FlexTrip Alerts

Flight price alerts: Boston → London

Sample round trips on this route start around EUR 609; November 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 609. Cheapest month in our next-3-month sample: November 2026.

Set an alert and we email you when a round trip drops under your limit.

Set a price alert

Round 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 .

  • Round trip · 4 nights
    Fri 13 Nov · 21:25
    Return Tue 17 Nov · 09:00

    EUR 609

    See deal
  • Round trip · 4 nights
    Fri 08 Jan · 17:35
    Return Tue 12 Jan · 18:40

    EUR 636

    See deal
  • Round trip · 5 nights
    Thu 12 Nov · 17:35
    Return Tue 17 Nov · 06:40

    EUR 674

    See deal
  • Round trip · 12 nights
    Sat 07 Nov · 17:35
    Return Thu 19 Nov · 06:40

    EUR 740

    See deal
  • Round trip · 3 nights
    Sat 07 Nov · 22:10
    Return Tue 10 Nov · 08:15

    EUR 744

    See deal
  • Round trip · 3 nights
    Thu 12 Nov · 10:25
    Return Sun 15 Nov · 13:00

    EUR 754

    See deal
  • Round trip · 5 nights
    Tue 24 Nov · 22:45
    Return Sun 29 Nov · 19:55

    EUR 795

    See deal
  • Round trip · 39 nights
    Wed 23 Dec · 19:50
    Return Sun 31 Jan · 06:00

    EUR 797

    See deal
  • Round trip · 4 nights
    Wed 25 Nov · 18:20
    Return Sun 29 Nov · 18:30

    EUR 819

    See deal
  • Round trip · 47 nights
    Mon 21 Dec · 17:15
    Return Sat 06 Feb · 08:50

    EUR 946

    See deal
  • Round trip · 46 nights
    Tue 22 Dec · 17:15
    Return Sat 06 Feb · 07:50

    EUR 946

    See deal
  • Round trip · 40 nights
    Tue 22 Dec · 17:15
    Return Sun 31 Jan · 12:10

    EUR 948

    See deal
  • Round trip · 26 nights
    Fri 18 Dec · 05:45
    Return Wed 13 Jan · 12:15

    EUR 1034

    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, November 2026 is currently the cheapest month to fly from Boston to London, with round trips from about EUR 609. Prices change — set an alert to catch the next drop.

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