FlexTrip Alerts

Flight price alerts: Boston → London

Sample round trips on this route start around EUR 713; August 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 713. Cheapest month in our next-3-month sample: August 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 · 5 nights
    Mon 31 Aug · 20:50
    Return Sat 05 Sept · 06:35

    EUR 713

    See deal
  • Round trip · 9 nights
    Tue 11 Aug · 21:49
    Return Thu 20 Aug · 12:20

    EUR 768

    See deal
  • Round trip · 10 nights
    Thu 13 Aug · 15:35
    Return Sun 23 Aug · 09:30

    EUR 776

    See deal
  • Round trip · 9 nights
    Fri 14 Aug · 10:40
    Return Sun 23 Aug · 09:30

    EUR 776

    See deal
  • Round trip · 11 nights
    Wed 12 Aug · 18:25
    Return Sun 23 Aug · 09:30

    EUR 802

    See deal
  • Round trip · 10 nights
    Fri 14 Aug · 18:25
    Return Mon 24 Aug · 14:05

    EUR 802

    See deal
  • Round trip · 14 nights
    Mon 10 Aug · 05:45
    Return Mon 24 Aug · 14:05

    EUR 806

    See deal
  • Round trip · 10 nights
    Wed 12 Aug · 18:25
    Return Sat 22 Aug · 17:40

    EUR 806

    See deal
  • Round trip · 11 nights
    Thu 13 Aug · 15:35
    Return Mon 24 Aug · 14:05

    EUR 806

    See deal
  • Round trip · 5 nights
    Sat 15 Aug · 15:35
    Return Thu 20 Aug · 14:05

    EUR 806

    See deal
  • Round trip · 8 nights
    Sat 15 Aug · 15:35
    Return Sun 23 Aug · 09:30

    EUR 806

    See deal
  • Round trip · 7 nights
    Sun 16 Aug · 05:45
    Return Sun 23 Aug · 09:30

    EUR 806

    See deal
  • Round trip · 6 nights
    Sat 15 Aug · 19:23
    Return Fri 21 Aug · 10:50

    EUR 808

    See deal
  • Round trip · 4 nights
    Thu 20 Aug · 12:27
    Return Mon 24 Aug · 10:50

    EUR 809

    See deal
  • Round trip · 11 nights
    Tue 11 Aug · 06:00
    Return Sat 22 Aug · 07:45

    EUR 811

    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, August 2026 is currently the cheapest month to fly from Boston to London, with round trips from about EUR 713. Prices change — set an alert to catch the next drop.

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Boston (BOS) → New York (JFK)Boston (BOS) → Los Angeles (LAX)Boston (BOS) → Miami (MIA)Boston (BOS) → Paris (PAR)Boston (BOS) → Dublin (DUB)Athens (ATH) → London (LON)

Flying to London?

See all 37 departure cities with price alerts into London (All Airports) (LON).

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