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Portsmouth

$371+ Cheap flights from Boston (BOS) to Portsmouth, England

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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Mar 20 — Mar 271
Fri 3/20
Fri 3/27
1 adult, Economy
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Cheap flight deals from Boston to Portsmouth

Cheapest flights from Boston to Portsmouth
Explore the most affordable flight options available from Boston to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 18, 2026.

This Kiwi.com deal was found by Cheapflights users on 2/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/19:15 pm
BOS
-
SOU
1 stop14h 20m
Aer Lingus
Wed 4/89:10 am
SOU
-
BOS
1 stop14h 40m
Aer Lingus
Deal found 2/15$668
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/227:10 pm
BOS
-
SOU
1 stop32h 10m
Delta
Tue 3/175:35 pm
SOU
-
BOS
1 stop24h 45m
Delta
Deal found 2/16$681
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/2210:03 am
BOS
-
SOU
2 stops17h 17m
Delta
Mon 3/165:40 pm
SOU
-
BOS
1 stop24h 40m
Delta
Deal found 2/16$685
This Kiwi.com deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/25:20 pm
BOS
-
SOU
1 stop10h 20m
Aer Lingus
Thu 4/99:10 am
SOU
-
BOS
1 stop14h 40m
Aer Lingus
Deal found 2/16$699
This Delta deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/168:25 pm
BOS
-
SOU
1 stop15h 25m
Delta
Fri 9/259:05 am
SOU
-
BOS
2 stops18h 31m
Delta
Deal found 2/17$705
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/201:10 pm
BOS
-
SOU
2 stops14h 25m
Delta
Mon 10/265:30 pm
SOU
-
BOS
2 stops25h 52m
Delta
Deal found 2/16$709
This Kiwi.com deal was found by Cheapflights users on 2/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/35:20 pm
BOS
-
SOU
1 stop10h 20m
Aer Lingus
Fri 4/109:10 am
SOU
-
BOS
1 stop14h 40m
Aer Lingus
Deal found 2/17$728
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/217:10 pm
BOS
-
SOU
1 stop17h 05m
Delta
Tue 3/175:35 pm
SOU
-
BOS
1 stop24h 45m
Delta
Deal found 2/16$731
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/261:04 pm
BOS
-
SOU
2 stops14h 16m
Delta
Tue 3/175:35 pm
SOU
-
BOS
1 stop24h 45m
Delta
Deal found 2/16$735
This KLM deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:25 pm
BOS
-
SOU
1 stop31h 10m
KLM
Fri 9/189:05 am
SOU
-
BOS
1 stop14h 25m
KLM
Deal found 2/16$745
This Delta deal was found by Cheapflights users on 2/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/211:30 am
BOS
-
SOU
2 stops16h 05m
Delta
Thu 4/99:05 am
SOU
-
BOS
1 stop12h 20m
Delta
Deal found 2/16$749

Find flight deals from Boston to Portsmouth

Keep the following information in mind while searching for Boston to Portsmouth flight deals. Data was last updated February 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$668
(Kiwi.com)

One-way from

$371
(Delta)

Popular in

June

Cheapest in

October

Average price

$548
Provider with most accurate pricing for Boston Logan Intl-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Boston Logan Intl-London (LON) flights.
Search Deals
From Boston Logan Intl to Portsmouth
Search Deals
One-way flight from Boston Logan Intl to Portsmouth
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Boston to Portsmouth 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 2,558,603 searches. Data last updated February 18, 2026.
Use the filters below to find and compare flights from Boston to Portsmouth that are best for you.

Fly from

Boston

Fly to

Portsmouth

Route

Depart

Return

Price

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 4/1

9:15 pm-4:35 pm

1 stop14h 20m

Southampton Eastleigh

Wed 4/8

9:10 am-6:50 pm

1 stop14h 40m

$668

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 4/3

11:30 am-8:45 am

2 stops16h 15m

Southampton Eastleigh

Fri 4/10

9:05 am-4:25 pm

1 stop12h 20m

$749

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 4/2

11:30 am-8:35 am

2 stops16h 05m

Southampton Eastleigh

Thu 4/9

9:05 am-4:25 pm

1 stop12h 20m

$749

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 4/30

12:30 pm-8:35 am

2 stops15h 05m

Southampton Eastleigh

Tue 5/19

9:05 am-10:49 pm

2 stops18h 44m

$760

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 4/30

5:25 pm-8:40 am

1 stop10h 15m

Southampton Eastleigh

Tue 5/19

9:10 am-2:55 pm

1 stop10h 45m

$787

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 4/1

11:55 am-8:35 am

2 stops15h 40m

Southampton Eastleigh

Wed 4/8

9:05 am-4:25 pm

1 stop12h 20m

$830

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 8/6

4:45 pm-8:45 am

1 stop11h 00m

Southampton Eastleigh

Sun 8/16

5:30 pm-4:37 pm

1 stop28h 07m

$862

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 4/20

8:25 pm-8:35 am

1 stop31h 10m

$371

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 4/18

8:10 am-8:45 am

2 stops19h 35m

$376

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 7/6

11:30 pm-7:30 pm

1 stop15h 00m

$405

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/15

Showing 1-10 of 15 results
1
2

Best time to book a flight from Boston to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Boston with our price prediction graph.
Estimated round-trip 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 Portsmouth

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

Currently, August is the cheapest month in which you can book a flight from Boston to Portsmouth (average of $311). Flying from Boston to Portsmouth in June is currently the most expensive (average of $544). 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.

What is the cheapest time of day to fly from BOS to P0R?

Find hourly flight availability from Boston to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 18, 2026.

When flying from Boston to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Boston to Portsmouth

Explore weekly flight availability from Boston to Portsmouth. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated February 18, 2026.

The most flights from BOS to P0R are scheduled on a Monday (32 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (28 on average).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portsmouth. Reviews last updated February 18, 2026.
See what other customers who have flown with Delta and Aer Lingus from Boston to Portsmouth have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,206 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,206 reviews
Delta
7.9
Good
8,206 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Aer Lingus
7.2
Good
1,455 reviews
Delta
7.9
Good
8,206 reviews

Overall

7.9

Comfort

7.9

Entertainment

7.8

Boarding

8.1

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

  • What airport do you fly from for flights from Boston to Portsmouth?

    If you book a flight to Portsmouth from Boston, you will be flying from Logan Intl, which is the city’s only airport. Boston Logan Intl (BOS) is located 2.6 mi from the center of Boston. There are 0 flights from Logan Intl to Portsmouth per day from 18 different airlines.

  • How long is the flight from Boston to Portsmouth?

    For as low as $668, Aer Lingus can have you in Portsmouth from Boston in 14h 20m. There are 3228 mi between Boston and Portsmouth. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most reliable airlines from Boston to Portsmouth?

    Before booking your flight to Portsmouth from Boston, check out the most reliable airlines to get you to your destination on time: Gulf Air (91%), Malaysia Airlines (87%), American Airlines( 80%).

  • What are the cheapest flights from Boston to Portsmouth?

    While on average a flight from Boston to Portsmouth is generally $1,987, our data shows the cheapest flight currently is $224. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $699 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to Portsmouth 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 Portsmouth?

    Currently, August is the cheapest month in which you can book a flight from Boston to Portsmouth (average of $311). Flying from Boston to Portsmouth in June is currently the most expensive (average of $544). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 10 airlines flying from Boston to Portsmouth

Discover the top 10 airlines that operate flights from Boston to Portsmouth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated February 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$261Average$634FlexibilityNo cancel feeOn-time62%
SWISSCheapest$293Average$617FlexibilityNo cancel feeOn-time79%
PLAYCheapest$374Average$489FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$393Average$700FlexibilityNo cancel feeOn-time77%
TAP AIR PORTUGALCheapest$425Average$454FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$460Average$615FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$466Average$651FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$467Average$801FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$467Average$612FlexibilityNo cancel feeOn-time76%
IcelandairCheapest$469Average$580FlexibilityNo cancel feeOn-time76%

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