BOS → STLBoston to St Louis

live

Direct flights from Boston (BOS) to St Louis (STL): 14 nonstop departures observed each week across 2 airlines. 67% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is 5 minutes early. No cancellations were recorded across the 6 tracked flights. The nonstop covers 1,681 km, an estimated 2 hours 39 minutes in the air. Measured by Pro Flight Search from live flight boards at Boston and St Louis. Updated 8 September 2026 at 21:21 UTC.

BOS Boston smooth · +7
STL St Louis smooth · +0
1,681 km · ~2h 39m est.
dep bank 05:00–17:5014x weekly
Runs mixed · 2 airlines · 14x weekly · nonstop
67% on time

of the last 6 operated BOS → STL flights arrived within 15 minutes

Median arrival delay is −5 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−5 minacross the last 6 operated legs
Flight time~2h 39mestimated from route distance
Weekly departures14x2 direct airlines on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
American AirlinesSouthwest Airlines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
American AirlinesAA

Flights AA3546 07:09 Mo Tu We Th Fr · AA4417 07:09 Su · AA4678 17:22 daily

Southwest AirlinesWN

Flights WN4968 05:00 Mo Th Fr · WN3013 05:35 Tu We · WN960 10:45 Sa · WN2550 13:05 Tu We Su

History

operated legs · board outcomes
09-08AA3546departed−9
09-08MQ3546arrived+16
09-08WN2550dep +0 → arr−15
09-08WN3013arrived−25
09-07AA3546departed−5
09-07WN2076departed+72

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
BOSBoston +7 min smooth Full BOS delay board →
STLSt Louis +0 min smooth Full STL delay board →

Weather lens

Current conditions put the pressure at BOS and STL: 45% odds of a 15+ minute delay, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →

How the Boston to St Louis route actually runs

Pro Flight Search records official board updates for nonstop BOS to STL 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 — Boston (BOS) to St Louis (STL) route reliability, measured from operated flights on official airport boards.

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

BOS to STL questions

Is BOS–STL running on time right now?

Smooth skies ahead. The departure side at BOS is the weaker end, route health score 94/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on BOS–STL?

Operators schedule morning departures around 05:00 and evening departures around 17:22 from BOS. Earlier flights typically land before destination-airport delays accumulate later in the day; check the STL delay card to confirm conditions when you'd arrive.

How long is the flight from BOS to STL?

Great-circle distance is 1,681 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 149–174 min gate-to-gate on this route.

How often does BOS–STL fly?

2 carriers operate this route, around 34 flights a week between them. Compare carrier days and times in the airline list above.