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Cheap flights from Boston to Southampton from £341

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SOU
21 Apr — 28 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Boston to Southampton

Enter your travel dates to find the best prices.

Cheapest flights from Boston to Southampton
Explore the most affordable flight options available from Boston to Southampton. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 22 March 2026.

Sun 3/517:25
BOS
-
SOU
1 stop10h 15m
Aer Lingus
Sun 10/509:20
SOU
-
BOS
1 stop17h 40m
Aer Lingus
Deal found 19/3£653
Wed 30/923:00
BOS
-
SOU
1 stop28h 45m
Multiple Airlines
Sun 11/1008:25
SOU
-
BOS
2 stops18h 40m
Multiple Airlines
Deal found 20/3£677
Tue 6/1017:25
BOS
-
SOU
1 stop9h 40m
Multiple Airlines
Sun 18/1014:50
SOU
-
BOS
2 stops35h 25m
Multiple Airlines
Deal found 18/3£681
Sat 2/517:25
BOS
-
SOU
1 stop10h 10m
Multiple Airlines
Sat 9/518:10
SOU
-
BOS
2 stops51h 00m
Multiple Airlines
Deal found 17/3£708
Sun 3/517:25
BOS
-
SOU
1 stop10h 15m
Multiple Airlines
Sun 10/512:35
SOU
-
BOS
2 stops36h 45m
Multiple Airlines
Deal found 19/3£745
Tue 6/1016:45
BOS
-
SOU
1 stop10h 50m
KLM
Sun 18/1017:20
SOU
-
BOS
1 stop30h 10m
KLM
Deal found 21/3£773
Wed 30/913:10
BOS
-
SOU
2 stops14h 25m
Delta
Sun 11/1009:15
SOU
-
BOS
2 stops18h 11m
Delta
Deal found 20/3£785
Mon 23/320:10
BOS
-
SOU
1 stop32h 10m
KLM
Mon 30/317:20
SOU
-
BOS
1 stop28h 05m
KLM
Deal found 22/3£785
Tue 6/1017:25
BOS
-
SOU
1 stop9h 40m
Aer Lingus
Sun 18/1009:20
SOU
-
BOS
1 stop10h 35m
Aer Lingus
Deal found 17/3£791

Find flight deals from Boston to Southampton

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) to Southampton (SOU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 22 March 2026.

Round-trip from

£653

One-way from

£341

Popular in

June

Cheapest in

October

Average price

£437
Aer Lingus
  • Aer Lingus
  • 3/5-10/5
  • 2 total stops
  • 27h 55m total
  • Boston to Southampton
Search Deals
KLM
  • KLM
  • 4/7
  • 1 total stop
  • 11h 05m total
  • Boston to Southampton
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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, Cheapflights users made 858,174 searches. Data last updated 22 March 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 return flight

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 13/4

16:35-16:50

1 stop19h 15m

Southampton Eastleigh

Sun 19/4

17:20-16:25

1 stop28h 05m

£833

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 14/4

13:06-08:35

2 stops14h 29m

Southampton Eastleigh

Sun 19/4

17:20-13:13

1 stop24h 53m

£836

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 6/8

16:45-17:35

1 stop19h 50m

Southampton Eastleigh

Sun 16/8

17:30-18:30

1 stop30h 00m

£848

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 19/5

16:35-08:35

1 stop11h 00m

Southampton Eastleigh

Sun 31/5

17:20-13:05

1 stop24h 45m

£1,000

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 18/7

09:05-08:45

2 stops18h 40m

Southampton Eastleigh

Sat 25/7

09:15-13:18

1 stop33h 03m

£1,039

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 18/7

05:30-08:45

2 stops22h 15m

Southampton Eastleigh

Sun 26/7

17:30-13:18

1 stop24h 48m

£1,039

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 16/6

18:55-16:50

1 stop16h 55m

Southampton Eastleigh

Fri 3/7

17:20-18:30

1 stop30h 10m

£1,064
Fastest return journey

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 28/6

07:00-08:35

2 stops20h 35m

Southampton Eastleigh

Fri 3/7

09:05-18:30

1 stop14h 25m

£1,115
Cheapest one-way
Fastest single journey

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 4/7

16:40-08:45

1 stop11h 05m

£341

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 4/7

23:00-12:05

3 stops32h 05m

£363

Flights are sorted by cheapest return flights first.

Deals found on 21/3

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Boston to Southampton

Have a flexible travel schedule? Discover the best time to fly to Southampton from Boston with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Boston to Southampton

What is the cheapest month to book a flight from Boston to Southampton?

Currently, April is the cheapest month in which you can book a flight from Boston to Southampton (average of £155). Flying from Boston to Southampton in June is currently the most expensive (average of £420). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Boston to Southampton. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Boston to Southampton?

    Departing from Boston to Southampton will take you 19h 15m. The distance from Boston to Southampton is about 3228 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Boston to Southampton that include hotel bookings?

    Yes. In addition to deals on Boston to Southampton flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Boston to Southampton?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boston to Southampton.

  • Can I find deals for business class flights from Boston to Southampton?

    Yes. Cheapflights offers flight deals from Boston to Southampton by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Boston to Southampton?

    Currently, April is the cheapest month in which you can book a flight from Boston to Southampton (average of £155). Flying from Boston to Southampton in June is currently the most expensive (average of £420). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Why should you use Cheapflights to find cheap flight tickets from Boston to Southampton?

Millions of users choose and trust Cheapflights to book the best flight deals from Boston to Southampton for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Boston to Southampton with no change fees?

Need flexible booking options for your flight to Southampton from Boston? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Boston to Southampton become cheaper?

Not ready to book yet? You can track prices for flights from Boston to Southampton on Cheapflights with our Price Alert feature and get notified when better prices are available.

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