HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$310+ 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Boston to Portsmouth with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 18, 2025.

This KLM deal was found by Cheapflights users on 12/16. 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 12/218:50 pmBOS - SOU
1 stop30h 20mKLM
Tue 1/209:25 amSOU - BOS
1 stop33h 05mKLM
Deal found 12/16$1,225
This British Airways deal was found by Cheapflights users on 12/15. 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 12/15$3,120
This British Airways deal was found by Cheapflights users on 12/14. 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.
Sat 12/206:55 pmBOS - SOU
2 stops12h 30mBritish Airways
Sun 1/119:30 amSOU - BOS
1 stop14h 29mBritish Airways
Deal found 12/14$4,322

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 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$650
(Kiwi.com)

One-way from

$310
(Delta)

Popular in

June

Cheapest in

October

Average price

$734
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. 13% potential increase in price ($99 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 December 2025
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 December 18, 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

Mon 1/26

5:10 pm-11:55 am

1 stop13h 45m

Southampton Eastleigh

Mon 2/2

7:55 pm-8:55 pm

1 stop30h 00m

$650

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 2/4

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Mon 3/16

5:35 pm-2:20 pm

1 stop24h 45m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

7:10 pm-5:05 pm

1 stop16h 55m

Southampton Eastleigh

Tue 3/17

5:35 pm-2:20 pm

1 stop24h 45m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 2/2

7:10 pm-5:05 pm

1 stop16h 55m

Southampton Eastleigh

Tue 3/17

5:35 pm-7:55 pm

1 stop30h 20m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 2/4

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Tue 3/17

5:35 pm-7:55 pm

1 stop30h 20m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 2/4

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Wed 3/18

5:35 pm-2:20 pm

1 stop24h 45m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 2/2

7:10 pm-5:05 pm

1 stop16h 55m

Southampton Eastleigh

Fri 3/20

8:40 am-7:55 pm

1 stop15h 15m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Fri 3/20

8:40 am-7:55 pm

1 stop15h 15m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

7:10 pm-5:05 pm

1 stop16h 55m

Southampton Eastleigh

Wed 3/18

8:40 am-7:55 pm

1 stop15h 15m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

10:05 am-8:50 am

2 stops17h 45m

Southampton Eastleigh

Mon 3/16

5:35 pm-2:20 pm

1 stop24h 45m

$676

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 19 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 18, 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 18, 2025.

The most flights from BOS to P0R are scheduled on a Wednesday (36 on average). You will have fewer flight options on Saturday, 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 18, 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
8,005 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

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
8,005 reviews
Delta
7.9
Good
8,005 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

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
1,395 reviews
Delta
7.9
Good
8,005 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Crew

8.5

Overall

7.9

Boarding

8.1

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 $672, Delta can have you in Portsmouth from Boston in 15h 15m. 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: 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 $1,945, 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 $672 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boston to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
Boston to Heathrow flights
Boston to Gatwick flights
Boston to London City flights
Boston to Stansted flights
Boston to Luton flights
Boston to Edinburgh flights
Boston to Manchester flights
Hartford to Heathrow flights
Boston to Southend flights
Hartford to Gatwick flights
Hartford to London City flights
Albany to Heathrow flights
Boston to Leeds flights
Albany to London City flights
Boston to Birmingham flights
Hartford to Edinburgh flights
Boston to Liverpool flights
Hartford to Manchester flights
Hartford to Stansted flights
Boston to Southampton flights
Boston to Bristol flights
Albany to Gatwick flights
Albany to Edinburgh flights
Boston to Newcastle upon Tyne flights
Hartford to Birmingham flights
Boston to East Midlands flights
Worcester to Edinburgh flights
West Tisbury to Heathrow flights
Hartford to Luton flights
Boston to Newquay flights
Hartford to Liverpool flights
Albany to Manchester flights
Hartford to Southampton flights
Hartford to Leeds flights
Hartford to Bristol flights
Albany to Birmingham flights
Worcester to London City flights

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 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$320Average$643FlexibilityNo 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
Scandinavian AirlinesCheapest$393Average$657FlexibilityNo cancel feeOn-time77%
KLMCheapest$401Average$624FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$412Average$596FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$434Average$618FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$456Average$580FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$458Average$629FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.