Flights Boston → Denver
BOS → DEN
How long is the flight from Boston to Denver?
The flight from Boston (BOS) to Denver (DEN) takes 3h 52m on average. That is the median time recorded across 6 scheduled flights on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
Route overview
The flight route from Boston to Denver operates with an average on-time performance rate of 82%, with flights typically experiencing a mean delay of 8.5 minutes. Over the past year, approximately 850 flights have been conducted along this route using aircraft such as Airbus A320 and Boeing 737-900/800 models, serving Denver International Airport, which opened in 1989 and currently handles about 82,358,744 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) → Denver (DEN) route is operated by JetBlue Airways, United Airlines, Southwest Airlines. Across 2314 flights monitored in recent months, 79% arrived on time (within 15 min of schedule), with an average delay of 13 minutes. The cancellation rate is 2.72%. FlightGuard's average computed risk is 26.1/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Denver the average ATFM delay is 5.5 minutes (main cause: atfm). Departing from Boston the average ATFM delay is 5.5 minutes.
Heading to Denver: what to expect in this direction
Flying from Boston (BOS) to Denver (DEN) heads west for about 2,816 km, a flight time of roughly 3h 52m.
Departures from Boston on this leg cluster in the overnight window: about 39% of BOS-DEN flights take off then.
Air-traffic congestion: departing Boston the average ATFM delay is 5.5 min (atfm); arriving into Denver it is 5.5 min (atfm).
Across 2,314 tracked BOS-DEN flights, 79% left on time with an average delay of 13 min and a 2.7% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| United Airlines (UA) | 83% | 5 min | 1.3% |
| JetBlue Airways (B6) | 79% | 7 min | 0.1% |
| Southwest Airlines (WN) | 75% | 5 min | 0.3% |
Airlines operating BOS-DEN
Airports
Frequently asked questions about BOS-DEN
The flight from Boston (BOS) to Denver (DEN) takes 3h 52m on average. That is the median time recorded across 6 scheduled flights on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
On the Boston (BOS) -> Denver (DEN) route, on-time performance is 79% with an average delay of 13 minutes, based on 2314 tracked flights.
The cancellation rate on Boston-Denver is 2.72% across 2314 monitored flights.
The route is operated by 3 airlines: JetBlue Airways, United Airlines, Southwest Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Denver, 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.
