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Portsmouth

$325+ 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Mar 7 — Mar 141
Sat 3/7
Sat 3/14
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 February 5, 2026.

This Mytrip deal was found by Cheapflights users on 2/2. 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.
Thu 3/191:00 pm
BOS
-
SOU
2 stops26h 40m
Multiple Airlines
Thu 3/269:30 am
SOU
-
BOS
2 stops15h 50m
Multiple Airlines
Deal found 2/2$593
This Mytrip deal was found by Cheapflights users on 2/2. 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.
Thu 3/1910:20 pm
BOS
-
SOU
1 stop17h 20m
Aer Lingus
Thu 3/269:30 am
SOU
-
BOS
1 stop14h 25m
Aer Lingus
Deal found 2/2$639
This Expedia deal was found by Cheapflights users on 2/4. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/75:45 pm
EWR
-
SOU
1 stop10h 00m
Aer Lingus
Mon 2/239:30 am
SOU
-
EWR
1 stop11h 45m
Aer Lingus
Deal found 2/4$664
This Delta deal was found by Cheapflights users on 2/3. 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 9/134:40 pm
JFK
-
SOU
1 stop10h 55m
Delta
Thu 9/249:05 am
SOU
-
JFK
1 stop13h 02m
Delta
Deal found 2/3$695
This Delta deal was found by Cheapflights users on 2/4. 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 2/166:00 am
EWR
-
SOU
2 stops21h 50m
Delta
Mon 2/238:50 am
SOU
-
EWR
2 stops38h 05m
Delta
Deal found 2/4$695
This Delta deal was found by Cheapflights users on 2/3. 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 3/3110:30 pm
JFK
-
SOU
1 stop13h 20m
Delta
Tue 4/149:05 am
SOU
-
JFK
1 stop15h 05m
Delta
Deal found 2/3$696
This Delta deal was found by Cheapflights users on 2/3. 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 3/226:45 pm
JFK
-
SOU
1 stop9h 35m
Delta
Tue 4/149:05 am
SOU
-
JFK
1 stop15h 05m
Delta
Deal found 2/3$697
This Delta deal was found by Cheapflights users on 2/2. 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 3/319:10 pm
JFK
-
SOU
1 stop14h 40m
Delta
Wed 4/159:05 am
SOU
-
JFK
1 stop10h 30m
Delta
Deal found 2/2$698
This Delta deal was found by Cheapflights users on 2/2. 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 3/294:40 pm
JFK
-
SOU
1 stop10h 55m
Delta
Tue 4/149:05 am
SOU
-
JFK
1 stop10h 30m
Delta
Deal found 2/2$699
This Delta deal was found by Cheapflights users on 2/3. 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 4/51:50 pm
JFK
-
SOU
2 stops13h 45m
Delta
Tue 4/149:05 am
SOU
-
JFK
1 stop15h 05m
Delta
Deal found 2/3$700
This Delta deal was found by Cheapflights users on 2/2. 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 8/2510:30 am
JFK
-
SOU
2 stops17h 15m
Delta
Tue 9/15:20 pm
SOU
-
JFK
1 stop26h 15m
Delta
Deal found 2/2$702
This Delta deal was found by Cheapflights users on 2/2. 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 3/306:00 am
JFK
-
SOU
2 stops21h 35m
Delta
Wed 4/159:05 am
SOU
-
JFK
1 stop10h 30m
Delta
Deal found 2/2$703

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 February 5, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$593
(Mytrip)

One-way from

$325
(Delta)

Popular in

December

Cheapest in

September

Average price

$569
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. 4% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 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 February 5, 2026.
Use the filters below to find and compare flights from the United States to Portsmouth that are best for you.

Fly from

USA

Fly to

Portsmouth

Route

Depart

Return

Price

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 3/19

10:15 am-7:40 pm

3 stops29h 25m

Southampton Eastleigh

Thu 3/26

9:30 am-9:20 pm

2 stops15h 50m

$597

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Thu 3/19

10:20 pm-7:40 pm

1 stop17h 20m

Southampton Eastleigh

Thu 3/26

9:30 am-7:55 pm

1 stop14h 25m

$639

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Wed 2/18

3:58 pm-5:05 pm

2 stops20h 07m

Southampton Eastleigh

Thu 2/26

8:50 am-9:00 pm

2 stops17h 10m

$695

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Tue 2/17

7:05 am-8:50 am

2 stops20h 45m

Southampton Eastleigh

Tue 2/24

5:35 pm-5:55 pm

2 stops29h 20m

$695

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Tue 2/17

8:05 am-8:50 am

2 stops19h 45m

Southampton Eastleigh

Mon 2/23

8:50 am-5:55 pm

2 stops38h 05m

$695

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Wed 2/18

3:58 pm-5:05 pm

2 stops20h 07m

Southampton Eastleigh

Wed 2/25

8:50 am-9:00 pm

2 stops17h 10m

$695

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Tue 2/17

11:49 am-8:50 am

2 stops16h 01m

Southampton Eastleigh

Wed 2/25

8:50 am-9:00 pm

2 stops17h 10m

$695

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Wed 2/18

3:58 pm-5:05 pm

2 stops20h 07m

Southampton Eastleigh

Tue 2/24

8:50 am-9:00 pm

2 stops17h 10m

$695

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Wed 2/18

3:58 pm-5:05 pm

2 stops20h 07m

Southampton Eastleigh

Mon 2/23

5:40 pm-9:00 pm

2 stops32h 20m

$695

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Tue 2/17

7:05 am-8:50 am

2 stops20h 45m

Southampton Eastleigh

Thu 2/26

6:05 pm-7:18 pm

2 stops30h 13m

$695

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/3

Showing 1-10 of 60 results
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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 month to book a flight from USA to Portsmouth?

Currently, October is the cheapest month in which you can book a flight from USA to Portsmouth (average of $95). Flying from USA to Portsmouth in June is currently the most expensive (average of $490). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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 February 5, 2026.

It’s typically best to fly out from USA to Portsmouth in the evening. Doing so could potentially save you 31% 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 January 31, 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 February 5, 2026.

The most flights from US0 to P0R are scheduled on a Monday (50 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (37 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 February 5, 2026.
See what other customers who have flown with Delta, KLM, and Aer 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
8,147 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,147 reviews
Delta
7.9
Good
8,147 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.7
Good
1,448 reviews
Delta
7.9
Good
8,147 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Aer Lingus
7.2
Good
1,445 reviews
Delta
7.9
Good
8,147 reviews

Comfort

7.9

Food

7.2

Crew

8.5

Overall

7.9

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 16h 55m. Airlines will cover a distance of 3228 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, San Francisco - Southampton Eastleigh or Newark - 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: Air Canada (88%), Austrian Airlines (88%), United Airlines( 88%).

  • What are the cheapest flights from USA to Portsmouth?

    While on average a flight from USA to Portsmouth is generally $3,124, our data shows the cheapest flight currently is $251. When looking at the most popular route, (New York John F Kennedy Intl - Southampton Eastleigh), you can expect to pay $700 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.

  • What is the cheapest month to book a flight from USA to Portsmouth?

    Currently, October is the cheapest month in which you can book a flight from USA to Portsmouth (average of $95). Flying from USA to Portsmouth in June is currently the most expensive (average of $490). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for USA to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
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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 February 5, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$45Average$740FlexibilityNo cancel feeOn-time62%
Norse Atlantic UKCheapest$129Average$562FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$263Average$611FlexibilityNo cancel feeOn-time76%
SWISSCheapest$293Average$701FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$293Average$531FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$334Average$629FlexibilityNo cancel feeOn-time77%
PLAYCheapest$380Average$509FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$387Average$833FlexibilityNo cancel feeOn-time75%
FinnairCheapest$401Average$727FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$408Average$807FlexibilityNo cancel feeOn-timeN/A

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