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Portsmouth

$371+ Cheap flights from the United States 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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Jun 10 — Jun 171
Wed 6/10
Wed 6/17
1 adult, Economy
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Cheap flight deals from USA to Portsmouth

Cheapest flights from USA to Portsmouth
Explore the most affordable flight options available from USA to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 11, 2026.

This Trip.com deal was found by Cheapflights users on 5/8. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/115:25 pm
BOS
-
SOU
1 stop10h 15m
Aer Lingus
Tue 5/269:20 am
SOU
-
BOS
1 stop14h 30m
Aer Lingus
Deal found 5/8$821
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/310:05 am
BOS
-
SOU
2 stops28h 25m
Multiple Airlines
Wed 6/103:35 pm
SOU
-
BOS
3 stops36h 04m
Multiple Airlines
Deal found 5/6$884
This Mytrip deal was found by Cheapflights users on 5/11. 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.
Mon 6/18:18 am
IAD
-
SOU
3 stops30h 12m
Multiple Airlines
Wed 6/173:35 pm
SOU
-
IAD
3 stops24h 36m
Multiple Airlines
Deal found 5/11$894
This Mytrip deal was found by Cheapflights users on 5/6. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/178:30 pm
JFK
-
SOU
2 stops18h 00m
Multiple Airlines
Thu 7/309:20 am
SOU
-
JFK
2 stops15h 00m
Multiple Airlines
Deal found 5/6$910
This Mytrip deal was found by Cheapflights users on 5/10. 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 7/59:05 pm
JFK
-
SOU
1 stop17h 25m
Multiple Airlines
Tue 7/216:05 pm
SOU
-
JFK
2 stops30h 15m
Multiple Airlines
Deal found 5/10$919
This Mytrip deal was found by Cheapflights users on 5/10. 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 7/511:55 pm
JFK
-
SOU
1 stop14h 35m
Aer Lingus
Tue 7/219:15 am
SOU
-
JFK
1 stop18h 10m
Aer Lingus
Deal found 5/10$923
This Kiwi.com deal was found by Cheapflights users on 5/9. 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.
Mon 8/104:55 pm
JFK
-
SOU
1 stop10h 45m
Multiple Airlines
Mon 8/245:55 pm
SOU
-
JFK
2 stops30h 25m
Multiple Airlines
Deal found 5/9$925
This Kiwi.com deal was found by Cheapflights users on 5/7. 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 7/174:55 pm
JFK
-
SOU
1 stop10h 45m
Aer Lingus
Thu 7/309:20 am
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Deal found 5/7$940
This Mytrip deal was found by Cheapflights users on 5/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/56:40 pm
EWR
-
SOU
2 stops19h 50m
Multiple Airlines
Fri 6/129:25 am
SOU
-
EWR
3 stops35h 05m
Multiple Airlines
Deal found 5/8$948
This Mytrip deal was found by Cheapflights users on 5/11. 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.
Mon 5/256:35 am
EWR
-
SOU
2 stops25h 15m
Multiple Airlines
Tue 6/99:20 am
SOU
-
EWR
2 stops18h 15m
Multiple Airlines
Deal found 5/11$951
This Mytrip deal was found by Cheapflights users on 5/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/1211:55 pm
JFK
-
SOU
1 stop14h 35m
Aer Lingus
Mon 6/159:20 am
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Deal found 5/8$955
This Mytrip deal was found by Cheapflights users on 5/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/125:35 pm
EWR
-
SOU
1 stop10h 05m
Aer Lingus
Mon 6/159:20 am
SOU
-
EWR
1 stop11h 45m
Aer Lingus
Deal found 5/8$956

Find flight deals from USA to Portsmouth

Keep the following information in mind while searching for USA to Portsmouth flight deals. Data was last updated May 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$884
(Mytrip)

One-way from

$371
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$689
Provider with most accurate pricing for New York (NYC)-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for New York (NYC)-London (LON) flights.
Search Deals
From USA to Portsmouth
Search Deals
One-way flight from USA to Portsmouth
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($7 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($12 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from USA 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 May 11, 2026.
Use the filters below to find and compare flights from the United States to Portsmouth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 10/13

7:00 am-8:35 am

2 stops17h 35m

Southampton Eastleigh

Wed 10/21

5:20 pm-11:45 am

1 stop26h 25m

$1,004

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Tue 10/13

7:00 am-8:35 am

2 stops17h 35m

Southampton Eastleigh

Tue 10/20

9:05 am-11:45 am

1 stop34h 40m

$1,004

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 10/14

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Thu 10/22

9:05 am-8:22 pm

2 stops19h 17m

$1,009

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Mon 10/12

1:45 pm-4:50 pm

1 stop19h 05m

Southampton Eastleigh

Thu 10/22

9:05 am-8:22 pm

2 stops19h 17m

$1,009

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Wed 9/16

7:00 am-8:35 am

2 stops17h 35m

Southampton Eastleigh

Fri 10/2

9:05 am-9:35 pm

2 stops20h 30m

$1,012

AtlantaSouthampton

ATL - SOU

ATLSOU

Atlanta Hartsfield-Jackson

Wed 10/21

10:40 pm-4:50 pm

1 stop13h 10m

Southampton Eastleigh

Fri 10/30

8:40 am-9:45 pm

1 stop17h 05m

$1,032

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Tue 10/6

4:45 pm-8:35 am

1 stop10h 50m

Southampton Eastleigh

Sun 10/18

9:15 am-1:15 pm

1 stop33h 00m

$1,036

AtlantaSouthampton

ATL - SOU

ATLSOU

Atlanta Hartsfield-Jackson

Tue 9/15

11:15 am-8:35 am

2 stops16h 20m

Southampton Eastleigh

Mon 10/5

5:20 pm-12:38 pm

1 stop24h 18m

$1,036

AtlantaSouthampton

ATL - SOU

ATLSOU

Atlanta Hartsfield-Jackson

Tue 9/15

1:15 pm-8:35 am

2 stops14h 20m

Southampton Eastleigh

Thu 10/8

5:20 pm-12:38 pm

1 stop24h 18m

$1,036

AtlantaSouthampton

ATL - SOU

ATLSOU

Atlanta Hartsfield-Jackson

Wed 10/21

1:15 pm-8:35 am

2 stops14h 20m

Southampton Eastleigh

Mon 11/2

5:30 pm-8:45 pm

1 stop32h 15m

$1,037

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/8

Showing 1-10 of 60 resultsSorted by cheapest first
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6

Best time to book a flight from USA to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from USA with our price prediction graph.
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 the United States to Portsmouth

What is the cheapest time of day to fly from US to P0R?

Find hourly flight availability from USA 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 May 11, 2026.

It’s typically best to fly out from USA to Portsmouth in the evening. Doing so could potentially save you 12% on the flight price compared to flying at noon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from USA to Portsmouth. Price data was last updated on May 9, 2026.

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

Weekly flight availability from USA to Portsmouth

Explore weekly flight availability from USA 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 May 11, 2026.

The most flights from US0 to P0R are scheduled on a Monday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (50 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 May 11, 2026.
See what other customers who have flown with Delta,KLM, andAer Lingus from the United States 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.
Delta
7.9
Good
8,448 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.9
Good
8,448 reviews
Delta
7.9
Good
8,448 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
KLM
7.8
Good
1,514 reviews
Delta
7.9
Good
8,448 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Aer Lingus
7.3
Good
1,553 reviews
Delta
7.9
Good
8,448 reviews

Overall

7.9

Boarding

8.1

Comfort

7.8

Crew

8.5

Entertainment

7.8

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

Find useful and relevant information for your journey from USA to Portsmouth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from USA to Portsmouth?

    Departing from USA to Portsmouth will take you 10h 05m. Airlines will cover a distance of 3428 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the most popular routes from USA to Portsmouth?

    When deciding which route to take from USA to Portsmouth consider New York John F Kennedy Intl - Southampton Eastleigh, Newark - Southampton Eastleigh or San Francisco - Southampton Eastleigh as they are the most popular.

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

    Before booking your flight to Portsmouth from USA, check out the most reliable airlines to get you to your destination on time: KLM (90%), Air France (90%), Delta( 90%).

  • What are the cheapest flights from USA to Portsmouth?

    While on average a flight from USA to Portsmouth is generally $2,771, our data shows the cheapest flight currently is $371. When looking at the most popular route, (New York John F Kennedy Intl - Southampton Eastleigh), you can expect to pay $777 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from USA to Portsmouth 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

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 USA to Portsmouth

Discover the top 10 airlines that operate flights from USA 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 May 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$45Average$680FlexibilityNo cancel feeOn-time62%
IcelandairCheapest$263Average$616FlexibilityNo cancel feeOn-time76%
Scandinavian AirlinesCheapest$287Average$689FlexibilityNo cancel feeOn-time77%
Brussels AirlinesCheapest$291Average$908FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$293Average$541FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$298Average$772FlexibilityNo cancel feeOn-time77%
Norse Atlantic UKCheapest$322Average$598FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$336Average$770FlexibilityNo cancel feeOn-time79%
American AirlinesCheapest$413Average$790FlexibilityNo cancel feeOn-time71%
Aer LingusCheapest$430Average$855FlexibilityNo cancel feeOn-timeN/A

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