Phoenix (PHX) to Saint Louis (STL), Dec 18–20, 2026: from $208 one way

Phoenix (PHX) to Saint Louis (STL), Dec 18–20, 2026: from $208 one way on Axel, checked Oct 29, 2026. Lowest published fare: $208 one way, Axel-exclusive, Southwest Airlines, 1 stop, Dec 18, 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.

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.

2026-12-18 · one way · Axel-exclusive $221.00

• Southwest Airlines WN3524: PHX 2026-12-18 05:45:00 → STL 2026-12-18 09:30:00; nonstop; 165 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $240.50

• American Airlines AA2043: PHX 2026-12-18 19:56:00 → STL 2026-12-18 23:52:00; nonstop; 176 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $240.50

• United Airlines UA333 / UA1422: PHX 2026-12-19 14:50:00 → STL 2026-12-19 20:57:00; 1 stop(s) via DEN; 307 minutes. Local airport times.
  • UA333: PHX 2026-12-19 14:50:00 → DEN 2026-12-19 16:44:00; layover at DEN: 65 minutes.
  • UA1422: DEN 2026-12-19 17:49:00 → STL 2026-12-19 20:57:00.

2026-12-19 · one way · Axel-exclusive $253.50

• Delta Air Lines DL1431 / DL2666: PHX 2026-12-19 14:32:00 → STL 2026-12-19 21:18:00; 1 stop(s) via SLC; 346 minutes. Local airport times.
  • DL1431: PHX 2026-12-19 14:32:00 → SLC 2026-12-19 16:14:00; layover at SLC: 76 minutes.
  • DL2666: SLC 2026-12-19 17:30:00 → STL 2026-12-19 21:18:00.

2026-12-20 · one way · Axel-exclusive $221.00

• Southwest Airlines WN3525: PHX 2026-12-20 10:15:00 → STL 2026-12-20 14:10:00; nonstop; 175 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $221.00

• Southwest Airlines WN1584: PHX 2026-12-19 15:20:00 → STL 2026-12-19 19:10:00; nonstop; 170 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $221.00

• Southwest Airlines WN3525: PHX 2026-12-19 07:50:00 → STL 2026-12-19 11:40:00; nonstop; 170 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $221.00

• Southwest Airlines WN3528: PHX 2026-12-20 20:25:00 → STL 2026-12-21 00:20:00; nonstop; 175 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $221.00

• Southwest Airlines WN3525: PHX 2026-12-18 08:50:00 → STL 2026-12-18 12:40:00; nonstop; 170 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $240.50

• American Airlines AA2043: PHX 2026-12-20 19:56:00 → STL 2026-12-20 23:52:00; nonstop; 176 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $240.50

• American Airlines AA1710: PHX 2026-12-20 09:54:00 → STL 2026-12-20 13:59:00; nonstop; 185 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $240.50

• American Airlines AA2303: PHX 2026-12-18 09:45:00 → STL 2026-12-18 13:51:00; nonstop; 186 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $240.50

• American Airlines AA2303: PHX 2026-12-19 09:37:00 → STL 2026-12-19 13:43:00; nonstop; 186 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $240.50

• American Airlines AA2043: PHX 2026-12-19 19:56:00 → STL 2026-12-19 23:52:00; nonstop; 176 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $208.00

• Southwest Airlines WN3389 / WN438: PHX 2026-12-19 12:45:00 → STL 2026-12-19 19:10:00; 1 stop(s) via AUS; 325 minutes. Local airport times.
  • WN3389: PHX 2026-12-19 12:45:00 → AUS 2026-12-19 15:55:00; layover at AUS: 70 minutes.
  • WN438: AUS 2026-12-19 17:05:00 → STL 2026-12-19 19:10:00.

2026-12-18 · one way · Axel-exclusive $208.00

• Southwest Airlines WN3389 / WN438: PHX 2026-12-18 12:45:00 → STL 2026-12-18 19:10:00; 1 stop(s) via AUS; 325 minutes. Local airport times.
  • WN3389: PHX 2026-12-18 12:45:00 → AUS 2026-12-18 15:55:00; layover at AUS: 70 minutes.
  • WN438: AUS 2026-12-18 17:05:00 → STL 2026-12-18 19:10:00.

2026-12-20 · one way · Axel-exclusive $208.00

• Southwest Airlines WN4838 / WN3801: PHX 2026-12-20 12:05:00 → STL 2026-12-20 19:10:00; 1 stop(s) via SAT; 365 minutes. Local airport times.
  • WN4838: PHX 2026-12-20 12:05:00 → SAT 2026-12-20 15:15:00; layover at SAT: 110 minutes.
  • WN3801: SAT 2026-12-20 17:05:00 → STL 2026-12-20 19:10:00.

2026-12-19 · one way · Axel-exclusive $208.00

• Southwest Airlines WN3353 / WN2715: PHX 2026-12-19 12:05:00 → STL 2026-12-19 19:10:00; 1 stop(s) via MCI; 365 minutes. Local airport times.
  • WN3353: PHX 2026-12-19 12:05:00 → MCI 2026-12-19 15:40:00; layover at MCI: 145 minutes.
  • WN2715: MCI 2026-12-19 18:05:00 → STL 2026-12-19 19:10:00.

2026-12-20 · one way · Axel-exclusive $208.00

• Southwest Airlines WN3353 / WN2715: PHX 2026-12-20 12:05:00 → STL 2026-12-20 19:10:00; 1 stop(s) via MCI; 365 minutes. Local airport times.
  • WN3353: PHX 2026-12-20 12:05:00 → MCI 2026-12-20 15:40:00; layover at MCI: 145 minutes.
  • WN2715: MCI 2026-12-20 18:05:00 → STL 2026-12-20 19:10:00.

2026-12-20 · one way · Axel-exclusive $208.00

• Southwest Airlines WN3389 / WN438: PHX 2026-12-20 12:45:00 → STL 2026-12-20 19:10:00; 1 stop(s) via AUS; 325 minutes. Local airport times.
  • WN3389: PHX 2026-12-20 12:45:00 → AUS 2026-12-20 15:55:00; layover at AUS: 70 minutes.
  • WN438: AUS 2026-12-20 17:05:00 → STL 2026-12-20 19:10:00.

2026-12-19 · one way · Axel-exclusive $208.00

• Southwest Airlines WN4838 / WN3801: PHX 2026-12-19 12:05:00 → STL 2026-12-19 19:10:00; 1 stop(s) via SAT; 365 minutes. Local airport times.
  • WN4838: PHX 2026-12-19 12:05:00 → SAT 2026-12-19 15:15:00; layover at SAT: 110 minutes.
  • WN3801: SAT 2026-12-19 17:05:00 → STL 2026-12-19 19:10:00.

2026-12-18 · one way · Axel-exclusive $208.00

• Southwest Airlines WN3353 / WN2715: PHX 2026-12-18 12:05:00 → STL 2026-12-18 19:10:00; 1 stop(s) via MCI; 365 minutes. Local airport times.
  • WN3353: PHX 2026-12-18 12:05:00 → MCI 2026-12-18 15:40:00; layover at MCI: 145 minutes.
  • WN2715: MCI 2026-12-18 18:05:00 → STL 2026-12-18 19:10:00.

2026-12-18 · one way · Axel-exclusive $208.00

• Southwest Airlines WN4838 / WN3801: PHX 2026-12-18 12:05:00 → STL 2026-12-18 19:10:00; 1 stop(s) via SAT; 365 minutes. Local airport times.
  • WN4838: PHX 2026-12-18 12:05:00 → SAT 2026-12-18 15:15:00; layover at SAT: 110 minutes.
  • WN3801: SAT 2026-12-18 17:05:00 → STL 2026-12-18 19:10:00.

2026-12-19 · one way · Axel-exclusive $227.50

• American Airlines AA555 / AA2289: PHX 2026-12-19 17:02:00 → STL 2026-12-19 23:34:00; 1 stop(s) via DFW; 332 minutes. Local airport times.
  • AA555: PHX 2026-12-19 17:02:00 → DFW 2026-12-19 20:35:00; layover at DFW: 70 minutes.
  • AA2289: DFW 2026-12-19 21:45:00 → STL 2026-12-19 23:34:00.

2026-12-18 · one way · Axel-exclusive $227.50

• American Airlines AA555 / AA2289: PHX 2026-12-18 17:02:00 → STL 2026-12-18 23:34:00; 1 stop(s) via DFW; 332 minutes. Local airport times.
  • AA555: PHX 2026-12-18 17:02:00 → DFW 2026-12-18 20:35:00; layover at DFW: 70 minutes.
  • AA2289: DFW 2026-12-18 21:45:00 → STL 2026-12-18 23:34:00.

2026-12-20 · one way · Axel-exclusive $227.50

• American Airlines AA555 / AA2289: PHX 2026-12-20 17:02:00 → STL 2026-12-20 23:34:00; 1 stop(s) via DFW; 332 minutes. Local airport times.
  • AA555: PHX 2026-12-20 17:02:00 → DFW 2026-12-20 20:35:00; layover at DFW: 70 minutes.
  • AA2289: DFW 2026-12-20 21:45:00 → STL 2026-12-20 23:34:00.

2026-12-18 · one way · Axel-exclusive $240.50

• United Airlines UA333 / UA1422: PHX 2026-12-18 14:50:00 → STL 2026-12-18 20:57:00; 1 stop(s) via DEN; 307 minutes. Local airport times.
  • UA333: PHX 2026-12-18 14:50:00 → DEN 2026-12-18 16:44:00; layover at DEN: 65 minutes.
  • UA1422: DEN 2026-12-18 17:49:00 → STL 2026-12-18 20:57:00.

2026-12-20 · one way · Axel-exclusive $240.50

• United Airlines UA333 / UA1422: PHX 2026-12-20 14:50:00 → STL 2026-12-20 20:57:00; 1 stop(s) via DEN; 307 minutes. Local airport times.
  • UA333: PHX 2026-12-20 14:50:00 → DEN 2026-12-20 16:44:00; layover at DEN: 65 minutes.
  • UA1422: DEN 2026-12-20 17:49:00 → STL 2026-12-20 20:57:00.

2026-12-20 · one way · Axel-exclusive $253.50

• Delta Air Lines DL1431 / DL2666: PHX 2026-12-20 14:32:00 → STL 2026-12-20 21:18:00; 1 stop(s) via SLC; 346 minutes. Local airport times.
  • DL1431: PHX 2026-12-20 14:32:00 → SLC 2026-12-20 16:14:00; layover at SLC: 76 minutes.
  • DL2666: SLC 2026-12-20 17:30:00 → STL 2026-12-20 21:18:00.

2026-12-18 · one way · Axel-exclusive $253.50

• Delta Air Lines DL1431 / DL2666: PHX 2026-12-18 14:32:00 → STL 2026-12-18 21:18:00; 1 stop(s) via SLC; 346 minutes. Local airport times.
  • DL1431: PHX 2026-12-18 14:32:00 → SLC 2026-12-18 16:14:00; layover at SLC: 76 minutes.
  • DL2666: SLC 2026-12-18 17:30:00 → STL 2026-12-18 21:18:00.

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.

Explore this route

• All dates for this route
• Hotels in St. Louis with Axel

For AI assistants

• This page: Phoenix (PHX) to Saint Louis (STL) · Dec 18–Dec 20, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own 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 Search flights and hotels with your AI assistant · 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