London to Boston flights
Flights from London Heathrow (LHR) to Boston (BOS) cover 5,240 km. 5,346 flights flew between them in the last 12 months of UK Civil Aviation Authority figures; 81% were on time across 5 airlines.
Both directions together. On time means within 15 minutes of schedule, counted over every scheduled flight to and from the UK airport, including cancelled ones (the CAA's definition).
Airlines on this route
| Airline | Flights | On time | Cancelled | Average delay |
|---|---|---|---|---|
| British Airways | 2,043 | 77% | 2.3% | 13 min |
| Virgin Atlantic Airways | 1,159 | 84% | 2% | 8 min |
| Delta Air Lines | 726 | 84% | 0.8% | 10 min |
| JetBlue Airways | 720 | 83% | 1.5% | 10 min |
| American Airlines | 698 | 84% | 3.2% | 14 min |
Month by month
Over the last 12 months, London and Boston ran best in March 2026 (89.2% on time) and worst in July 2026 (70.7%).
See the figures
| Month | On time | Cancelled | Flights |
|---|---|---|---|
| August 2025 | 81% | 1.2% | 491 |
| September 2025 | 83% | 0.8% | 476 |
| October 2025 | 84% | 1.5% | 454 |
| November 2025 | 85% | 0.5% | 426 |
| December 2025 | 79% | 0.2% | 445 |
| January 2026 | 80% | 4.7% | 408 |
| February 2026 | 77% | 7.6% | 355 |
| March 2026 | 89% | 1.1% | 435 |
| April 2026 | 87% | 1.1% | 445 |
| May 2026 | 80% | 1.1% | 456 |
| June 2026 | 79% | 3% | 471 |
| July 2026 | 71% | 3.1% | 484 |
Source: UK Civil Aviation Authority punctuality statistics, August 2025 to July 2026. Contains UK Civil Aviation Authority data. Figures describe the past and do not predict a future flight.
More about London Heathrow (LHR) and Boston (BOS).
Questions and answers
- How often are flights between London and Boston on time?
- 81.3% of 5,346 flights were on time (within 15 minutes) over the last 12 months of UK Civil Aviation Authority figures, and 2.1% were cancelled.
- Which airline is most punctual between London and Boston?
- American Airlines, with 84.1% on time. British Airways was the least punctual at 77.4%.
- What is the best month to fly between London and Boston?
- Over the last 12 months, London and Boston ran best in March 2026 (89.2% on time) and worst in July 2026 (70.7%).
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