$530+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Sep 28 — Oct 51
Round-trip
1 adult, Economy
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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
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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
Best
Last-minute
One-way
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 August 29, 2026.
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 August 29, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/29. 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.
Tue 10/135:25 pm -
1 stop9h 40m
Tue 10/209:15 am -
2 stops40h 50m
Deal found 8/29![Multiple Airlines logo]()
$702
This FlightHub deal was found by Cheapflights users on 8/28. 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.
Tue 10/65:25 pm -
1 stop9h 40m
Sun 10/189:20 am -
1 stop10h 35m
Deal found 8/28![Aer Lingus logo]()
$706
This Mytrip deal was found by Cheapflights users on 8/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/139:15 pm -
1 stop17h 15m
Tue 10/209:15 am -
1 stop14h 35m
Deal found 8/29![Aer Lingus logo]()
$842
This Kiwi.com deal was found by Cheapflights users on 8/29. 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.
Sun 10/115:25 pm -
1 stop10h 15m
Sun 10/2512:25 pm -
1 stop11h 40m
Deal found 8/29![Aer Lingus logo]()
$852
This Mytrip deal was found by Cheapflights users on 8/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/912:30 pm -
2 stops26h 00m
Fri 10/168:00 pm -
2 stops25h 05m
Deal found 8/25![Multiple Airlines logo]()
$853
This Kiwi.com deal was found by Cheapflights users on 8/29. 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.
Sun 10/1111:35 pm -
2 stops53h 40m
Sun 10/2512:25 pm -
1 stop11h 40m
Deal found 8/29![Multiple Airlines logo]()
$883
This Kiwi.com deal was found by Cheapflights users on 8/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/99:15 pm -
1 stop14h 35m
Fri 10/169:20 am -
1 stop10h 35m
Deal found 8/25![Aer Lingus logo]()
$893
This Mytrip deal was found by Cheapflights users on 8/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:25 pm -
1 stop10h 15m
Sun 10/49:20 am -
1 stop10h 35m
Deal found 8/29![Aer Lingus logo]()
$945
Best flights from Boston to PortsmouthDiscover 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 August 29, 2026.
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 August 29, 2026.
This Mytrip deal was found by Cheapflights users on 8/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/912:30 pm -
2 stops26h 00m
Fri 10/168:00 pm -
2 stops25h 05m
Deal found 8/25![Multiple Airlines logo]()
$853
This Delta deal was found by Cheapflights users on 8/29. 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.
Wed 11/48:55 pm -
1 stop14h 55m
Fri 11/138:40 am -
1 stop10h 33m
Deal found 8/29![Delta logo]()
$1,121
This Cheapflightsfares deal was found by Cheapflights users on 8/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/69:15 pm -
1 stop17h 15m
Sun 10/189:20 am -
1 stop10h 35m
Deal found 8/25![Aer Lingus logo]()
$1,137
This Delta deal was found by Cheapflights users on 8/29. 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.
Wed 11/44:00 pm -
2 stops19h 50m
Thu 11/125:20 pm -
1 stop25h 53m
Deal found 8/29![Delta logo]()
$1,125
This Delta deal was found by Cheapflights users on 8/29. 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.
Fri 11/68:55 pm -
1 stop14h 55m
Fri 11/138:40 am -
1 stop10h 33m
Deal found 8/29![Delta logo]()
$1,171
This Delta deal was found by Cheapflights users on 8/29. 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.
Sun 11/88:55 pm -
1 stop14h 55m
Sun 11/155:30 pm -
1 stop25h 43m
Deal found 8/29![Delta logo]()
$1,171
This Delta deal was found by Cheapflights users on 8/29. 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.
Fri 11/68:55 pm -
1 stop14h 55m
Thu 11/128:40 am -
1 stop10h 33m
Deal found 8/29![Delta logo]()
$1,171
Last-minute flights from Boston to PortsmouthDiscover last-minute flight deals from Boston to Portsmouth. Data last updated August 29, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Portsmouth. Data last updated August 29, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/29. 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.
Sat 9/195:25 pm -
1 stop10h 10m
Sun 10/48:00 pm -
2 stops27h 50m
Deal found 8/29![Multiple Airlines logo]()
$1,040
This Justfly.com deal was found by Cheapflights users on 8/29. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/195:15 am -
2 stops22h 20m
Sun 10/48:00 pm -
2 stops25h 10m
Deal found 8/29![Aer Lingus logo]()
$1,133
This Mytrip deal was found by Cheapflights users on 8/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:25 pm -
1 stop10h 15m
Sun 10/49:20 am -
1 stop10h 35m
Deal found 8/29![Aer Lingus logo]()
$945
This Kiwi.com deal was found by Cheapflights users on 8/29. 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.
Sun 9/205:25 pm -
1 stop10h 15m
Sun 10/48:00 pm -
2 stops27h 50m
Deal found 8/29![Multiple Airlines logo]()
$1,038
This KAYAK deal was found by Cheapflights users on 8/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/205:25 pm -
1 stop10h 15m
Thu 9/248:00 pm -
1 stop23h 55m
Deal found 8/25![Aer Lingus logo]()
$1,268
This KAYAK deal was found by Cheapflights users on 8/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:25 pm -
1 stop10h 15m
Fri 9/258:00 pm -
1 stop23h 55m
Deal found 8/25![Aer Lingus logo]()
$1,493
One-way flights from Boston to PortsmouthSearch for one-way flight options from Boston to Portsmouth. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.
Search for one-way flight options from Boston to Portsmouth. Find affordable one-way fares based on user searches. Data last updated August 29, 2026.
This KAYAK deal was found by Cheapflights users on 8/26. 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.
Thu 10/229:15 pm -
1 stop17h 15m
Deal found 8/26![Aer Lingus logo]()
$530
This KAYAK deal was found by Cheapflights users on 8/28. 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.
Sat 9/269:15 pm -
1 stop30h 25m
Deal found 8/28![Aer Lingus logo]()
$532
This Delta deal was found by Cheapflights users on 8/28. 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.
Wed 9/94:40 pm -
1 stop19h 10m
Deal found 8/28![Delta logo]()
$573
This Delta deal was found by Cheapflights users on 8/28. 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 9/104:40 pm -
1 stop10h 55m
Deal found 8/28![Delta logo]()
$623
This KAYAK deal was found by Cheapflights users on 8/25. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/85:25 pm -
1 stop18h 25m
Deal found 8/25![Aer Lingus logo]()
$641
This Delta deal was found by Cheapflights users on 8/25. 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.
Thu 9/34:40 pm -
1 stop10h 55m
Deal found 8/25![Delta logo]()
$843
This KAYAK deal was found by Cheapflights users on 8/29. 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 10/205:25 pm -
1 stop9h 40m
Deal found 8/29![Aer Lingus logo]()
$2,329
This KAYAK deal was found by Cheapflights users on 8/27. 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.
Sat 9/195:25 pm -
1 stop10h 10m
Deal found 8/27![Aer Lingus logo]()
$5,222
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 August 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $702 (Kiwi.com) |
One-way from | $530 (KAYAK) |
Popular in | June |
Cheapest in | January |
Average price | $768 |
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 7,457,451 searches. Data last updated August 29, 2026.
Use the filters below to find and compare flights from Boston to Portsmouth that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Fri 10/9
12:30 pm-7:30 pm
2 stops26h 00m
Southampton Eastleigh
Fri 10/16
8:00 pm-4:05 pm
2 stops25h 05m
$853
Quickest round-trip
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Wed 11/4
8:55 pm-4:50 pm
1 stop14h 55m
Southampton Eastleigh
Fri 11/13
8:40 am-2:13 pm
1 stop10h 33m
$1,121
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Wed 11/4
4:00 pm-4:50 pm
2 stops19h 50m
Southampton Eastleigh
Thu 11/12
5:20 pm-2:13 pm
1 stop25h 53m
$1,125
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Tue 10/6
9:15 pm-7:30 pm
1 stop17h 15m
Southampton Eastleigh
Sun 10/18
9:20 am-2:55 pm
1 stop10h 35m
$1,137
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Fri 11/6
8:55 pm-4:50 pm
1 stop14h 55m
Southampton Eastleigh
Fri 11/13
8:40 am-2:13 pm
1 stop10h 33m
$1,171
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Sun 11/8
8:55 pm-4:50 pm
1 stop14h 55m
Southampton Eastleigh
Sun 11/15
5:30 pm-2:13 pm
1 stop25h 43m
$1,171
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Fri 11/6
8:55 pm-4:50 pm
1 stop14h 55m
Southampton Eastleigh
Thu 11/12
8:40 am-2:13 pm
1 stop10h 33m
$1,171
Cheapest one-way
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Thu 10/22
9:15 pm-7:30 pm
1 stop17h 15m
$530
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Sat 9/26
9:15 pm-8:40 am
1 stop30h 25m
$532
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Wed 9/9
4:40 pm-4:50 pm
1 stop19h 10m
$573
Showing 1-10 of 15 resultsSorted by cheapest first
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.
BOS-SOU
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
BOS-P0R
BOS-SOU
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 August 29, 2026.
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
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 August 29, 2026.
The most flights from BOS to P0R are scheduled on a Friday (39 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (13 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 August 29, 2026.
See what other customers who have flown with 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.
Food
6.7
Comfort
7.2
Overall
7.3
Boarding
7.5
Entertainment
7.0
Crew
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
BOS - SNN
Food
6.7
Comfort
7.2
Overall
7.3
Boarding
7.5
Entertainment
7.0
Crew
8.1
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
BOS - SNN
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.
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Complete your trip
Complete your trip to Portsmouth by adding a car rental and/or hotel reservation to your travel itinerary.
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Find flights from Boston to Portsmouth, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Boston and Portsmouth flights
Browse other Boston and Portsmouth flight options. Last updated on August 29, 2026.
Other flights from Boston
Browse through other flights departing from Boston. Flights are based on user searches made on Cheapflights and were last updated on August 29, 2026.
Popular flight searches
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Boston to Portsmouth flights
Consider these flights traveling from Boston to Portsmouth.
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 7,457,451 searches. Data last updated August 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$352 | Average$885 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$415 | Average$771 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$425 | Average$454 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$430 | Average$779 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$441 | Average$661 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$463 | Average$796 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$466 | Average$703 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$470 | Average$689 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$479 | Average$742 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$481 | Average$711 | FlexibilityNo cancel fee | On-time77% |