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Cheap flights from Boston to London from $348

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 10/6. 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

Aer Lingus Logo
5:30 pm - 4:45 pmBOS-SOU
18h 15m1 stop
Aer Lingus Logo
9:10 am - 2:40 pmSOU-BOS
10h 30m1 stop
$804Aer Lingus
Find Deal
Sun, Sep 14 - Sun, Sep 21
Logo
5:30 pm - 7:00 pmBOS-SOU
20h 30m2 stops
Logo
9:10 am - 6:45 pmSOU-BOS
14h 35m1 stop
$809
Find Deal
Sun, Sep 14 - Tue, Sep 23
Delta Logo
4:50 pm - 8:45 amBOS-SOU
10h 55m1 stop
Delta Logo
6:25 pm - 6:25 pmSOU-BOS
29h 00m1 stop
$810Delta
Find Deal
Tue, Aug 12 - Mon, Aug 18
Delta Logo
8:15 pm - 8:45 amBOS-SOU
31h 30m1 stop
Delta Logo
5:35 pm - 6:25 pmSOU-BOS
29h 50m1 stop
$812Delta
Find Deal
Wed, Aug 13 - Sat, Aug 23
Delta Logo
5:40 am - 8:45 amBOS-SOU
22h 05m2 stops
Delta Logo
6:25 pm - 6:25 pmSOU-BOS
29h 00m1 stop
$814Delta
Find Deal
Tue, Aug 12 - Mon, Aug 18
Delta Logo
1:35 pm - 5:50 pmBOS-SOU
23h 15m2 stops
Delta Logo
9:20 am - 4:35 pmSOU-BOS
12h 15m1 stop
$816Delta
Find Deal
Wed, Aug 13 - Fri, Aug 22
Delta Logo
6:45 pm - 8:45 amBOS-SOU
9h 00m1 stop
Delta Logo
6:25 pm - 6:31 pmSOU-BOS
29h 06m2 stops
$820Delta
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Tue, Aug 12 - Tue, Aug 19
KLM Logo
8:50 pm - 5:00 pmBOS-SOU
15h 10m1 stop
KLM Logo
9:30 am - 6:55 pmSOU-BOS
14h 25m1 stop
$1,122KLM
Find Deal
Mon, Dec 22 - Sun, Jan 4
British Airways Logo
9:20 pm - 3:35 pmBOS-SOU
13h 15m1 stop
British Airways Logo
6:50 am - 10:46 pmSOU-BOS
20h 56m2 stops
$1,196British Airways
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Thu, Nov 13 - Mon, Nov 17
British Airways Logo
4:50 pm - 12:00 pmBOS-SOU
14h 10m2 stops
British Airways Logo
9:10 am - 2:40 pmSOU-BOS
10h 30m1 stop
$1,287British Airways
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Wed, Oct 1 - Tue, Oct 7

KLM flights from Boston to Southampton

Our best KLM deals on Boston to Southampton flight tickets
KLM
Aug 7
BOS4:50 pmBoston Logan Intl
20h 00m
1 stop
SOU5:50 pmSouthampton Eastleigh
Aug 19
SOU6:25 pmSouthampton Eastleigh
27h 10m
1 stop
BOS4:35 pmBoston Logan Intl
$910
Find similar
KLM
Dec 22
BOS8:50 pmBoston Logan Intl
15h 10m
1 stop
SOU5:00 pmSouthampton Eastleigh
Jan 4
SOU9:30 amSouthampton Eastleigh
14h 25m
1 stop
BOS6:55 pmBoston Logan Intl
$1,122
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Aer Lingus flights from Boston to Southampton

Our best Aer Lingus deals on Boston to Southampton flight tickets
Aer Lingus
Sep 14
BOS5:30 pmBoston Logan Intl
18h 15m
1 stop
SOU4:45 pmSouthampton Eastleigh
Sep 21
SOU9:10 amSouthampton Eastleigh
10h 30m
1 stop
BOS2:40 pmBoston Logan Intl
$804
Find similar
Aer Lingus
Aug 6
BOS5:30 pmBoston Logan Intl
10h 10m
1 stop
SOU8:40 amSouthampton Eastleigh
Aug 20
SOU8:00 pmSouthampton Eastleigh
23h 40m
1 stop
BOS2:40 pmBoston Logan Intl
$874
Find similar
Aer Lingus
Aug 6
BOS9:25 pmBoston Logan Intl
17h 05m
1 stop
SOU7:30 pmSouthampton Eastleigh
Aug 20
SOU8:00 pmSouthampton Eastleigh
23h 40m
1 stop
BOS2:40 pmBoston Logan Intl
$875
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 August 2, 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

Sun 9/14

5:30 pm-4:45 pm

1 stop18h 15m

Southampton Eastleigh

Sun 9/21

9:10 am-2:40 pm

1 stop10h 30m

$804

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 9/14

5:30 pm-7:00 pm

2 stops20h 30m

Southampton Eastleigh

Tue 9/23

9:10 am-6:45 pm

1 stop14h 35m

$809

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 8/12

4:50 pm-8:45 am

1 stop10h 55m

Southampton Eastleigh

Mon 8/18

6:25 pm-6:25 pm

1 stop29h 00m

$810

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 8/13

8:15 pm-8:45 am

1 stop31h 30m

Southampton Eastleigh

Sat 8/23

5:35 pm-6:25 pm

1 stop29h 50m

$812

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 8/12

5:40 am-8:45 am

2 stops22h 05m

Southampton Eastleigh

Mon 8/18

6:25 pm-6:25 pm

1 stop29h 00m

$814

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 8/13

1:35 pm-5:50 pm

2 stops23h 15m

Southampton Eastleigh

Fri 8/22

9:20 am-4:35 pm

1 stop12h 15m

$816

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 8/12

6:45 pm-8:45 am

1 stop9h 00m

Southampton Eastleigh

Tue 8/19

6:25 pm-6:31 pm

2 stops29h 06m

$820

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 12/22

8:50 pm-5:00 pm

1 stop15h 10m

Southampton Eastleigh

Sun 1/4

9:30 am-6:55 pm

1 stop14h 25m

$1,122

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 11/13

9:20 pm-3:35 pm

1 stop13h 15m

Southampton Eastleigh

Mon 11/17

6:50 am-10:46 pm

2 stops20h 56m

$1,196

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 10/1

4:50 pm-12:00 pm

2 stops14h 10m

Southampton Eastleigh

Tue 10/7

9:10 am-2:40 pm

1 stop10h 30m

$1,287

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

Best Price Found

$348

Fastest flight time

9h 00m

Direct flights

None

Airports in Southampton

1 airport
The best one-way flight to Southampton from Boston in the past 72 hours is $348. The best round-trip flight deal from Boston to Southampton found on momondo in the last 72 hours is $804.
The fastest flight from Boston to Southampton takes 9h 00m
There are no direct flights from Boston to Southampton. Popular non-direct route for this connection is Boston Logan Intl Airport - Southampton Eastleigh Airport.
There is 1 airport near Southampton: Southampton Eastleigh (SOU)
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 00m, 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
8.0
7,983 reviews
Search Delta flights
KLMPriceFrom $743Free CancellationRating
7.8
1,384 reviews
Search KLM flights
Aer LingusPriceFrom $763Free CancellationRating
7.1
1,193 reviews
Search Aer Lingus flights

Traveling to a place near London?

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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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