Flights London → Boston
LHR → BOS
How long is the flight from London to Boston?
The flight from London (LHR) to Boston (BOS) takes 7h 22m on average. That is the median time recorded across 1 scheduled flight on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
Route overview
The flight route from London to Boston is operated using a variety of aircraft including the Boeing 747-400, Boeing 777, Boeing 767-400, Boeing 767, and Airbus A330-300. The destination airport in Boston sees over thirty-six million passengers annually, highlighting its significance as a major transportation hub.
The London (LHR) → Boston (BOS) route is operated by American Airlines, Air France, British Airways, Delta Air Lines, Iberia Airlines, KLM Royal Dutch Airlines. Across 14 flights monitored in recent months, 100% arrived on time (within 15 min of schedule), with an average delay of -10 minutes. The cancellation rate is 21.43%. FlightGuard's average computed risk is 9.7/100 (low), 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 London the average ATFM delay is 1.8 minutes.
Heading to Boston: what to expect in this direction
Flying from London (LHR) to Boston (BOS) heads west for about 5,240 km, a flight time of roughly 7h 22m.
Departures from London on this leg cluster in the morning window: about 100% of LHR-BOS flights take off then.
Air-traffic congestion: departing London the average ATFM delay is 1.8 min (atfm); arriving into Boston it is 5.5 min (atfm).
Across 14 tracked LHR-BOS flights, 100% left on time with an average delay of -10 min and a 21.4% cancellation rate.
Route facts
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Airline punctuality on this route
| Airline | On-time | Average delay | Cancellations |
|---|---|---|---|
| Iberia Airlines (IB) | 87% | 20 min | 1.2% |
| Delta Air Lines (DL) | 85% | 1 min | 0.8% |
| Air France (AF) | 82% | 28 min | 0.0% |
| KLM Royal Dutch Airlines (KL) | 82% | 19 min | 5.9% |
| American Airlines (AA) | 79% | 6 min | 1.1% |
| British Airways (BA) | 66% | 31 min | 1.3% |
Airlines operating LHR-BOS
Airports
Frequently asked questions about LHR-BOS
The flight from London (LHR) to Boston (BOS) takes 7h 22m on average. That is the median time recorded across 1 scheduled flight on this leg; the actual time varies by a few minutes with wind, routing and take-off queues.
On the London (LHR) -> Boston (BOS) route, on-time performance is 100% with an average delay of -10 minutes, based on 14 tracked flights.
The cancellation rate on London-Boston is 21.43% across 14 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 Boston, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
The London-Boston route is about 5,240 km: for a cancellation (with less than 14 days' notice), a delay over 3 hours, or denied boarding, UK261 compensation is £520, barring extraordinary circumstances.
