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Portsmouth

$339+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Dec 26 — Jan 21
Fri 12/26
Fri 1/2
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 November 26, 2025.

This Delta deal was found by Cheapflights users on 11/24. 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 12/167:10 pmBOS - SOU
1 stop16h 50mDelta
Wed 1/75:35 pmSOU - BOS
2 stops29h 55mDelta
Deal found 11/24$1,221
This Delta deal was found by Cheapflights users on 11/24. 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 12/189:59 amBOS - SOU
2 stops17h 06mDelta
Wed 1/75:35 pmSOU - BOS
2 stops27h 18mDelta
Deal found 11/24$1,332
This Delta deal was found by Cheapflights users on 11/24. 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 12/167:10 pmBOS - SOU
1 stop16h 50mDelta
Tue 1/65:35 pmSOU - BOS
1 stop24h 55mDelta
Deal found 11/24$1,381
This KLM deal was found by Cheapflights users on 11/24. 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.
Mon 12/228:50 pmBOS - SOU
1 stop30h 20mKLM
Mon 12/296:05 pmSOU - BOS
1 stop24h 15mKLM
Deal found 11/24$1,469
This Kiwi.com deal was found by Cheapflights users on 11/24. 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.
Mon 12/228:08 amBOS - SOU
2 stops30h 32mMultiple Airlines
Mon 12/297:55 pmSOU - BOS
1 stop30h 00mMultiple Airlines
Deal found 11/24$1,528
This Delta deal was found by Cheapflights users on 11/25. 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.
Mon 12/227:10 pmBOS - SOU
1 stop16h 50mDelta
Fri 6/269:05 amSOU - BOS
1 stop12h 25mDelta
Deal found 11/25$1,615
This Delta deal was found by Cheapflights users on 11/25. 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.
Mon 12/227:10 pmBOS - SOU
1 stop16h 50mDelta
Sat 6/279:15 amSOU - BOS
1 stop12h 15mDelta
Deal found 11/25$1,685
This FlightHub deal was found by Cheapflights users on 11/24. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:07 pmBOS - SOU
2 stops34h 48mAer Lingus
Mon 12/299:30 amSOU - BOS
2 stops29h 27mAer Lingus
Deal found 11/24$1,760
This KAYAK deal was found by Cheapflights users on 11/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/235:20 pmBOS - SOU
1 stop13h 35mAer Lingus
Tue 12/3012:25 pmSOU - BOS
1 stop11h 30mAer Lingus
Deal found 11/26$1,769

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 November 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$593
(Mytrip)

One-way from

$339
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$584
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.
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. 14% potential increase in price ($104 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in November 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 November 26, 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

Fri 1/9

5:10 pm-8:45 am

1 stop10h 35m

Southampton Eastleigh

Fri 1/16

9:30 am-6:59 pm

1 stop14h 29m

$593

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 3/10

8:10 pm-8:20 am

1 stop32h 10m

Southampton Eastleigh

Mon 3/16

5:30 pm-2:20 pm

1 stop24h 50m

$670

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 3/9

9:50 pm-5:00 pm

1 stop15h 10m

Southampton Eastleigh

Tue 3/17

5:30 pm-2:20 pm

1 stop24h 50m

$670

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 3/10

8:10 pm-8:20 am

1 stop32h 10m

Southampton Eastleigh

Tue 3/17

5:30 pm-7:55 pm

1 stop30h 25m

$670

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 3/8

9:50 pm-8:10 am

1 stop30h 20m

Southampton Eastleigh

Tue 3/17

5:30 pm-7:55 pm

1 stop30h 25m

$670

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 3/11

9:50 pm-5:25 pm

1 stop15h 35m

Southampton Eastleigh

Tue 3/17

5:30 pm-7:55 pm

1 stop30h 25m

$670

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 3/11

9:50 pm-5:25 pm

1 stop15h 35m

Southampton Eastleigh

Mon 3/16

5:30 pm-2:20 pm

1 stop24h 50m

$670

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 3/8

6:00 am-8:20 am

2 stops22h 20m

Southampton Eastleigh

Mon 3/16

5:30 pm-2:20 pm

1 stop24h 50m

$674

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sat 5/9

11:30 pm-12:25 pm

2 stops31h 55m

$339

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 1/4

10:45 pm-2:50 pm

2 stops35h 05m

$428

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/25

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 November 26, 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 November 26, 2025.

The most flights from BOS to P0R are scheduled on a Monday (27 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (21 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 November 26, 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
8,004 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

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
8,004 reviews
Delta
7.9
Good
8,004 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

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
1,382 reviews
Delta
7.9
Good
8,004 reviews

Food

7.3

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.9

Overall

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 $593, 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: Air France (87%), Malaysia Airlines (87%), KLM( 87%).

  • What are the cheapest flights from Boston to Portsmouth?

    While on average a flight from Boston to Portsmouth is generally $1,938, our data shows the cheapest flight currently is $174. When looking at the most popular route, (Boston Logan Intl - Southampton Eastleigh), you can expect to pay $724 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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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 November 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$293Average$626FlexibilityNo cancel feeOn-time79%
JetBlueCheapest$320Average$649FlexibilityNo cancel feeOn-time62%
TAP AIR PORTUGALCheapest$367Average$450FlexibilityNo cancel feeOn-timeN/A
PLAYCheapest$380Average$582FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$387Average$598FlexibilityNo cancel feeOn-time75%
Scandinavian AirlinesCheapest$393Average$657FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$401Average$617FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$404Average$656FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$405Average$608FlexibilityNo cancel feeOn-time70%
Air CanadaCheapest$418Average$629FlexibilityNo cancel feeOn-time67%

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