Logan International (BOS) to Heathrow (LHR). Served by British Airways, Delta, JetBlue.
| Departure | Return | Price |
|---|---|---|
| 07/29/2026 | 08/06/2026 | $710 |
| 07/15/2026 | 07/23/2026 | $711 |
| 07/16/2026 | 07/23/2026 | $711 |
| 07/19/2026 | 07/28/2026 | $717 |
| 07/22/2026 | 07/28/2026 | $717 |
| 07/22/2026 | 07/29/2026 | $717 |
| 07/23/2026 | 07/29/2026 | $717 |
| 07/29/2026 | 08/05/2026 | $717 |
| 06/16/2026 | 06/22/2026 | $719 |
| 06/29/2026 | 07/08/2026 | $719 |
Based on current fares, August is the cheapest month to fly from Boston to London, with average fares around $797 round trip (as low as $775).
See the full month-by-month and day-of-week price analysis
Best Time to Fly BOS → LHRDeparture date prices (economy, round trip). Green = cheap, red = expensive.
The cheapest month to fly from Boston to London is August, with average round-trip fares around $797. Fares in August start as low as $775. The most expensive month is June, averaging $895.
A nonstop flight from Boston to London takes approximately 6h 30m.
British Airways, Delta, and JetBlue fly from BOS to LHR. That's 3 airlines serving this route.
The cheapest flight from Boston to London currently starts at $710 round trip in economy class.
The average round-trip flight price from Boston to London is $882 in economy class.
The distance is 3271 miles (5263 km). with a nonstop flight time of about 6h 30m. Airlines on this route include British Airways, Delta, JetBlue. The lowest fare currently available is $710 departing in July. The average round-trip fare is $882.
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