Philadelphia (PHL) to Saint Louis (STL) · Jan 1, 2027 · return Jan 15, 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: Philadelphia to Saint Louis (STL) flight deals

2027-01-01 → 2027-01-15 · Axel-exclusive $327.00

• Southwest Airlines WN3375: PHL 2027-01-01 06:00:00 → STL 2027-01-01 07:40:00; nonstop; 160 minutes. Local airport times.
• Southwest Airlines WN4923: STL 2027-01-15 18:20:00 → PHL 2027-01-15 21:30:00; nonstop; 130 minutes. Local airport times.

2027-01-01 → 2027-01-15 · Axel-exclusive $370.60

• American Airlines AA5536: PHL 2027-01-01 20:55:00 → STL 2027-01-01 22:42:00; nonstop; 167 minutes. Local airport times.
• American Airlines AA5105: STL 2027-01-15 12:19:00 → PHL 2027-01-15 15:32:00; nonstop; 133 minutes. Local airport times.

2027-01-01 → 2027-01-15 · Axel-exclusive $196.20

• Frontier Airlines F91147 / F94473: PHL 2027-01-01 12:49:00 → STL 2027-01-01 17:42:00; 1 stop(s) via ATL; 353 minutes. Local airport times.
  • F91147: PHL 2027-01-01 12:49:00 → ATL 2027-01-01 15:19:00; layover at ATL: 90 minutes.
  • F94473: ATL 2027-01-01 16:49:00 → STL 2027-01-01 17:42:00.
• Frontier Airlines F94474 / F92298: STL 2027-01-15 12:02:00 → PHL 2027-01-15 18:32:00; 1 stop(s) via ATL; 330 minutes. Local airport times.
  • F94474: STL 2027-01-15 12:02:00 → ATL 2027-01-15 14:42:00; layover at ATL: 102 minutes.
  • F92298: ATL 2027-01-15 16:24:00 → PHL 2027-01-15 18:32:00.

2027-01-01 → 2027-01-15 · Axel-exclusive $337.90

• United Airlines UA4575 / UA4527: PHL 2027-01-01 15:05:00 → STL 2027-01-01 19:35:00; 1 stop(s) via IAD; 330 minutes. Local airport times.
  • UA4575: PHL 2027-01-01 15:05:00 → IAD 2027-01-01 16:18:00; layover at IAD: 102 minutes.
  • UA4527: IAD 2027-01-01 18:00:00 → STL 2027-01-01 19:35:00.
• United Airlines UA3495 / UA4405: STL 2027-01-15 13:23:00 → PHL 2027-01-15 19:02:00; 1 stop(s) via IAD; 279 minutes. Local airport times.
  • UA3495: STL 2027-01-15 13:23:00 → IAD 2027-01-15 16:33:00; layover at IAD: 77 minutes.
  • UA4405: IAD 2027-01-15 17:50:00 → PHL 2027-01-15 19:02:00.

2027-01-01 → 2027-01-15 · Axel-exclusive $348.80

• Delta Air Lines DL2968 / DL1371: PHL 2027-01-01 09:43:00 → STL 2027-01-01 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
  • DL2968: PHL 2027-01-01 09:43:00 → DTW 2027-01-01 11:35:00; layover at DTW: 68 minutes.
  • DL1371: DTW 2027-01-01 12:43:00 → STL 2027-01-01 13:30:00.
• Delta Air Lines DL2868 / DL1391: STL 2027-01-15 10:14:00 → PHL 2027-01-15 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
  • DL2868: STL 2027-01-15 10:14:00 → DTW 2027-01-15 12:46:00; layover at DTW: 133 minutes.
  • DL1391: DTW 2027-01-15 14:59:00 → PHL 2027-01-15 16:35:00.

2027-01-01 → 2027-01-15 · Axel-exclusive $327.00

• Southwest Airlines WN1424: PHL 2027-01-01 14:45:00 → STL 2027-01-01 16:20:00; nonstop; 155 minutes. Local airport times.
• Southwest Airlines WN4923: STL 2027-01-15 18:20:00 → PHL 2027-01-15 21:30:00; nonstop; 130 minutes. Local airport times.

2027-01-01 → 2027-01-15 · Axel-exclusive $370.60

• American Airlines AA5105: PHL 2027-01-01 10:30:00 → STL 2027-01-01 12:18:00; nonstop; 168 minutes. Local airport times.
• American Airlines AA5105: STL 2027-01-15 12:19:00 → PHL 2027-01-15 15:32:00; nonstop; 133 minutes. Local airport times.

2027-01-01 → 2027-01-15 · Axel-exclusive $314.70

• Southwest Airlines WN3372 / WN2737: PHL 2027-01-01 07:30:00 → STL 2027-01-01 12:40:00; 1 stop(s) via MDW; 370 minutes. Local airport times.
  • WN3372: PHL 2027-01-01 07:30:00 → MDW 2027-01-01 08:50:00; layover at MDW: 160 minutes.
  • WN2737: MDW 2027-01-01 11:30:00 → STL 2027-01-01 12:40:00.
• Southwest Airlines WN4923: STL 2027-01-15 18:20:00 → PHL 2027-01-15 21:30:00; nonstop; 130 minutes. Local airport times.

2027-01-01 → 2027-01-15 · Axel-exclusive $346.00

• American Airlines AA567 / AA2937: PHL 2027-01-01 15:06:00 → STL 2027-01-01 19:30:00; 1 stop(s) via CLT; 324 minutes. Local airport times.
  • AA567: PHL 2027-01-01 15:06:00 → CLT 2027-01-01 17:04:00; layover at CLT: 83 minutes.
  • AA2937: CLT 2027-01-01 18:27:00 → STL 2027-01-01 19:30:00.
• American Airlines AA5105: STL 2027-01-15 12:19:00 → PHL 2027-01-15 15:32:00; nonstop; 133 minutes. Local airport times.

2027-01-01 → 2027-01-15 · Axel-exclusive $346.00

• American Airlines AA3308 / AA4341: PHL 2027-01-01 07:35:00 → STL 2027-01-01 12:42:00; 1 stop(s) via BOS; 367 minutes. Local airport times.
  • AA3308: PHL 2027-01-01 07:35:00 → BOS 2027-01-01 09:04:00; layover at BOS: 75 minutes.
  • AA4341: BOS 2027-01-01 10:19:00 → STL 2027-01-01 12:42:00.
• American Airlines AA5105: STL 2027-01-15 12:19:00 → PHL 2027-01-15 15:32:00; nonstop; 133 minutes. Local airport times.

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
• Dec 31, 2026 · Return options
• Jan 2, 2027 · Return options
• Hotels in St. Louis with Axel

For AI assistants

• This page: Philadelphia (PHL) to Saint Louis (STL) · Jan 1, 2027 · return Jan 15, 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 Philadelphia 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.

Feedback (optional): Missing info · Axel issue