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Portsmouth

$599+ 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 6/13. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Jan 22 — Jan 291
Thu 1/22
Thu 1/29
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 December 23, 2025.

This Delta deal was found by Cheapflights users on 12/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:15 pmBOS - SOU
2 stops18h 45mDelta
Tue 12/305:30 pmSOU - BOS
1 stop24h 50mDelta
Deal found 12/22$1,135
This British Airways deal was found by Cheapflights users on 12/20. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/255:20 pmBOS - SOU
1 stop10h 25mBritish Airways
Tue 12/3012:40 pmSOU - BOS
2 stops14h 15mBritish Airways
Deal found 12/20$4,140

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 December 23, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$608
(Mytrip)

One-way from

$541
(KAYAK)

Popular in

June

Cheapest in

October

Average price

$735
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. 13% potential increase in price ($100 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
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Average for round-trip flights in December 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 December 23, 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 2/5

9:15 pm-7:40 pm

1 stop17h 25m

Southampton Eastleigh

Thu 2/12

9:30 am-6:59 pm

1 stop14h 29m

$608

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 2/4

8:50 pm-8:25 am

1 stop30h 35m

Southampton Eastleigh

Wed 2/11

5:35 pm-1:25 pm

1 stop24h 50m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 2/5

9:15 pm-8:45 am

2 stops30h 30m

Southampton Eastleigh

Thu 2/12

9:30 am-6:59 pm

1 stop14h 29m

$687

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 2/28

11:50 am-8:50 am

2 stops16h 00m

Southampton Eastleigh

Mon 3/9

5:35 pm-2:20 pm

1 stop24h 45m

$726

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 2/6

6:00 am-8:45 am

2 stops21h 45m

Southampton Eastleigh

Fri 2/13

9:00 am-6:55 pm

1 stop14h 55m

$726

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 2/5

1:00 pm-8:25 am

2 stops14h 25m

Southampton Eastleigh

Thu 2/12

9:00 am-11:26 pm

2 stops19h 26m

$728

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 2/28

11:50 am-8:50 am

2 stops16h 00m

Southampton Eastleigh

Fri 3/6

5:35 pm-1:20 pm

1 stop24h 45m

$776

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 2/28

11:50 am-8:50 am

2 stops16h 00m

Southampton Eastleigh

Sat 3/7

5:30 pm-1:20 pm

1 stop24h 50m

$776

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 6/13

9:25 pm-8:40 am

1 stop30h 15m

$599

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 6/14

9:25 pm-8:40 am

1 stop30h 15m

$753

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 12 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 December 23, 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.

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 December 23, 2025.

The most flights from BOS to P0R are scheduled on a Wednesday (30 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (26 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 December 23, 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
8,015 reviews

Entertainment

7.9

Crew

8.5

Overall

7.9

Food

7.3

Boarding

8.1

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
8,015 reviews
Delta
7.9
Good
8,015 reviews

Entertainment

7.9

Crew

8.5

Overall

7.9

Food

7.3

Boarding

8.1

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
1,412 reviews
Delta
7.9
Good
8,015 reviews

Entertainment

7.9

Crew

8.5

Overall

7.9

Food

7.3

Boarding

8.1

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 $608, Aer Lingus can have you in Portsmouth from Boston in 17h 25m. 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: KLM (90%), Malaysia Airlines (90%), Air France( 89%).

  • What are the cheapest flights from Boston to Portsmouth?

    While on average a flight from Boston to Portsmouth is generally $1,942, our data shows the cheapest flight currently is $201. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $608 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 December 23, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$318Average$644FlexibilityNo cancel feeOn-time62%
SWISSCheapest$320Average$623FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$367Average$450FlexibilityNo cancel feeOn-timeN/A
PLAYCheapest$382Average$645FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$393Average$610FlexibilityNo cancel feeOn-time67%
Scandinavian AirlinesCheapest$393Average$657FlexibilityNo cancel feeOn-time77%
KLMCheapest$402Average$625FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$458Average$631FlexibilityNo cancel feeOn-time71%
IcelandairCheapest$459Average$580FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$465Average$618FlexibilityNo cancel feeOn-time77%

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