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Portsmouth

$374+ Cheap flights from Boston (BOS) to Portsmouth, England

BOS — LHR
Sep 20 — Sep 271
Sun 9/20
Sun 9/27
1 adult, Economy
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Cheap flight deals from Boston to Portsmouth

Cheapest flights from Boston to Portsmouth

Mon 10/55:25 pm -
1 stop10h 15m
Tue 10/201:25 pm -
2 stops36h 40m
Deal found 8/19$685
Fri 10/168:50 pm -
2 stops17h 05m
Sun 11/19:20 am -
1 stop14h 35m
Deal found 8/21$698
Fri 10/169:15 pm -
1 stop17h 15m
Sun 11/19:20 am -
1 stop14h 35m
Deal found 8/21$729
Mon 10/59:15 pm -
1 stop17h 15m
Tue 10/209:15 am -
1 stop14h 35m
Deal found 8/20$813
Mon 9/143:35 pm -
2 stops22h 55m
Mon 9/218:00 pm -
2 stops27h 07m
Deal found 8/17$858

Find flight deals from Boston to Portsmouth

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$685
(Kiwi.com)

One-way from

$374
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$760
Provider with most accurate pricing for Boston Logan Intl-London (LON) flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-London (LON) flights.
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From Boston Logan Intl to Portsmouth
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One-way flight from Boston Logan Intl to Portsmouth
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Highest demand for flights based on searches. 20% potential increase in price ($184 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in August 2026
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Cheapflights Fare Finder

 
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 Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Mon 9/14

3:35 pm-7:30 pm

2 stops22h 55m

Southampton Eastleigh

Mon 9/21

8:00 pm-6:07 pm

2 stops27h 07m

$858

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Mon 9/14

5:25 pm-8:40 am

1 stop10h 15m

Southampton Eastleigh

Mon 9/21

9:20 am-6:50 pm

1 stop14h 30m

$1,119

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Sun 11/8

8:55 pm-5:00 pm

1 stop15h 05m

Southampton Eastleigh

Thu 11/26

5:30 pm-2:13 pm

1 stop25h 43m

$1,120

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Tue 10/6

1:00 pm-8:05 am

2 stops14h 05m

Southampton Eastleigh

Sun 10/18

9:20 am-2:55 pm

1 stop10h 35m

$1,125

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Fri 11/6

8:55 pm-5:00 pm

1 stop15h 05m

Southampton Eastleigh

Thu 11/26

8:40 am-2:13 pm

1 stop10h 33m

$1,170
Quickest round-trip

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Tue 9/8

4:40 pm-8:45 am

1 stop11h 05m

Southampton Eastleigh

Wed 9/16

9:15 am-4:35 pm

1 stop12h 20m

$1,172

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Tue 9/8

4:40 pm-8:45 am

1 stop11h 05m

Southampton Eastleigh

Fri 9/18

9:05 am-4:35 pm

1 stop12h 30m

$1,172

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Wed 9/9

8:25 pm-4:50 pm

1 stop15h 25m

Southampton Eastleigh

Fri 9/18

9:05 am-4:35 pm

1 stop12h 30m

$1,172

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Tue 10/6

12:10 pm-8:45 am

2 stops15h 35m

Southampton Eastleigh

Sun 10/18

9:15 am-11:08 pm

2 stops18h 53m

$1,213
Cheapest one-way

BostonSouthampton

BOS Boston Logan Intl - SOU Southampton Eastleigh

BOSSOU

Boston Logan Intl

Thu 9/24

9:15 pm-9:25 am

2 stops55h 10m

$403

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/20

Showing 1-10 of 14 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

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?

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

The most flights from BOS to P0R are scheduled on a Wednesday (39 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (27 on average).

Reviews of airlines servicing Portsmouth

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
1,713 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.5

Food

6.7

Comfort

7.2

Overall

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

BOS - SNN

Seats were very uncomfortable and mine was falling apart. My entertainment system didn’t work at all, just a black screen. It was hot in the plane, the airflow alternated between room temperature and warm. The food was gross.
Aer Lingus
7.3
Good
1,713 reviews
Aer Lingus
7.3
Good
1,713 reviews

Crew

8.1

Entertainment

7.0

Boarding

7.5

Food

6.7

Comfort

7.2

Overall

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

BOS - SNN

Seats were very uncomfortable and mine was falling apart. My entertainment system didn’t work at all, just a black screen. It was hot in the plane, the airflow alternated between room temperature and warm. The food was gross.

Related info for your journey

  • 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 17 different airlines.

  • How long is the flight from Boston to Portsmouth?

    For as low as $1,119, 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: Gulf Air (93%), SAUDIA (82%), JetBlue( 78%).

  • What are the cheapest flights from Boston to Portsmouth?

    While on average a flight from Boston to Portsmouth is generally $2,620, our data shows the cheapest flight currently is $284. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $757 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

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Boston to Portsmouth

AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$352Average$885FlexibilityNo cancel feeOn-time79%
Virgin AtlanticCheapest$417Average$761FlexibilityNo cancel feeOn-time72%
TAP AIR PORTUGALCheapest$425Average$454FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$433Average$748FlexibilityNo cancel feeOn-time62%
IcelandairCheapest$441Average$659FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$463Average$791FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$466Average$703FlexibilityNo cancel feeOn-time76%
FinnairCheapest$470Average$684FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$479Average$742FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$481Average$697FlexibilityNo cancel feeOn-time77%

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