DEN - WAS

$156 Find Cheap Flights from Denver to Washington, D.C. - Compare and Save

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Everything you should know

Cheapest round-trip
$297
Typical prices: $277-$541
Frontier
Sun 12/23Thu 1/4
DEN - IAD • 1 stop
Cheapest non-stop
$298
Typical prices: $279-$547
Frontier
Fri 1/12Mon 1/15
DEN - DCA • Non-stop
Advice from real travelers
Frontier Premium Bundle adds legroom and priority boarding for $20 over Economy.
Southwest includes a free carry-on; DCA is the most convenient airport for downtown.
Expert advice
+1
Expert advice
+1
Nonstop flights
You can fly direct with United Airlines and Frontier. Average duration is 3h 22m
Direct flights
+1
Direct flights
+1
Top routes
Cheapest • 14% average savings
Most popular
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 11 weeks in advance save around 37% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 36% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $299 (round-trip)
Shortest trip • 5h 02m (one-way)
Insights
Insights
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We hope you love your trip to Washington, D.C.!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Denver to Washington, D.C. (DEN-WAS)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Denver to Washington, D.C.

Wed, Dec 23 - Mon, Jan 4
Frontier Logo
6:25 am - 7:31 pmDEN  Denver Intl-IAD Washington, D.C. Dulles Intl
11h 06m1 stop Dallas/Fort Worth
Frontier Logo
8:51 pm - 12:26 pmIAD  Washington, D.C. Dulles Intl-DEN Denver Intl
17h 35m1 stop Las Vegas Harry Reid Intl
$297Frontier
Tue, Jan 12 - Fri, Jan 15
Frontier Logo
11:35 am - 4:59 pmDEN  Denver Intl-DCA Washington, D.C. Reagan-National
3h 24mnonstop
Frontier Logo
7:00 am - 9:20 amDCA  Washington, D.C. Reagan-National-DEN Denver Intl
4h 20mnonstop
$298Frontier
Fri, Jan 29 - Wed, Feb 3
JetBlue Logo
12:50 pm - 10:55 pmDEN  Denver Intl-DCA Washington, D.C. Reagan-National
8h 05m1 stop New York John F Kennedy Intl
JetBlue Logo
6:00 am - 12:00 pmDCA  Washington, D.C. Reagan-National-DEN Denver Intl
8h 00m1 stop New York John F Kennedy Intl
$314JetBlue
Fri, Dec 4 - Tue, Dec 8
Multiple Airlines Logo
7:30 am - 12:48 pmDEN  Denver Intl-DCA Washington, D.C. Reagan-National
3h 18mnonstop
Multiple Airlines Logo
5:20 pm - 2:24 pmDCA  Washington, D.C. Reagan-National-DEN Denver Intl
23h 04m1 stop Portland
$322Multiple Airlines
Thu, Nov 26 - Wed, Dec 2
American Airlines Logo
9:15 am - 5:02 pmDEN  Denver Intl-DCA Washington, D.C. Reagan-National
5h 47m1 stop Chicago O'Hare Intl
American Airlines Logo
5:26 pm - 9:58 pmDCA  Washington, D.C. Reagan-National-DEN Denver Intl
6h 32m1 stop Charlotte Douglas
$354American Airlines
Thu, Feb 4 - Mon, Feb 8
American Airlines Logo
8:07 am - 3:59 pmDEN  Denver Intl-DCA Washington, D.C. Reagan-National
5h 52m1 stop Chicago O'Hare Intl
American Airlines Logo
6:24 pm - 11:19 pmDCA  Washington, D.C. Reagan-National-DEN Denver Intl
6h 55m1 stop Chicago O'Hare Intl
$355American Airlines
Mon, Jan 11 - Tue, Jan 12
United Airlines Logo
5:58 pm - 7:24 amDEN  Denver Intl-IAD Washington, D.C. Dulles Intl
11h 26m1 stop Cleveland Hopkins Intl
United Airlines Logo
9:49 am - 12:00 pmIAD  Washington, D.C. Dulles Intl-DEN Denver Intl
4h 11mnonstop
$374United Airlines
Mon, Jan 11 - Thu, Jan 14
Southwest Logo
6:50 am - 1:55 pmDEN  Denver Intl-DCA Washington, D.C. Reagan-National
5h 05m1 stop Chicago Midway
Southwest Logo
6:10 am - 10:55 amDCA  Washington, D.C. Reagan-National-DEN Denver Intl
6h 45m1 stop Dallas Love Field
$374Southwest
Thu, Dec 3 - Fri, Dec 4
Southwest Logo
11:20 am - 6:00 pmDEN  Denver Intl-DCA Washington, D.C. Reagan-National
4h 40m1 stop Omaha Eppley Airfield
Southwest Logo
4:00 pm - 7:15 pmDCA  Washington, D.C. Reagan-National-DEN Denver Intl
5h 15m1 stop Omaha Eppley Airfield
$378Southwest
Tue, Feb 9 - Mon, Feb 15
United Airlines Logo
2:10 pm - 7:31 pmDEN  Denver Intl-IAD Washington, D.C. Dulles Intl
3h 21mnonstop
United Airlines Logo
7:59 pm - 10:05 pmIAD  Washington, D.C. Dulles Intl-DEN Denver Intl
4h 06mnonstop
$379United Airlines
Booking Insights

Price, demand and travel trends for Denver to Washington, D.C. flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Denver to Washington, D.C.?

Round-trip flights from Denver to Washington, D.C. typically range from $277 to $541. The lowest price found in the past 5 days was $297, on Frontier.

What is the cheapest Denver to Washington, D.C. flight route?

Denver (DEN) to Washington, D.C. Reagan-National Airport (DCA) is the cheapest Denver to Washington, D.C. route, averaging $346 round-trip. Other Denver to Washington, D.C. routes average $461, based on KAYAK data over the past 12 months.

What's the cheapest day of the week to fly from Denver to Washington, D.C.?

Based on deals KAYAK users found in the last 12 months, Thursday is the cheapest day of the week to fly from Denver to Washington, D.C.. It’s 8% cheaper than the average day, while Monday is the most expensive, with prices 33% higher.

What’s the cheapest month to fly from Denver to Washington, D.C.?

•February is the cheapest month to fly from Denver to Washington, D.C. at $246 round-trip.
•June ($457) and July ($445) are the most expensive months.
•The price difference between flying in the cheapest and most expensive months is 85% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are flights from Denver to Washington, D.C. the cheapest?

Flights from Denver to Washington, D.C. are cheapest 11 weeks before departure. Booking in this window typically costs about 37% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Denver to Washington, D.C.

 
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Frontier, United Airlines, DCA and IAD

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Blane Bachelor

Blane Bachelor

Expert on Southwest

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Harriet Baskas

Harriet Baskas

Expert on DEN

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Key details for Denver to Washington, D.C. flights

Low season

September

Cheapest flight

$156
Beat the crowds with an average 17% drop in travelers.
The most popular month to fly with an average 29% increase in travelers.
One-way flight from Denver to Washington, D.C. Reagan-National Airport

When to book flights from Denver to Washington, D.C.

Are your dates flexible? Find out the best times to travel from Denver to Washington, D.C. based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Flights from Denver to Washington, D.C.: the best tips from KAYAK users' own experiences

Insights shared by verified travelers who flew the route from Denver to Washington, D.C. 
NguyenFlew with United Airlines-Mar 2026
Check in desk immediately when you come in the doors on the left of door 215. Get TSA touchless before the flight—the line is so much shorter.
NesrinFlew with Southwest-Feb 2026
Get a seat in the very front if you can, otherwise, it is a very slow process.
JasonFlew with United Airlines-Nov 2024
DIA is a large airport. Get there early.
BindulFlew with United Airlines-Feb 2024
There are multiple flights between DEN and IAD everyday, including some wide bodies. Try and get on one of the wide bodies whenever possible.

Your Denver to Washington, D.C. flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What are the earliest and latest flights from Denver to Washington, D.C.?

    These are the earliest and latest flight times available from Denver to Washington, D.C.:

    • Earliest: departs at 6:00 am and lands at 9:22 am
    • Latest: departs at 11:59 pm and lands at 3:21 am.

    The flight takes about 3h 22m.

  • What cabin classes can I book on flights from Denver to Washington, D.C.?

    Four cabin classes are available on flights from Denver to Washington, D.C.:

    • Economy Class
    • Premium Economy Class
    • Business Class
    • First Class

    Prices vary by airline.

  • How long is a flight from Denver to Washington, D.C.?

    A nonstop flight from Denver to Washington, D.C. takes 3h 22m, covering 1,471 miles.

  • Do I need a passport to fly from Denver to Washington, D.C.?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID or another TSA-accepted form of identification.

  • How much should I expect to pay for a Denver to Washington, D.C. flight?

    Round-trip flights from Denver to Washington, D.C. range from $277 to $541, with an average of $385 over the past 12 months. Anything below $277 counts as a good deal.

  • How expensive are last-minute Denver to Washington, D.C. flights?

    Last-minute fares on this route (booked within two weeks of departure) run 35% above the $385 route average. Book 11 weeks before departure for the lowest fares.

  • How much can I save by taking a layover when flying from Denver to Washington, D.C.?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $299 round-trip via Boston Logan Intl (BOS), compared to $390 for nonstop.

  • What is the standard checked-bag allowance on flights from Denver to Washington, D.C.?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • How are flight departures from Denver to Washington, D.C. spread across the day?

    Morning is the busiest departure period on Denver to Washington, D.C. flights, with 46% of flights leaving in that window. Afternoon departures account for 36%, evening flights for 9%, and night flights for 9%.

  • Have flight prices from Denver to Washington, D.C. changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $297 to $2,292. That means the highest observed fare was about 8x higher than the lowest one.

  • How are flight prices from Denver to Washington, D.C. looking right now?

    One-way fares from Denver to Washington, D.C. are currently lower than usual. Average one-way flight prices are about $185, which is 27% below the typical average for this route.

  • What car rental options are available in Washington, D.C.?

    Since Washington, D.C. is served by multiple airports, car rental options and rates can vary depending on which one you fly into.
    Near Washington, D.C. Reagan-National Airport (DCA) — daily rates averaging $71:

    • Sixt
    • Dollar
    • Hertz
    • Thrifty
    • Alamo

    Near Washington, D.C. Dulles Intl Airport (IAD) — daily rates averaging $70:

    • Hertz
    • Dollar
    • Budget
    • Sixt
    • Thrifty

  • Which airports can I use when flying from Denver to Washington, D.C.?

    Flights from Denver to Washington, D.C. usually depart from Denver Intl (DEN) and may arrive at several airports in Washington, D.C. area, including Washington, D.C. Reagan-National (DCA) and Washington, D.C. Dulles Intl (IAD).

  • Which airports do connecting flights from Denver to Washington, D.C. pass through?

    One-stop flights from Denver to Washington, D.C. most commonly connect through:

    • Atlanta Hartsfield-Jackson (ATL) - 37% of one-stop connections
    • Chicago O'Hare Intl (ORD) - 11% of one-stop connections
    • Boston Logan Intl (BOS) - 10% of one-stop connections
    • Lambert-St Louis (STL) - 10% of one-stop connections

  • Can I save money by using flexible dates for flights from Denver to Washington, D.C.?

    Yes. Flexible dates can save you up to 31% on flights from Denver to Washington, D.C.. Thursday is the cheapest departure day at $355 round-trip on average, while Monday is the most expensive at $514, a difference of $159.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • What airlines fly from Denver to Washington, D.C.?

    2 airlines operate flights between Denver and Washington, D.C.. The airlines offering nonstop flights on this route include:

    • United Airlines
    • Frontier

  • How much time can I save by choosing a different layover airport from Denver to Washington, D.C.?

    Flying via Omaha Eppley Airfield (OMA) gives the shortest average 1-stop total travel time at 5h 02m, compared with 5h 05m via Kansas City (MCI) and 5h 25m via Lambert-St Louis (STL).

  • What is the time difference between Denver and Washington, D.C.?

    Washington, D.C. is 2 hours ahead of Denver (Eastern Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in Washington, D.C.?

    Some of the most popular sights in Washington, D.C. are Walter E. Washington Convention Center, National Mall and Capital One Arena. These are among the most viewed places in Washington, D.C. on KAYAK.

  • Which airlines offer extra legroom and free seat selection on Denver to Washington, D.C. flights?

    Among airlines operating Denver to Washington, D.C. flights:

    • Frontier: offers free seat selection
    • United Airlines: offers extra legroom; offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • Which airlines include bags at no extra cost on Denver to Washington, D.C. flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • Frontier: a cabin bag and a checked bag in Economy Class
    • United Airlines: a cabin bag and a checked bag in Economy Class

    Bag allowance can vary by ticket type, cabin class, route and airline, so always check the fare details before booking.

  • How early should I get to Denver International Airport (DEN)?

    DEN posts real-time security wait-time information on its website. Travelers should arrive 2 hours before a flight to allow time for check-in and security. Arriving early can also help avoid last-minute inconveniences and unexpected issues.

  • Can I rent a car at Dulles International Airport in Washington, DC?

    Yes, car rental is available from one of the airport's car rental companies. Free shuttle buses to the car rental facilities stop near the Baggage Claim area in the Main Terminal.

  • What are the options for connecting from IAD to downtown?

    Travelers can take the Silver Line Metro from Washington Dulles International Airport (IAD) to downtown D.C. It is a reliable and inexpensive option.

  • Are there nursing areas at DEN?

    Yes, DEN has private, comfortable nursing rooms for breastfeeding and infant care. The rooms are centrally located in Concourses A, B and C.

  • Can I travel with kids in Washington, DC, from Denver?

    Yes. Some airlines on flights from DEN to WAS offer kid-friendly amenities. Southwest's Extra Legroom seats have 34–36 inches of pitch, depending on the aircraft. The airline also offers free snacks and allows qualifying safety seats. Qualifying booster seats and fully collapsible strollers under 20 lb that fit in an overhead bin may be carried on.

  • Can I travel with my pet?

    Yes, Denver International Airport (DEN) is pet friendly and has designated animal relief areas throughout the airport. Cleaning materials are also provided in these areas. Leashes or cages are recommended for pets. Washington Dulles International Airport (IAD) and Reagan National Airport (DCA) are also pet friendly. Travelers can contact their airline about rules and guidelines for traveling with animals, since they may vary between airlines.

  • Are there lounges in Denver International Airport?

    Yes, Denver International Airport (DEN) has many lounges, most of them operated by airlines. These lounges offer complimentary services and amenities for travelers before a flight. Travelers can contact their airline for information on airline lounges.

  • Where can I park my car at DEN before flying to Washington, D.C.?

    DEN has four parking options: Garage (East and West), Economy (East and West), Pikes Peak Shuttle and Premium parking. Fees vary by the number of hours parked. Premium Reserved Parking is the exception, with a daily rate and no hourly option. It must be booked online at least 24 hours before arrival.

Your guide to booking Denver to Washington, D.C. flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Thursday departure and avoid flying on Monday. On this route, Thursday flights average $355, about $159 less than Monday fares (31% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 11 weeks before you fly. On this route, that window historically saves about 37% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Denver to Washington, D.C. trip for February. Fares historically average $246 round-trip in that month - typically $211 less than the most expensive month, which is June (based on the last 12 months).
  • If you have the time, taking a 1-stop flight through Boston Logan Intl Airport (BOS) can be cheaper than flying direct. The cheapest layover option averages $299 round-trip on this route - about $91 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Washington, D.C. Reagan-National Airport.

    • Hyatt House Washington DC The Wharf
    • Intercontinental Hotels Washington D.C. - The Wharf By IHG
    • Cambria Hotel Washington D.C. Navy Yard Riverfront
  • If you're flying from Denver to Washington, D.C., depart from Denver International Airport (DEN), about a 25-minute drive from the city center. For an easy, affordable trip to the airport, you can take the RTD airport railway. A taxi or rental car is another option.
  • If you're traveling with kids, use Denver International Airport's designated play areas to let them burn off energy before your flight. A stop at the play area and a ride on the Automatic Guideway Terminal System can keep them busy while you take care of other things.
  • If you need accessibility support at DEN, contact your airline to arrange wheelchair service or other special assistance. The airport also has accessible garages with elevators and restrooms with height-adjustable adult changing tables.

Prefer to fly direct from Denver to Washington, D.C.?

 
Find which airlines fly direct from Denver Intl Airport to Washington, D.C., which days they fly and book direct flights.

Direct departures

Denver Intl to Washington, D.C.

Monday

Frontier,United Airlines

Frontier,United Airlines

Tuesday

Frontier,United Airlines

Frontier,United Airlines

Wednesday

Frontier,United Airlines

Frontier,United Airlines

Thursday

Frontier,United Airlines

Frontier,United Airlines

Friday

Frontier,United Airlines

Frontier,United Airlines

Saturday

Frontier,United Airlines

Frontier,United Airlines

Sunday

Frontier,United Airlines

Frontier,United Airlines

See more direct flights

Direct returns

Washington, D.C. to Denver Intl

Monday

Frontier,United Airlines

Frontier,United Airlines

Tuesday

Frontier,United Airlines

Frontier,United Airlines

Wednesday

Frontier,United Airlines

Frontier,United Airlines

Thursday

Frontier,United Airlines

Frontier,United Airlines

Friday

Frontier,United Airlines

Frontier,United Airlines

Saturday

Frontier,United Airlines

Frontier,United Airlines

Sunday

Frontier,United Airlines

Frontier,United Airlines

See more direct flights

More options for your flight from Denver to Washington, D.C.

Complete your trip to Washington, D.C. with a hotel stay or car rental