How long is the flight from Boston to Portsmouth?

For as low as $674, KLM can have you in Portsmouth from Boston in 15h 15m. There are 3228 mi between Boston and Portsmouth. Both multi-stop and nonstop flights can be found to your destination and back.

In terms of precipitation, rainfall in Portsmouth ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Portsmouth when rainfall is around 1.0 in.

If weather is an important factor for your trip to Portsmouth, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

What are the cheapest flights from Boston to Portsmouth?

While on average a flight from Boston to Portsmouth is generally $1,948, our data shows the cheapest flight currently is $214. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $674 for that flight.

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 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.

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.

$651+ Flights from Boston to Portsmouth

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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 30, 2025.

Sun 12/289:35 pmBOS - SOU

2 stops15h 00mBritish Airways

Sat 1/1010:15 amSOU - BOS

2 stops16h 40mBritish Airways

Deal found 12/27

$4,528

Best flights from Boston to Portsmouth
Discover carefully curated flight deals from Boston to Portsmouth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 30, 2025.

Mon 1/265:10 pmBOS - SOU

1 stop13h 45mMultiple Airlines

Mon 2/27:55 pmSOU - BOS

1 stop30h 00mMultiple Airlines

Deal found 12/29

$651

Wed 2/118:50 pmBOS - SOU

1 stop15h 15mKLM

Wed 2/189:25 amSOU - BOS

1 stop14h 30mKLM

Deal found 12/28

$674

Wed 1/288:50 pmBOS - SOU

1 stop30h 35mDelta

Mon 2/25:35 pmSOU - BOS

1 stop24h 50mDelta

Deal found 12/27

$674

Wed 2/118:50 pmBOS - SOU

1 stop15h 15mVirgin Atlantic

Wed 2/189:25 amSOU - BOS

1 stop14h 30mVirgin Atlantic

Deal found 12/28

$674

Wed 3/189:50 pmBOS - SOU

1 stop15h 35mKLM

Tue 3/245:35 pmSOU - BOS

1 stop24h 45mKLM

Deal found 12/28

$674

Mon 1/2611:12 amBOS - SOU

2 stops16h 38mDelta

Mon 2/25:35 pmSOU - BOS

1 stop24h 50mDelta

Deal found 12/29

$678

Fri 2/208:50 pmBOS - SOU

1 stop31h 00mDelta

Thu 2/266:05 pmSOU - BOS

1 stop24h 20mDelta

Deal found 12/29

$724

Fri 2/204:58 pmBOS - SOU

2 stops19h 02mDelta

Fri 2/278:50 amSOU - BOS

1 stop15h 05mDelta

Deal found 12/29

$728

Thu 2/191:04 pmBOS - SOU

2 stops14h 21mDelta

Fri 2/278:50 amSOU - BOS

1 stop15h 05mDelta

Deal found 12/29

$728

Last-minute flights from Boston to Portsmouth
Discover last-minute flight deals from Boston to Portsmouth. Data last updated December 30, 2025 and is based on user searches.

Mon 1/265:10 pmBOS - SOU

1 stop13h 45mMultiple Airlines

Mon 2/27:55 pmSOU - BOS

1 stop30h 00mMultiple Airlines

Deal found 12/29

$651

Mon 1/261:00 pmBOS - SOU

2 stops14h 50mKLM

Mon 2/29:25 amSOU - BOS

1 stop33h 00mKLM

Deal found 12/29

$678

Mon 1/2610:41 amBOS - SOU

2 stops20h 14mAer Lingus

Mon 2/28:10 pmSOU - BOS

2 stops26h 03mAer Lingus

Deal found 12/29

$859

Mon 1/265:10 pmBOS - SOU

1 stop13h 45mAer Lingus

Sat 2/79:30 amSOU - BOS

1 stop14h 29mAer Lingus

Deal found 12/29

$907

Mon 1/269:35 pmBOS - SOU

2 stops14h 55mBritish Airways

Sat 2/79:30 amSOU - BOS

1 stop14h 29mBritish Airways

Deal found 12/29

$4,054

Wed 1/288:50 pmBOS - SOU

1 stop30h 35mDelta

Mon 2/25:35 pmSOU - BOS

1 stop24h 50mDelta

Deal found 12/27

$674

Wed 1/288:50 pmBOS - SOU

1 stop15h 15mDelta

Sat 1/319:25 amSOU - BOS

2 stops19h 26mDelta

Deal found 12/27

$813

Thu 1/291:00 pmBOS - SOU

2 stops14h 25mDelta

Mon 2/29:25 amSOU - BOS

2 stops17h 57mDelta

Deal found 12/27

$788

Find flight deals from Boston to Portsmouth

Most accurate provider	CheapOair 3 stars
Most trusted provider	CheapOair 3 stars
Round-trip from	$651 (Kiwi.com)
Popular in	June
Cheapest in	October
Average price	$740

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. 13% potential increase in price ($100 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

Fly from

Fly to

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

$651

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 2/11

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Wed 2/18

9:25 am-6:55 pm

1 stop14h 30m

$674

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 1/28

8:50 pm-8:25 am

1 stop30h 35m

Southampton Eastleigh

Mon 2/2

5:35 pm-1:25 pm

1 stop24h 50m

$674

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 2/11

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Wed 2/18

9:25 am-6:55 pm

1 stop14h 30m

$674

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 3/18

9:50 pm-5:25 pm

1 stop15h 35m

Southampton Eastleigh

Tue 3/24

5:35 pm-2:20 pm

1 stop24h 45m

$674

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 1/26

11:12 am-8:50 am

2 stops16h 38m

Southampton Eastleigh

Mon 2/2

5:35 pm-1:25 pm

1 stop24h 50m

$678

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 2/20

8:50 pm-8:50 am

1 stop31h 00m

Southampton Eastleigh

Thu 2/26

6:05 pm-1:25 pm

1 stop24h 20m

$724

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 2/20

4:58 pm-5:00 pm

2 stops19h 02m

Southampton Eastleigh

Fri 2/27

8:50 am-6:55 pm

1 stop15h 05m

$728

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 2/19

1:04 pm-8:25 am

2 stops14h 21m

Southampton Eastleigh

Fri 2/27

8:50 am-6:55 pm

1 stop15h 05m

$728

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/29

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?

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 (36 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (18 on average).

Reviews of airlines servicing Portsmouth

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

8,016 reviews

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

8,016 reviews

Delta

7.9

Good

8,016 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Aer Lingus

7.2

Good

1,415 reviews

Delta

7.9

Good

8,016 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

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 18 different airlines.
How long is the flight from Boston to Portsmouth?
For as low as $674, KLM can have you in Portsmouth from Boston in 15h 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: 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 $1,948, our data shows the cheapest flight currently is $214. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $674 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

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Complete your trip

Portsmouth car rentals

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Top 10 airlines flying from Boston to Portsmouth

Airline	Cheapest	Average	Flexibility	On-time
JetBlue	Cheapest$310	Average$643	FlexibilityNo cancel fee	On-time62%
SWISS	Cheapest$320	Average$623	FlexibilityNo cancel fee	On-time79%
TAP AIR PORTUGAL	Cheapest$367	Average$450	FlexibilityNo cancel fee	On-timeN/A
PLAY	Cheapest$382	Average$648	FlexibilityNo cancel fee	On-timeN/A
Scandinavian Airlines	Cheapest$393	Average$657	FlexibilityNo cancel fee	On-time77%
KLM	Cheapest$416	Average$626	FlexibilityNo cancel fee	On-time75%
Icelandair	Cheapest$458	Average$580	FlexibilityNo cancel fee	On-time76%
American Airlines	Cheapest$459	Average$631	FlexibilityNo cancel fee	On-time71%
Lufthansa	Cheapest$466	Average$651	FlexibilityNo cancel fee	On-time76%
Finnair	Cheapest$466	Average$622	FlexibilityNo cancel fee	On-time76%

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$651+ Cheap flights from Boston (BOS) to Portsmouth, England

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Boston to Portsmouth with Cheapflights

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Cheap flight deals from Boston to Portsmouth

Cheapest flights from Boston to PortsmouthExplore 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 30, 2025.

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 30, 2025.

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 30, 2025.

Most accurate provider

Most trusted provider

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Boston to Portsmouth that are best for you.

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.

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?

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 30, 2025.

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 30, 2025.

Reviews of airlines servicing Portsmouth

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.

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?

How long is the flight from Boston to Portsmouth?

What are the most reliable airlines from Boston to Portsmouth?

What are the cheapest flights from Boston to Portsmouth?

Can I find deals for flights from Boston to Portsmouth that include hotel bookings?

How can I find direct flights from Boston to Portsmouth?

Can I find deals for business class flights from Boston to Portsmouth?

What is the cheapest month to book a flight from Boston to Portsmouth?

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

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Top 10 airlines flying from Boston to Portsmouth

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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 30, 2025.