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Cheap flights from Boston to London from $635

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Boston to London departing on 12/4. 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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Cheap round-trip flights

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Multiple Airlines Logo
10:40 pm - 7:20 pmBOS-SOU
15h 40m1 stop
Multiple Airlines Logo
9:30 am - 8:55 pmSOU-BOS
16h 25m2 stops
$635Multiple Airlines
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Thu, Dec 4 - Sat, Dec 13
Aer Lingus Logo
5:10 pm - 8:45 amBOS-SOU
10h 35m1 stop
Aer Lingus Logo
9:30 am - 6:55 pmSOU-BOS
14h 25m1 stop
$667Aer Lingus
Find Deal
Thu, Dec 4 - Sat, Dec 13
KLM Logo
8:50 pm - 5:25 pmBOS-SOU
15h 35m1 stop
KLM Logo
9:30 am - 6:55 pmSOU-BOS
14h 25m1 stop
$767KLM
Find Deal
Sun, Dec 7 - Sun, Dec 14
Delta Logo
5:40 am - 8:05 amBOS-SOU
21h 25m2 stops
Delta Logo
9:25 am - 7:14 pmSOU-BOS
14h 49m2 stops
$780Delta
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Thu, Dec 4 - Sat, Dec 13
KLM Logo
8:50 pm - 5:25 pmBOS-SOU
15h 35m1 stop
KLM Logo
9:25 am - 1:20 pmSOU-BOS
32h 55m1 stop
$794KLM
Find Deal
Wed, Dec 3 - Sat, Dec 6
KLM Logo
1:05 pm - 8:20 amBOS-SOU
14h 15m2 stops
KLM Logo
5:30 pm - 6:55 pmSOU-BOS
30h 25m1 stop
$799KLM
Find Deal
Wed, Dec 3 - Sat, Dec 6
KLM Logo
12:50 pm - 8:20 amBOS-SOU
14h 30m2 stops
KLM Logo
9:25 am - 10:26 pmSOU-BOS
18h 01m2 stops
$809KLM
Find Deal
Wed, Dec 3 - Sat, Dec 6
Delta Logo
4:45 pm - 8:50 amBOS-SOU
11h 05m1 stop
Delta Logo
9:20 am - 4:30 pmSOU-BOS
12h 10m1 stop
$818Delta
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Sun, Mar 29 - Wed, Apr 1
British Airways Logo
3:45 pm - 5:20 pmBOS-SOU
20h 35m2 stops
British Airways Logo
12:25 pm - 6:59 pmSOU-BOS
11h 34m1 stop
$1,171British Airways
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Thu, Feb 12 - Tue, Feb 17
British Airways Logo
2:12 pm - 4:40 pmBOS-SOU
22h 28m2 stops
British Airways Logo
9:30 am - 7:55 pmSOU-BOS
14h 25m1 stop
$1,196British Airways
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Fri, Mar 13 - Sat, Mar 21

Aer Lingus flights from Boston to Southampton

Our best Aer Lingus deals on Boston to Southampton flight tickets
Aer Lingus
Dec 4
BOS5:10 pmBoston Logan Intl
10h 35m
1 stop
SOU8:45 amSouthampton Eastleigh
Dec 13
SOU9:30 amSouthampton Eastleigh
14h 25m
1 stop
BOS6:55 pmBoston Logan Intl
$667
Find similar
Aer Lingus
Dec 11
BOS5:10 pmBoston Logan Intl
10h 35m
1 stop
SOU8:45 amSouthampton Eastleigh
Dec 18
SOU8:10 pmSouthampton Eastleigh
27h 45m
1 stop
BOS6:55 pmBoston Logan Intl
$832
Find similar
Aer Lingus
Dec 11
BOS5:10 pmBoston Logan Intl
10h 35m
1 stop
SOU8:45 amSouthampton Eastleigh
Dec 18
SOU9:30 amSouthampton Eastleigh
29h 25m
2 stops
BOS9:55 amBoston Logan Intl
$839
Find similar

KLM flights from Boston to Southampton

Our best KLM deals on Boston to Southampton flight tickets
KLM
Dec 7
BOS8:50 pmBoston Logan Intl
15h 35m
1 stop
SOU5:25 pmSouthampton Eastleigh
Dec 14
SOU9:30 amSouthampton Eastleigh
14h 25m
1 stop
BOS6:55 pmBoston Logan Intl
$767
Find similar
KLM
Dec 3
BOS8:50 pmBoston Logan Intl
15h 35m
1 stop
SOU5:25 pmSouthampton Eastleigh
Dec 6
SOU9:25 amSouthampton Eastleigh
32h 55m
1 stop
BOS1:20 pmBoston Logan Intl
$794
Find similar
KLM
Dec 3
BOS1:05 pmBoston Logan Intl
14h 15m
2 stops
SOU8:20 amSouthampton Eastleigh
Dec 6
SOU5:30 pmSouthampton Eastleigh
30h 25m
1 stop
BOS6:55 pmBoston Logan Intl
$799
Find similar

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 October 30, 2025.
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

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 12/4

10:40 pm-7:20 pm

1 stop15h 40m

Southampton Eastleigh

Sat 12/13

9:30 am-8:55 pm

2 stops16h 25m

$635

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 12/4

5:10 pm-8:45 am

1 stop10h 35m

Southampton Eastleigh

Sat 12/13

9:30 am-6:55 pm

1 stop14h 25m

$667

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 12/7

8:50 pm-5:25 pm

1 stop15h 35m

Southampton Eastleigh

Sun 12/14

9:30 am-6:55 pm

1 stop14h 25m

$767

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 12/4

5:40 am-8:05 am

2 stops21h 25m

Southampton Eastleigh

Sat 12/13

9:25 am-7:14 pm

2 stops14h 49m

$780

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 12/3

8:50 pm-5:25 pm

1 stop15h 35m

Southampton Eastleigh

Sat 12/6

9:25 am-1:20 pm

1 stop32h 55m

$794

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 12/3

1:05 pm-8:20 am

2 stops14h 15m

Southampton Eastleigh

Sat 12/6

5:30 pm-6:55 pm

1 stop30h 25m

$799

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 12/3

12:50 pm-8:20 am

2 stops14h 30m

Southampton Eastleigh

Sat 12/6

9:25 am-10:26 pm

2 stops18h 01m

$809

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 3/29

4:45 pm-8:50 am

1 stop11h 05m

Southampton Eastleigh

Wed 4/1

9:20 am-4:30 pm

1 stop12h 10m

$818

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 2/12

3:45 pm-5:20 pm

2 stops20h 35m

Southampton Eastleigh

Tue 2/17

12:25 pm-6:59 pm

1 stop11h 34m

$1,171

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 3/13

2:12 pm-4:40 pm

2 stops22h 28m

Southampton Eastleigh

Sat 3/21

9:30 am-7:55 pm

1 stop14h 25m

$1,196

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 day to depart on your flight to Southampton?

On average, the least expensive day to fly to Southampton from Boston is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $831. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Boston to Southampton for around $1,087.

What is the cheapest time of day to depart on your flight to Southampton?

Flying to Southampton from Boston in the morning is the least expensive time of day to depart. momondo users have found prices as low as $822 when looking at flights departing in the morning. Flights to Southampton are more costly in the afternoon, with an average ticket price of $953. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

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

Direct flights

None
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 9h 35m, 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 $666Free CancellationRating
7.9
7,996 reviews
Search Delta flights
Aer LingusPriceFrom $763Free CancellationRating
7.2
1,363 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.

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