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Saint Louis → Dulles

Dec 21, 2026 · return Dec 31, 2026

STL → IAD1 adulteconomyRound trip

7 flight options · 4 airlines

Nonstop flights

Mon, Dec 21 – Thu, Dec 31

United Airlines
1:17 pmSTL
2h 5m
Nonstop
4:22 pmIAD
United Airlines
8:35 amIAD
2h 33m
Nonstop
10:08 amSTL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

United Airlines
8:30 amSTL
2h 5m
Nonstop
11:35 amIAD
United Airlines
8:35 amIAD
2h 33m
Nonstop
10:08 amSTL

Round-trip total · 1 adult · Taxes included

One-stop flights

Mon, Dec 21 – Thu, Dec 31

Frontier Airlines
6:21 pmSTL
5h 30m
ATL · 1h 43m
12:51 am+1IAD
United Airlines
8:35 amIAD
2h 33m
Nonstop
10:08 amSTL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

American Airlines
12:54 pmSTL
5h 39m
CLT · 2h 15m
7:33 pmIAD
American Airlines
6:00 amIAD
5h 19m
CLT · 1h 27m
10:19 amSTL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
10:14 amSTL
5h 4m
DTW · 1h 59m
4:18 pmIAD
Delta Air Lines
12:35 pmIAD
5h 31m
JFK · 1h 9m
5:06 pmSTL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

United Airlines
6:55 pmSTL
4h 35m
ORD · 1h 16m
12:30 am+1IAD
United Airlines
8:35 amIAD
2h 33m
Nonstop
10:08 amSTL

Round-trip total · 1 adult · Taxes included

Mon, Dec 21 – Thu, Dec 31

Delta Air Lines
10:06 amSTL
4h 56m
ATL · 1h 45m
4:02 pmIAD
Delta Air Lines
12:35 pmIAD
5h 31m
JFK · 1h 9m
5:06 pmSTL

Round-trip total · 1 adult · Taxes included

Make this trip yours

STL ⇄ IAD

Economy

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

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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)
2026-12-21 → 2026-12-31United AirlinesUA4454 / UA4427$400.002026-10-29T01:28:37Z
2026-12-21 → 2026-12-31Frontier Airlines / United AirlinesF94474 + F94708 / UA4427$312.502026-10-29T01:28:37Z
2026-12-21 → 2026-12-31American AirlinesAA2486 + AA5317 / AA5649 + AA2486$387.502026-10-29T01:28:37Z
2026-12-21 → 2026-12-31Delta Air LinesDL2868 + DL5413 / DL5618 + DL4715$412.502026-10-29T01:28:37Z
2026-12-21 → 2026-12-31United AirlinesUA4406 / UA4427$400.002026-10-29T01:28:37Z
2026-12-21 → 2026-12-31United AirlinesUA4397 + UA1779 / UA4427$390.632026-10-29T01:28:37Z
2026-12-21 → 2026-12-31Delta Air LinesDL1571 + DL1695 / DL5618 + DL4715$412.502026-10-29T01:28:37Z

2026-12-21 → 2026-12-31 · $400.00

  • United Airlines UA4454: STL 2026-12-21 13:17:00 → IAD 2026-12-21 16:22:00; nonstop; 125 minutes. Local airport times.
  • United Airlines UA4427: IAD 2026-12-31 08:35:00 → STL 2026-12-31 10:08:00; nonstop; 153 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $312.50

  • Frontier Airlines F94474 / F94708: STL 2026-12-21 18:21:00 → IAD 2026-12-22 00:51:00; 1 stop(s) via ATL; 330 minutes. Local airport times.
    • F94474: STL 2026-12-21 18:21:00 → ATL 2026-12-21 21:16:00; layover at ATL: 103 minutes.
    • F94708: ATL 2026-12-21 22:59:00 → IAD 2026-12-22 00:51:00.
  • United Airlines UA4427: IAD 2026-12-31 08:35:00 → STL 2026-12-31 10:08:00; nonstop; 153 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $387.50

  • American Airlines AA2486 / AA5317: STL 2026-12-21 12:54:00 → IAD 2026-12-21 19:33:00; 1 stop(s) via CLT; 339 minutes. Local airport times.
    • AA2486: STL 2026-12-21 12:54:00 → CLT 2026-12-21 15:42:00; layover at CLT: 135 minutes.
    • AA5317: CLT 2026-12-21 17:57:00 → IAD 2026-12-21 19:33:00.
  • American Airlines AA5649 / AA2486: IAD 2026-12-31 06:00:00 → STL 2026-12-31 10:19:00; 1 stop(s) via CLT; 319 minutes. Local airport times.
    • AA5649: IAD 2026-12-31 06:00:00 → CLT 2026-12-31 07:48:00; layover at CLT: 87 minutes.
    • AA2486: CLT 2026-12-31 09:15:00 → STL 2026-12-31 10:19:00.

2026-12-21 → 2026-12-31 · $412.50

  • Delta Air Lines DL2868 / DL5413: STL 2026-12-21 10:14:00 → IAD 2026-12-21 16:18:00; 1 stop(s) via DTW; 304 minutes. Local airport times.
    • DL2868: STL 2026-12-21 10:14:00 → DTW 2026-12-21 12:46:00; layover at DTW: 119 minutes.
    • DL5413: DTW 2026-12-21 14:45:00 → IAD 2026-12-21 16:18:00.
  • Delta Air Lines DL5618 / DL4715: IAD 2026-12-31 12:35:00 → STL 2026-12-31 17:06:00; 1 stop(s) via JFK; 331 minutes. Local airport times.
    • DL5618: IAD 2026-12-31 12:35:00 → JFK 2026-12-31 14:01:00; layover at JFK: 69 minutes.
    • DL4715: JFK 2026-12-31 15:10:00 → STL 2026-12-31 17:06:00.

2026-12-21 → 2026-12-31 · $400.00

  • United Airlines UA4406: STL 2026-12-21 08:30:00 → IAD 2026-12-21 11:35:00; nonstop; 125 minutes. Local airport times.
  • United Airlines UA4427: IAD 2026-12-31 08:35:00 → STL 2026-12-31 10:08:00; nonstop; 153 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $390.63

  • United Airlines UA4397 / UA1779: STL 2026-12-21 18:55:00 → IAD 2026-12-22 00:30:00; 1 stop(s) via ORD; 275 minutes. Local airport times.
    • UA4397: STL 2026-12-21 18:55:00 → ORD 2026-12-21 20:25:00; layover at ORD: 76 minutes.
    • UA1779: ORD 2026-12-21 21:41:00 → IAD 2026-12-22 00:30:00.
  • United Airlines UA4427: IAD 2026-12-31 08:35:00 → STL 2026-12-31 10:08:00; nonstop; 153 minutes. Local airport times.

2026-12-21 → 2026-12-31 · $412.50

  • Delta Air Lines DL1571 / DL1695: STL 2026-12-21 10:06:00 → IAD 2026-12-21 16:02:00; 1 stop(s) via ATL; 296 minutes. Local airport times.
    • DL1571: STL 2026-12-21 10:06:00 → ATL 2026-12-21 12:36:00; layover at ATL: 105 minutes.
    • DL1695: ATL 2026-12-21 14:21:00 → IAD 2026-12-21 16:02:00.
  • Delta Air Lines DL5618 / DL4715: IAD 2026-12-31 12:35:00 → STL 2026-12-31 17:06:00; 1 stop(s) via JFK; 331 minutes. Local airport times.
    • DL5618: IAD 2026-12-31 12:35:00 → JFK 2026-12-31 14:01:00; layover at JFK: 69 minutes.
    • DL4715: JFK 2026-12-31 15:10:00 → STL 2026-12-31 17:06:00.

More dates for this route