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Cheap flights from Portsmouth to Boston from £491

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOS
11 Jan — 18 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to Boston

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to Boston
Explore the most affordable flight options available from Portsmouth to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 December 2025.

Fri 26/1209:30SOU - BOS
1 stop14h 25mBritish Airways
Thu 1/117:20BOS - SOU
1 stop10h 25mBritish Airways
Deal found 10/12£1,166
Tue 30/1219:55SOU - BOS
2 stops23h 25mBritish Airways
Sun 4/121:20BOS - SOU
1 stop17h 20mBritish Airways
Deal found 10/12£1,811

Find flight deals from Portsmouth to Boston

Keep the following information in mind while searching for Portsmouth to Boston flight deals. Data was last updated 12 December 2025.

Round-trip from

£491

Popular in

December

Cheapest in

September

Average price

£549
Delta
  • Delta
  • 26/3-12/4
  • 2 total stops
  • 41h 25m total
  • Portsmouth to Boston
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£10 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to Boston 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 858,174 searches. Data last updated 12 December 2025.
Use the filters below to find and compare flights from Portsmouth to Boston that are best for you.

Fly from

Portsmouth

Fly to

Boston

Route

Depart

Return

Price

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Thu 26/3

18:05-14:20

1 stop24h 15m

Boston Logan Intl

Sun 12/4

18:40-16:50

1 stop17h 10m

£491

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 27/3

08:40-19:55

1 stop15h 15m

Boston Logan Intl

Sat 11/4

16:45-08:45

1 stop11h 00m

£491

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 27/3

08:40-19:55

1 stop15h 15m

Boston Logan Intl

Sun 12/4

20:25-16:50

1 stop15h 25m

£491

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Mon 30/3

17:20-13:35

1 stop25h 15m

Boston Logan Intl

Sun 12/4

18:40-16:50

1 stop17h 10m

£496

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 29/3

09:15-18:30

1 stop14h 15m

Boston Logan Intl

Sat 11/4

16:45-08:45

1 stop11h 00m

£496

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Mon 30/3

09:05-16:30

1 stop12h 25m

Boston Logan Intl

Sat 11/4

05:25-08:45

2 stops22h 20m

£498

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 29/3

09:15-18:30

1 stop14h 15m

Boston Logan Intl

Sun 12/4

09:05-08:35

2 stops18h 30m

£498

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 25/1

17:45-13:30

1 stop24h 45m

Boston Logan Intl

Sun 1/2

20:50-17:05

1 stop15h 15m

£518

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 25/1

17:45-13:30

1 stop24h 45m

Boston Logan Intl

Sun 1/2

10:05-08:50

2 stops17h 45m

£519

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sat 3/1

09:10-21:55

2 stops17h 45m

£2,022

Flights are sorted by cheapest return flights first.

Deals found on 10/12

Best time to book a flight from Portsmouth to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Portsmouth with our price prediction graph.
Estimated return 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 Portsmouth to Boston

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

Currently, July is the cheapest month in which you can book a flight from Portsmouth to Boston (average of £140). Flying from Portsmouth to Boston in August is currently the most expensive (average of £364). 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 P0R to BOS?

Find hourly flight availability from Portsmouth to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 December 2025.

One of the essential ways to save on airfare from Portsmouth to Boston is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight in the evening could potentially save you up to 26% on airfare.

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

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

Travellers seeking maximum savings on their Portsmouth to Boston flight should consider departing on Thursday mornings when fares are most often at their lowest. Wednesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portsmouth to Boston

Explore weekly flight availability from Portsmouth to Boston. 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 12 December 2025.

The most flights from P0R to BOS are scheduled on a Wednesday (36 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (28 on average).

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to Boston. 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 into for flights to Boston from Portsmouth?

    Most people fly into Boston Logan Intl (BOS) if they book a flight to Boston from Portsmouth. On average, Logan Intl has 0 inbound flights from Portsmouth per day from 17 airlines. Boston Logan Intl is conveniently located just 2.6 mi from Boston’s city center.

  • How long is the flight from Portsmouth to Boston?

    There are many flights that can get you from Portsmouth to Boston in 24h 15m. Fly via Delta to get the fastest option. Portsmouth and Boston are separated by a distance of 3228 mi.

  • What are the most reliable airlines from Portsmouth to Boston?

    The top 3 most reliable airlines when flying from Portsmouth to Boston are Malaysia Airlines (96%), Gulf Air (91%) and Finnair (89%).

  • What are the cheapest flights from Portsmouth to Boston?

    The cheapest flight price from Portsmouth to Boston is £317. On average you can expect to pay £1,370. The most popular route, (Southampton Eastleigh - Boston Logan Intl), can usually be booked for £518.

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

    Yes. In addition to deals on Portsmouth to Boston flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to Boston.

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

    Yes. Cheapflights offers flight deals from Portsmouth to Boston 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 Portsmouth to Boston?

    Currently, July is the cheapest month in which you can book a flight from Portsmouth to Boston (average of £140). Flying from Portsmouth to Boston in August is currently the most expensive (average of £364). 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

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Burlington
Cambridge
Peabody
Somerville
Quincy
Waltham
Chelmsford

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Alternative routes for Portsmouth to Boston

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Portsmouth to Boston

Discover the top 10 airlines that operate flights from Portsmouth to Boston. 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 858,174 searches. Data last updated 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest£250Average£418FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
TAP AIR PORTUGALCheapest£279Average£424FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
DeltaCheapest£296Average£535FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Scandinavian AirlinesCheapest£297Average£447FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£304Average£458FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£304Average£396FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
JetBlueCheapest£329Average£496FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
United AirlinesCheapest£334Average£384FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
British AirwaysCheapest£338Average£427FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapest£342Average£490FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portsmouth to Boston?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portsmouth to Boston. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to Boston?

Cheapflights simply makes it quick and affordable to book flights from Portsmouth to Boston by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Portsmouth to Boston with no change fees?

Yes! Cheapflights helps users easily find flights from Portsmouth to Boston with no change fees.

Can Cheapflights notify me if prices for flights from Portsmouth to Boston become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Boston from Portsmouth today and book when prices fit your budget.

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