Saint Louis (STL) to Pittsburgh (PIT), Dec 18–20, 2026: from $140 one way

Saint Louis (STL) to Pittsburgh (PIT), Dec 18–20, 2026: from $140 one way on Axel, checked Oct 29, 2026. Lowest published fare: $140 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.

Route overview: Saint Louis to Pittsburgh (PIT) flight deals

2026-12-18 · one way · Axel-exclusive $150.00

• Southwest Airlines WN4850: STL 2026-12-18 18:15:00 → PIT 2026-12-18 20:55:00; nonstop; 100 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $165.00

• American Airlines AA2486 / AA1335: STL 2026-12-18 11:09:00 → PIT 2026-12-18 17:00:00; 1 stop(s) via CLT; 291 minutes. Local airport times.
  • AA2486: STL 2026-12-18 11:09:00 → CLT 2026-12-18 14:00:00; layover at CLT: 94 minutes.
  • AA1335: CLT 2026-12-18 15:34:00 → PIT 2026-12-18 17:00:00.

2026-12-18 · one way · Axel-exclusive $170.00

• United Airlines UA4397 / UA3464: STL 2026-12-18 18:55:00 → PIT 2026-12-18 23:59:00; 1 stop(s) via ORD; 244 minutes. Local airport times.
  • UA4397: STL 2026-12-18 18:55:00 → ORD 2026-12-18 20:25:00; layover at ORD: 63 minutes.
  • UA3464: ORD 2026-12-18 21:28:00 → PIT 2026-12-18 23:59:00.

2026-12-19 · one way · Axel-exclusive $195.00

• Southwest Airlines WN4930: STL 2026-12-19 09:50:00 → PIT 2026-12-19 12:25:00; nonstop; 95 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $195.00

• Southwest Airlines WN4930: STL 2026-12-20 10:15:00 → PIT 2026-12-20 12:45:00; nonstop; 90 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $150.00

• Southwest Airlines WN4930: STL 2026-12-18 10:15:00 → PIT 2026-12-18 12:45:00; nonstop; 90 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $195.00

• Southwest Airlines WN4850: STL 2026-12-19 20:10:00 → PIT 2026-12-19 22:50:00; nonstop; 100 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $195.00

• Southwest Airlines WN4850: STL 2026-12-20 20:50:00 → PIT 2026-12-20 23:25:00; nonstop; 95 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $140.00

• Southwest Airlines WN1769 / WN4870: STL 2026-12-18 11:55:00 → PIT 2026-12-18 18:30:00; 1 stop(s) via DAL; 335 minutes. Local airport times.
  • WN1769: STL 2026-12-18 11:55:00 → DAL 2026-12-18 13:40:00; layover at DAL: 80 minutes.
  • WN4870: DAL 2026-12-18 15:00:00 → PIT 2026-12-18 18:30:00.

2026-12-18 · one way · Axel-exclusive $140.00

• Southwest Airlines WN4173 / WN3002: STL 2026-12-18 05:30:00 → PIT 2026-12-18 10:00:00; 1 stop(s) via MDW; 210 minutes. Local airport times.
  • WN4173: STL 2026-12-18 05:30:00 → MDW 2026-12-18 06:35:00; layover at MDW: 65 minutes.
  • WN3002: MDW 2026-12-18 07:40:00 → PIT 2026-12-18 10:00:00.

2026-12-18 · one way · Axel-exclusive $165.00

• American Airlines AA6306 / AA4363: STL 2026-12-18 17:19:00 → PIT 2026-12-18 23:44:00; 1 stop(s) via ORD; 325 minutes. Local airport times.
  • AA6306: STL 2026-12-18 17:19:00 → ORD 2026-12-18 18:59:00; layover at ORD: 121 minutes.
  • AA4363: ORD 2026-12-18 21:00:00 → PIT 2026-12-18 23:44:00.

2026-12-18 · one way · Axel-exclusive $170.00

• United Airlines UA4406 / UA212: STL 2026-12-18 08:30:00 → PIT 2026-12-18 14:05:00; 1 stop(s) via IAD; 275 minutes. Local airport times.
  • UA4406: STL 2026-12-18 08:30:00 → IAD 2026-12-18 11:35:00; layover at IAD: 85 minutes.
  • UA212: IAD 2026-12-18 13:00:00 → PIT 2026-12-18 14:05:00.

2026-12-20 · one way · Axel-exclusive $182.00

• Southwest Airlines WN1769 / WN4870: STL 2026-12-20 11:55:00 → PIT 2026-12-20 18:30:00; 1 stop(s) via DAL; 335 minutes. Local airport times.
  • WN1769: STL 2026-12-20 11:55:00 → DAL 2026-12-20 13:40:00; layover at DAL: 80 minutes.
  • WN4870: DAL 2026-12-20 15:00:00 → PIT 2026-12-20 18:30:00.

2026-12-19 · one way · Axel-exclusive $182.00

• Southwest Airlines WN4173 / WN3002: STL 2026-12-19 05:30:00 → PIT 2026-12-19 10:00:00; 1 stop(s) via MDW; 210 minutes. Local airport times.
  • WN4173: STL 2026-12-19 05:30:00 → MDW 2026-12-19 06:35:00; layover at MDW: 65 minutes.
  • WN3002: MDW 2026-12-19 07:40:00 → PIT 2026-12-19 10:00:00.

2026-12-20 · one way · Axel-exclusive $182.00

• Southwest Airlines WN4173 / WN3002: STL 2026-12-20 05:30:00 → PIT 2026-12-20 10:00:00; 1 stop(s) via MDW; 210 minutes. Local airport times.
  • WN4173: STL 2026-12-20 05:30:00 → MDW 2026-12-20 06:35:00; layover at MDW: 65 minutes.
  • WN3002: MDW 2026-12-20 07:40:00 → PIT 2026-12-20 10:00:00.

2026-12-19 · one way · Axel-exclusive $182.00

• Southwest Airlines WN1769 / WN4870: STL 2026-12-19 11:55:00 → PIT 2026-12-19 18:30:00; 1 stop(s) via DAL; 335 minutes. Local airport times.
  • WN1769: STL 2026-12-19 11:55:00 → DAL 2026-12-19 13:40:00; layover at DAL: 80 minutes.
  • WN4870: DAL 2026-12-19 15:00:00 → PIT 2026-12-19 18:30:00.

2026-12-20 · one way · Axel-exclusive $214.50

• American Airlines AA2486 / AA1335: STL 2026-12-20 11:09:00 → PIT 2026-12-20 17:00:00; 1 stop(s) via CLT; 291 minutes. Local airport times.
  • AA2486: STL 2026-12-20 11:09:00 → CLT 2026-12-20 14:00:00; layover at CLT: 94 minutes.
  • AA1335: CLT 2026-12-20 15:34:00 → PIT 2026-12-20 17:00:00.

2026-12-20 · one way · Axel-exclusive $214.50

• American Airlines AA6306 / AA4363: STL 2026-12-20 17:19:00 → PIT 2026-12-20 23:44:00; 1 stop(s) via ORD; 325 minutes. Local airport times.
  • AA6306: STL 2026-12-20 17:19:00 → ORD 2026-12-20 18:59:00; layover at ORD: 121 minutes.
  • AA4363: ORD 2026-12-20 21:00:00 → PIT 2026-12-20 23:44:00.

2026-12-19 · one way · Axel-exclusive $214.50

• American Airlines AA2486 / AA1335: STL 2026-12-19 11:09:00 → PIT 2026-12-19 17:00:00; 1 stop(s) via CLT; 291 minutes. Local airport times.
  • AA2486: STL 2026-12-19 11:09:00 → CLT 2026-12-19 14:00:00; layover at CLT: 94 minutes.
  • AA1335: CLT 2026-12-19 15:34:00 → PIT 2026-12-19 17:00:00.

2026-12-19 · one way · Axel-exclusive $214.50

• American Airlines AA6306 / AA4363: STL 2026-12-19 17:19:00 → PIT 2026-12-19 23:44:00; 1 stop(s) via ORD; 325 minutes. Local airport times.
  • AA6306: STL 2026-12-19 17:19:00 → ORD 2026-12-19 18:59:00; layover at ORD: 121 minutes.
  • AA4363: ORD 2026-12-19 21:00:00 → PIT 2026-12-19 23:44:00.

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

• United Airlines UA4397 / UA3464: STL 2026-12-19 18:55:00 → PIT 2026-12-19 23:59:00; 1 stop(s) via ORD; 244 minutes. Local airport times.
  • UA4397: STL 2026-12-19 18:55:00 → ORD 2026-12-19 20:25:00; layover at ORD: 63 minutes.
  • UA3464: ORD 2026-12-19 21:28:00 → PIT 2026-12-19 23:59:00.

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

• United Airlines UA4406 / UA212: STL 2026-12-20 08:30:00 → PIT 2026-12-20 14:05:00; 1 stop(s) via IAD; 275 minutes. Local airport times.
  • UA4406: STL 2026-12-20 08:30:00 → IAD 2026-12-20 11:35:00; layover at IAD: 85 minutes.
  • UA212: IAD 2026-12-20 13:00:00 → PIT 2026-12-20 14:05:00.

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

• United Airlines UA4397 / UA3464: STL 2026-12-20 18:55:00 → PIT 2026-12-20 23:59:00; 1 stop(s) via ORD; 244 minutes. Local airport times.
  • UA4397: STL 2026-12-20 18:55:00 → ORD 2026-12-20 20:25:00; layover at ORD: 63 minutes.
  • UA3464: ORD 2026-12-20 21:28:00 → PIT 2026-12-20 23:59:00.

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

• United Airlines UA4406 / UA212: STL 2026-12-19 08:30:00 → PIT 2026-12-19 14:05:00; 1 stop(s) via IAD; 275 minutes. Local airport times.
  • UA4406: STL 2026-12-19 08:30:00 → IAD 2026-12-19 11:35:00; layover at IAD: 85 minutes.
  • UA212: IAD 2026-12-19 13:00:00 → PIT 2026-12-19 14:05:00.

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.

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