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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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
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 January 21, 2026.

This KLM deal was found by Cheapflights users on 1/20. 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.
Wed 10/78:25 pm
BOS
-
SOU
1 stop15h 25m
KLM
Mon 10/195:20 pm
SOU
-
BOS
1 stop28h 20m
KLM
Deal found 1/20$689
This KLM deal was found by Cheapflights users on 1/19. 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.
Mon 10/58:25 pm
BOS
-
SOU
1 stop15h 25m
KLM
Mon 10/195:20 pm
SOU
-
BOS
1 stop28h 20m
KLM
Deal found 1/19$690
This KLM deal was found by Cheapflights users on 1/20. 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.
Tue 10/64:35 pm
BOS
-
SOU
1 stop11h 00m
KLM
Sun 10/185:20 pm
SOU
-
BOS
1 stop30h 10m
KLM
Deal found 1/20$739
This Delta deal was found by Cheapflights users on 1/19. 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.
Mon 10/59:55 am
BOS
-
SOU
2 stops17h 40m
Delta
Mon 10/199:05 am
SOU
-
BOS
1 stop12h 35m
Delta
Deal found 1/19$744
This KAYAK deal was found by Cheapflights users on 1/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/59:15 pm
BOS
-
SOU
1 stop17h 15m
Aer Lingus
Mon 10/198:00 pm
SOU
-
BOS
1 stop31h 00m
Aer Lingus
Deal found 1/19$798
This Delta deal was found by Cheapflights users on 1/20. 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 10/79:55 am
BOS
-
SOU
2 stops17h 40m
Delta
Mon 10/199:05 am
SOU
-
BOS
2 stops18h 21m
Delta
Deal found 1/20$841
This KAYAK deal was found by Cheapflights users on 1/20. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:25 pm
BOS
-
SOU
1 stop9h 40m
Aer Lingus
Sun 10/189:10 am
SOU
-
BOS
2 stops28h 08m
Aer Lingus
Deal found 1/20$853
This KAYAK deal was found by Cheapflights users on 1/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/511:30 pm
BOS
-
SOU
1 stop15h 00m
Multiple Airlines
Mon 10/1912:35 pm
SOU
-
BOS
2 stops14h 25m
Multiple Airlines
Deal found 1/19$870
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 7/2311:00 pm
BOS
-
SOU
1 stop16h 15m
Multiple Airlines
Tue 8/48:45 pm
SOU
-
BOS
1 stop29h 30m
Multiple Airlines
Deal found 1/20$881
This KAYAK deal was found by Cheapflights users on 1/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/69:15 pm
BOS
-
SOU
1 stop17h 15m
Aer Lingus
Sun 8/169:10 am
SOU
-
BOS
1 stop10h 45m
Aer Lingus
Deal found 1/19$916
This KAYAK deal was found by Cheapflights users on 1/19. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/79:20 pm
BOS
-
SOU
1 stop30h 25m
Aer Lingus
Sun 3/228:10 pm
SOU
-
BOS
1 stop27h 45m
Aer Lingus
Deal found 1/19$924

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 January 21, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$750
(Delta)

One-way from

$500
(KAYAK)

Popular in

June

Cheapest in

October

Average price

$565
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 ($100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 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 January 21, 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 5/13

8:25 pm-8:35 am

1 stop31h 10m

Southampton Eastleigh

Fri 5/22

9:05 am-6:30 pm

1 stop14h 25m

$750

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 5/14

9:55 am-8:35 am

2 stops17h 40m

Southampton Eastleigh

Fri 5/22

9:05 am-6:30 pm

1 stop14h 25m

$812

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 5/13

8:25 pm-4:50 pm

1 stop15h 25m

Southampton Eastleigh

Sat 5/23

5:20 pm-1:10 pm

1 stop24h 50m

$939

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 3/15

6:10 pm-8:45 am

1 stop10h 35m

Southampton Eastleigh

Wed 3/18

4:05 pm-7:55 pm

1 stop31h 50m

$959

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 7/4

4:40 pm-8:45 am

1 stop11h 05m

Southampton Eastleigh

Tue 7/14

6:05 pm-4:40 pm

1 stop27h 35m

$979

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 7/4

7:30 am-8:45 am

2 stops20h 15m

Southampton Eastleigh

Thu 7/16

9:15 am-4:40 pm

1 stop12h 25m

$983

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 3/1

7:10 pm-8:20 am

1 stop32h 10m

$371

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 3/3

7:10 pm-8:20 am

1 stop32h 10m

$371

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 3/4

7:10 pm-8:20 am

1 stop32h 10m

$371

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 3/5

10:03 am-5:00 pm

2 stops25h 57m

$375

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/18

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 $561). 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 January 21, 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 January 21, 2026.

The most flights from BOS to P0R are scheduled on a Monday (32 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (22 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 January 21, 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
8,088 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

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
8,088 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

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
1,439 reviews
Delta
7.9
Good
8,088 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Entertainment

7.8

Food

7.2

Comfort

7.9

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 $750, Delta can have you in Portsmouth from Boston in 31h 10m. There are 3228 mi between Boston and Portsmouth.

  • 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: Malaysia Airlines (94%), Gulf Air (88%), American Airlines( 84%).

  • What are the cheapest flights from Boston to Portsmouth?

    While on average a flight from Boston to Portsmouth is generally $1,920, our data shows the cheapest flight currently is $223. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $676 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 $561). 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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Alternative routes for Boston to Portsmouth

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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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$261Average$643FlexibilityNo cancel feeOn-time62%
SWISSCheapest$320Average$622FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$367Average$450FlexibilityNo cancel feeOn-timeN/A
PLAYCheapest$380Average$509FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$393Average$657FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$456Average$581FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$460Average$621FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$466Average$651FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$467Average$819FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$467Average$614FlexibilityNo cancel feeOn-time77%

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