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CA $248 Cheap Flights from Denver (DEN) to Washington (IAD)

View CA $248 flight on Fri, Oct 2, 2026Opens in a new window

Popular airlines from Denver International Airport (DEN) to Washington Dulles International Airport (IAD)

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Cheap flights from Denver (DEN) to Washington (IAD)

Prices were available within the past 7 days and start at CA $248 for one-way flights and CA $490 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Thu, Oct 15 - Mon, Oct 19
DEN
Denver
IAD
Washington
CA $490 Roundtrip, just found
CA $490
Roundtrip
just found
Select American Airlines flight, departing Thu, Oct 15 from Denver to Washington, returning Mon, Oct 19, priced at CA $490 just found
Delta
Fri, Oct 23 - Sun, Oct 25
DEN
Denver
IAD
Washington
CA $496 Roundtrip, found 13 hours ago
CA $496
Roundtrip
found 13 hours ago
Select Delta flight, departing Fri, Oct 23 from Denver to Washington, returning Sun, Oct 25, priced at CA $496 found 13 hours ago
American Airlines
Thu, Oct 15 - Mon, Oct 19
DEN
Denver
IAD
Washington
CA $520 Roundtrip, just found
CA $520
Roundtrip
just found
Select American Airlines flight, departing Thu, Oct 15 from Denver to Washington, returning Mon, Oct 19, priced at CA $520 just found
Delta
Fri, Oct 23 - Sun, Oct 25
DEN
Denver
IAD
Washington
CA $524 Roundtrip, found 13 hours ago
CA $524
Roundtrip
found 13 hours ago
Select Delta flight, departing Fri, Oct 23 from Denver to Washington, returning Sun, Oct 25, priced at CA $524 found 13 hours ago
American Airlines
Thu, Oct 29 - Fri, Nov 6
DEN
Denver
IAD
Washington
CA $525 Roundtrip, found 17 hours ago
CA $525
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Thu, Oct 29 from Denver to Washington, returning Fri, Nov 6, priced at CA $525 found 17 hours ago
American Airlines
Wed, Nov 18 - Sun, Nov 22
DEN
Denver
IAD
Washington
CA $535 Roundtrip, found 17 hours ago
CA $535
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Wed, Nov 18 from Denver to Washington, returning Sun, Nov 22, priced at CA $535 found 17 hours ago
Alaska Airlines
Fri, Oct 23 - Sun, Oct 25
DEN
Denver
IAD
Washington
CA $538 Roundtrip, found 13 hours ago
CA $538
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Fri, Oct 23 from Denver to Washington, returning Sun, Oct 25, priced at CA $538 found 13 hours ago
American Airlines
Fri, Oct 23 - Sun, Oct 25
DEN
Denver
IAD
Washington
CA $550 Roundtrip, found 13 hours ago
CA $550
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Fri, Oct 23 from Denver to Washington, returning Sun, Oct 25, priced at CA $550 found 13 hours ago
American Airlines
Thu, Oct 1 - Wed, Oct 7
DEN
Denver
IAD
Washington
CA $560 Roundtrip, found 17 hours ago
CA $560
Roundtrip
found 17 hours ago
Select American Airlines flight, departing Thu, Oct 1 from Denver to Washington, returning Wed, Oct 7, priced at CA $560 found 17 hours ago
United
Fri, Oct 23 - Sun, Oct 25
DEN
Denver
IAD
Washington
CA $593 Roundtrip, found 13 hours ago
CA $593
Roundtrip
found 13 hours ago
Select United flight, departing Fri, Oct 23 from Denver to Washington, returning Sun, Oct 25, priced at CA $593 found 13 hours ago

Find the cheapest month to fly from Denver (DEN) to Washington (IAD)

September is typically the cheapest month to fly

From CA $236 - CA $328 per traveller.

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) cost?
You can find one-way and return flights from DEN to IAD with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when DEN to IAD ticket fares go up or down.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The cheapest months to fly from DEN to IAD are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
There are 2 airlines offering direct flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.). Here are the carriers:
  • United operates 67 direct flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.
  • Southwest Airlines operates 14 direct flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) every week.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Southwest Airlines is one of the cheapest airlines offering nonstop return flights from Denver Intl. (DEN) to Washington Dulles Intl. (IAD), with tickets starting from around CA$225 for flights that can be booked for departure within the next year. Sun Country Airlines offers one of the cheapest connecting return flights from Denver Intl. (DEN) to Washington Dulles Intl. (IAD) starting from around CA$524. These prices are per adult, for economy/coach class. Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best airline to fly with from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best airline to fly with from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will differ from traveler to traveler. If you like to fly early, Southwest Airlines offers early morning flights. If price is the most important factor, Southwest Airlines typically offers the lowest fares. United offers the most daily flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.), which is great if flexibility is what you value most. The best carrier for this journey could also be the one you have a loyalty membership with, as flying with that airline or another airline within the same alliance could help you collect points or enjoy lounge access.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll find approximately 11 nonstop flights per day from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.). For even more choices, look at flights that include layovers, as there are around 119 connecting flights per day. Some common connection points include Hartsfield-Jackson Atlanta Intl. (ATL), Portland Intl. (PDX), and Seattle - Tacoma Intl. (SEA).
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The earliest flight from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) typically departs around 12:00 AM local time. This service is offered by Frontier Airlines. Please note that this is a seasonal service, active in June and July. An early departure like this can be great for maximizing your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
You'll typically find the most flights from Denver International Airport (DEN) to Washington Dulles International Airport (IAD) on a Friday, with around 68 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United, Delta, and American Airlines. Friday offers notably more flight options compared to other days of the week, making it a great day to consider for your trip.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
The most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) are in the early morning, from 6am to 9am. Many major carriers, including United, Delta and Alaska Airlines, offer flights during this window. Many travelers prefer this because it allows for an early arrival at your destination, giving you a full day for business or exploring.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
When flying from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.), you have a few options. A nonstop flight typically takes around 3 hours 30 minutes. If you opt for a flight with one stop, your travel time will be longer, usually around 9 hours 18 minutes. For flights with two or more stops, expect the journey to take approximately 9 hours 18 minutes. The distance between these two airports is about 2332 kilometres. Keep in mind that actual flight times can vary due to factors like wind patterns and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
Yes, you can fly business class or first class between DEN and IAD. You can fly business class with Frontier Airlines and Delta.First class cabins are available on Alaska Airlines, United, Delta, and American Airlines.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Washington, DC (IAD) from Denver, CO (DEN)?
If you're planning to travel to Washington from Denver Intl. (DEN), you can fly directly into Washington Dulles Intl. (IAD). Some flights may connect through major hubs like Portland Intl. (PDX), San Diego Intl. (SAN), or Seattle - Tacoma Intl. (SEA) before reaching Washington. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.)?
If you booked your Denver, CO (DEN-Denver Intl.) to Washington, DC (IAD-Washington Dulles Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
CA $490
Distance
2318 km
Average flight time
5 hours 49 mins

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Denver to Chantilly Flights

The easy way to book your flights from Denver to Washington 

With Expedia, it’s simple to find and book flights to Washington from Denver whether you’re traveling for business or pleasure. Enter your travel dates, hit search, and choose your flight from 20 airlines that cover this route. There are nonstop flights to Washington Dulles Intl., too.  

Choose your preferred carrier and cabin class with the advanced search tool and select your ideal departure time. Then, if you want, you can see just nonstop or refundable flights. And if you’re traveling last minute, just enter the date to check out flights from Denver to Washington today, tomorrow, or this week.  

 

Save dollars with cheap flights from Denver Intl., DEN to Washington Dulles Intl., IAD 

Sort your search results by price to find great deals on your flight from Denver to Washington—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Washington from Denver currently is just CA $490 rising to CA $593.  

Here are more money-saving tips: 

  • Fly in October when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Washington  
  • Avoid peak season and weekends when flights can cost more
  • Early morning and late-night flights are sometimes cheaper, so try varying your travel times 
  • One surefire way to save money on your flight is to book your flight and hotel together with Expedia. Sometimes, the savings are so large that the flight is basically free! 

 

Reasons to choose Expedia for your flight to Washington from Denver 

Whatever your destination, budget, or reason to travel, in just one quick search, you can choose from loads of flights, airlines, and cabin classes. The filters make it quick and easy to find your ideal flights, and if you choose one of the flexible options, you won’t be charged to change your flight. So book your flight to Washington with Expedia today.

Denver to Chantilly Flights

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