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Cheap flights from Portsmouth to Boston from £417

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 20/7. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — BOS
28 Jul — 4 Aug1
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 28 June 2026.

Tue 4/809:15
SOU
-
BOS
1 stop10h 40m
Aer Lingus
Tue 11/821:15
BOS
-
SOU
1 stop14h 35m
Aer Lingus
Deal found 26/6£493
Tue 4/809:15
SOU
-
BOS
1 stop10h 40m
British Airways
Tue 11/821:15
BOS
-
SOU
1 stop17h 15m
British Airways
Deal found 25/6£515
Thu 3/909:20
SOU
-
BOS
1 stop10h 35m
British Airways
Sun 6/917:25
BOS
-
SOU
1 stop10h 15m
British Airways
Deal found 24/6£532
Wed 5/809:20
SOU
-
BOS
1 stop10h 35m
British Airways
Wed 26/821:15
BOS
-
SOU
1 stop17h 15m
British Airways
Deal found 25/6£550
Wed 5/809:20
SOU
-
BOS
1 stop10h 35m
British Airways
Fri 28/821:15
BOS
-
SOU
1 stop30h 20m
British Airways
Deal found 25/6£559

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 28 June 2026.

Round-trip from

£493

One-way from

£417

Popular in

June

Cheapest in

September

Average price

£613
Aer Lingus
  • Aer Lingus
  • 4/8-11/8
  • 2 total stops
  • 25h 15m total
  • Portsmouth to Boston
Search Deals
20/7
  • 20/7
  • 3 total stops
  • 44h 10m total
  • Portsmouth to Boston
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£53 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
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 28 June 2026.
Use the filters below to find and compare flights from Portsmouth to Boston that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Thu 3/9

09:20-14:55

1 stop10h 35m

Boston Logan Intl

Sun 6/9

17:25-08:40

1 stop10h 15m

£532
Fastest return journey

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Wed 5/8

09:20-14:55

1 stop10h 35m

Boston Logan Intl

Tue 25/8

17:25-08:05

1 stop9h 40m

£550

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Wed 5/8

09:20-14:55

1 stop10h 35m

Boston Logan Intl

Thu 27/8

17:25-08:40

1 stop10h 15m

£550

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Wed 5/8

09:15-07:25

2 stops27h 10m

Boston Logan Intl

Thu 27/8

13:34-17:35

2 stops23h 01m

£725

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Wed 5/8

09:15-07:25

2 stops27h 10m

Boston Logan Intl

Wed 26/8

20:25-17:35

1 stop16h 10m

£725
Cheapest one-way

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Mon 20/7

17:55-09:05

3 stops44h 10m

£417

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Mon 20/7

09:20-18:50

1 stop14h 30m

£438

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Thu 5/11

09:20-18:55

1 stop14h 35m

£454

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Tue 3/11

09:20-18:55

1 stop14h 35m

£454

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Tue 21/7

09:15-18:35

3 stops38h 20m

£457

Flights are sorted by cheapest return flights first.

Deals found on 27/6

Showing 1-10 of 14 resultsSorted by cheapest first
1
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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 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 28 June 2026.

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 evening tend to be the most expensive. A flight at midday could potentially save you up to 23% on airfare.

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 28 June 2026.

The most flights from P0R to BOS are scheduled on a Monday (36 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (22 on average).

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 27 June 2026.

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

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 16 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 10h 35m. Fly via British Airways 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 Scandinavian Airlines (97%), JetBlue (93%) and TAP AIR PORTUGAL (93%).

  • What are the cheapest flights from Portsmouth to Boston?

    The cheapest flight price from Portsmouth to Boston is £349. On average you can expect to pay £1,399. The most popular route, (Southampton Eastleigh - Boston Logan Intl), can usually be booked for £493.

  • 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.

See more FAQs

Travelling to a place near Boston?

Book flights to Boston if you plan to visit one of these locations
Burlington
Canton
North Truro
Waltham
Warwick
Cambridge
Peabody
Wellfleet
Revere
Somerville
Quincy
Chelmsford

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.

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 28 June 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest£150Average£579FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
TAP AIR PORTUGALCheapest£229Average£376FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£299Average£433FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
LufthansaCheapest£318Average£399FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Scandinavian AirlinesCheapest£320Average£429FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
JetBlueCheapest£330Average£568FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
British AirwaysCheapest£331Average£499FlexibilityNo cancel feeOn-time70%
Search British Airways flights
United AirlinesCheapest£338Average£405FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Aer LingusCheapest£359Average£501FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Virgin AtlanticCheapest£359Average£511FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic 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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