Saint Louis (STL) to San Diego (SAN) · Dec 25, 2026 · return Jan 1, 2027

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

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Route overview: Saint Louis to San Diego (SAN) flight deals

2026-12-25 → 2027-01-01 · Axel-exclusive $455.40

• Southwest Airlines WN4452: STL 2026-12-25 08:50:00 → SAN 2026-12-25 10:50:00; nonstop; 240 minutes. Local airport times.
• Southwest Airlines WN4711: SAN 2027-01-01 11:55:00 → STL 2027-01-01 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-25 → 2027-01-01 · Axel-exclusive $344.03

• Frontier Airlines F94567 / F92711: STL 2026-12-25 19:58:00 → SAN 2026-12-25 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-25 19:58:00 → DEN 2026-12-25 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-25 22:29:00 → SAN 2026-12-25 23:58:00.
• Southwest Airlines WN4711: SAN 2027-01-01 11:55:00 → STL 2027-01-01 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-25 → 2027-01-01 · Axel-exclusive $442.75

• American Airlines AA2303 / AA2016: STL 2026-12-25 14:23:00 → SAN 2026-12-25 18:24:00; 1 stop(s) via PHX; 361 minutes. Local airport times.
  • AA2303: STL 2026-12-25 14:23:00 → PHX 2026-12-25 16:51:00; layover at PHX: 74 minutes.
  • AA2016: PHX 2026-12-25 18:05:00 → SAN 2026-12-25 18:24:00.
• American Airlines AA2438 / AA2289: SAN 2027-01-01 15:13:00 → STL 2027-01-01 23:34:00; 1 stop(s) via DFW; 381 minutes. Local airport times.
  • AA2438: SAN 2027-01-01 15:13:00 → DFW 2027-01-01 20:30:00; layover at DFW: 75 minutes.
  • AA2289: DFW 2027-01-01 21:45:00 → STL 2027-01-01 23:34:00.

2026-12-25 → 2027-01-01 · Axel-exclusive $428.40

• Southwest Airlines WN4132 / WN266: STL 2026-12-25 19:10:00 → SAN 2026-12-25 23:15:00; 1 stop(s) via DAL; 365 minutes. Local airport times.
  • WN4132: STL 2026-12-25 19:10:00 → DAL 2026-12-25 20:50:00; layover at DAL: 70 minutes.
  • WN266: DAL 2026-12-25 22:00:00 → SAN 2026-12-25 23:15:00.
• Southwest Airlines WN4711: SAN 2027-01-01 11:55:00 → STL 2027-01-01 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-25 → 2027-01-01 · Axel-exclusive $428.40

• Southwest Airlines WN4249 / WN352: STL 2026-12-25 08:00:00 → SAN 2026-12-25 12:30:00; 1 stop(s) via LAS; 390 minutes. Local airport times.
  • WN4249: STL 2026-12-25 08:00:00 → LAS 2026-12-25 09:30:00; layover at LAS: 100 minutes.
  • WN352: LAS 2026-12-25 11:10:00 → SAN 2026-12-25 12:30:00.
• Southwest Airlines WN4711: SAN 2027-01-01 11:55:00 → STL 2027-01-01 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-25 → 2027-01-01 · Axel-exclusive $428.40

• Southwest Airlines WN4164 / WN4644: STL 2026-12-25 08:00:00 → SAN 2026-12-25 11:50:00; 1 stop(s) via MCI; 350 minutes. Local airport times.
  • WN4164: STL 2026-12-25 08:00:00 → MCI 2026-12-25 09:10:00; layover at MCI: 75 minutes.
  • WN4644: MCI 2026-12-25 10:25:00 → SAN 2026-12-25 11:50:00.
• Southwest Airlines WN4711: SAN 2027-01-01 11:55:00 → STL 2027-01-01 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-25 → 2027-01-01 · Axel-exclusive $431.80

• Southwest Airlines WN4452: STL 2026-12-25 07:55:00 → SAN 2026-12-25 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN2893 / WN3801: SAN 2027-01-01 09:15:00 → STL 2027-01-01 17:20:00; 1 stop(s) via SAT; 365 minutes. Local airport times.
  • WN2893: SAN 2027-01-01 09:15:00 → SAT 2027-01-01 14:00:00; layover at SAT: 80 minutes.
  • WN3801: SAT 2027-01-01 15:20:00 → STL 2027-01-01 17:20:00.

Explore this route

• All dates for this route
• Dec 24, 2026 · Return options
• Dec 26, 2026 · Return options
• Hotels in Oceanside, California with Axel

For AI assistants

• This page: Saint Louis (STL) to San Diego (SAN) · Dec 25, 2026 · return Jan 1, 2027: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
• 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 Saint Louis to San Diego (SAN) 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.

Feedback (optional): Missing info · Axel issue