$365+ Cheap flights from Boston (BOS) to Portsmouth, England
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — LHR
Oct 14 — Oct 211
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
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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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 September 14, 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 September 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/246:25 pm -
1 stop10h 20m
Sat 10/319:20 am -
1 stop14h 45m
Deal found 9/10![Aer Lingus logo]()
$698
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Wed 10/286:15 pm -
1 stop10h 35m
Wed 11/49:15 am -
2 stops38h 50m
Deal found 9/13![Multiple Airlines logo]()
$857
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/246:25 pm -
1 stop10h 20m
Sat 10/318:20 am -
2 stops34h 35m
Deal found 9/10![Multiple Airlines logo]()
$893
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Wed 10/2810:20 pm -
1 stop17h 10m
Wed 11/49:20 am -
1 stop14h 45m
Deal found 9/13![Aer Lingus logo]()
$904
This Delta deal was found by Cheapflights users on 9/10. 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.
Sun 9/274:40 pm -
1 stop10h 55m
Mon 10/125:20 pm -
1 stop24h 55m
Deal found 9/10![Delta logo]()
$942
This Delta deal was found by Cheapflights users on 9/10. 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.
Sun 9/277:30 am -
2 stops20h 05m
Thu 10/89:05 am -
1 stop12h 31m
Deal found 9/10![Delta logo]()
$947
This Delta deal was found by Cheapflights users on 9/13. 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 10/289:10 am -
2 stops19h 00m
Wed 11/48:40 am -
2 stops15h 26m
Deal found 9/13![Delta logo]()
$957
This Mytrip deal was found by Cheapflights users on 9/12. 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 10/115:25 pm -
1 stop10h 15m
Sun 10/188:00 pm -
2 stops23h 45m
Deal found 9/12![Multiple Airlines logo]()
$982
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 10/85:25 pm -
1 stop10h 15m
Thu 10/159:20 am -
1 stop14h 30m
Deal found 9/10![Aer Lingus logo]()
$991
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 September 14, 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 September 14, 2026.
This Delta deal was found by Cheapflights users on 9/10. 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.
Wed 9/307:00 pm -
1 stop16h 50m
Tue 10/135:20 pm -
1 stop24h 55m
Deal found 9/10![Delta logo]()
$942
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 10/85:25 pm -
1 stop10h 15m
Thu 10/159:20 am -
1 stop14h 30m
Deal found 9/10![Aer Lingus logo]()
$991
This Delta deal was found by Cheapflights users on 9/13. 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 stop15h 10m
Mon 11/95:45 pm -
1 stop25h 28m
Deal found 9/13![Delta logo]()
$942
This Cheapflightsfares deal was found by Cheapflights users on 9/12. 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 10/65:25 pm -
1 stop9h 40m
Sun 10/185:20 pm -
2 stops28h 40m
Deal found 9/12![Aer Lingus logo]()
$1,002
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 9/2811:00 am -
2 stops16h 35m
Tue 10/135:20 pm -
1 stop24h 55m
Deal found 9/10![Delta logo]()
$947
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 9/2811:00 am -
2 stops16h 35m
Wed 10/145:20 pm -
1 stop28h 16m
Deal found 9/10![Delta logo]()
$947
This Delta deal was found by Cheapflights users on 9/13. 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 10/289:10 am -
2 stops19h 00m
Wed 11/48:40 am -
2 stops15h 26m
Deal found 9/13![Delta logo]()
$957
This Delta deal was found by Cheapflights users on 9/10. 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.
Fri 9/254:40 pm -
1 stop11h 05m
Mon 10/125:20 pm -
1 stop24h 55m
Deal found 9/10![Delta logo]()
$992
This Delta deal was found by Cheapflights users on 9/10. 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.
Thu 10/81:35 pm -
2 stops14h 00m
Thu 10/159:05 am -
1 stop12h 31m
Deal found 9/10![Delta logo]()
$997
This Delta deal was found by Cheapflights users on 9/9. 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.
Mon 2/1511:00 am -
2 stops16h 10m
Sun 2/215:30 pm -
1 stop25h 43m
Deal found 9/9![Delta logo]()
$1,006
Last-minute flights from Boston to PortsmouthDiscover last-minute flight deals from Boston to Portsmouth. Data last updated September 14, 2026 and is based on user searches.
Discover last-minute flight deals from Boston to Portsmouth. Data last updated September 14, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/10. 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.
Sun 9/274:40 pm -
1 stop10h 55m
Fri 10/99:05 am -
1 stop12h 31m
Deal found 9/10![Delta logo]()
$942
This Delta deal was found by Cheapflights users on 9/10. 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.
Sun 9/277:30 am -
2 stops20h 05m
Thu 10/89:05 am -
1 stop12h 31m
Deal found 9/10![Delta logo]()
$947
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Thu 10/85:25 pm -
1 stop10h 15m
Thu 10/159:20 am -
1 stop14h 30m
Deal found 9/10![Aer Lingus logo]()
$991
This Mytrip deal was found by Cheapflights users on 9/12. 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 10/115:25 pm -
1 stop10h 15m
Sun 10/188:00 pm -
2 stops23h 45m
Deal found 9/12![Multiple Airlines logo]()
$982
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/246:25 pm -
1 stop10h 20m
Sat 10/319:20 am -
1 stop14h 45m
Deal found 9/10![Aer Lingus logo]()
$698
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 10/246:25 pm -
1 stop10h 20m
Sat 10/318:20 am -
2 stops34h 35m
Deal found 9/10![Multiple Airlines logo]()
$893
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Wed 10/286:15 pm -
1 stop10h 35m
Wed 11/49:15 am -
2 stops38h 50m
Deal found 9/13![Multiple Airlines logo]()
$857
This Kiwi.com deal was found by Cheapflights users on 9/13. 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.
Wed 10/2810:20 pm -
1 stop17h 10m
Wed 11/49:20 am -
1 stop14h 45m
Deal found 9/13![Aer Lingus logo]()
$904
This Delta deal was found by Cheapflights users on 9/13. 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 10/289:10 am -
2 stops19h 00m
Wed 11/48:40 am -
2 stops15h 26m
Deal found 9/13![Delta logo]()
$957
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 September 14, 2026.
Search for one-way flight options from Boston to Portsmouth. Find affordable one-way fares based on user searches. Data last updated September 14, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/118:50 pm -
3 stops41h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Multiple Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/119:15 pm -
1 stop14h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/9![Aer Lingus logo]()
$381
This Delta deal was found by Cheapflights users on 9/10. 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.
Sun 12/278:55 pm -
1 stop15h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$450
This Delta deal was found by Cheapflights users on 9/10. 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.
Tue 12/297:25 pm -
1 stop16h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$452
This Delta deal was found by Cheapflights users on 9/10. 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.
Mon 12/285:40 am -
2 stops30h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$454
This Delta deal was found by Cheapflights users on 9/10. 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 2/208:45 pm -
2 stops30h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$468
This Delta deal was found by Cheapflights users on 9/10. 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.
Thu 12/317:25 pm -
1 stop16h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/10![Delta logo]()
$502
This Delta deal was found by Cheapflights users on 9/13. 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 9/274:40 pm -
1 stop10h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![Delta logo]()
$573
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 September 14, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $698 (Aer Lingus) |
One-way from | $365 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $763 |
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 September 14, 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
Sun 10/11
8:50 pm-7:30 pm
3 stops41h 40m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$365
Quickest round-trip
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Sun 10/11
9:15 pm-4:50 pm
1 stop14h 35m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$381
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Tue 12/29
7:25 pm-5:00 pm
1 stop16h 35m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$452
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Tue 2/16
3:10 pm-5:00 pm
2 stops20h 50m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$456
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Wed 12/30
12:00 pm-5:00 pm
2 stops24h 00m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$456
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Thu 2/18
7:20 pm-5:00 pm
1 stop16h 40m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$502
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Sat 2/20
7:20 pm-8:10 am
1 stop31h 50m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$502
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Sat 1/2
5:40 am-8:55 am
2 stops22h 15m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$506
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Mon 9/28
8:25 pm-4:50 pm
1 stop15h 25m
Southampton Eastleigh
Wed 12/31
12:00 am-6:00 pm
Nonstop0h 00m
$573
BostonSouthampton
BOS Boston Logan Intl - SOU Southampton Eastleigh
BOSSOU
Boston Logan Intl
Wed 9/30
7:00 pm-4:50 pm
1 stop16h 50m
Southampton Eastleigh
Tue 10/13
5:20 pm-1:15 pm
1 stop24h 55m
$942
Showing 1-10 of 19 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 September 14, 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 September 14, 2026.
The most flights from BOS to P0R are scheduled on a Friday (34 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (15 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 September 14, 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.
Comfort
7.2
Crew
8.1
Entertainment
7.0
Boarding
7.5
Overall
7.3
Food
6.7
Reviews
1 / 20
4.0
OkayAnonymous,Jun 2026
BOS - SNN
Comfort
7.2
Crew
8.1
Entertainment
7.0
Boarding
7.5
Overall
7.3
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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Alternative routes for Boston to Portsmouth
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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 September 14, 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 September 14, 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 7,457,451 searches. Data last updated September 14, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$352 | Average$885 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$413 | Average$789 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$429 | Average$661 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$449 | Average$793 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$463 | Average$805 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$466 | Average$716 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$470 | Average$696 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$479 | Average$750 | FlexibilityNo cancel fee | On-time67% | |
| Cheapest$481 | Average$716 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$494 | Average$788 | FlexibilityNo cancel fee | On-time75% |