

Washington, D.C..$195 per passenger.Departing Wed, Oct 14, returning Wed, Oct 21.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Wed, Oct 14, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Wed, Oct 21, arriving in Denver International.Price includes taxes and charges.From $195, select.

Washington, D.C..$235 per passenger.Departing Tue, Nov 24, returning Tue, Dec 1.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Tue, Nov 24, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Tue, Dec 1, arriving in Denver International.Price includes taxes and charges.From $235, select.

Washington, D.C..$243 per passenger.Departing Wed, Dec 9, returning Sat, Dec 12.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Wed, Dec 9, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Sat, Dec 12, arriving in Denver International.Price includes taxes and charges.From $243, select.

Washington, D.C..$258 per passenger.Departing Mon, Sep 28, returning Wed, Sep 30.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Mon, Sep 28, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Wed, Sep 30, arriving in Denver International.Price includes taxes and charges.From $258, select.

Washington, D.C..$258 per passenger.Departing Mon, Sep 28, returning Sun, Oct 4.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Denver International on Mon, Sep 28, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Sun, Oct 4, arriving in Denver International.Price includes taxes and charges.From $258, select.

Washington, D.C..$290 per passenger.Departing Thu, Oct 29, returning Wed, Dec 2.Round-trip flight with Allegiant Air and Frontier Airlines.Outbound indirect flight with Allegiant Air, departing from Denver International on Thu, Oct 29, arriving in Washington Dulles.Inbound indirect flight with Frontier Airlines, departing from Washington Dulles on Wed, Dec 2, arriving in Denver International.Price includes taxes and charges.From $290, select.

Washington, D.C..$331 per passenger.Departing Sat, Oct 10, returning Sun, Oct 11.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Sat, Oct 10, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Sun, Oct 11, arriving in Denver International.Price includes taxes and charges.From $331, select.

Washington, D.C..$336 per passenger.Departing Wed, Mar 3, returning Sun, Mar 7.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Wed, Mar 3, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Sun, Mar 7, arriving in Denver International.Price includes taxes and charges.From $336, select.

Washington, D.C..$336 per passenger.Departing Fri, Apr 9, returning Fri, Apr 23.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Fri, Apr 9, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Fri, Apr 23, arriving in Denver International.Price includes taxes and charges.From $336, select.

Washington, D.C..$336 per passenger.Departing Thu, Dec 10, returning Sun, Dec 13.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Thu, Dec 10, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Sun, Dec 13, arriving in Denver International.Price includes taxes and charges.From $336, select.

Washington, D.C..$336 per passenger.Departing Thu, Feb 11, returning Wed, Mar 3.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Thu, Feb 11, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Wed, Mar 3, arriving in Denver International.Price includes taxes and charges.From $336, select.

Washington, D.C..$336 per passenger.Departing Fri, Dec 4, returning Wed, Jan 6.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Fri, Dec 4, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Wed, Jan 6, arriving in Denver International.Price includes taxes and charges.From $336, select.

Washington, D.C..$336 per passenger.Departing Sat, Oct 10, returning Wed, Nov 18.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Sat, Oct 10, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Wed, Nov 18, arriving in Denver International.Price includes taxes and charges.From $336, select.

Washington, D.C..$336 per passenger.Departing Fri, Jan 8, returning Fri, Jan 22.Round-trip flight with United.Outbound direct flight with United departing from Denver International on Fri, Jan 8, arriving in Washington Dulles.Inbound direct flight with United departing from Washington Dulles on Fri, Jan 22, arriving in Denver International.Price includes taxes and charges.From $336, select.

Find the cheapest month to fly from Denver International to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Denver International to Washington Dulles flights are currently cheapest in November.

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Direct flights from Denver International to Washington Dulles

Denver International to Washington Dulles: Alternative routes

Compare routes from Denver International to Washington, D.C. below. You may find an airport to fly into that's cheaper, faster, or easier than Washington Dulles.

Denver to Washington, D.C.: Flight information

The things to know before you go.

Cheapest flight found	$150
Cheapest month to fly	November
Average flight time	3 hrs, 22 mins
Most popular airline	United
Average flights per week	193

Finding cheap flights from Denver International to Washington Dulles: Frequently asked questions

How much are round-trip flights from Denver International to Washington Dulles?

The best price we found for a round-trip flight from Denver International to Washington Dulles is $150. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Denver International to Washington Dulles?

3 hours and 22 minutes is the average flight time from Denver International to Washington Dulles.

Which airlines fly direct from Denver International to Washington Dulles?

United, Copa and Brussels Airlines fly direct from Denver International to Washington Dulles.

How many flights are there a week from Denver International to Washington Dulles?

There are 193 flights per week flying from Denver International to Washington Dulles, as of September 2026.

When is the cheapest time to fly from Denver International to Washington Dulles?

The cheapest month to fly from Denver International to Washington Dulles is usually November.

Which upcoming date is cheapest to fly from Denver International Airport to Washington Dulles Airport on?

After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Denver International Airport to Washington Dulles Airport on Wednesday, November 4, 2026.

Can I get a direct flight from Denver International Airport to Washington Dulles Airport?

Yes – the average flight time is 3 hours and 22 minutes.

How can I find the best flight deal to Washington Dulles?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Washington, D.C.?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Washington, D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

Which is the cheapest airline to fly with from Denver International Airport to Washington Dulles?

Currently, Frontier Airlines and United offer the cheapest flight tickets to Washington Dulles.

Traveling from Denver International Airport (DEN) to Washington Dulles Airport (IAD): what you need to know

Book a direct flight from Denver International Airport to Washington Dulles Airport and you'll be traveling for an average of 3 hours 25 minutes.
Washington DC's timezone is UTC-5, making Washington DC two hours ahead of Denver.
Every week, there are 64 Denver International Airport to Washington Dulles Airport flights. To jet off as early as possible, jump on the 06:00 United Airlines flight. If you're eager to make the most of your day before you fly, the last departure is at 23:59 with United Airlines.
Arriving two hours before an international flight and one hour ahead of a domestic departure are golden rules for hassle-free flying. Get to the airport on time to board your DEN to IAD flight.
Be prepared for longer queues in popular months such as July. Arriving up to four hours ahead of international flights and two hours for a domestic departure will help ensure a smooth travel experience.
United is your gateway to discovering Washington DC (and perhaps some other great corners of the United States!). Browse the direct flights from Denver International Airport to Washington Dulles Airport offered by this popular airline.
Most passengers choose to fly with United on this route.
United leads the way as the most punctual carrier for DEN to IAD flights, with 89.02% of services arriving on schedule.
Think about adding a stopover when booking your ticket from Denver International Airport to Washington Dulles Airport. Simply deselect 'Direct flights only' to break up your journey, or perhaps explore a new destination along the way. Here's where you can stop between DEN and IAD:
- Detroit Wayne County Airport
- Pittsburgh International Airport
- Kansas City International Airport

How to find the cheapest flights from Denver International Airport (DEN) to Washington Dulles Airport (IAD)

Right now, $93 is the cheapest price we've seen for a one-way Denver International Airport to Washington Dulles Airport flight. The best price for a return plane ticket is $150. Remember that fares may change due to demand at the time of booking.
Book 11 months before you travel. After looking at the numbers on our calendar, this is how far you should book ahead to find cheap tickets from DEN to IAD.
April is the cheapest month for flights from Denver International Airport to Washington Dulles Airport. If you'd like to travel at a different time of year, the 'Whole month' tool will give you the lowest prices across every month.
Picking up cheap flights from DEN to IAD is a cinch with Price Alerts. Simply set up one of these automatic alerts and we'll let you know as soon as a new discounted fare appears.
Choose your preferred departure and arrival times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Denver International Airport to Washington Dulles Airport.

Handy information about Denver International Airport (DEN)

You'll find DEN at 8500 Pena Boulevard.
80% of flights leaving Denver International Airport land at their destination on time. With its strong performance rating, disruptions are unlikely when taking off from DEN.
To reach Denver International Airport from central Denver, it takes around 35 minutes if you're going by car. This depends on traffic though. It's approximately 40 kilometers from the airport to the city center.
Planning to catch public transport? Expect a journey time of around 35 minutes.
Staying the night at a hotel can take the stress out of getting to the airport on time. If you're looking for a place to stay before your flight from Denver International Airport to Washington Dulles Airport, check out Baymont by Wyndham Denver International Airport. It's a quick drive from DEN.

Arriving at Washington Dulles Airport (IAD)

The last thing you want is a lengthy trip to your hotel if you're landing late on a Denver International Airport to Washington Dulles Airport flight. Book one of these accommodation options near IAD instead:
Hit the road running by picking up a Washington Dulles Airport rental car. Grab a set of wheels from Dollar, Thrifty or Sixt and explore beyond Washington DC's usual tourist stops.
Reserving your vehicle from Washington Dulles Airport about one week ahead gives you the best chance of locking in a great deal.

Getting from Washington Dulles Airport (IAD) to central Washington DC

You'll find IAD at 1 Saarinen Circle.
From Washington Dulles Airport, Washington DC is approximately 40 kilometers away. It takes around 45 minutes to reach the center by car.
If you're traveling by public transport, expect a journey of about 1 hour 10 minutes.

When to fly to Washington Dulles Airport (IAD)

July is the busiest month for flights from Denver International Airport to Washington Dulles Airport. To skip the crowds, head to Washington DC in February.
The warmest month in Washington DC is July, with the temperature ranging between 19ºC (66ºF) and 33ºC (91ºF). Lock in your flights from Denver International Airport to Washington Dulles Airport in this month if you like this kind of weather.
If you'd rather travel in cooler conditions, search for a cheap ticket from DEN to IAD in January. Average temperatures are between -6ºC (21ºF) and 10ºC (50ºF) then.

Explore more of the United States

You've visited Washington DC, now it's time to explore other corners of the United States. Journey about 322 kilometers north-east to New York to tick off its leading sights. From Central Park to Statue of Liberty and Metropolitan Museum of Art, your itinerary will be busy.
Philadelphia is another must-experience destination in the United States and is around 193 kilometers north-east of Washington DC. No journey is complete without a visit to Independence Hall, Liberty Bell and Philadelphia Museum of Art.