$354+ 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 11/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Sep 9 — Sep 161
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
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Best
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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 10, 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 10, 2026.
This Kissandfly.com deal was found by Cheapflights users on 8/5. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:25 pm -
1 stop10h 15m
Sun 10/119:20 am -
1 stop14h 30m
Deal found 8/5![Aer Lingus logo]()
$831
This Kissandfly.com deal was found by Cheapflights users on 8/10. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:25 pm -
1 stop10h 10m
Mon 9/289:20 am -
1 stop14h 30m
Deal found 8/10![Aer Lingus logo]()
$833
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 9/285:25 pm -
2 stops14h 25m
Sun 10/119:20 am -
1 stop10h 35m
Deal found 8/5![Multiple Airlines logo]()
$853
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 9/125:25 pm -
1 stop10h 10m
Mon 9/288:40 pm -
2 stops53h 25m
Deal found 8/10![Multiple Airlines logo]()
$887
This Mytrip deal was found by Cheapflights users on 8/5. 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 9/1810:40 am -
2 stops27h 50m
Fri 9/258:00 pm -
2 stops27h 07m
Deal found 8/5![Multiple Airlines logo]()
$901
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Thu 8/2011:35 pm -
1 stop15h 05m
Mon 8/317:20 pm -
2 stops30h 35m
Deal found 8/8![Multiple Airlines logo]()
$1,071
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 10, 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 10, 2026.
This Kissandfly.com deal was found by Cheapflights users on 8/10. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:25 pm -
1 stop10h 10m
Mon 9/289:20 am -
1 stop14h 30m
Deal found 8/10![Aer Lingus logo]()
$833
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 9/285:25 pm -
2 stops14h 25m
Sun 10/119:20 am -
1 stop10h 35m
Deal found 8/5![Multiple Airlines logo]()
$853
This Delta deal was found by Cheapflights users on 8/10. 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.
Sat 9/126:00 pm -
2 stops33h 35m
Mon 9/285:20 pm -
2 stops30h 11m
Deal found 8/10![Delta logo]()
$1,133
This Mytrip deal was found by Cheapflights users on 8/5. 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 9/1810:40 am -
2 stops27h 50m
Fri 9/258:00 pm -
2 stops27h 07m
Deal found 8/5![Multiple Airlines logo]()
$901
This Cheapflightsfares deal was found by Cheapflights users on 8/10. 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 10/61:00 pm -
2 stops14h 05m
Sun 10/189:20 am -
1 stop10h 35m
Deal found 8/10![Aer Lingus logo]()
$1,124
This Delta deal was found by Cheapflights users on 8/9. 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 11/47:25 pm -
1 stop31h 45m
Sat 11/145:30 pm -
1 stop25h 43m
Deal found 8/9![Delta logo]()
$1,169
This Delta deal was found by Cheapflights users on 8/9. 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 stop30h 15m
Sun 11/155:30 pm -
1 stop25h 43m
Deal found 8/9![Delta logo]()
$1,169
This Delta deal was found by Cheapflights users on 8/9. 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 11/57:25 pm -
1 stop16h 35m
Sun 11/155:30 pm -
1 stop25h 43m
Deal found 8/9![Delta logo]()
$1,219
This Delta deal was found by Cheapflights users on 8/9. 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 11/57:25 pm -
1 stop16h 35m
Sat 11/145:30 pm -
1 stop30h 31m
Deal found 8/9![Delta logo]()
$1,219
This Delta deal was found by Cheapflights users on 8/8. 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.
Sat 8/228:25 pm -
1 stop15h 35m
Tue 9/19:05 am -
1 stop12h 30m
Deal found 8/8![Delta logo]()
$1,221
This Delta deal was found by Cheapflights users on 8/8. 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.
Sat 8/228:25 pm -
1 stop15h 35m
Wed 9/29:15 am -
1 stop12h 20m
Deal found 8/8![Delta logo]()
$1,221
Last-minute flights from Boston to PortsmouthDiscover last-minute flight deals from Boston to Portsmouth. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Portsmouth. Data last updated August 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 8/8. 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.
Thu 8/2011:35 pm -
1 stop15h 05m
Mon 8/317:20 pm -
2 stops30h 35m
Deal found 8/8![Multiple Airlines logo]()
$1,071
This Kissandfly.com deal was found by Cheapflights users on 8/10. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/125:25 pm -
1 stop10h 10m
Mon 9/289:20 am -
1 stop14h 30m
Deal found 8/10![Aer Lingus logo]()
$833
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 9/125:25 pm -
1 stop10h 10m
Mon 9/288:40 pm -
2 stops53h 25m
Deal found 8/10![Multiple Airlines logo]()
$887
This Mytrip deal was found by Cheapflights users on 8/5. 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 9/1810:40 am -
2 stops27h 50m
Fri 9/258:00 pm -
2 stops27h 07m
Deal found 8/5![Multiple Airlines logo]()
$901
This Kissandfly.com deal was found by Cheapflights users on 8/5. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/285:25 pm -
1 stop10h 15m
Sun 10/119:20 am -
1 stop14h 30m
Deal found 8/5![Aer Lingus logo]()
$831
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 9/285:25 pm -
2 stops14h 25m
Sun 10/119:20 am -
1 stop10h 35m
Deal found 8/5![Multiple Airlines logo]()
$853
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 10, 2026.
Search for one-way flight options from Boston to Portsmouth. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This Mytrip deal was found by Cheapflights users on 8/10. 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 11/87:50 pm -
2 stops18h 40m
Deal found 8/10![Multiple Airlines logo]()
$354
This Fareboom deal was found by Cheapflights users on 8/5. 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 Fareboom is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/99:15 pm -
2 stops12h 15m
Deal found 8/5![Multiple Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 8/10. 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 11/85:50 pm -
1 stop9h 50m
Deal found 8/10![Aer Lingus logo]()
$391
This Kiwi.com deal was found by Cheapflights users on 8/5. 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 1/99:15 pm -
1 stop30h 25m
Deal found 8/5![Aer Lingus logo]()
$402
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Thu 12/317:50 pm -
2 stops15h 45m
Deal found 8/6![Multiple Airlines logo]()
$415
This Kiwi.com deal was found by Cheapflights users on 8/6. 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.
Thu 12/319:20 pm -
1 stop14h 15m
Deal found 8/6![Aer Lingus logo]()
$447
This Delta deal was found by Cheapflights users on 8/9. 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 stop30h 15m
Deal found 8/9![Delta logo]()
$452
This Kiwi.com deal was found by Cheapflights users on 8/6. 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 9/510:00 pm -
2 stops29h 40m
Deal found 8/6![Multiple Airlines logo]()
$460
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 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $831 (Kissandfly.com) |
One-way from | $354 (Mytrip) |
Popular in | June |
Cheapest in | January |
Average price | $716 |
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 August 10, 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
Quickest round-trip
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Sat 9/12
5:25 pm-8:35 am
1 stop10h 10m
Southampton Eastleigh
Mon 9/28
9:20 am-6:50 pm
1 stop14h 30m
$833
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Mon 9/28
5:25 pm-12:50 pm
2 stops14h 25m
Southampton Eastleigh
Sun 10/11
9:20 am-2:55 pm
1 stop10h 35m
$853
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Fri 9/18
10:40 am-7:30 pm
2 stops27h 50m
Southampton Eastleigh
Fri 9/25
8:00 pm-6:07 pm
2 stops27h 07m
$901
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Tue 10/6
1:00 pm-8:05 am
2 stops14h 05m
Southampton Eastleigh
Sun 10/18
9:20 am-2:55 pm
1 stop10h 35m
$1,124
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Sat 9/12
6:00 pm-8:35 am
2 stops33h 35m
Southampton Eastleigh
Mon 9/28
5:20 pm-6:31 pm
2 stops30h 11m
$1,133
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Wed 11/4
7:25 pm-8:10 am
1 stop31h 45m
Southampton Eastleigh
Sat 11/14
5:30 pm-2:13 pm
1 stop25h 43m
$1,169
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Wed 11/4
8:55 pm-8:10 am
1 stop30h 15m
Southampton Eastleigh
Sun 11/15
5:30 pm-2:13 pm
1 stop25h 43m
$1,169
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Thu 11/5
7:25 pm-5:00 pm
1 stop16h 35m
Southampton Eastleigh
Sun 11/15
5:30 pm-2:13 pm
1 stop25h 43m
$1,219
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Thu 11/5
7:25 pm-5:00 pm
1 stop16h 35m
Southampton Eastleigh
Sat 11/14
5:30 pm-7:01 pm
1 stop30h 31m
$1,219
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Sat 8/22
8:25 pm-5:00 pm
1 stop15h 35m
Southampton Eastleigh
Tue 9/1
9:05 am-4:35 pm
1 stop12h 30m
$1,221
Showing 1-10 of 20 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 10, 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 10, 2026.
The most flights from BOS to P0R are scheduled on a Friday (39 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (22 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 10, 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.
Overall
7.3
Crew
8.1
Comfort
7.2
Boarding
7.5
Entertainment
7.0
Food
6.7
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
BOS - SNN
Overall
7.3
Crew
8.1
Comfort
7.2
Boarding
7.5
Entertainment
7.0
Food
6.7
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 10, 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 10, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 2,558,603 searches. Data last updated August 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$352 | Average$885 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$418 | Average$757 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$425 | Average$454 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$430 | Average$727 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$441 | Average$659 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$463 | Average$786 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$466 | Average$703 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$470 | Average$684 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$479 | Average$742 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$481 | Average$696 | FlexibilityNo cancel fee | On-time77% |