Flights Boston → St. Louis
BOS → STL
Route overview
The flight route from Boston to St. Louis has a relatively high on-time performance rate of 79%, with an average delay of 9.3 minutes per flight. Over the course of a year, this route sees 349 flights, serving one of the destination's airports which handles approximately 13,665,517 passengers annually.
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 Boston (BOS) → St. Louis (STL) route is operated by Southwest Airlines. Across 469 flights monitored in recent months, 79% arrived on time (within 15 min of schedule), with an average delay of 10 minutes. The cancellation rate is 3.20%. FlightGuard's average computed risk is 25.9/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At St. Louis the average ATFM delay is 2.0 minutes (main cause: atfm). Departing from Boston the average ATFM delay is 2.0 minutes.
Heading to St. Louis: what to expect in this direction
Flying from Boston (BOS) to St. Louis (STL) heads west for about 1,680 km, a flight time of roughly 2h 31m.
Departures from Boston on this leg cluster in the overnight window: about 50% of BOS-STL flights take off then.
Air-traffic congestion: departing Boston the average ATFM delay is 2.0 min (atfm); arriving into St. Louis it is 2.0 min (atfm).
Across 469 tracked BOS-STL flights, 79% left on time with an average delay of 10 min and a 3.2% 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) | 73% | 6 min | 3.1% |
Airlines operating BOS-STL
Airports
Frequently asked questions about BOS-STL
On the Boston (BOS) -> St. Louis (STL) route, on-time performance is 79% with an average delay of 10 minutes, based on 469 tracked flights.
The cancellation rate on Boston-St. Louis is 3.20% across 469 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 St. Louis, 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.
