Cheap flights from Boston to London from $295 BOS → LCY, LGW, LHR, LTN, STN
Logan International Airport (BOS) → London City Airport (LCY), London Gatwick Airport (LGW), London Heathrow Airport (LHR), London Luton Airport (LTN), Stansted Airport (STN)
The cheapest return found recently is $603 with Icelandair, 6 Mar 2027 – 14 Mar 2027, found yesterday. The cheapest one-way found recently is $295 with TAP Air Portugal, 1 Nov 2027, found today.
- Cheapest one-way found recently
- $295, found today
- Cheapest return found recently
- $603, 6 Mar 2027 to 14 Mar 2027
- Usual return price
- $603 to $773
- Cheapest month to fly
- December 2026, return fares from $573 found in the last 7 days
- Airlines with nonstop flights
- British Airways, jetBlue, American Airlines, Virgin Atlantic
Return
The cheapest return fare on each of 5 departure dates is usually $603 to $773.
Cheapest return found recently
$603
6 Mar 2027 – 14 Mar 2027 · Icelandair
Logan International Airport (BOS) → London Luton Airport (LTN)
Leaves 7:50 p.m. · Return leaves 6:00 a.m. · 29 h 5 min of travel, both ways together
out 1 stop, back 1 stop · via Keflavik International Airport (KEF) · separate tickets likely: collect your bags and check in again · connection may need a visa · 8 h connection
found yesterday
Cheapest nonstop return
$998
24 Nov – 11 Dec · British Airways
Logan International Airport (BOS) → London Heathrow Airport (LHR)
Leaves 7:30 a.m. · Return leaves 12:40 a.m. · 14 h 10 min of travel, both ways together
out nonstop, back nonstop
found 8 hours ago
Found recently, and the cheapest we hold
$603 6 Mar 2027 – 14 Mar 2027found yesterdaySee prices for these dates
$573 7 Dec – 10 Decfound 5 days agoSee prices for these dates
What have prices looked like?
Over 50 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $441 to $723.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 5 departure dates from 24 Nov to 1 Oct 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 8-night return fares leaving within 3 days of 6 Mar 2027 to compare.
Every date we hold
122 fares on 5 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 24 Nov – 11 Dec | $773 | TAP Air Portugal | Logan International Airport (BOS) → London Gatwick Airport (LGW) | out 1 stop, back 1 stop | found 8 hours ago | See prices for these dates |
| 7 Dec – 10 Dec | $573 | Icelandair | Logan International Airport (BOS) → London Heathrow Airport (LHR) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 20 Feb 2027 – 27 Feb 2027 | $708 | TAP Air Portugal | Logan International Airport (BOS) → London Luton Airport (LTN) | out 2 stops, back 2 stops | found 6 days ago | See prices for these dates |
| 6 Mar 2027 – 14 Mar 2027 | $603 | Icelandair | Logan International Airport (BOS) → London Luton Airport (LTN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 1 Oct 2027 – 4 Oct 2027 | $780 | SAS Scandinavian | Logan International Airport (BOS) → London Heathrow Airport (LHR) | out 2 stops, back 1 stop | found 4 days ago | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $573.
Airlines on the cheapest dates: TAP Air Portugal, Icelandair, SAS Scandinavian.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$295
1 Nov 2027 · TAP Air Portugal
Logan International Airport (BOS) → London Gatwick Airport (LGW)
Leaves 11:45 p.m. · 16 h 50 min trip
1 stop
found today
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$295 1 Nov 2027found todayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 48 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $260 to $327.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 1 Nov 2027 to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 1 Nov 2027 | $295 | TAP Air Portugal | Logan International Airport (BOS) → London Gatwick Airport (LGW) | 1 stop | found today | Open this trip |
Airlines on the cheapest dates: TAP Air Portugal.
Premium cabin fares from Boston to London
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 6 Mar 2027 – 14 Mar 2027 in another cabin: Premium economy · Business · First
Today's prices for 1 Nov 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Boston to London?
Return
Fares 14 to 29 days before departure were typically 28% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 12 Nov (50 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $788 | $685 | +38% | 9 |
| 7–13 days | $638 | $573 | +12% | 21 |
| 14–29 days | $571 | $441 | Cheapest seen | 39 |
| 30–59 days | $649 | $458 | +14% | 44 |
| 60–89 days | $820 | $538 | +44% | 28 |
| 90–179 days | $647 | $533 | +13% | 50 |
| 180+ days | $780 | $495 | +37% | 25 |
One-way
The cheapest fares were 90 to 179 days before departure.
From the cheapest one-way each day between 24 Sept and 12 Nov (48 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 30–59 days | $275 | $270 | +1% | 14 |
| 60–89 days | $304 | $277 | +11% | 21 |
| 90–179 days | $273 | $260 | Cheapest seen | 19 |
| 180+ days | $286 | $279 | +5% | 32 |
Live price for these dates
The cheapest return found recently is for 6 Mar 2027 – 14 Mar 2027. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Boston to London?
The cheapest return found recently is $603 with Icelandair, 6 Mar 2027 to 14 Mar 2027, found yesterday. The cheapest return we hold, of any age, is $573 with Icelandair, 7 Dec to 10 Dec, found 5 days ago. The cheapest return fare on each of 5 departure dates is usually $603 to $773.
How much is a one-way flight from Boston to London?
The cheapest one-way found recently is $295 with TAP Air Portugal, 1 Nov 2027, found today.
What is the cheapest month to fly from Boston to London?
December 2026 is the cheapest month for a return, from $573, 7 Dec to 10 Dec, found 5 days ago.
How far ahead should I book a flight from Boston to London?
In 50 days of prices between 24 Sept and 12 Nov, return fares 14 to 29 days before departure were typically 28% lower than 0 to 6 days before departure. In 48 days of prices between 24 Sept and 12 Nov, one-way fares were cheapest 90 to 179 days before departure.
Is there a direct flight from Boston to London?
Yes, the cheapest nonstop return found recently is $998 with British Airways, 24 Nov to 11 Dec, found 8 hours ago.
How long is the flight from Boston to London?
The cheapest one-way found recently, with TAP Air Portugal on 1 Nov 2027, takes 16 h 50 min with 1 stop.
Which airlines have the cheapest flights from Boston to London?
Between 24 Nov and 1 Oct 2027, TAP Air Portugal has the cheapest return on 2 of the 5 departure dates we hold, Icelandair on 2 and SAS Scandinavian on 1.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work