Flights London → Washington
LHR → IAD
How long is the flight from London to Washington?
The flight from London (LHR) to Washington (IAD) takes 7h 53m 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
This flight route operates from London to Washington, with an average of 15 flights per year. The on-time performance is at 77%, and the mean delay duration is approximately 18.5 minutes. The aircraft used for this route include Boeing 747-400, Boeing 777, Airbus A330-300, and Boeing 757-200, serving a destination airport that handles over 21 million passengers annually.
The London (LHR) → Washington (IAD) route is operated by American Airlines, British Airways, Delta Air Lines, Iberia Airlines, Lufthansa Cargo, United Airlines. Across 29 flights monitored in recent months, 80% arrived on time (within 15 min of schedule), with an average delay of 12 minutes. The cancellation rate is 0.00%. FlightGuard's average computed risk is 10.4/100 (low), updated in real time from weather, ATC delays, strikes, NOTAMs, fuel and flight history. At Washington the average ATFM delay is 5.5 minutes (main cause: atfm). Departing from London the average ATFM delay is 1.8 minutes.
Heading to Washington: what to expect in this direction
Flying from London (LHR) to Washington (IAD) heads west for about 5,902 km, a flight time of roughly 7h 53m.
Departures from London on this leg cluster in the midday window: about 100% of LHR-IAD flights take off then.
Air-traffic congestion: departing London the average ATFM delay is 1.8 min (atfm); arriving into Washington it is 5.5 min (atfm).
Across 29 tracked LHR-IAD flights, 80% left on time with an average delay of 12 min and a 0.0% 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% |
| United Airlines (UA) | 83% | 5 min | 1.3% |
| American Airlines (AA) | 79% | 6 min | 1.1% |
| Lufthansa Cargo (LH) | 74% | 21 min | 0.0% |
| British Airways (BA) | 66% | 31 min | 1.3% |
Airlines operating LHR-IAD
Airports
Frequently asked questions about LHR-IAD
The flight from London (LHR) to Washington (IAD) takes 7h 53m 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) -> Washington (IAD) route, on-time performance is 80% with an average delay of 12 minutes, based on 29 tracked flights.
The cancellation rate on London-Washington is 0.00% across 29 monitored flights.
The route is operated by 6 airlines: American Airlines, British Airways, Delta Air Lines, Iberia Airlines, Lufthansa Cargo, United Airlines.
Enter your flight number on FlightGuard for a real-time analysis based on 9 factors: weather at Washington, ATC delays, strikes, NOTAMs, fuel, airline punctuality and recent trends.
The London-Washington route is about 5,902 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.
