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Portsmouth

$349+ 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 5/18. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
May 24 — May 311
Sun 5/24
Sun 5/31
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 April 24, 2026.

This Mytrip deal was found by Cheapflights users on 4/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:50 am
BOS
-
SOU
3 stops32h 40m
Multiple Airlines
Wed 6/103:35 pm
SOU
-
BOS
2 stops23h 10m
Multiple Airlines
Deal found 4/19$912
This Kiwi.com deal was found by Cheapflights users on 4/23. 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.
Sun 9/611:50 pm
BOS
-
SOU
1 stop14h 00m
Multiple Airlines
Mon 9/147:20 pm
SOU
-
BOS
2 stops30h 00m
Multiple Airlines
Deal found 4/23$925
This Kiwi.com deal was found by Cheapflights users on 4/20. 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.
Sat 8/15:25 pm
BOS
-
SOU
1 stop10h 10m
Multiple Airlines
Thu 8/276:50 am
SOU
-
BOS
2 stops19h 25m
Multiple Airlines
Deal found 4/20$965
This Kiwi.com deal was found by Cheapflights users on 4/22. 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.
Tue 8/45:25 pm
BOS
-
SOU
1 stop9h 40m
Multiple Airlines
Tue 8/188:00 pm
SOU
-
BOS
2 stops28h 41m
Multiple Airlines
Deal found 4/22$974
This Mytrip deal was found by Cheapflights users on 4/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/111:00 pm
BOS
-
SOU
2 stops15h 30m
Multiple Airlines
Fri 5/86:25 pm
SOU
-
BOS
3 stops32h 20m
Multiple Airlines
Deal found 4/20$992
This Kiwi.com deal was found by Cheapflights users on 4/22. 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 8/59:15 pm
BOS
-
SOU
1 stop17h 15m
Multiple Airlines
Sun 8/168:00 pm
SOU
-
BOS
2 stops28h 41m
Multiple Airlines
Deal found 4/22$1,012
This Mytrip deal was found by Cheapflights users on 4/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2010:35 am
BOS
-
SOU
2 stops27h 55m
Multiple Airlines
Wed 5/273:35 pm
SOU
-
BOS
2 stops23h 10m
Multiple Airlines
Deal found 4/20$1,016
This Kiwi.com deal was found by Cheapflights users on 4/21. 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 6/511:35 pm
BOS
-
SOU
1 stop28h 00m
Multiple Airlines
Fri 6/128:00 pm
SOU
-
BOS
2 stops42h 05m
Multiple Airlines
Deal found 4/21$1,019

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 April 24, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$912
(Mytrip)

One-way from

$349
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$628
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. 16% potential increase in price ($115 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 April 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 April 24, 2026.
Use the filters below to find and compare flights from Boston to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 6/3

5:50 am-7:30 pm

3 stops32h 40m

Southampton Eastleigh

Wed 6/10

3:35 pm-10:31 am

3 stops23h 56m

$920

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 6/5

11:35 pm-8:35 am

1 stop28h 00m

Southampton Eastleigh

Fri 6/12

8:00 pm-9:05 am

2 stops42h 05m

$1,019
Quickest round-trip

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 5/24

5:25 pm-8:40 am

1 stop10h 15m

Southampton Eastleigh

Thu 6/4

9:20 am-6:50 pm

1 stop14h 30m

$1,029

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 5/1

11:11 am-8:45 am

2 stops16h 34m

Southampton Eastleigh

Fri 5/8

9:05 am-6:30 pm

1 stop14h 25m

$1,046

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 5/24

12:30 pm-6:50 pm

2 stops25h 20m

Southampton Eastleigh

Thu 6/4

9:20 am-2:45 pm

2 stops34h 25m

$1,060

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 5/1

8:50 pm-7:25 pm

3 stops17h 35m

Southampton Eastleigh

Fri 5/8

5:20 pm-8:20 pm

3 stops32h 00m

$1,209

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 6/4

8:25 pm-4:50 pm

1 stop15h 25m

Southampton Eastleigh

Mon 6/8

5:20 pm-4:35 pm

1 stop28h 15m

$1,285

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 6/5

1:29 pm-8:45 am

2 stops14h 16m

Southampton Eastleigh

Mon 6/8

5:20 pm-1:05 pm

1 stop24h 45m

$1,289

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 6/5

1:29 pm-8:45 am

2 stops14h 16m

Southampton Eastleigh

Tue 6/9

9:05 am-4:35 pm

1 stop12h 30m

$1,289
Cheapest one-way

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 5/18

8:50 pm-7:00 pm

3 stops41h 10m

$349

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 20 resultsSorted by cheapest first
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 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 April 24, 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 April 24, 2026.

The most flights from BOS to P0R are scheduled on a Monday (31 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (20 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 April 24, 2026.
See what other customers who have flown with 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.
Aer Lingus
7.3
Good
1,528 reviews

Overall

7.3

Comfort

7.2

Food

6.6

Boarding

7.4

Crew

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

SFO - DUB

The boarding went smoothly, the crew were great and helped me with an extra pillow, the food was good including complementary wine with dinner (economy seating), and I was able to sleep. The flight arrived early which helped with connections. Overall a great experience.
Aer Lingus
7.3
Good
1,528 reviews
Aer Lingus
7.3
Good
1,528 reviews

Overall

7.3

Comfort

7.2

Food

6.6

Boarding

7.4

Crew

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Anonymous,Jan 2026

SFO - DUB

The boarding went smoothly, the crew were great and helped me with an extra pillow, the food was good including complementary wine with dinner (economy seating), and I was able to sleep. The flight arrived early which helped with connections. Overall a great experience.

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 16 different airlines.

  • How long is the flight from Boston to Portsmouth?

    For as low as $1,029, Aer Lingus can have you in Portsmouth from Boston in 10h 15m. 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: Scandinavian Airlines (95%), KLM (93%), Delta( 91%).

  • What are the cheapest flights from Boston to Portsmouth?

    While on average a flight from Boston to Portsmouth is generally $2,029, our data shows the cheapest flight currently is $294. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $974 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.

See more FAQs

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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 April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$262Average$613FlexibilityNo cancel feeOn-time62%
TAP AIR PORTUGALCheapest$411Average$478FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$423Average$754FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$441Average$582FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$460Average$643FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$463Average$779FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$465Average$575FlexibilityNo cancel feeOn-time70%
LufthansaCheapest$466Average$666FlexibilityNo cancel feeOn-time76%
FinnairCheapest$466Average$633FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$471Average$707FlexibilityNo cancel feeOn-time72%

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