$337 Cheap United flights Boston (BOS) to London (LHR)

View $337 flight on Fri, May 8, 2026Opens in a new window

$337 Cheap United flights Boston (BOS) to London (LHR)

Prices were available within the past 7 days and start at $337 for one-way flights and $692 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, May 12 - Wed, May 13
BOS
Boston
LHR
London
$692 Roundtrip, found 4 hours ago
$692
Roundtrip
found 4 hours ago
Select United flight, departing Tue, May 12 from Boston to London, returning Wed, May 13, priced at $692 found 4 hours ago
United
Tue, Aug 25 - Thu, Sep 3
BOS
Boston
LHR
London
$743 Roundtrip, found 14 hours ago
$743
Roundtrip
found 14 hours ago
Select United flight, departing Tue, Aug 25 from Boston to London, returning Thu, Sep 3, priced at $743 found 14 hours ago
United
Tue, Oct 6 - Fri, Oct 9
BOS
Boston
LHR
London
$745 Roundtrip, found 1 day ago
$745
Roundtrip
found 1 day ago
Select United flight, departing Tue, Oct 6 from Boston to London, returning Fri, Oct 9, priced at $745 found 1 day ago
United
Fri, Sep 11 - Mon, Sep 21
BOS
Boston
LHR
London
$746 Roundtrip, found 2 days ago
$746
Roundtrip
found 2 days ago
Select United flight, departing Fri, Sep 11 from Boston to London, returning Mon, Sep 21, priced at $746 found 2 days ago
United
Tue, May 12 - Wed, May 13
BOS
Boston
LHR
London
$765 Roundtrip, found 4 hours ago
$765
Roundtrip
found 4 hours ago
Select United flight, departing Tue, May 12 from Boston to London, returning Wed, May 13, priced at $765 found 4 hours ago
United
Tue, May 12 - Wed, May 13
BOS
Boston
LHR
London
$771 Roundtrip, found 4 hours ago
$771
Roundtrip
found 4 hours ago
Select United flight, departing Tue, May 12 from Boston to London, returning Wed, May 13, priced at $771 found 4 hours ago
United
Mon, Aug 31 - Thu, Sep 3
BOS
Boston
LHR
London
$775 Roundtrip, found 14 hours ago
$775
Roundtrip
found 14 hours ago
Select United flight, departing Mon, Aug 31 from Boston to London, returning Thu, Sep 3, priced at $775 found 14 hours ago
United
Tue, May 12 - Wed, May 13
BOS
Boston
LHR
London
$775 Roundtrip, found 4 hours ago
$775
Roundtrip
found 4 hours ago
Select United flight, departing Tue, May 12 from Boston to London, returning Wed, May 13, priced at $775 found 4 hours ago

Alternative airports near London

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Heathrow LHR. Cheapest option available. Average driving time to city center is 28 minutes. Flights from $746
LHR
Heathrow
Cheapest
Average driving time to city center28 min
Flights from $746

Find the cheapest month to fly from Boston (BOS) to London (LHR)

October is typically the cheapest month to fly

From $382 - $507 per traveler.

Travel information

Origin airport
Logan Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, SATA International-Azores Airlines S.A., Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, United, Virgin Atlantic
Popular airline
Virgin Atlantic
Distance
5210 km
Average flight time
11 hours 42 mins

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