Saint Louis (STL) to Philadelphia (PHL) · Jan 6, 2027 · 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 Philadelphia (PHL) flight deals

2027-01-06 · one way · Axel-exclusive $166.25

• Southwest Airlines WN4923: STL 2027-01-06 19:55:00 → PHL 2027-01-06 23:05:00; nonstop; 130 minutes. Local airport times.

2027-01-06 · one way · Axel-exclusive $175.75

• American Airlines AA5105: STL 2027-01-06 12:49:00 → PHL 2027-01-06 16:02:00; nonstop; 133 minutes. Local airport times.

2027-01-06 · one way · Axel-exclusive $99.75

• Frontier Airlines F94474 / F92298: STL 2027-01-06 12:02:00 → PHL 2027-01-06 18:32:00; 1 stop(s) via ATL; 330 minutes. Local airport times.
  • F94474: STL 2027-01-06 12:02:00 → ATL 2027-01-06 14:42:00; layover at ATL: 102 minutes.
  • F92298: ATL 2027-01-06 16:24:00 → PHL 2027-01-06 18:32:00.

2027-01-06 · one way · Axel-exclusive $161.50

• United Airlines UA3495 / UA4405: STL 2027-01-06 13:23:00 → PHL 2027-01-06 19:02:00; 1 stop(s) via IAD; 279 minutes. Local airport times.
  • UA3495: STL 2027-01-06 13:23:00 → IAD 2027-01-06 16:33:00; layover at IAD: 77 minutes.
  • UA4405: IAD 2027-01-06 17:50:00 → PHL 2027-01-06 19:02:00.

2027-01-06 · one way · Axel-exclusive $166.25

• Delta Air Lines DL2868 / DL1391: STL 2027-01-06 10:14:00 → PHL 2027-01-06 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
  • DL2868: STL 2027-01-06 10:14:00 → DTW 2027-01-06 12:46:00; layover at DTW: 133 minutes.
  • DL1391: DTW 2027-01-06 14:59:00 → PHL 2027-01-06 16:35:00.

2027-01-06 · one way · Axel-exclusive $232.75

• Air Canada AC8890 / AC8520: STL 2027-01-06 16:05:00 → PHL 2027-01-06 22:46:00; 1 stop(s) via YYZ; 341 minutes. Local airport times.
  • AC8890: STL 2027-01-06 16:05:00 → YYZ 2027-01-06 19:05:00; layover at YYZ: 125 minutes.
  • AC8520: YYZ 2027-01-06 21:10:00 → PHL 2027-01-06 22:46:00.

2027-01-06 · one way · Axel-exclusive $166.25

• Southwest Airlines WN3331: STL 2027-01-06 10:00:00 → PHL 2027-01-06 13:10:00; nonstop; 130 minutes. Local airport times.

2027-01-06 · one way · Axel-exclusive $175.75

• American Airlines AA5308: STL 2027-01-06 06:12:00 → PHL 2027-01-06 09:32:00; nonstop; 140 minutes. Local airport times.

2027-01-06 · one way · Axel-exclusive $142.50

• Southwest Airlines WN4173 / WN1082: STL 2027-01-06 05:30:00 → PHL 2027-01-06 10:45:00; 1 stop(s) via MDW; 255 minutes. Local airport times.
  • WN4173: STL 2027-01-06 05:30:00 → MDW 2027-01-06 06:35:00; layover at MDW: 70 minutes.
  • WN1082: MDW 2027-01-06 07:45:00 → PHL 2027-01-06 10:45:00.

2027-01-06 · one way · Axel-exclusive $166.25

• Delta Air Lines DL1571 / DL1169: STL 2027-01-06 10:06:00 → PHL 2027-01-06 16:44:00; 1 stop(s) via ATL; 338 minutes. Local airport times.
  • DL1571: STL 2027-01-06 10:06:00 → ATL 2027-01-06 12:36:00; layover at ATL: 130 minutes.
  • DL1169: ATL 2027-01-06 14:46:00 → PHL 2027-01-06 16:44:00.

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
• Jan 5, 2027 · Return options
• Jan 7, 2027 · Return options
• Hotels in Philadelphia with Axel

For AI assistants

• This page: Saint Louis (STL) to Philadelphia (PHL) · Jan 6, 2027 · one way: 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 Saint Louis to Philadelphia (PHL) 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