Flight price alerts: Boston → London
Sample round trips on this route start around EUR 512; October 2026 is often the cheapest month in our next-3-month window. FlexTrip Alerts is a free email service — set flexible travel dates and a max price, and we notify you when a round trip fits. We check fares about four times per day; we do not sell tickets.
Set a free tracker with flexible dates and your max price. We email you only when a round trip fits.
Sample fares from EUR 512. Cheapest month in our next-3-month sample: October 2026.
Set an alert and we email you when a round trip drops under your limit.
Set a price alertRound trips on this route
Cheapest-seen sample fares (next 3 months) — confirm the final price on the booking site when you click through.
Last updated .
- See deal
- Round trip · 10 nights
- Thu 22 Oct · 17:25
- Return Sun 01 Nov · 08:40
EUR 512
- See deal
- Round trip · 7 nights
- Sat 24 Oct · 20:50
- Return Sat 31 Oct · 11:55
EUR 564
- See deal
- Round trip · 11 nights
- Thu 19 Nov · 16:05
- Return Mon 30 Nov · 06:10
EUR 593
- See deal
- Round trip · 16 nights
- Tue 06 Oct · 15:35
- Return Thu 22 Oct · 09:25
EUR 613
- See deal
- Round trip · 5 nights
- Thu 19 Nov · 17:35
- Return Tue 24 Nov · 06:40
EUR 677
- See deal
- Round trip · 9 nights
- Thu 19 Nov · 17:15
- Return Sat 28 Nov · 07:30
EUR 711
- See deal
- Round trip · 10 nights
- Thu 19 Nov · 10:25
- Return Sun 29 Nov · 13:00
EUR 761
| Depart | Return | Stay | Price | Book |
|---|---|---|---|---|
| Thu 22 Oct · 17:25 | Sun 01 Nov · 08:40 | 10 nights | EUR 512 | See deal |
| Sat 24 Oct · 20:50 | Sat 31 Oct · 11:55 | 7 nights | EUR 564 | See deal |
| Thu 19 Nov · 16:05 | Mon 30 Nov · 06:10 | 11 nights | EUR 593 | See deal |
| Tue 06 Oct · 15:35 | Thu 22 Oct · 09:25 | 16 nights | EUR 613 | See deal |
| Thu 19 Nov · 17:35 | Tue 24 Nov · 06:40 | 5 nights | EUR 677 | See deal |
| Thu 19 Nov · 17:15 | Sat 28 Nov · 07:30 | 9 nights | EUR 711 | See deal |
| Thu 19 Nov · 10:25 | Sun 29 Nov · 13:00 | 10 nights | EUR 761 | See deal |
Frequently asked questions
- How do I get email alerts when Boston to London flights drop in price?
- Create a free FlexTrip Alerts tracker for Boston Logan International Airport (BOS) to London (All Airports) (LON). Choose your flexible departure window, stay length, and maximum price — we email you when a round trip fits.
- Does FlexTrip Alerts book flights from Boston to London?
- No — we do not sell tickets. FlexTrip Alerts watches prices and emails you when a fare matches your plan. You book on the airline or travel site you prefer when you receive an alert.
- Can I set flexible travel dates for Boston to London alerts?
- Yes. Pick a departure window (not one fixed day) and how many nights you can stay. We match round trips that fit your window, stay length, and max price — then email you when one qualifies.
- How often does FlexTrip Alerts check Boston to London fares?
- We scan aggregated fares on a schedule — about four times per day (every ~6 hours, UTC). You can also trigger an on-demand check from your dashboard, with a short cooldown between manual refreshes.
- What is the cheapest month to fly from Boston to London?
- Based on recent fare samples on this page, October 2026 is currently the cheapest month to fly from Boston to London, with round trips from about EUR 512. Prices change — set an alert to catch the next drop.
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