Travel with Axel,
get the best price.

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

Pittsburgh → Saint Louis

Aug 20, 2027 · return Aug 23, 2027

PIT → STL1 adulteconomyRound trip

8 flight options · 4 airlines

Nonstop flights

Fri, Aug 20 – Mon, Aug 23

Southwest Airlines
6:50 amPIT
1h 50m
Nonstop
7:40 amSTL
Southwest Airlines
10:15 amSTL
1h 30m
Nonstop
12:45 pmPIT

Round-trip total · 1 adult · Taxes included

Fri, Aug 20 – Mon, Aug 23

Southwest Airlines
6:30 pmPIT
1h 55m
Nonstop
7:25 pmSTL
Southwest Airlines
10:15 amSTL
1h 30m
Nonstop
12:45 pmPIT

Round-trip total · 1 adult · Taxes included

One-stop flights

Fri, Aug 20 – Mon, Aug 23

Delta Air Lines
6:10 amPIT
4h 55m
DTW · 1h 49m
10:05 amSTL
Southwest Airlines
10:15 amSTL
1h 30m
Nonstop
12:45 pmPIT

Round-trip total · 1 adult · Taxes included

Fri, Aug 20 – Mon, Aug 23

American Airlines
7:15 pmPIT
5h 43m
CLT · 2h 6m
11:58 pmSTL
American Airlines
11:09 amSTL
4h 51m
CLT · 1h 34m
5:00 pmPIT

Round-trip total · 1 adult · Taxes included

Fri, Aug 20 – Mon, Aug 23

United Airlines
3:15 pmPIT
5h 20m
IAD · 1h 40m
7:35 pmSTL
United Airlines
6:55 pmSTL
4h 4m
ORD · 1h 3m
11:59 pmPIT

Round-trip total · 1 adult · Taxes included

Fri, Aug 20 – Mon, Aug 23

Southwest Airlines
8:25 amPIT
5h 15m
MDW · 2h 30m
12:40 pmSTL
Southwest Airlines
10:15 amSTL
1h 30m
Nonstop
12:45 pmPIT

Round-trip total · 1 adult · Taxes included

Fri, Aug 20 – Mon, Aug 23

American Airlines
4:03 pmPIT
4h 19m
ORD · 1h 9m
7:22 pmSTL
American Airlines
11:09 amSTL
4h 51m
CLT · 1h 34m
5:00 pmPIT

Round-trip total · 1 adult · Taxes included

Fri, Aug 20 – Mon, Aug 23

United Airlines
7:25 pmPIT
4h 34m
ORD · 1h 25m
10:59 pmSTL
United Airlines
6:55 pmSTL
4h 4m
ORD · 1h 3m
11:59 pmPIT

Round-trip total · 1 adult · Taxes included

Make this trip yours

PIT ⇄ STL

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Southwest Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeAug 19, 2027 → Aug 22, 2027Aug 21, 2027 → Aug 24, 2027
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

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

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2027-08-20 → 2027-08-23Southwest AirlinesWN3561 / WN4930$325.002026-10-29T01:57:14Z
2027-08-20 → 2027-08-23Delta Air Lines / Southwest AirlinesDL3857 + DL5395 / WN4930$352.502026-10-29T01:57:14Z
2027-08-20 → 2027-08-23American AirlinesAA3241 + AA2562 / AA2486 + AA1335$355.002026-10-29T01:57:14Z
2027-08-20 → 2027-08-23United AirlinesUA1317 + UA4527 / UA4397 + UA3464$365.002026-10-29T01:57:14Z
2027-08-20 → 2027-08-23Southwest AirlinesWN1111 / WN4930$325.002026-10-29T01:57:14Z
2027-08-20 → 2027-08-23Southwest AirlinesWN2313 + WN2737 / WN4930$335.002026-10-29T01:57:14Z
2027-08-20 → 2027-08-23American AirlinesAA3239 + AA772 / AA2486 + AA1335$355.002026-10-29T01:57:14Z
2027-08-20 → 2027-08-23United AirlinesUA3591 + UA1114 / UA4397 + UA3464$365.002026-10-29T01:57:14Z

2027-08-20 → 2027-08-23 · $325.00

  • Southwest Airlines WN3561: PIT 2027-08-20 06:50:00 → STL 2027-08-20 07:40:00; nonstop; 110 minutes. Local airport times.
  • Southwest Airlines WN4930: STL 2027-08-23 10:15:00 → PIT 2027-08-23 12:45:00; nonstop; 90 minutes. Local airport times.

2027-08-20 → 2027-08-23 · $352.50

  • Delta Air Lines DL3857 / DL5395: PIT 2027-08-20 06:10:00 → STL 2027-08-20 10:05:00; 1 stop(s) via DTW; 295 minutes. Local airport times.
    • DL3857: PIT 2027-08-20 06:10:00 → DTW 2027-08-20 07:26:00; layover at DTW: 109 minutes.
    • DL5395: DTW 2027-08-20 09:15:00 → STL 2027-08-20 10:05:00.
  • Southwest Airlines WN4930: STL 2027-08-23 10:15:00 → PIT 2027-08-23 12:45:00; nonstop; 90 minutes. Local airport times.

2027-08-20 → 2027-08-23 · $355.00

  • American Airlines AA3241 / AA2562: PIT 2027-08-20 19:15:00 → STL 2027-08-20 23:58:00; 1 stop(s) via CLT; 343 minutes. Local airport times.
    • AA3241: PIT 2027-08-20 19:15:00 → CLT 2027-08-20 20:45:00; layover at CLT: 126 minutes.
    • AA2562: CLT 2027-08-20 22:51:00 → STL 2027-08-20 23:58:00.
  • American Airlines AA2486 / AA1335: STL 2027-08-23 11:09:00 → PIT 2027-08-23 17:00:00; 1 stop(s) via CLT; 291 minutes. Local airport times.
    • AA2486: STL 2027-08-23 11:09:00 → CLT 2027-08-23 14:00:00; layover at CLT: 94 minutes.
    • AA1335: CLT 2027-08-23 15:34:00 → PIT 2027-08-23 17:00:00.

2027-08-20 → 2027-08-23 · $365.00

  • United Airlines UA1317 / UA4527: PIT 2027-08-20 15:15:00 → STL 2027-08-20 19:35:00; 1 stop(s) via IAD; 320 minutes. Local airport times.
    • UA1317: PIT 2027-08-20 15:15:00 → IAD 2027-08-20 16:20:00; layover at IAD: 100 minutes.
    • UA4527: IAD 2027-08-20 18:00:00 → STL 2027-08-20 19:35:00.
  • United Airlines UA4397 / UA3464: STL 2027-08-23 18:55:00 → PIT 2027-08-23 23:59:00; 1 stop(s) via ORD; 244 minutes. Local airport times.
    • UA4397: STL 2027-08-23 18:55:00 → ORD 2027-08-23 20:25:00; layover at ORD: 63 minutes.
    • UA3464: ORD 2027-08-23 21:28:00 → PIT 2027-08-23 23:59:00.

2027-08-20 → 2027-08-23 · $325.00

  • Southwest Airlines WN1111: PIT 2027-08-20 18:30:00 → STL 2027-08-20 19:25:00; nonstop; 115 minutes. Local airport times.
  • Southwest Airlines WN4930: STL 2027-08-23 10:15:00 → PIT 2027-08-23 12:45:00; nonstop; 90 minutes. Local airport times.

2027-08-20 → 2027-08-23 · $335.00

  • Southwest Airlines WN2313 / WN2737: PIT 2027-08-20 08:25:00 → STL 2027-08-20 12:40:00; 1 stop(s) via MDW; 315 minutes. Local airport times.
    • WN2313: PIT 2027-08-20 08:25:00 → MDW 2027-08-20 09:00:00; layover at MDW: 150 minutes.
    • WN2737: MDW 2027-08-20 11:30:00 → STL 2027-08-20 12:40:00.
  • Southwest Airlines WN4930: STL 2027-08-23 10:15:00 → PIT 2027-08-23 12:45:00; nonstop; 90 minutes. Local airport times.

2027-08-20 → 2027-08-23 · $355.00

  • American Airlines AA3239 / AA772: PIT 2027-08-20 16:03:00 → STL 2027-08-20 19:22:00; 1 stop(s) via ORD; 259 minutes. Local airport times.
    • AA3239: PIT 2027-08-20 16:03:00 → ORD 2027-08-20 16:54:00; layover at ORD: 69 minutes.
    • AA772: ORD 2027-08-20 18:03:00 → STL 2027-08-20 19:22:00.
  • American Airlines AA2486 / AA1335: STL 2027-08-23 11:09:00 → PIT 2027-08-23 17:00:00; 1 stop(s) via CLT; 291 minutes. Local airport times.
    • AA2486: STL 2027-08-23 11:09:00 → CLT 2027-08-23 14:00:00; layover at CLT: 94 minutes.
    • AA1335: CLT 2027-08-23 15:34:00 → PIT 2027-08-23 17:00:00.

2027-08-20 → 2027-08-23 · $365.00

  • United Airlines UA3591 / UA1114: PIT 2027-08-20 19:25:00 → STL 2027-08-20 22:59:00; 1 stop(s) via ORD; 274 minutes. Local airport times.
    • UA3591: PIT 2027-08-20 19:25:00 → ORD 2027-08-20 20:20:00; layover at ORD: 85 minutes.
    • UA1114: ORD 2027-08-20 21:45:00 → STL 2027-08-20 22:59:00.
  • United Airlines UA4397 / UA3464: STL 2027-08-23 18:55:00 → PIT 2027-08-23 23:59:00; 1 stop(s) via ORD; 244 minutes. Local airport times.
    • UA4397: STL 2027-08-23 18:55:00 → ORD 2027-08-23 20:25:00; layover at ORD: 63 minutes.
    • UA3464: ORD 2027-08-23 21:28:00 → PIT 2027-08-23 23:59:00.

Explore this route