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CA $253 Cheap Flights from Washington (IAD) to Denver (DEN)

View CA $253 flight on Tue, Sep 22, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at CA $253 for one-way flights and CA $477 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Sep 5 - Tue, Sep 8
IAD
Washington
DEN
Denver
CA $477 Roundtrip, just found
CA $477
Roundtrip
just found
Select Delta flight, departing Sat, Sep 5 from Washington to Denver, returning Tue, Sep 8, priced at CA $477 just found
American Airlines
Thu, Aug 20 - Mon, Aug 24
IAD
Washington
DEN
Denver
CA $478 Roundtrip, found 23 hours ago
CA $478
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Thu, Aug 20 from Washington to Denver, returning Mon, Aug 24, priced at CA $478 found 23 hours ago
Delta
Thu, Aug 20 - Mon, Aug 24
IAD
Washington
DEN
Denver
CA $506 Roundtrip, found 23 hours ago
CA $506
Roundtrip
found 23 hours ago
Select Delta flight, departing Thu, Aug 20 from Washington to Denver, returning Mon, Aug 24, priced at CA $506 found 23 hours ago
American Airlines
Fri, Aug 28 - Sun, Sep 6
IAD
Washington
DEN
Denver
CA $512 Roundtrip, found 4 days ago
CA $512
Roundtrip
found 4 days ago
Select American Airlines flight, departing Fri, Aug 28 from Washington to Denver, returning Sun, Sep 6, priced at CA $512 found 4 days ago
American Airlines
Tue, Aug 18 - Sun, Aug 23
IAD
Washington
DEN
Denver
CA $520 Roundtrip, found 18 hours ago
CA $520
Roundtrip
found 18 hours ago
Select American Airlines flight, departing Tue, Aug 18 from Washington to Denver, returning Sun, Aug 23, priced at CA $520 found 18 hours ago
Alaska Airlines
Tue, Sep 22 - Thu, Sep 24
IAD
Washington
DEN
Denver
CA $524 Roundtrip, found 2 hours ago
CA $524
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Tue, Sep 22 from Washington to Denver, returning Thu, Sep 24, priced at CA $524 found 2 hours ago
Delta
Fri, Aug 28 - Wed, Sep 2
IAD
Washington
DEN
Denver
CA $534 Roundtrip, found 1 day ago
CA $534
Roundtrip
found 1 day ago
Select Delta flight, departing Fri, Aug 28 from Washington to Denver, returning Wed, Sep 2, priced at CA $534 found 1 day ago
Alaska Airlines
Tue, Sep 22 - Thu, Sep 24
IAD
Washington
DEN
Denver
CA $539 Roundtrip, found 2 hours ago
CA $539
Roundtrip
found 2 hours ago
Select Alaska Airlines flight, departing Tue, Sep 22 from Washington to Denver, returning Thu, Sep 24, priced at CA $539 found 2 hours ago
American Airlines
Wed, Aug 26 - Wed, Sep 2
IAD
Washington
DEN
Denver
CA $541 Roundtrip, found 1 day ago
CA $541
Roundtrip
found 1 day ago
Select American Airlines flight, departing Wed, Aug 26 from Washington to Denver, returning Wed, Sep 2, priced at CA $541 found 1 day ago
Sun Country Airlines
Fri, Oct 9 - Tue, Oct 13
IAD
Washington
DEN
Denver
CA $565 Roundtrip, found 5 days ago
CA $565
Roundtrip
found 5 days ago
Select Sun Country Airlines flight, departing Fri, Oct 9 from Washington to Denver, returning Tue, Oct 13, priced at CA $565 found 5 days ago

Alternative airports near Denver

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Denver Intl. DEN. Cheapest option available. Average driving time to city centre is 32 minutes. Flights from CA $549
DEN
Denver Intl.
Cheapest
Average driving time to city centre32 min
Flights from CA $549

Frequently asked questions

How much does a flight from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.) cost?
You can find one-way and return flights from MAN to GDZ 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 IAD to DEN ticket fares go up or down.
What is the cheapest month to fly from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
If you're looking for the cheapest time to fly from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.), September is typically your best bet. You can expect average return fares to be around CA$421 during this month. September often sees lower prices as the summer travel rush winds down and before the winter holiday season picks up, making it a great time to find a deal. Other budget-friendly months to consider for this route include July and August.
Which airlines fly direct from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
There are 2 airlines offering direct flights from Washington Dulles Intl. (IAD) to Denver Intl. (DEN). Here are the carriers:
  • United operates 76 direct flights from Washington Dulles Intl. to Denver Intl. every week.
  • Southwest Airlines operates 14 direct flights from Washington Dulles Intl. to Denver Intl. every week.
How do I find cheap flights from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver 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 Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
The best airline to fly with from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver 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 Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver 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 Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
The cheapest months to fly from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.) are typically September and August, with average return flights around CA$421. However, the most popular months for this route are June and April, meaning you'll find plenty of flight options then. If you're looking for the best balance of good prices and a wide selection of flights, you might consider travelling in late summer or early autumn.
How many flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
You'll find approximately 12 nonstop flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.). For even more choices, look at flights that include layovers, as there are around 90 connecting flights daily. Some common connection points include Seattle - Tacoma Intl. (SEA), Hartsfield-Jackson Atlanta Intl. (ATL), and Charlotte-Douglas Intl. (CLT).
What is the earliest flight from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
The earliest flight from Washington Dulles Intl. (IAD) to Denver Intl. (DEN) typically departs around 5:00 AM local time, operated by American Airlines. This is a seasonal service, active in February and March. An early departure like this can help you make the most of 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 Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
You'll typically find the most flights from Washington Dulles Intl. (IAD) to Denver Intl. (DEN) on a Thursday, with around 53 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include United, Delta, and American Airlines. Thursday offers notably more flight options compared to other days of the week, making it a convenient day to fly.
What are the most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
The most popular departure times for flights from Washington Dulles Intl. (IAD) to Denver Intl. (DEN) are in the early morning, from 6am to 9am. Many major carriers, including Delta, United and American Airlines, offer flights during this window. Many travellers prefer these times as it allows for an early start to their day in Denver.
How long does it take to fly from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
When flying from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.), you have a few options. A nonstop flight typically takes around 4 hours, covering a distance of approximately 2,332 kilometres. If you opt for a one-stop flight, your travel time will generally be longer, averaging about 9 hours 12 minutes. Flights with two or more stops usually take even more time, around 11 hours 17 minutes. Keep in mind that actual flight durations can vary due to factors like wind patterns and specific routing.
Can you fly business or first class from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
Yes, you can fly business class or first class between IAD and DEN.Airlines that offer business class service on this route include:

  • Frontier Airlines
  • Delta

First class cabins are available on:

  • Alaska Airlines
  • Delta
  • American Airlines
  • United

How do I earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.) flight with Expedia?
It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver 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 Denver, CO (DEN) from Washington, DC (IAD)?
If you're planning to travel to Denver from Washington Dulles Intl. (IAD), you can fly directly into Denver Intl. (DEN). Some flights may connect through major hubs like Seattle - Tacoma Intl. (SEA), San Diego Intl. (SAN), or Charlotte-Douglas Intl. (CLT) before reaching Denver. 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 Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.) at the last minute?
Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver 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 Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.) flight and hotel package?
Securing a Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver 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 Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver Intl.)?
If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Denver, CO (DEN-Denver 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
Washington Dulles Intl.
Destination airport
Denver Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, United
Roundtrip price
CA $476
Distance
2318 km
Average flight time
2 hours 24 mins

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Chantilly to Denver Flights

The easy way to book your flights from Washington to Denver 

With Expedia, it’s simple to find and book flights to Denver from Washington 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 Denver 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 Washington to Denver today, tomorrow, or this week.  

 

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

Sort your search results by price to find great deals on your flight from Washington to Denver—you get all your cheapest options first. Grab yourself a bargain now—the lowest price on flights to Denver from Washington currently is just CA $477 rising to CA $565.  

Here are more money-saving tips: 

  • Fly in September when flight prices are normally at their lowest 
  • Book about a month to 6 weeks before you travel for the best prices to Denver  
  • 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 Denver from Washington 

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 Denver with Expedia today.

Chantilly to Denver Flights

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