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Cheap flights from Boston to London from $397

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to London departing on 9/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Boston to London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
5:25 pm - 8:40 am
BOS
-
SOU
10h 15m
1 stop
Aer Lingus Logo
9:20 am - 10:00 pm
SOU
-
BOS
17h 40m
1 stop
$871Aer Lingus
Sun, May 3 - Sun, May 10
Multiple Airlines Logo
8:50 pm - 7:30 pm
BOS
-
SOU
17h 40m
2 stops
Multiple Airlines Logo
8:00 pm - 6:50 pm
SOU
-
BOS
27h 50m
2 stops
$893Multiple Airlines
Thu, May 7 - Thu, May 14
Aer Lingus Logo
11:30 pm - 4:50 pm
BOS
-
SOU
12h 20m
1 stop
Aer Lingus Logo
9:20 am - 6:50 pm
SOU
-
BOS
14h 30m
1 stop
$928Aer Lingus
Thu, May 7 - Thu, May 14
Multiple Airlines Logo
5:25 pm - 7:30 pm
BOS
-
SOU
21h 05m
1 stop
Multiple Airlines Logo
9:25 am - 9:05 pm
SOU
-
BOS
16h 40m
2 stops
$940Multiple Airlines
Thu, May 7 - Thu, May 14
Multiple Airlines Logo
8:50 pm - 7:30 pm
BOS
-
SOU
17h 40m
2 stops
Multiple Airlines Logo
5:20 pm - 6:50 pm
SOU
-
BOS
30h 30m
3 stops
$972Multiple Airlines
Thu, May 7 - Thu, May 14
Multiple Airlines Logo
5:25 pm - 8:40 am
BOS
-
SOU
10h 15m
1 stop
Multiple Airlines Logo
8:00 pm - 9:05 pm
SOU
-
BOS
54h 05m
2 stops
$994Multiple Airlines
Sun, May 3 - Sun, May 17
Delta Logo
4:35 pm - 8:35 am
BOS
-
SOU
11h 00m
1 stop
Delta Logo
9:05 am - 11:27 pm
SOU
-
BOS
19h 22m
2 stops
$1,001Delta
Mon, Apr 20 - Mon, Apr 27
Delta Logo
9:05 am - 8:35 am
BOS
-
SOU
18h 30m
2 stops
Delta Logo
9:05 am - 11:27 pm
SOU
-
BOS
19h 22m
2 stops
$1,005Delta
Mon, Apr 20 - Mon, Apr 27
Delta Logo
8:25 pm - 4:50 pm
BOS
-
SOU
15h 25m
1 stop
Delta Logo
5:20 pm - 1:10 pm
SOU
-
BOS
24h 50m
1 stop
$1,016Delta
Sun, May 3 - Thu, May 21
Delta Logo
5:50 am - 8:35 am
BOS
-
SOU
21h 45m
2 stops
Delta Logo
9:05 am - 4:25 pm
SOU
-
BOS
12h 20m
1 stop
$1,020Delta
Sun, May 3 - Thu, May 21

KLM flights from Boston to Southampton

Our best KLM deals on Boston to Southampton flight tickets
KLM
Aug 6
BOS4:45 pmBoston Logan Intl
11h 00m
1 stop
SOU8:45 amSouthampton Eastleigh
Aug 16
SOU5:30 pmSouthampton Eastleigh
30h 00m
1 stop
BOS6:30 pmBoston Logan Intl
$1,132
KLM
Aug 6
BOS1:35 pmBoston Logan Intl
14h 10m
2 stops
SOU8:45 amSouthampton Eastleigh
Aug 16
SOU5:30 pmSouthampton Eastleigh
30h 00m
1 stop
BOS6:30 pmBoston Logan Intl
$1,137
KLM
Aug 6
BOS4:45 pmBoston Logan Intl
19h 50m
1 stop
SOU5:35 pmSouthampton Eastleigh
Aug 16
SOU5:30 pmSouthampton Eastleigh
30h 00m
1 stop
BOS6:30 pmBoston Logan Intl
$1,182

Aer Lingus flights from Boston to Southampton

Our best Aer Lingus deals on Boston to Southampton flight tickets
Aer Lingus
May 3
BOS5:25 pmBoston Logan Intl
10h 15m
1 stop
SOU8:40 amSouthampton Eastleigh
May 10
SOU9:20 amSouthampton Eastleigh
17h 40m
1 stop
BOS10:00 pmBoston Logan Intl
$871
Aer Lingus
May 7
BOS11:30 pmBoston Logan Intl
12h 20m
1 stop
SOU4:50 pmSouthampton Eastleigh
May 14
SOU9:20 amSouthampton Eastleigh
14h 30m
1 stop
BOS6:50 pmBoston Logan Intl
$928
Aer Lingus
May 3
BOS11:40 amBoston Logan Intl
16h 00m
2 stops
SOU8:40 amSouthampton Eastleigh
May 10
SOU9:20 amSouthampton Eastleigh
19h 39m
2 stops
BOS11:59 pmBoston Logan Intl
$1,075

momondo Fare Finder

 
Customize your flight search to find flights from Boston to Southampton that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Boston to Southampton that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 5/3

5:25 pm-8:40 am

1 stop10h 15m

Southampton Eastleigh

Sun 5/10

9:20 am-10:00 pm

1 stop17h 40m

$871

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 5/7

8:50 pm-7:30 pm

2 stops17h 40m

Southampton Eastleigh

Thu 5/14

8:00 pm-6:50 pm

2 stops27h 50m

$893
Quickest round-trip

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 5/7

11:30 pm-4:50 pm

1 stop12h 20m

Southampton Eastleigh

Thu 5/14

9:20 am-6:50 pm

1 stop14h 30m

$928

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 5/7

5:25 pm-7:30 pm

1 stop21h 05m

Southampton Eastleigh

Thu 5/14

9:25 am-9:05 pm

2 stops16h 40m

$940

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 5/7

8:50 pm-7:30 pm

2 stops17h 40m

Southampton Eastleigh

Thu 5/14

5:20 pm-6:50 pm

3 stops30h 30m

$972

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 5/3

5:25 pm-8:40 am

1 stop10h 15m

Southampton Eastleigh

Sun 5/17

8:00 pm-9:05 pm

2 stops54h 05m

$994

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 4/20

4:35 pm-8:35 am

1 stop11h 00m

Southampton Eastleigh

Mon 4/27

9:05 am-11:27 pm

2 stops19h 22m

$1,001

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 4/20

9:05 am-8:35 am

2 stops18h 30m

Southampton Eastleigh

Mon 4/27

9:05 am-11:27 pm

2 stops19h 22m

$1,005

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 5/3

8:25 pm-4:50 pm

1 stop15h 25m

Southampton Eastleigh

Thu 5/21

5:20 pm-1:10 pm

1 stop24h 50m

$1,016

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 5/3

5:50 am-8:35 am

2 stops21h 45m

Southampton Eastleigh

Thu 5/21

9:05 am-4:25 pm

1 stop12h 20m

$1,020

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Boston to Southampton

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Boston Logan Intl to Southampton Eastleigh?

KLM and Delta are the most popular carriers operating from Boston Logan Intl to Southampton Eastleigh

What airlines fly to Southampton?

British Airways, Delta and American Airlines are the top three most popular airlines that fly to Southampton from Boston according to our data. British Airways is the first choice among our users, with 51% of people opting to fly with this airline when traveling to Southampton. Keep in mind that there are 18 different airlines that fly to Southampton on a routine basis, so you have a few additional options to choose from.

When to book flights from Boston to Southampton

Are you open to changing your travel dates? Check out the ideal times to fly from Boston to Southampton according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Boston to Southampton (BOS to SOU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boston to Southampton

Fastest flight time

10h 15m

Direct flights

None
The fastest flight from Boston to Southampton takes 10h 15m
There are no direct flights from Boston to Southampton. There are no popular flight routes from Boston to Southampton.
Search flight deals

  • How far is Boston Logan Intl to Southampton Eastleigh by plane?

    A flight from Boston Logan Intl to Southampton Eastleigh will travel around 3229.1 mi. Flights usually cover this in 10h 15m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Boston Logan Intl Airport to Southampton Eastleigh Airport?

    Prices for flights from Boston Logan Intl Airport to Southampton Eastleigh Airport were last updated today.

  • How many operators does momondo search for flights from Boston Logan Intl Airport to Southampton Eastleigh Airport?

  • How old do you have to be to fly from Boston Logan Intl Airport to Southampton Eastleigh Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Boston Logan Intl Airport to Southampton Eastleigh Airport.

  • What documentation or ID do you need to fly to Southampton Eastleigh Airport?

    The necessary travel and health documents for your Southampton Eastleigh Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Boston to Southampton?

Best airlines flying from Boston to Southampton

Compare and see reviews for airlines that fly from Boston to Southampton with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $515Free CancellationRating
7.9
8,317 reviews
Search Delta flights
Aer LingusPriceFrom $698Free CancellationRating
7.2
1,487 reviews
Search Aer Lingus flights

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Portsmouth

Why use momondo?

Why should I use momondo to find a flight deal from Boston to Southampton?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Boston to Southampton. momondo saves you time and could save you money on your trip.

Can I find flights from Boston to Southampton with flexible booking policies on momondo?

momondo does allow users to show only those flights to Southampton from Boston which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Boston to Southampton?

momondo provides multiple filters to help you find the best flight to Southampton from Boston. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Boston to Southampton right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Boston to Southampton flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Southampton trip

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