Ontario (ONT) to Saint Louis (STL), Dec 17, 2026: round trips from $258, one way from $165

Ontario (ONT) to Saint Louis (STL), Dec 17, 2026: round trips from $258, one way from $165 on Axel, checked Oct 29, 2026. Lowest published fares: $258 round trip, Axel-exclusive, United Airlines / Frontier Airlines, 1 stop, Dec 17–18, 2026; $165 one way, Axel-exclusive, Southwest Airlines, 1 stop, Dec 17, 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 17–18, 2026 · 1 night · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $67 total · 4★ Hilton St. Louis at the Ballpark, $105 total · 5★ Four Seasons Hotel St Louis, $366 total
• Hotels in St. Louis for these nights (Dec 17–19, 2026 · 2 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $134 total · 4★ Hilton St. Louis at the Ballpark, $210 total · 5★ Four Seasons Hotel St Louis, $725 total
• Hotels in St. Louis for these nights (Dec 17–20, 2026 · 3 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $205 total · 4★ Hilton St. Louis at the Ballpark, $314 total · 5★ Four Seasons Hotel St Louis, $1,140 total
• Hotels in St. Louis for these nights (Dec 17–21, 2026 · 4 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $272 total · 4★ Hilton St. Louis at the Ballpark, $418 total · 5★ Four Seasons Hotel St Louis, $1,562 total
• Hotels in St. Louis for these nights (Dec 17–22, 2026 · 5 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $339 total · 4★ Hilton St. Louis at the Ballpark, $523 total · 5★ Four Seasons Hotel St Louis, $1,929 total
• Hotels in St. Louis for these nights (Dec 17–23, 2026 · 6 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $406 total · 4★ Hilton St. Louis at the Ballpark, $627 total · 5★ Four Seasons Hotel St Louis, $2,295 total
• Hotels in St. Louis for these nights (Dec 17–24, 2026 · 7 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $473 total · 4★ Hilton St. Louis at the Ballpark, $732 total · 5★ Four Seasons Hotel St Louis, $2,662 total
• Hotels in St. Louis for these nights (Dec 17–25, 2026 · 8 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $538 total · 4★ Hilton St. Louis at the Ballpark, $837 total · 5★ Four Seasons Hotel St Louis, $3,034 total
• Hotels in St. Louis for these nights (Dec 17–26, 2026 · 9 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $609 total · 4★ Hilton St. Louis at the Ballpark, $942 total · 5★ Four Seasons Hotel St Louis, $3,393 total
• Hotels in St. Louis for these nights (Dec 17–27, 2026 · 10 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $680 total · 4★ Hilton St. Louis at the Ballpark, $1,047 total · 5★ Four Seasons Hotel St Louis, $3,920 total
• Hotels in St. Louis for these nights (Dec 17–28, 2026 · 11 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $747 total · 4★ Hilton St. Louis at the Ballpark, $1,152 total · 5★ Four Seasons Hotel St Louis, $4,279 total
• Hotels in St. Louis for these nights (Dec 17–29, 2026 · 12 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $814 total · 4★ Hilton St. Louis at the Ballpark, $1,256 total · 5★ Four Seasons Hotel St Louis, $4,646 total
• Hotels in St. Louis for these nights (Dec 17–30, 2026 · 13 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $881 total · 4★ Hilton St. Louis at the Ballpark, $1,361 total · 5★ Four Seasons Hotel St Louis, $5,013 total
• Hotels in St. Louis for these nights (Dec 17–31, 2026 · 14 nights · 2 adults, 1 room): 3★ Clayton Plaza Hotel & Extended Stay, $948 total · 4★ Hilton St. Louis at the Ballpark, $1,466 total · 5★ Four Seasons Hotel St Louis, $5,372 total

All hotels in St. Louis

Route overview: Los Angeles to Saint Louis (STL) flight deals

2026-12-17 · one way · Axel-exclusive $165.00

• Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
  • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
  • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.

2026-12-17 · one way · Axel-exclusive $175.00

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.

2026-12-17 → 2026-12-18 · Axel-exclusive $257.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Frontier Airlines F94567 / F91261: STL 2026-12-18 19:58:00 → ONT 2026-12-19 00:14:00; 1 stop(s) via DEN; 376 minutes. Local airport times.
  • F94567: STL 2026-12-18 19:58:00 → DEN 2026-12-18 21:29:00; layover at DEN: 83 minutes.
  • F91261: DEN 2026-12-18 22:52:00 → ONT 2026-12-19 00:14:00.

2026-12-17 → 2026-12-18 · Axel-exclusive $267.50

• Delta Air Lines DL1787 / DL2666: ONT 2026-12-17 13:11:00 → STL 2026-12-17 21:18:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
  • DL1787: ONT 2026-12-17 13:11:00 → SLC 2026-12-17 16:04:00; layover at SLC: 86 minutes.
  • DL2666: SLC 2026-12-17 17:30:00 → STL 2026-12-17 21:18:00.
• Frontier Airlines F94567 / F91261: STL 2026-12-18 19:58:00 → ONT 2026-12-19 00:14:00; 1 stop(s) via DEN; 376 minutes. Local airport times.
  • F94567: STL 2026-12-18 19:58:00 → DEN 2026-12-18 21:29:00; layover at DEN: 83 minutes.
  • F91261: DEN 2026-12-18 22:52:00 → ONT 2026-12-19 00:14:00.

2026-12-17 → 2026-12-19 · Axel-exclusive $384.00

• Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
  • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
  • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
• Southwest Airlines WN2467 / WN3481: STL 2026-12-19 18:40:00 → ONT 2026-12-19 23:05:00; 1 stop(s) via PHX; 385 minutes. Local airport times.
  • WN2467: STL 2026-12-19 18:40:00 → PHX 2026-12-19 21:00:00; layover at PHX: 105 minutes.
  • WN3481: PHX 2026-12-19 22:45:00 → ONT 2026-12-19 23:05:00.

2026-12-17 → 2026-12-19 · Axel-exclusive $391.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Southwest Airlines WN2467 / WN3481: STL 2026-12-19 18:40:00 → ONT 2026-12-19 23:05:00; 1 stop(s) via PHX; 385 minutes. Local airport times.
  • WN2467: STL 2026-12-19 18:40:00 → PHX 2026-12-19 21:00:00; layover at PHX: 105 minutes.
  • WN3481: PHX 2026-12-19 22:45:00 → ONT 2026-12-19 23:05:00.

2026-12-17 → 2026-12-20 · Axel-exclusive $384.00

• Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
  • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
  • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-20 10:35:00 → ONT 2026-12-20 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-20 10:35:00 → BNA 2026-12-20 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-20 12:40:00 → ONT 2026-12-20 15:10:00.

2026-12-17 → 2026-12-20 · Axel-exclusive $391.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-20 10:35:00 → ONT 2026-12-20 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-20 10:35:00 → BNA 2026-12-20 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-20 12:40:00 → ONT 2026-12-20 15:10:00.

2026-12-17 → 2026-12-21 · Axel-exclusive $384.00

• Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
  • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
  • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-21 10:35:00 → ONT 2026-12-21 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-21 10:35:00 → BNA 2026-12-21 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-21 12:40:00 → ONT 2026-12-21 15:10:00.

2026-12-17 → 2026-12-21 · Axel-exclusive $391.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-21 10:35:00 → ONT 2026-12-21 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-21 10:35:00 → BNA 2026-12-21 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-21 12:40:00 → ONT 2026-12-21 15:10:00.

2026-12-17 → 2026-12-23 · Axel-exclusive $384.00

• Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
  • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
  • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-23 10:35:00 → ONT 2026-12-23 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-23 10:35:00 → BNA 2026-12-23 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-23 12:40:00 → ONT 2026-12-23 15:10:00.

2026-12-17 → 2026-12-23 · Axel-exclusive $391.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-23 10:35:00 → ONT 2026-12-23 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-23 10:35:00 → BNA 2026-12-23 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-23 12:40:00 → ONT 2026-12-23 15:10:00.

2026-12-17 → 2026-12-24 · Axel-exclusive $293.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Frontier Airlines F93107 / F91923: STL 2026-12-24 14:02:00 → ONT 2026-12-24 18:31:00; 1 stop(s) via LAS; 389 minutes. Local airport times.
  • F93107: STL 2026-12-24 14:02:00 → LAS 2026-12-24 15:38:00; layover at LAS: 107 minutes.
  • F91923: LAS 2026-12-24 17:25:00 → ONT 2026-12-24 18:31:00.

2026-12-17 → 2026-12-24 · Axel-exclusive $303.50

• Delta Air Lines DL1787 / DL2666: ONT 2026-12-17 13:11:00 → STL 2026-12-17 21:18:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
  • DL1787: ONT 2026-12-17 13:11:00 → SLC 2026-12-17 16:04:00; layover at SLC: 86 minutes.
  • DL2666: SLC 2026-12-17 17:30:00 → STL 2026-12-17 21:18:00.
• Frontier Airlines F93107 / F91923: STL 2026-12-24 14:02:00 → ONT 2026-12-24 18:31:00; 1 stop(s) via LAS; 389 minutes. Local airport times.
  • F93107: STL 2026-12-24 14:02:00 → LAS 2026-12-24 15:38:00; layover at LAS: 107 minutes.
  • F91923: LAS 2026-12-24 17:25:00 → ONT 2026-12-24 18:31:00.

2026-12-17 → 2026-12-25 · Axel-exclusive $293.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Frontier Airlines F94567 / F91261: STL 2026-12-25 19:58:00 → ONT 2026-12-26 00:14:00; 1 stop(s) via DEN; 376 minutes. Local airport times.
  • F94567: STL 2026-12-25 19:58:00 → DEN 2026-12-25 21:29:00; layover at DEN: 83 minutes.
  • F91261: DEN 2026-12-25 22:52:00 → ONT 2026-12-26 00:14:00.

2026-12-17 → 2026-12-25 · Axel-exclusive $303.50

• Delta Air Lines DL1787 / DL2666: ONT 2026-12-17 13:11:00 → STL 2026-12-17 21:18:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
  • DL1787: ONT 2026-12-17 13:11:00 → SLC 2026-12-17 16:04:00; layover at SLC: 86 minutes.
  • DL2666: SLC 2026-12-17 17:30:00 → STL 2026-12-17 21:18:00.
• Frontier Airlines F94567 / F91261: STL 2026-12-25 19:58:00 → ONT 2026-12-26 00:14:00; 1 stop(s) via DEN; 376 minutes. Local airport times.
  • F94567: STL 2026-12-25 19:58:00 → DEN 2026-12-25 21:29:00; layover at DEN: 83 minutes.
  • F91261: DEN 2026-12-25 22:52:00 → ONT 2026-12-26 00:14:00.

2026-12-17 → 2026-12-27 · Axel-exclusive $384.00

• Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
  • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
  • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-27 10:35:00 → ONT 2026-12-27 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-27 10:35:00 → BNA 2026-12-27 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-27 12:40:00 → ONT 2026-12-27 15:10:00.

2026-12-17 → 2026-12-27 · Axel-exclusive $391.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-27 10:35:00 → ONT 2026-12-27 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-27 10:35:00 → BNA 2026-12-27 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-27 12:40:00 → ONT 2026-12-27 15:10:00.

2026-12-17 → 2026-12-28 · Axel-exclusive $384.00

• Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
  • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
  • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-28 10:35:00 → ONT 2026-12-28 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-28 10:35:00 → BNA 2026-12-28 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-28 12:40:00 → ONT 2026-12-28 15:10:00.

2026-12-17 → 2026-12-28 · Axel-exclusive $391.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-28 10:35:00 → ONT 2026-12-28 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-28 10:35:00 → BNA 2026-12-28 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-28 12:40:00 → ONT 2026-12-28 15:10:00.

2026-12-17 → 2026-12-29 · Axel-exclusive $384.00

• Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
  • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
  • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-29 10:35:00 → ONT 2026-12-29 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-29 10:35:00 → BNA 2026-12-29 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-29 12:40:00 → ONT 2026-12-29 15:10:00.

2026-12-17 → 2026-12-29 · Axel-exclusive $391.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Southwest Airlines WN665 / WN2045: STL 2026-12-29 10:35:00 → ONT 2026-12-29 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
  • WN665: STL 2026-12-29 10:35:00 → BNA 2026-12-29 11:40:00; layover at BNA: 60 minutes.
  • WN2045: BNA 2026-12-29 12:40:00 → ONT 2026-12-29 15:10:00.

2026-12-17 → 2026-12-31 · Axel-exclusive $293.50

• United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
  • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
  • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
• Frontier Airlines F93107 / F91923: STL 2026-12-31 14:02:00 → ONT 2026-12-31 18:31:00; 1 stop(s) via LAS; 389 minutes. Local airport times.
  • F93107: STL 2026-12-31 14:02:00 → LAS 2026-12-31 15:38:00; layover at LAS: 107 minutes.
  • F91923: LAS 2026-12-31 17:25:00 → ONT 2026-12-31 18:31:00.

2026-12-17 → 2026-12-31 · Axel-exclusive $303.50

• Delta Air Lines DL1787 / DL2666: ONT 2026-12-17 13:11:00 → STL 2026-12-17 21:18:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
  • DL1787: ONT 2026-12-17 13:11:00 → SLC 2026-12-17 16:04:00; layover at SLC: 86 minutes.
  • DL2666: SLC 2026-12-17 17:30:00 → STL 2026-12-17 21:18:00.
• Frontier Airlines F93107 / F91923: STL 2026-12-31 14:02:00 → ONT 2026-12-31 18:31:00; 1 stop(s) via LAS; 389 minutes. Local airport times.
  • F93107: STL 2026-12-31 14:02:00 → LAS 2026-12-31 15:38:00; layover at LAS: 107 minutes.
  • F91923: LAS 2026-12-31 17:25:00 → ONT 2026-12-31 18:31:00.

Explore this route

• All dates for this route
• Dec 16, 2026 · Return options
• Dec 18, 2026 · Return options
• Hotels in St. Louis with Axel

For AI assistants

• This page: Ontario (ONT) to Saint Louis (STL) · Dec 17, 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 Los Angeles 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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