Flights Boston → London
BOS → LHR
Route overview
The flight route from Boston to London operates with a mix of aircraft including Boeing 777, Boeing 747-400, Boeing 767 variants, and Airbus A330-300. With an average delay of 11.2 minutes per flight and only 71% of flights arriving on time, the route experiences moderate punctuality over its twenty-eight total flights annually to a destination airport that serves approximately 83,884,572 passengers yearly.
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) → London (LHR) route is operated by American Airlines, Air France, British Airways, Delta Air Lines, Iberia Airlines, KLM Royal Dutch Airlines. Across 28 flights monitored in recent months, 71% arrived on time (within 15 min of schedule), with an average delay of 11 minutes. The cancellation rate is 0.00%. FlightGuard's average computed risk is 15.1/100 (medium), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At London the average ATFM delay is 1.8 minutes (main cause: atfm). Departing from Boston the average ATFM delay is 2.0 minutes.
Heading to London: what to expect in this direction
Flying from Boston (BOS) to London (LHR) heads north-east for about 5,240 km, a flight time of roughly 6h 58m.
Departures from Boston on this leg cluster in the morning window: about 50% of BOS-LHR flights take off then.
Air-traffic congestion: departing Boston the average ATFM delay is 2.0 min (atfm); arriving into London it is 1.8 min (atfm).
Across 28 tracked BOS-LHR flights, 71% left on time with an average delay of 11 min and a 0.0% cancellation rate.
Route facts
Flights on this route
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Iberia Airlines (IB) | 86% | 17 min | 4.8% |
| KLM Royal Dutch Airlines (KL) | 84% | 20 min | 0.0% |
| Air France (AF) | 82% | 18 min | 3.3% |
| Delta Air Lines (DL) | 80% | 8 min | 1.8% |
| British Airways (BA) | 77% | 17 min | 2.4% |
| American Airlines (AA) | 74% | 16 min | 3.0% |
Airlines operating BOS-LHR
Airports
Frequently asked questions about BOS-LHR
On the Boston (BOS) -> London (LHR) route, on-time performance is 71% with an average delay of 11 minutes, based on 28 tracked flights.
The cancellation rate on Boston-London is 0.00% across 28 monitored flights.
The route is operated by 6 airlines: American Airlines, Air France, British Airways, Delta Air Lines, Iberia Airlines, KLM Royal Dutch Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at London, 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.
