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Cheap Flights from Washington D.C. to Denver

Explore the cheapest flights from Washington D.C. to Denver in the next three months. Based on Trip.com's data from the latest 7 days, one-way direct flights start at S$ 143, and round-trip direct tickets start at S$ 275.

      • Cheapest nonstop
        DCA 07:00
        4h 1m
        Direct
        DEN 09:01
        Washington D.C. - Denver | Sat, Aug 22 | Frontier Airlines
        DEN 11:25
        3h 34m
        Direct
        DCA 16:59
        Denver - Washington D.C. | Tue, Aug 25 | Frontier Airlines
        S$ 275 S$ 358
        23% off
        23% off
        S$ 358 S$ 275
      • DCA 07:00
        4h 1m
        Direct
        DEN 09:01
        Washington D.C. - Denver | Mon, Aug 17 | Frontier Airlines
        DEN 16:28
        3h 31m
        Direct
        DCA 21:59
        Denver - Washington D.C. | Mon, Aug 24 | Frontier Airlines
        S$ 275 S$ 358
        23% off
        23% off
        S$ 358 S$ 275
      • IAD 17:47
        6h 18m
        1 stop
        DEN 22:05
        Washington D.C. - Denver | Sat, Aug 29 | Delta Air Lines
        DEN 13:15
        6h 30m
        1 stop
        DCA 21:45
        Denver - Washington D.C. | Sat, Sep 5 | Delta Air Lines
        S$ 250 S$ 358
        30% off
        30% off
        S$ 358 S$ 250
      • IAD 06:00
        7h 25m
        1 stop
        DEN 11:25
        Washington D.C. - Denver | Mon, Aug 17 | Delta Air Lines
        DEN 00:50
        6h 30m
        1 stop
        IAD 09:20
        Denver - Washington D.C. | Sun, Aug 23 | Delta Air Lines
        S$ 259
        28% off
        S$ 358 S$ 259
      • IAD 19:26
        7h 10m
        1 stop
        DEN 00:36
        Washington D.C. - Denver | Tue, Aug 11 | Delta Air Lines
        DEN 00:50
        7h 14m
        1 stop
        IAD 10:04
        Denver - Washington D.C. | Thu, Aug 13 | Delta Air Lines
        S$ 262
        27% off
        S$ 358 S$ 262
      • DCA 06:00
        7h 25m
        1 stop
        DEN 11:25
        Washington D.C. - Denver | Mon, Aug 24 | Delta Air Lines
        DEN 07:19
        5h 34m
        1 stop
        DCA 14:53
        Denver - Washington D.C. | Sun, Aug 30 | Delta Air Lines
        S$ 263
        27% off
        S$ 358 S$ 263
      • DCA 06:05
        8h 3m
        1 stop
        DEN 12:08
        Washington D.C. - Denver | Sun, Aug 23 | Delta Air Lines
        DEN 14:54
        6h 54m
        1 stop
        DCA 23:48
        Denver - Washington D.C. | Mon, Aug 24 | Delta Air Lines
        S$ 263
        27% off
        S$ 358 S$ 263
      • DCA 19:45
        6h 51m
        1 stop
        DEN 00:36
        Washington D.C. - Denver | Tue, Aug 25 | Delta Air Lines
        DEN 00:50
        6h 30m
        1 stop
        IAD 09:20
        Denver - Washington D.C. | Sat, Aug 29 | Delta Air Lines
        S$ 263
        27% off
        S$ 358 S$ 263
      • DCA 13:45
        6h 12m
        1 stop
        DEN 17:57
        Washington D.C. - Denver | Mon, Aug 31 | Delta Air Lines
        DEN 06:00
        5h 35m
        1 stop
        IAD 13:35
        Denver - Washington D.C. | Thu, Sep 3 | Delta Air Lines
        S$ 264
        26% off
        S$ 358 S$ 264
      • DCA 10:10
        6h 42m
        1 stop
        DEN 14:52
        Washington D.C. - Denver | Thu, Sep 3 | Delta Air Lines
        DEN 16:33
        6h 1m
        1 stop
        IAD 00:34
        Denver - Washington D.C. | Mon, Sep 7 | Delta Air Lines
        S$ 264
        26% off
        S$ 358 S$ 264
      • DCA 18:30
        6h 32m
        1 stop
        DEN 23:02
        Washington D.C. - Denver | Sun, Aug 16 | Delta Air Lines
        DEN 07:10
        7h 9m
        1 stop
        DCA 16:19
        Denver - Washington D.C. | Sun, Aug 23 | Delta Air Lines
        S$ 264
        26% off
        S$ 358 S$ 264
      • DCA 09:39
        6h 6m
        1 stop
        DEN 13:45
        Washington D.C. - Denver | Mon, Sep 7 | Delta Air Lines
        DEN 00:50
        6h 20m
        1 stop
        IAD 09:10
        Denver - Washington D.C. | Sun, Sep 13 | Delta Air Lines
        S$ 268
        25% off
        S$ 358 S$ 268
      • WAS 13:00
        17h 25m
        1 stop
        DEN 14:00
        Washington D.C. - Denver | Thu, Jul 23 | Normal Airline
        DEN 15:00
        6h
        Direct
        WAS 16:00
        Denver - Washington D.C. | Sat, Jul 25 | Normal Airline
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      • Cheapest nonstop
        DCA 13:59
        4h 4m
        Direct
        DEN 16:03
        Washington D.C. - Denver | Thu, Sep 10 | Frontier Airlines
        S$ 143 S$ 188
        24% off
        24% off
        S$ 188 S$ 143
      • DCA 07:00
        4h 1m
        Direct
        DEN 09:01
        Washington D.C. - Denver | Sat, Aug 15 | Frontier Airlines
        S$ 143 S$ 188
        24% off
        24% off
        S$ 188 S$ 143
      • DCA 18:00
        4h 7m
        Direct
        DEN 20:07
        Washington D.C. - Denver | Wed, Sep 9 | Frontier Airlines
        S$ 143 S$ 188
        24% off
        24% off
        S$ 188 S$ 143
      • DCA 18:00
        4h 7m
        Direct
        DEN 20:07
        Washington D.C. - Denver | Tue, Aug 11 | Frontier Airlines
        S$ 143
        24% off
        S$ 188 S$ 143
      • IAD 09:13
        10h 47m
        1 stop
        DEN 18:00
        Washington D.C. - Denver | Wed, Aug 19 | Frontier Airlines
        S$ 105
        44% off
        S$ 188 S$ 105
      • IAD 07:48
        8h 13m
        1 stop
        DEN 14:01
        Washington D.C. - Denver | Tue, Aug 18 | Frontier Airlines
        S$ 109
        42% off
        S$ 188 S$ 109
      • IAD 09:50
        10h 10m
        1 stop
        DEN 18:00
        Washington D.C. - Denver | Fri, Aug 14 | Frontier Airlines
        S$ 112
        40% off
        S$ 188 S$ 112
      • IAD 08:59
        17h 11m
        1 stop
        DEN 00:10
        Washington D.C. - Denver | Thu, Aug 27 | Frontier Airlines
        S$ 112
        40% off
        S$ 188 S$ 112
      • IAD 09:50
        13h 51m
        1 stop
        DEN 21:41
        Washington D.C. - Denver | Thu, Aug 13 | Frontier Airlines
        S$ 137
        27% off
        S$ 188 S$ 137
      • IAD 08:59
        17h 11m
        1 stop
        DEN 00:10
        Washington D.C. - Denver | Thu, Aug 20 | Frontier Airlines
        S$ 144
        23% off
        S$ 188 S$ 144
      • WAS 13:00
        17h 25m
        1 stop
        DEN 14:00
        Washington D.C. - Denver | Thu, Jul 23 | Normal Airline
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Popular airlines from Washington D.C. to Denver

You can choose from 1 airlines that fly from Washington D.C. to Denver, including Frontier Airlines, Frontier Airlines offers the lowest prices on this route.
Frontier Airlines logo Frontier Airlines
Airlines are determined based on actual purchased flight tickets from Washington D.C. to Denver according to previous 12 months data from Trip.com.

Flying from Washington D.C. to Denver

The distance between Washington D.C. and Denver is approximately 2,368.31km. It takes around 5 hours 26 minutes on average to fly from Washington D.C. to Denver. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is November.

Cheapest one-way flight priceS$ 105
Cheapest return ticket priceS$ 250
Off-season for travelNovember
Peak season for travelJuly
Flight distance2,368.31km
Average flight time5 hours 26 minutes
Popular airlineFrontier Airlines
Flight statistics for the Washington D.C.–Denver route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from Washington D.C. to Denver.

What is the cheapest month for one-way flights from Washington D.C. to Denver?

The average price of one-way flights from Washington D.C. to Denver purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from Washington D.C. to Denver is January, with an average price of S$ 123, and the most expensive month is August, with an average price of up to S$ 445.

S$ 445
S$ 284
S$ 123
0
    Cheapest
  • S$ 177
    Jul
  • S$ 445
    Aug
  • S$ 307
    Sep
  • S$ 158
    Oct
  • S$ 268
    Nov
  • S$ 230
    Dec
  • S$ 123
    Jan
  • S$ 190
    Feb
  • S$ 227
    Mar
  • S$ 223
    Apr
  • S$ 256
    May
  • S$ 318
    Jun

What is the cheapest day to fly from Washington D.C. to Denver during National Day?

Based on Trip.com's data over the past 3 days, these are the lowest one-way airfares from Washington D.C. to Denver during National Day.

National Day is scheduled on Aug 9. The flights from Washington D.C. to Denver are cheapest on Aug 9, with the lowest fare of S$ 143.

S$ 196
S$ 170
S$ 143
S$ 117
    Cheapest
  • S$ 169
    5
    Aug
  • S$ 160
    6
  • S$ 196
    7
  • S$ 146
    8
  • S$ 143
    9
  • S$ 165
    10
  • S$ 151
    11

Frequently Asked Questions

  • Which airlines offer the cheapest flights from Washington D.C. (WAS) to Denver (DEN)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as S$ 105 on Cheapest nonstop routes (e.g. IAD to DEN on Wed, Aug 19), while Delta Air Lines offers Cheapest nonstop round-trips from S$ 250 departing on Sat, Aug 29 and returning on Sat, Sep 5.
  • At the moment, you can catch a direct flight from Washington D.C. to Denver with the following airlines, including: Frontier Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 5 hours 26 minutes to fly from Washington D.C. (WAS) to Denver (DEN).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Washington D.C. to Denver is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 93 flight per week flying from Washington D.C. to Denver. You can check the weekly schedule for popular airlines on this route below: Frontier Airlines: S/M/T/W/T/F/S -- F9685 (07:28)
  • To find best deals on flights from Washington D.C. to Denver, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Aug 19, with one-way flights priced at just S$ 105.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Denver travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Washington D.C. to Denver is November, when demand for travel is lower.
  • After crunching the numbers on our July flight calendar, it's currently cheapest to fly from Washington D.C. to Denver on July 28, 2026 with Frontier Airlines, with prices starting at S$ 146.
  • You can land at any one of the following hubs in Denver, with Ronald Reagan Washington National Airport to Denver International Airport (DCA-DEN) is by far the most common option on this route: Denver International Airport (DEN) Rocky Mountain Metropolitan Airport (BJC).
  • The time difference between Denver and Washington D.C. is 2h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Find Cheap Flights & Deals on Trip.com

Note: Prices shown on this page are the lowest estimated prices found in the last 24 hours and include all taxes and fees.

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Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are shown before payment. Charges for checked baggage, meals, Wi-Fi, and other optional services may also appear in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page have been updated within the last 24 hours, and with many routes refreshed in real time. The more popular the route, the more accurate the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.