Saint Louis (STL) to San Diego (SAN) · Dec 31, 2026 · one way

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

2026-12-31 · one way · Axel-exclusive $237.50

• Southwest Airlines WN4452: STL 2026-12-31 08:50:00 → SAN 2026-12-31 10:50:00; nonstop; 240 minutes. Local airport times.

2026-12-31 · one way · Axel-exclusive $131.25

• Frontier Airlines F94567 / F92711: STL 2026-12-31 19:58:00 → SAN 2026-12-31 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-31 19:58:00 → DEN 2026-12-31 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-31 22:29:00 → SAN 2026-12-31 23:58:00.

2026-12-31 · one way · Axel-exclusive $231.25

• American Airlines AA2303 / AA2016: STL 2026-12-31 14:23:00 → SAN 2026-12-31 18:24:00; 1 stop(s) via PHX; 361 minutes. Local airport times.
  • AA2303: STL 2026-12-31 14:23:00 → PHX 2026-12-31 16:51:00; layover at PHX: 74 minutes.
  • AA2016: PHX 2026-12-31 18:05:00 → SAN 2026-12-31 18:24:00.

2026-12-31 · one way · Axel-exclusive $212.50

• Southwest Airlines WN4164 / WN4644: STL 2026-12-31 08:00:00 → SAN 2026-12-31 11:50:00; 1 stop(s) via MCI; 350 minutes. Local airport times.
  • WN4164: STL 2026-12-31 08:00:00 → MCI 2026-12-31 09:10:00; layover at MCI: 75 minutes.
  • WN4644: MCI 2026-12-31 10:25:00 → SAN 2026-12-31 11:50:00.

2026-12-31 · one way · Axel-exclusive $212.50

• Southwest Airlines WN4249 / WN352: STL 2026-12-31 08:00:00 → SAN 2026-12-31 12:30:00; 1 stop(s) via LAS; 390 minutes. Local airport times.
  • WN4249: STL 2026-12-31 08:00:00 → LAS 2026-12-31 09:30:00; layover at LAS: 100 minutes.
  • WN352: LAS 2026-12-31 11:10:00 → SAN 2026-12-31 12:30:00.

2026-12-31 · one way · Axel-exclusive $212.50

• Southwest Airlines WN3286 / WN920: STL 2026-12-31 08:20:00 → SAN 2026-12-31 12:30:00; 1 stop(s) via OMA; 370 minutes. Local airport times.
  • WN3286: STL 2026-12-31 08:20:00 → OMA 2026-12-31 09:35:00; layover at OMA: 85 minutes.
  • WN920: OMA 2026-12-31 11:00:00 → SAN 2026-12-31 12:30:00.

2026-12-31 · one way · Axel-exclusive $212.50

• Southwest Airlines WN4132 / WN266: STL 2026-12-31 19:10:00 → SAN 2026-12-31 23:15:00; 1 stop(s) via DAL; 365 minutes. Local airport times.
  • WN4132: STL 2026-12-31 19:10:00 → DAL 2026-12-31 20:50:00; layover at DAL: 70 minutes.
  • WN266: DAL 2026-12-31 22:00:00 → SAN 2026-12-31 23:15:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

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For AI assistants

• This page: Saint Louis (STL) to San Diego (SAN) · Dec 31, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
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