Saint Louis (STL) to San Diego (SAN), Dec 26, 2026: round trips from $298, one way from $142

Saint Louis (STL) to San Diego (SAN), Dec 26, 2026: round trips from $298, one way from $142 on Axel, checked Oct 29, 2026. Lowest published fares: $298 round trip, Axel-exclusive, Frontier Airlines / American Airlines, 1 stop, Dec 26, 2026 – Jan 7, 2027; $142 one way, Axel-exclusive, Frontier Airlines, 1 stop, Dec 26, 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 Oceanside, California for these trips

Hotels: under a trip, hotels in Oceanside, California 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 Oceanside, California for these nights (Dec 26–27, 2026 · 1 night · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $132 total · 4★ Carlsbad Inn Beach Resort, $350 total
• Hotels in Oceanside, California for these nights (Dec 26–28, 2026 · 2 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $239 total · 4★ Carlsbad Inn Beach Resort, $672 total
• Hotels in Oceanside, California for these nights (Dec 26–29, 2026 · 3 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $346 total · 4★ Carlsbad Inn Beach Resort, $987 total
• Hotels in Oceanside, California for these nights (Dec 26–30, 2026 · 4 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $455 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $1,302 total
• Hotels in Oceanside, California for these nights (Dec 26–31, 2026 · 5 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $566 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $1,616 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 1, 2027 · 6 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $693 total · 4★ Carlsbad Inn Beach Resort, $1,980 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 2, 2027 · 7 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $812 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $2,335 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 3, 2027 · 8 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $928 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $2,672 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 4, 2027 · 9 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,030 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $2,896 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 5, 2027 · 10 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,132 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $3,143 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 6, 2027 · 11 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,234 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $3,390 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 7, 2027 · 12 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,336 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $3,637 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 8, 2027 · 13 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,439 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $3,912 total
• Hotels in Oceanside, California for these nights (Dec 26 – Jan 9, 2027 · 14 nights · 2 adults, 1 room): 3★ Best Western Plus Oceanside Palms, $1,605 total · 4★ SpringHill Suites by Marriott Oceanside Beach, $4,362 total

All hotels in Oceanside, California

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

2026-12-26 · one way · Axel-exclusive $141.75

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.

2026-12-26 · one way · Axel-exclusive $256.50

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.

2026-12-26 → 2026-12-27 · Axel-exclusive $374.63

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• Southwest Airlines WN3823: SAN 2026-12-27 18:20:00 → STL 2026-12-27 23:45:00; nonstop; 205 minutes. Local airport times.

2026-12-26 → 2026-12-27 · Axel-exclusive $486.00

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN3823: SAN 2026-12-27 18:20:00 → STL 2026-12-27 23:45:00; nonstop; 205 minutes. Local airport times.

2026-12-26 → 2026-12-28 · Axel-exclusive $350.38

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• American Airlines AA2438 / AA2289: SAN 2026-12-28 15:13:00 → STL 2026-12-28 23:34:00; 1 stop(s) via DFW; 381 minutes. Local airport times.
  • AA2438: SAN 2026-12-28 15:13:00 → DFW 2026-12-28 20:30:00; layover at DFW: 75 minutes.
  • AA2289: DFW 2026-12-28 21:45:00 → STL 2026-12-28 23:34:00.

2026-12-26 → 2026-12-28 · Axel-exclusive $443.00

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN2227 / WN1498: SAN 2026-12-28 13:25:00 → STL 2026-12-28 21:10:00; 1 stop(s) via DAL; 345 minutes. Local airport times.
  • WN2227: SAN 2026-12-28 13:25:00 → DAL 2026-12-28 18:20:00; layover at DAL: 60 minutes.
  • WN1498: DAL 2026-12-28 19:20:00 → STL 2026-12-28 21:10:00.

2026-12-26 → 2026-12-29 · Axel-exclusive $356.63

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• Southwest Airlines WN4711: SAN 2026-12-29 11:55:00 → STL 2026-12-29 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2026-12-29 · Axel-exclusive $468.00

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN4711: SAN 2026-12-29 11:55:00 → STL 2026-12-29 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2026-12-30 · Axel-exclusive $359.76

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• United Airlines UA2476 / UA1639: SAN 2026-12-30 08:40:00 → STL 2026-12-30 16:57:00; 1 stop(s) via DEN; 377 minutes. Local airport times.
  • UA2476: SAN 2026-12-30 08:40:00 → DEN 2026-12-30 12:06:00; layover at DEN: 109 minutes.
  • UA1639: DEN 2026-12-30 13:55:00 → STL 2026-12-30 16:57:00.

2026-12-26 → 2026-12-30 · Axel-exclusive $468.00

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN4711: SAN 2026-12-30 11:55:00 → STL 2026-12-30 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-01 · Axel-exclusive $344.03

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 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.

2026-12-26 → 2027-01-01 · Axel-exclusive $455.40

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 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.

2026-12-26 → 2027-01-02 · Axel-exclusive $346.98

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• United Airlines UA2476 / UA1639: SAN 2027-01-02 08:40:00 → STL 2027-01-02 16:57:00; 1 stop(s) via DEN; 377 minutes. Local airport times.
  • UA2476: SAN 2027-01-02 08:40:00 → DEN 2027-01-02 12:06:00; layover at DEN: 109 minutes.
  • UA1639: DEN 2027-01-02 13:55:00 → STL 2027-01-02 16:57:00.

2026-12-26 → 2027-01-02 · Axel-exclusive $455.40

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN4711: SAN 2027-01-02 11:55:00 → STL 2027-01-02 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-03 · Axel-exclusive $344.03

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• Southwest Airlines WN3823: SAN 2027-01-03 18:20:00 → STL 2027-01-03 23:45:00; nonstop; 205 minutes. Local airport times.

2026-12-26 → 2027-01-03 · Axel-exclusive $455.40

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN3823: SAN 2027-01-03 18:20:00 → STL 2027-01-03 23:45:00; nonstop; 205 minutes. Local airport times.

2026-12-26 → 2027-01-05 · Axel-exclusive $302.63

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• Southwest Airlines WN4711: SAN 2027-01-05 11:55:00 → STL 2027-01-05 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-05 · Axel-exclusive $414.00

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN4711: SAN 2027-01-05 11:55:00 → STL 2027-01-05 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-06 · Axel-exclusive $305.01

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• United Airlines UA2476 / UA1639: SAN 2027-01-06 08:40:00 → STL 2027-01-06 16:57:00; 1 stop(s) via DEN; 377 minutes. Local airport times.
  • UA2476: SAN 2027-01-06 08:40:00 → DEN 2027-01-06 12:06:00; layover at DEN: 109 minutes.
  • UA1639: DEN 2027-01-06 13:55:00 → STL 2027-01-06 16:57:00.

2026-12-26 → 2027-01-06 · Axel-exclusive $414.00

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN4711: SAN 2027-01-06 11:55:00 → STL 2027-01-06 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-07 · Axel-exclusive $297.88

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• American Airlines AA2438 / AA2289: SAN 2027-01-07 15:13:00 → STL 2027-01-07 23:34:00; 1 stop(s) via DFW; 381 minutes. Local airport times.
  • AA2438: SAN 2027-01-07 15:13:00 → DFW 2027-01-07 20:30:00; layover at DFW: 75 minutes.
  • AA2289: DFW 2027-01-07 21:45:00 → STL 2027-01-07 23:34:00.

2026-12-26 → 2027-01-07 · Axel-exclusive $414.00

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN4711: SAN 2027-01-07 11:55:00 → STL 2027-01-07 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-09 · Axel-exclusive $305.01

• Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
  • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
  • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
• United Airlines UA2476 / UA1639: SAN 2027-01-09 08:40:00 → STL 2027-01-09 16:57:00; 1 stop(s) via DEN; 377 minutes. Local airport times.
  • UA2476: SAN 2027-01-09 08:40:00 → DEN 2027-01-09 12:06:00; layover at DEN: 109 minutes.
  • UA1639: DEN 2027-01-09 13:55:00 → STL 2027-01-09 16:57:00.

2026-12-26 → 2027-01-09 · Axel-exclusive $414.00

• Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
• Southwest Airlines WN4711: SAN 2027-01-09 11:55:00 → STL 2027-01-09 17:25:00; nonstop; 210 minutes. Local airport times.

Explore this route

• All dates for this route
• Dec 25, 2026 · Return options
• Dec 27, 2026 · Return options
• Hotels in Oceanside, California with Axel

For AI assistants

• This page: Saint Louis (STL) to San Diego (SAN) · Dec 26, 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 Oceanside, California 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.
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• 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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