Pittsburgh (PIT) to St Louis (STL)
Flight time
≈ 1h 54m
Bearing
261° W
Pittsburgh (PIT) to St Louis (STL) is 552 miles (889 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies PIT–STL
Filed traffic dataIn May 2026, Southwest Airlines operated the most departures, one of 3 carriers flying nonstop PIT–STL; the Boeing 737-700 was the most common aircraft at 60% of departures; flights ran 63% full.
Departures
114
May 2026
Seats
17,275
both directions
Passengers
10,870
both directions
Load factor
62.9%
RPM ÷ ASM
Who flies PIT–STL?
Southwest Airlines operated the most nonstop PIT–STL departures in May 2026 (111), one of 3 carriers on the route.
- WN
111 departures · 16,841 seats
Share of departures97.4%63.5%
Load
- UA
2 departures · 358 seats
Share of departures1.8%37.4%
Load
- YX
1 departures · 76 seats
Share of departures0.9%51.3%
Load
What plane flies PIT–STL?
In May 2026, the Boeing 737-700 flew 60% of PIT–STL departures — more than any other aircraft type.
- Boeing 737-700
68 departures · 63.1% load
59.7% - Boeing 737 MAX 8
26 departures · 63.0% load
22.8% - Boeing 737-800
17 departures · 65.5% load
14.9% - Embraer E175
1 departures · 51.3% load
0.9% - Boeing 737 MAX 9
1 departures · 40.2% load
0.9% - Boeing 737-900ER
1 departures · 34.6% load
0.9%
How has PIT–STL traffic changed?
Nonstop PIT–STL departures rose from 72 in June 2025 to 114 in May 2026.
Monthly nonstop PIT–STL traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
72 departures · 8,021 passengers
73.0%
Load
July 2025
72 departures · 8,406 passengers
75.4%
Load
August 2025
71 departures · 7,062 passengers
60.6%
Load
September 2025
70 departures · 6,403 passengers
55.8%
Load
October 2025
71 departures · 8,013 passengers
72.4%
Load
November 2025
63 departures · 6,994 passengers
71.8%
Load
December 2025
63 departures · 6,057 passengers
65.3%
Load
January 2026
56 departures · 4,484 passengers
48.8%
Load
February 2026
55 departures · 4,341 passengers
52.6%
Load
March 2026
114 departures · 10,273 passengers
60.2%
Load
April 2026
114 departures · 10,875 passengers
63.4%
Load
May 2026
114 departures · 10,870 passengers
62.9%
Load
By direction
Each direction is filed separately — they rarely match.
PIT → STL
57.3% full
58 departures · 5,141 passengers
STL → PIT
69.1% full
56 departures · 5,729 passengers
Nonstop PIT–STL traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Pittsburgh (PIT) from St Louis (STL)?
PIT to STL is 552 miles (889 km / 480 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from PIT to STL?
A nonstop covers the 552-mile great-circle distance in roughly 1h 54m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies PIT–STL?
In May 2026, the Boeing 737-700 flew the largest share of departures (59.7%), followed by the Boeing 737 MAX 8 (22.8%).
What mileage do I earn flying PIT–STL?
Distance-based programs credit off the 552-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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