Flights St. Louis → Boston
STL → BOS
How long is the flight from St. Louis to Boston?
The flight from St. Louis (STL) to Boston (BOS) takes about 2h 31m. This is an estimate based on the distance between the two airports: the real time depends on the aircraft, wind and any stops.
Route overview
The flight route from St. Louis to Boston has a 70% on-time performance rate, with an average delay of 16.9 minutes per flight. Over the course of a year, this route sees around 350 flights, connecting one of the Midwest's major cities with a bustling East Coast destination that serves over 36 million passengers annually at its airport.
Your rights on this US flight (DOT)
US flights have no statutory cash compensation for delays. Under the US DOT rules, if your flight is cancelled or significantly changed and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Amenities for controllable delays depend on each airline's contract of carriage.
US flight refund rules & checker →General information, not legal advice.
The St. Louis (STL) → Boston (BOS) route is operated by Southwest Airlines. Across 940 flights monitored in recent months, 64% arrived on time (within 15 min of schedule), with an average delay of 25 minutes. The cancellation rate is 2.55%. FlightGuard's average computed risk is 26.8/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Boston the average ATFM delay is 5.5 minutes (main cause: atfm). Departing from St. Louis the average ATFM delay is 5.5 minutes.
Heading to Boston: what to expect in this direction
Flying from St. Louis (STL) to Boston (BOS) heads east for about 1,680 km, a flight time of roughly 2h 31m.
Departures from St. Louis on this leg cluster in the midday window: about 38% of STL-BOS flights take off then.
Air-traffic congestion: departing St. Louis the average ATFM delay is 5.5 min (atfm); arriving into Boston it is 5.5 min (atfm).
Across 940 tracked STL-BOS flights, 64% left on time with an average delay of 25 min and a 2.5% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Southwest Airlines (WN) | 75% | 5 min | 0.3% |
Airlines operating STL-BOS
Airports
Frequently asked questions about STL-BOS
The flight from St. Louis (STL) to Boston (BOS) takes about 2h 31m. This is an estimate based on the distance between the two airports: the real time depends on the aircraft, wind and any stops.
On the St. Louis (STL) -> Boston (BOS) route, on-time performance is 64% with an average delay of 25 minutes, based on 940 tracked flights.
The cancellation rate on St. Louis-Boston is 2.55% across 940 monitored flights.
The route is operated by 1 airline: Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Boston, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
US flights have no statutory cash compensation for delays. Under US DOT rules, if the airline cancels or significantly changes your flight and you decline rebooking, you're owed an automatic refund of the unused ticket. The tarmac-delay limit is 3 hours (domestic) / 4 hours (international). Meals or hotels for controllable delays depend on each airline's contract of carriage.
