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Seattle → Saint Louis

Dec 13, 2026 · return Dec 18, 2026

SEA → STL1 adulteconomyRound trip

8 flight options · 5 airlines

Nonstop flights

Sun, Dec 13 – Fri, Dec 18

Alaska Airlines
9:16 amSEA
3h 50m
Nonstop
3:06 pmSTL
Alaska Airlines
4:04 pmSTL
4h 40m
Nonstop
6:44 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Fri, Dec 18

Alaska Airlines
6:07 pmSEA
3h 52m
Nonstop
11:59 pmSTL
Alaska Airlines
4:04 pmSTL
4h 40m
Nonstop
6:44 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Sun, Dec 13 – Fri, Dec 18

Southwest Airlines
1:35 pmSEA
5h 35m
DEN · 1h
9:10 pmSTL
Southwest Airlines
5:25 pmSTL
7h 25m
DEN · 1h 45m
10:50 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Fri, Dec 18

American Airlines
12:47 amSEA
6h 44m
DFW · 1h 4m
9:31 amSTL
American Airlines
11:37 amSTL
8h 34m
ORD · 2h 20m
6:11 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Fri, Dec 18

United Airlines
2:30 pmSEA
6h 29m
ORD · 1h 5m
10:59 pmSTL
Alaska Airlines
4:04 pmSTL
4h 40m
Nonstop
6:44 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Fri, Dec 18

Delta Air Lines
1:25 pmSEA
6h 3m
SLC · 1h 9m
9:28 pmSTL
Delta Air Lines
7:08 amSTL
7h 28m
SLC · 1h 39m
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Fri, Dec 18

United Airlines
5:00 amSEA
5h 56m
DEN · 1h 9m
12:56 pmSTL
Alaska Airlines
4:04 pmSTL
4h 40m
Nonstop
6:44 pmSEA

Round-trip total · 1 adult · Taxes included

Sun, Dec 13 – Fri, Dec 18

Delta Air Lines
8:30 amSEA
6h
MSP · 1h 7m
4:30 pmSTL
Delta Air Lines
7:08 amSTL
7h 28m
SLC · 1h 39m
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ STL

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 5, 2026 → Nov 8, 2026Nov 14, 2026 → Nov 21, 2026Nov 24, 2026 → Nov 29, 2026Dec 5, 2026 → Dec 12, 2026Dec 17, 2026 → Dec 20, 2026Dec 26, 2026 → Jan 2, 2027Jan 5, 2027 · One wayJan 16, 2027 → Jan 23, 2027Feb 5, 2027 → Feb 8, 2027Apr 3, 2027 → Apr 10, 2027Jun 26, 2027 → Jul 3, 2027Sep 17, 2027 → Sep 20, 2027
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)
2026-12-13 → 2026-12-18Alaska AirlinesAS314 / AS618$350.002026-10-29T01:16:43Z
2026-12-13 → 2026-12-18Southwest AirlinesWN3823 + WN1844 / WN4144 + WN3141$310.002026-10-29T01:16:43Z
2026-12-13 → 2026-12-18American AirlinesAA630 + AA2897 / AA3198 + AS407$320.002026-10-29T01:16:43Z
2026-12-13 → 2026-12-18United Airlines / Alaska AirlinesUA2340 + UA1114 / AS618$342.502026-10-29T01:16:43Z
2026-12-13 → 2026-12-18Delta Air LinesDL1120 + DL2666 / DL2363 + DL2995$345.002026-10-29T01:16:43Z
2026-12-13 → 2026-12-18Alaska AirlinesAS647 / AS618$350.002026-10-29T01:16:43Z
2026-12-13 → 2026-12-18United Airlines / Alaska AirlinesUA2601 + UA652 / AS618$342.502026-10-29T01:16:43Z
2026-12-13 → 2026-12-18Delta Air LinesDL536 + DL1839 / DL2363 + DL2995$345.002026-10-29T01:16:43Z

2026-12-13 → 2026-12-18 · $350.00

  • Alaska Airlines AS314: SEA 2026-12-13 09:16:00 → STL 2026-12-13 15:06:00; nonstop; 230 minutes. Local airport times.
  • Alaska Airlines AS618: STL 2026-12-18 16:04:00 → SEA 2026-12-18 18:44:00; nonstop; 280 minutes. Local airport times.

2026-12-13 → 2026-12-18 · $310.00

  • Southwest Airlines WN3823 / WN1844: SEA 2026-12-13 13:35:00 → STL 2026-12-13 21:10:00; 1 stop(s) via DEN; 335 minutes. Local airport times.
    • WN3823: SEA 2026-12-13 13:35:00 → DEN 2026-12-13 17:05:00; layover at DEN: 60 minutes.
    • WN1844: DEN 2026-12-13 18:05:00 → STL 2026-12-13 21:10:00.
  • Southwest Airlines WN4144 / WN3141: STL 2026-12-18 17:25:00 → SEA 2026-12-18 22:50:00; 1 stop(s) via DEN; 445 minutes. Local airport times.
    • WN4144: STL 2026-12-18 17:25:00 → DEN 2026-12-18 18:55:00; layover at DEN: 105 minutes.
    • WN3141: DEN 2026-12-18 20:40:00 → SEA 2026-12-18 22:50:00.

2026-12-13 → 2026-12-18 · $320.00

  • American Airlines AA630 / AA2897: SEA 2026-12-13 00:47:00 → STL 2026-12-13 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
    • AA630: SEA 2026-12-13 00:47:00 → DFW 2026-12-13 06:39:00; layover at DFW: 64 minutes.
    • AA2897: DFW 2026-12-13 07:43:00 → STL 2026-12-13 09:31:00.
  • American Airlines AA3198 / AS407: STL 2026-12-18 11:37:00 → SEA 2026-12-18 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
    • AA3198: STL 2026-12-18 11:37:00 → ORD 2026-12-18 12:59:00; layover at ORD: 140 minutes.
    • AS407: ORD 2026-12-18 15:19:00 → SEA 2026-12-18 18:11:00.

2026-12-13 → 2026-12-18 · $342.50

  • United Airlines UA2340 / UA1114: SEA 2026-12-13 14:30:00 → STL 2026-12-13 22:59:00; 1 stop(s) via ORD; 389 minutes. Local airport times.
    • UA2340: SEA 2026-12-13 14:30:00 → ORD 2026-12-13 20:40:00; layover at ORD: 65 minutes.
    • UA1114: ORD 2026-12-13 21:45:00 → STL 2026-12-13 22:59:00.
  • Alaska Airlines AS618: STL 2026-12-18 16:04:00 → SEA 2026-12-18 18:44:00; nonstop; 280 minutes. Local airport times.

2026-12-13 → 2026-12-18 · $345.00

  • Delta Air Lines DL1120 / DL2666: SEA 2026-12-13 13:25:00 → STL 2026-12-13 21:28:00; 1 stop(s) via SLC; 363 minutes. Local airport times.
    • DL1120: SEA 2026-12-13 13:25:00 → SLC 2026-12-13 16:29:00; layover at SLC: 69 minutes.
    • DL2666: SLC 2026-12-13 17:38:00 → STL 2026-12-13 21:28:00.
  • Delta Air Lines DL2363 / DL2995: STL 2026-12-18 07:08:00 → SEA 2026-12-18 12:36:00; 1 stop(s) via SLC; 448 minutes. Local airport times.
    • DL2363: STL 2026-12-18 07:08:00 → SLC 2026-12-18 09:36:00; layover at SLC: 99 minutes.
    • DL2995: SLC 2026-12-18 11:15:00 → SEA 2026-12-18 12:36:00.

2026-12-13 → 2026-12-18 · $350.00

  • Alaska Airlines AS647: SEA 2026-12-13 18:07:00 → STL 2026-12-13 23:59:00; nonstop; 232 minutes. Local airport times.
  • Alaska Airlines AS618: STL 2026-12-18 16:04:00 → SEA 2026-12-18 18:44:00; nonstop; 280 minutes. Local airport times.

2026-12-13 → 2026-12-18 · $342.50

  • United Airlines UA2601 / UA652: SEA 2026-12-13 05:00:00 → STL 2026-12-13 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2601: SEA 2026-12-13 05:00:00 → DEN 2026-12-13 08:41:00; layover at DEN: 69 minutes.
    • UA652: DEN 2026-12-13 09:50:00 → STL 2026-12-13 12:56:00.
  • Alaska Airlines AS618: STL 2026-12-18 16:04:00 → SEA 2026-12-18 18:44:00; nonstop; 280 minutes. Local airport times.

2026-12-13 → 2026-12-18 · $345.00

  • Delta Air Lines DL536 / DL1839: SEA 2026-12-13 08:30:00 → STL 2026-12-13 16:30:00; 1 stop(s) via MSP; 360 minutes. Local airport times.
    • DL536: SEA 2026-12-13 08:30:00 → MSP 2026-12-13 13:48:00; layover at MSP: 67 minutes.
    • DL1839: MSP 2026-12-13 14:55:00 → STL 2026-12-13 16:30:00.
  • Delta Air Lines DL2363 / DL2995: STL 2026-12-18 07:08:00 → SEA 2026-12-18 12:36:00; 1 stop(s) via SLC; 448 minutes. Local airport times.
    • DL2363: STL 2026-12-18 07:08:00 → SLC 2026-12-18 09:36:00; layover at SLC: 99 minutes.
    • DL2995: SLC 2026-12-18 11:15:00 → SEA 2026-12-18 12:36:00.

More dates for this route