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Portsmouth

$580+ 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/28. 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 12/410:40 pmBOS - SOU
1 stop15h 40mMultiple Airlines
Sat 12/139:30 amSOU - BOS
2 stops16h 25mMultiple Airlines
Deal found 10/28$635
This Expedia deal was found by Cheapflights users on 10/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/45:10 pmBOS - SOU
1 stop10h 35mAer Lingus
Sat 12/139:30 amSOU - BOS
1 stop14h 25mAer Lingus
Deal found 10/28$667
This Delta deal was found by Cheapflights users on 10/29. 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 11/58:50 pmBOS - SOU
1 stop15h 35mDelta
Sun 11/96:05 pmSOU - BOS
1 stop24h 15mDelta
Deal found 10/29$715
This KLM deal was found by Cheapflights users on 10/29. 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.
Sun 12/78:50 pmBOS - SOU
1 stop15h 35mKLM
Sun 12/149:30 amSOU - BOS
1 stop14h 25mKLM
Deal found 10/29$767
This Delta deal was found by Cheapflights users on 10/29. 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 11/49:00 amBOS - SOU
2 stops27h 00mDelta
Sun 11/96:05 pmSOU - BOS
1 stop24h 15mDelta
Deal found 10/29$769
This Delta deal was found by Cheapflights users on 10/28. 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 12/45:40 amBOS - SOU
2 stops21h 25mDelta
Sat 12/139:25 amSOU - BOS
2 stops14h 49mDelta
Deal found 10/28$780
This Air France deal was found by Cheapflights users on 10/28. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:50 pmBOS - SOU
1 stop15h 35mKLM
Sat 12/69:25 amSOU - BOS
1 stop32h 55mKLM
Deal found 10/28$794

Cheap flight deals from Boston to Portsmouth

Keep the following information in mind while searching for Boston to Portsmouth flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$635
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$545
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
Highest demand for flights based on searches. 14% potential increase in price ($107 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 October 2025
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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 October 30, 2025.
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

Thu 12/4

10:40 pm-7:20 pm

1 stop15h 40m

Southampton Eastleigh

Sat 12/13

9:30 am-8:55 pm

2 stops16h 25m

$635

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 12/4

5:10 pm-8:45 am

1 stop10h 35m

Southampton Eastleigh

Sat 12/13

9:30 am-6:55 pm

1 stop14h 25m

$667

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 12/7

8:50 pm-5:25 pm

1 stop15h 35m

Southampton Eastleigh

Sun 12/14

9:30 am-6:55 pm

1 stop14h 25m

$767

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 12/4

5:40 am-8:05 am

2 stops21h 25m

Southampton Eastleigh

Sat 12/13

9:25 am-7:14 pm

2 stops14h 49m

$780

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 12/3

8:50 pm-5:25 pm

1 stop15h 35m

Southampton Eastleigh

Sat 12/6

9:25 am-1:20 pm

1 stop32h 55m

$794

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 3/29

4:45 pm-8:50 am

1 stop11h 05m

Southampton Eastleigh

Wed 4/1

9:20 am-4:30 pm

1 stop12h 10m

$818

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 12/30

9:20 pm-3:35 pm

1 stop13h 15m

$580

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 12/24

7:05 pm-8:05 am

1 stop32h 00m

$656

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 12/27

5:20 pm-3:35 pm

1 stop17h 15m

$671

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 12/22

7:25 pm-8:10 am

2 stops31h 45m

$677

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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 October 30, 2025.

One of the essential ways to save on airfare from Boston to Portsmouth is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 23% on airfare.

What is the cheapest day to fly from Boston to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from Boston to Portsmouth. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Boston to Portsmouth flight should consider departing on Tuesday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 30, 2025.
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
7,996 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,996 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Aer Lingus
7.2
Good
1,363 reviews
Delta
7.9
Good
7,996 reviews

Crew

8.5

Boarding

8.2

Comfort

7.9

Entertainment

7.9

Food

7.3

Overall

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 $667, Aer Lingus can have you in Portsmouth from Boston in 10h 35m. 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 (90%), Air France (90%), KLM( 89%).

  • What are the cheapest flights from Boston to Portsmouth?

    While on average a flight from Boston to Portsmouth is generally $1,765, our data shows the cheapest flight currently is $196. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $635 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.

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$290Average$622FlexibilityNo cancel feeOn-time79%
JetBlueCheapest$333Average$648FlexibilityNo cancel feeOn-time62%
TAP AIR PORTUGALCheapest$367Average$450FlexibilityNo cancel feeOn-timeN/A
PLAYCheapest$380Average$582FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$387Average$582FlexibilityNo cancel feeOn-time75%
Air FranceCheapest$391Average$611FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$393Average$640FlexibilityNo cancel feeOn-time70%
Scandinavian AirlinesCheapest$393Average$657FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$399Average$649FlexibilityNo cancel feeOn-time72%
DeltaCheapest$401Average$920FlexibilityNo cancel feeOn-timeN/A

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