STL → PITSt Louis to Pittsburgh

live

Direct flights from St Louis (STL) to Pittsburgh (PIT): 7 nonstop departures observed each week across 1 airline. 83% of the last 12 operated flights arrived within 15 minutes of schedule. The median arrival is on schedule. No cancellations were recorded across the 12 tracked flights. The nonstop covers 889 km, an estimated 1 hour 38 minutes in the air. Measured by Pro Flight Search from live flight boards at St Louis and Pittsburgh. Updated 11 September 2026 at 10:18 UTC.

STL St Louis busy · +21
PIT Pittsburgh smooth · +0
889 km · ~1h 38m est.
dep bank 10:30–19:357x weekly
Runs reliable · 1 airline · 7x weekly · nonstop
83% on time

of the last 12 operated STL → PIT flights arrived within 15 minutes

Median arrival delay is +0 min. 0 of 12 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+0 minacross the last 12 operated legs
Flight time~1h 38mestimated from route distance
Weekly departures7x1 direct airline on the leg
Cancelled0.0%recent route rate · 0 of 12

Who flies it

observed on the boards · 7 days
Southwest AirlinesWN83% on time

Flights WN3879 varies daily · WN4165 varies Mo Tu We Th Fr Su

History

operated legs · board outcomes
09-10WN3879dep +14 → arr−15
09-10WN4165dep +0 → arr+70
09-09WN3879dep +1 → arr−24
09-09WN4165dep +3 → arr−20
09-08WN3879departed+9
09-08WN4165dep +1 → arr−24
09-07WN3879dep +12 → arr−11
09-07WN4165dep +174 → arr+142
09-06WN4165dep +25 → arr+6
09-05WN3879dep +12 → arr−8
09-04WN3879dep +22 → arr+0
09-04WN4165dep +39 → arr+7

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
STLSt Louis +21 min busy 🌤 mostly cloudy · E 3 kt Full STL delay board →
PITPittsburgh +0 min smooth 🌤 mostly cloudy · NNE 4 kt Full PIT delay board →

Weather lens

Current conditions put the pressure at STL and PIT: 43% odds of a 15+ minute delay and around +9 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the St Louis to Pittsburgh route actually runs

Pro Flight Search records official board updates for nonstop STL to PIT flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search — St Louis (STL) to Pittsburgh (PIT) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/STL-PIT
How we measure this →

STL to PIT questions

Is STL–PIT running on time right now?

Smooth skies ahead. The departure side at STL is the weaker end, route health score 86/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from STL to PIT?

Great-circle distance is 889 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 93–106 min gate-to-gate on this route.

How often does STL–PIT fly?

Southwest Airlines runs the route with about 13 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.

What does the route health score measure?

A blend of departure-side delay at STL and arrival-side delay at PIT, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.