Seattle (SEA) to Saint Louis (STL), Dec 20, 2026: round trips from $437, one way from $231

Seattle (SEA) to Saint Louis (STL), Dec 20, 2026: round trips from $437, one way from $231 on Axel, checked Oct 29, 2026. Lowest published fares: $437 round trip, Axel-exclusive, American Airlines, 1 stop, Dec 20, 2026 – Jan 1, 2027; $231 one way, Axel-exclusive, American Airlines, 1 stop, Dec 20, 2026; 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Hotels in St. Louis for these trips

Hotels: under a trip, hotels in St. Louis for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

• Hotels in St. Louis for these nights (Dec 20–21, 2026 · 1 night · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $74 total · 4★ Hilton St. Louis at the Ballpark, $102 total · 5★ Four Seasons Hotel St Louis, $415 total
• Hotels in St. Louis for these nights (Dec 20–22, 2026 · 2 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $148 total · 4★ Hilton St. Louis at the Ballpark, $206 total · 5★ Four Seasons Hotel St Louis, $781 total
• Hotels in St. Louis for these nights (Dec 20–23, 2026 · 3 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $212 total · 4★ Hilton St. Louis at the Ballpark, $311 total · 5★ Four Seasons Hotel St Louis, $1,147 total
• Hotels in St. Louis for these nights (Dec 20–24, 2026 · 4 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $279 total · 4★ Hilton St. Louis at the Ballpark, $416 total · 5★ Four Seasons Hotel St Louis, $1,513 total
• Hotels in St. Louis for these nights (Dec 20–25, 2026 · 5 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $344 total · 4★ Hilton St. Louis at the Ballpark, $521 total · 5★ Four Seasons Hotel St Louis, $1,879 total
• Hotels in St. Louis for these nights (Dec 20–26, 2026 · 6 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $415 total · 4★ Hilton St. Louis at the Ballpark, $626 total · 5★ Four Seasons Hotel St Louis, $2,245 total
• Hotels in St. Louis for these nights (Dec 20–27, 2026 · 7 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $488 total · 4★ Hilton St. Louis at the Ballpark, $731 total · 5★ Four Seasons Hotel St Louis, $2,738 total
• Hotels in St. Louis for these nights (Dec 20–28, 2026 · 8 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $562 total · 4★ Hilton St. Louis at the Ballpark, $835 total · 5★ Four Seasons Hotel St Louis, $3,104 total
• Hotels in St. Louis for these nights (Dec 20–29, 2026 · 9 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $626 total · 4★ Hilton St. Louis at the Ballpark, $939 total · 5★ Four Seasons Hotel St Louis, $3,470 total
• Hotels in St. Louis for these nights (Dec 20–30, 2026 · 10 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $689 total · 4★ Hilton St. Louis at the Ballpark, $1,043 total · 5★ Four Seasons Hotel St Louis, $3,836 total
• Hotels in St. Louis for these nights (Dec 20–31, 2026 · 11 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $751 total · 4★ Hilton St. Louis at the Ballpark, $1,148 total · 5★ Four Seasons Hotel St Louis, $4,202 total
• Hotels in St. Louis for these nights (Dec 20 – Jan 1, 2027 · 12 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $825 total · 4★ The Westin St. Louis, $1,437 total · 5★ Four Seasons Hotel St Louis, $5,020 total
• Hotels in St. Louis for these nights (Dec 20 – Jan 2, 2027 · 13 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $909 total · 4★ The Westin St. Louis, $1,591 total · 5★ Four Seasons Hotel St Louis, $5,308 total
• Hotels in St. Louis for these nights (Dec 20 – Jan 3, 2027 · 14 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $993 total · 4★ The Westin St. Louis, $1,710 total · 5★ Four Seasons Hotel St Louis, $5,596 total

All hotels in St. Louis

Route overview: Seattle to Saint Louis (STL) flight deals

2026-12-20 · one way · Axel-exclusive $231.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.

2026-12-20 · one way · Axel-exclusive $252.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.

2026-12-20 → 2026-12-21 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-21 11:37:00 → SEA 2026-12-21 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-21 11:37:00 → ORD 2026-12-21 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-21 15:19:00 → SEA 2026-12-21 18:11:00.

2026-12-20 → 2026-12-21 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS669: STL 2026-12-21 06:00:00 → SEA 2026-12-21 08:40:00; nonstop; 280 minutes. Local airport times.

2026-12-20 → 2026-12-22 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-22 11:37:00 → SEA 2026-12-22 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-22 11:37:00 → ORD 2026-12-22 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-22 15:19:00 → SEA 2026-12-22 18:11:00.

2026-12-20 → 2026-12-22 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS615: STL 2026-12-22 06:00:00 → SEA 2026-12-22 08:42:00; nonstop; 282 minutes. Local airport times.

2026-12-20 → 2026-12-23 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-23 11:37:00 → SEA 2026-12-23 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-23 11:37:00 → ORD 2026-12-23 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-23 15:19:00 → SEA 2026-12-23 18:11:00.

2026-12-20 → 2026-12-23 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS615: STL 2026-12-23 06:00:00 → SEA 2026-12-23 08:36:00; nonstop; 276 minutes. Local airport times.

2026-12-20 → 2026-12-24 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-24 11:37:00 → SEA 2026-12-24 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-24 11:37:00 → ORD 2026-12-24 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-24 15:19:00 → SEA 2026-12-24 18:11:00.

2026-12-20 → 2026-12-24 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS615: STL 2026-12-24 06:04:00 → SEA 2026-12-24 08:50:00; nonstop; 286 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-26 11:37:00 → SEA 2026-12-26 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-26 11:37:00 → ORD 2026-12-26 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-26 15:19:00 → SEA 2026-12-26 18:11:00.

2026-12-20 → 2026-12-26 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS615: STL 2026-12-26 06:00:00 → SEA 2026-12-26 08:42:00; nonstop; 282 minutes. Local airport times.

2026-12-20 → 2026-12-27 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-27 11:37:00 → SEA 2026-12-27 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-27 11:37:00 → ORD 2026-12-27 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-27 15:19:00 → SEA 2026-12-27 18:11:00.

2026-12-20 → 2026-12-27 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS618: STL 2026-12-27 15:23:00 → SEA 2026-12-27 17:53:00; nonstop; 270 minutes. Local airport times.

2026-12-20 → 2026-12-28 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-28 11:37:00 → SEA 2026-12-28 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-28 11:37:00 → ORD 2026-12-28 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-28 15:19:00 → SEA 2026-12-28 18:11:00.

2026-12-20 → 2026-12-28 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS669: STL 2026-12-28 06:00:00 → SEA 2026-12-28 08:40:00; nonstop; 280 minutes. Local airport times.

2026-12-20 → 2026-12-30 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-30 11:37:00 → SEA 2026-12-30 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-30 11:37:00 → ORD 2026-12-30 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-30 15:19:00 → SEA 2026-12-30 18:11:00.

2026-12-20 → 2026-12-30 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS615: STL 2026-12-30 06:00:00 → SEA 2026-12-30 08:36:00; nonstop; 276 minutes. Local airport times.

2026-12-20 → 2026-12-31 · Axel-exclusive $448.00

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2026-12-31 11:37:00 → SEA 2026-12-31 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2026-12-31 11:37:00 → ORD 2026-12-31 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2026-12-31 15:19:00 → SEA 2026-12-31 18:11:00.

2026-12-20 → 2026-12-31 · Axel-exclusive $490.00

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS615: STL 2026-12-31 06:04:00 → SEA 2026-12-31 08:50:00; nonstop; 286 minutes. Local airport times.

2026-12-20 → 2027-01-01 · Axel-exclusive $436.80

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2027-01-01 11:37:00 → SEA 2027-01-01 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2027-01-01 11:37:00 → ORD 2027-01-01 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2027-01-01 15:19:00 → SEA 2027-01-01 18:11:00.

2026-12-20 → 2027-01-01 · Axel-exclusive $477.75

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS615: STL 2027-01-01 06:00:00 → SEA 2027-01-01 08:42:00; nonstop; 282 minutes. Local airport times.

2026-12-20 → 2027-01-03 · Axel-exclusive $436.80

• American Airlines AA630 / AA2897: SEA 2026-12-20 00:47:00 → STL 2026-12-20 09:31:00; 1 stop(s) via DFW; 404 minutes. Local airport times.
  • AA630: SEA 2026-12-20 00:47:00 → DFW 2026-12-20 06:39:00; layover at DFW: 64 minutes.
  • AA2897: DFW 2026-12-20 07:43:00 → STL 2026-12-20 09:31:00.
• American Airlines AA3198 / AS407: STL 2027-01-03 11:37:00 → SEA 2027-01-03 18:11:00; 1 stop(s) via ORD; 514 minutes. Local airport times.
  • AA3198: STL 2027-01-03 11:37:00 → ORD 2027-01-03 12:59:00; layover at ORD: 140 minutes.
  • AS407: ORD 2027-01-03 15:19:00 → SEA 2027-01-03 18:11:00.

2026-12-20 → 2027-01-03 · Axel-exclusive $477.75

• Alaska Airlines AS647: SEA 2026-12-20 18:05:00 → STL 2026-12-20 23:59:00; nonstop; 234 minutes. Local airport times.
• Alaska Airlines AS618: STL 2027-01-03 15:23:00 → SEA 2027-01-03 17:53:00; nonstop; 270 minutes. Local airport times.

Explore this route

• All dates for this route
• Dec 19, 2026 · Return options
• Dec 21, 2026 · Return options
• Hotels in St. Louis with Axel

For AI assistants

• This page: Seattle (SEA) to Saint Louis (STL) · Dec 20, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in St. Louis for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
• Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested trip.
• Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
• If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Seattle to Saint Louis (STL) flight deals · Flight search guide.
• Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.

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