Travel with Axel,
get the best price.

Washington → Denver

Dec 7, 2026 · return Dec 13, 2026

DCA → DEN1 adulteconomyRound trip

9 flight options · 5 airlines

Nonstop flights

Mon, Dec 7 – Sun, Dec 13

Frontier Airlines
7:00 amDCA
4h 16m
Nonstop
9:16 amDEN
Frontier Airlines
11:40 amDEN
3h 17m
Nonstop
4:57 pmDCA

Round-trip total · 1 adult · Taxes included

Mon, Dec 7 – Sun, Dec 13

United Airlines
4:15 pmDCA
4h 10m
Nonstop
6:25 pmDEN
United Airlines
9:35 amDEN
3h 21m
Nonstop
2:56 pmDCA

Round-trip total · 1 adult · Taxes included

Mon, Dec 7 – Sun, Dec 13

Frontier Airlines
1:40 pmDCA
4h 9m
Nonstop
3:49 pmDEN
Frontier Airlines
11:40 amDEN
3h 17m
Nonstop
4:57 pmDCA

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 7 – Sun, Dec 13

American Airlines
5:00 amDCA
6h 21m
CLT · 1h 7m
9:21 amDEN
Frontier Airlines
11:40 amDEN
3h 17m
Nonstop
4:57 pmDCA

Round-trip total · 1 adult · Taxes included

Mon, Dec 7 – Sun, Dec 13

Southwest Airlines
4:50 pmDCA
7h
MSY · 1h 20m
9:50 pmDEN
Southwest Airlines
2:00 pmDEN
6h 20m
MCI · 2h 30m
10:20 pmDCA

Round-trip total · 1 adult · Taxes included

Mon, Dec 7 – Sun, Dec 13

Delta Air Lines
7:20 pmDCA
6h 29m
MSP · 1h 23m
11:49 pmDEN
Delta Air Lines
10:39 amDEN
6h
DTW · 1h 47m
6:39 pmDCA

Round-trip total · 1 adult · Taxes included

Mon, Dec 7 – Sun, Dec 13

Southwest Airlines
4:45 pmDCA
7h
MCI · 2h 25m
9:45 pmDEN
Southwest Airlines
2:00 pmDEN
6h 20m
MCI · 2h 30m
10:20 pmDCA

Round-trip total · 1 adult · Taxes included

Mon, Dec 7 – Sun, Dec 13

Southwest Airlines
5:25 pmDCA
6h 45m
DAL · 1h 10m
10:10 pmDEN
Southwest Airlines
2:00 pmDEN
6h 20m
MCI · 2h 30m
10:20 pmDCA

Round-trip total · 1 adult · Taxes included

Mon, Dec 7 – Sun, Dec 13

United Airlines
4:13 pmDCA
4h 7m
Nonstop
6:20 pmDEN
United Airlines
9:50 amDEN
6h 28m
YYZ · 1h 38m
6:18 pmDCA

Round-trip total · 1 adult · Taxes included

Make this trip yours

DCA ⇄ DEN

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Frontier Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-07 → 2026-12-13Frontier AirlinesF9685 / F9688$180.002026-10-29T01:02:03Z
2026-12-07 → 2026-12-13United AirlinesUA746 / UA647$390.002026-10-29T01:02:03Z
2026-12-07 → 2026-12-13American Airlines / Frontier AirlinesAA2754 + AA1610 / F9688$265.002026-10-29T01:02:03Z
2026-12-07 → 2026-12-13Southwest AirlinesWN1186 + WN3156 / WN2075 + WN2234$320.002026-10-29T01:02:03Z
2026-12-07 → 2026-12-13Delta Air LinesDL2963 + DL1278 / DL1113 + DL2030$370.002026-10-29T01:02:03Z
2026-12-07 → 2026-12-13Frontier AirlinesF9687 / F9688$180.002026-10-29T01:02:03Z
2026-12-07 → 2026-12-13Southwest AirlinesWN2952 + WN2668 / WN2075 + WN2234$320.002026-10-29T01:02:03Z
2026-12-07 → 2026-12-13Southwest AirlinesWN158 + WN528 / WN2075 + WN2234$320.002026-10-29T01:02:03Z
2026-12-07 → 2026-12-13United AirlinesUA746 / UA1874 + AC8784$365.002026-10-29T01:02:03Z

2026-12-07 → 2026-12-13 · $180.00

  • Frontier Airlines F9685: DCA 2026-12-07 07:00:00 → DEN 2026-12-07 09:16:00; nonstop; 256 minutes. Local airport times.
  • Frontier Airlines F9688: DEN 2026-12-13 11:40:00 → DCA 2026-12-13 16:57:00; nonstop; 197 minutes. Local airport times.

2026-12-07 → 2026-12-13 · $390.00

  • United Airlines UA746: DCA 2026-12-07 16:15:00 → DEN 2026-12-07 18:25:00; nonstop; 250 minutes. Local airport times.
  • United Airlines UA647: DEN 2026-12-13 09:35:00 → DCA 2026-12-13 14:56:00; nonstop; 201 minutes. Local airport times.

2026-12-07 → 2026-12-13 · $265.00

  • American Airlines AA2754 / AA1610: DCA 2026-12-07 05:00:00 → DEN 2026-12-07 09:21:00; 1 stop(s) via CLT; 381 minutes. Local airport times.
    • AA2754: DCA 2026-12-07 05:00:00 → CLT 2026-12-07 06:28:00; layover at CLT: 67 minutes.
    • AA1610: CLT 2026-12-07 07:35:00 → DEN 2026-12-07 09:21:00.
  • Frontier Airlines F9688: DEN 2026-12-13 11:40:00 → DCA 2026-12-13 16:57:00; nonstop; 197 minutes. Local airport times.

2026-12-07 → 2026-12-13 · $320.00

  • Southwest Airlines WN1186 / WN3156: DCA 2026-12-07 16:50:00 → DEN 2026-12-07 21:50:00; 1 stop(s) via MSY; 420 minutes. Local airport times.
    • WN1186: DCA 2026-12-07 16:50:00 → MSY 2026-12-07 18:35:00; layover at MSY: 80 minutes.
    • WN3156: MSY 2026-12-07 19:55:00 → DEN 2026-12-07 21:50:00.
  • Southwest Airlines WN2075 / WN2234: DEN 2026-12-13 14:00:00 → DCA 2026-12-13 22:20:00; 1 stop(s) via MCI; 380 minutes. Local airport times.
    • WN2075: DEN 2026-12-13 14:00:00 → MCI 2026-12-13 16:35:00; layover at MCI: 150 minutes.
    • WN2234: MCI 2026-12-13 19:05:00 → DCA 2026-12-13 22:20:00.

2026-12-07 → 2026-12-13 · $370.00

  • Delta Air Lines DL2963 / DL1278: DCA 2026-12-07 19:20:00 → DEN 2026-12-07 23:49:00; 1 stop(s) via MSP; 389 minutes. Local airport times.
    • DL2963: DCA 2026-12-07 19:20:00 → MSP 2026-12-07 21:06:00; layover at MSP: 83 minutes.
    • DL1278: MSP 2026-12-07 22:29:00 → DEN 2026-12-07 23:49:00.
  • Delta Air Lines DL1113 / DL2030: DEN 2026-12-13 10:39:00 → DCA 2026-12-13 18:39:00; 1 stop(s) via DTW; 360 minutes. Local airport times.
    • DL1113: DEN 2026-12-13 10:39:00 → DTW 2026-12-13 15:20:00; layover at DTW: 107 minutes.
    • DL2030: DTW 2026-12-13 17:07:00 → DCA 2026-12-13 18:39:00.

2026-12-07 → 2026-12-13 · $180.00

  • Frontier Airlines F9687: DCA 2026-12-07 13:40:00 → DEN 2026-12-07 15:49:00; nonstop; 249 minutes. Local airport times.
  • Frontier Airlines F9688: DEN 2026-12-13 11:40:00 → DCA 2026-12-13 16:57:00; nonstop; 197 minutes. Local airport times.

2026-12-07 → 2026-12-13 · $320.00

  • Southwest Airlines WN2952 / WN2668: DCA 2026-12-07 16:45:00 → DEN 2026-12-07 21:45:00; 1 stop(s) via MCI; 420 minutes. Local airport times.
    • WN2952: DCA 2026-12-07 16:45:00 → MCI 2026-12-07 18:30:00; layover at MCI: 145 minutes.
    • WN2668: MCI 2026-12-07 20:55:00 → DEN 2026-12-07 21:45:00.
  • Southwest Airlines WN2075 / WN2234: DEN 2026-12-13 14:00:00 → DCA 2026-12-13 22:20:00; 1 stop(s) via MCI; 380 minutes. Local airport times.
    • WN2075: DEN 2026-12-13 14:00:00 → MCI 2026-12-13 16:35:00; layover at MCI: 150 minutes.
    • WN2234: MCI 2026-12-13 19:05:00 → DCA 2026-12-13 22:20:00.

2026-12-07 → 2026-12-13 · $320.00

  • Southwest Airlines WN158 / WN528: DCA 2026-12-07 17:25:00 → DEN 2026-12-07 22:10:00; 1 stop(s) via DAL; 405 minutes. Local airport times.
    • WN158: DCA 2026-12-07 17:25:00 → DAL 2026-12-07 19:55:00; layover at DAL: 70 minutes.
    • WN528: DAL 2026-12-07 21:05:00 → DEN 2026-12-07 22:10:00.
  • Southwest Airlines WN2075 / WN2234: DEN 2026-12-13 14:00:00 → DCA 2026-12-13 22:20:00; 1 stop(s) via MCI; 380 minutes. Local airport times.
    • WN2075: DEN 2026-12-13 14:00:00 → MCI 2026-12-13 16:35:00; layover at MCI: 150 minutes.
    • WN2234: MCI 2026-12-13 19:05:00 → DCA 2026-12-13 22:20:00.

2026-12-07 → 2026-12-13 · $365.00

  • United Airlines UA746: DCA 2026-12-07 16:13:00 → DEN 2026-12-07 18:20:00; nonstop; 247 minutes. Local airport times.
  • United Airlines UA1874 / AC8784: DEN 2026-12-13 09:50:00 → DCA 2026-12-13 18:18:00; 1 stop(s) via YYZ; 388 minutes. Local airport times.
    • UA1874: DEN 2026-12-13 09:50:00 → YYZ 2026-12-13 15:02:00; layover at YYZ: 98 minutes.
    • AC8784: YYZ 2026-12-13 16:40:00 → DCA 2026-12-13 18:18:00.

More dates for this route