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Portsmouth

$301+ 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 2/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
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 December 18, 2025.

This KLM deal was found by Cheapflights users on 12/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:05 pmIAD - SOU
1 stop17h 55mKLM
Sun 1/115:45 pmSOU - IAD
2 stops30h 24mKLM
Deal found 12/16$766
This Delta deal was found by Cheapflights users on 12/16. 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 12/301:45 pmLAX - SOU
1 stop34h 35mDelta
Tue 1/135:35 pmSOU - LAX
1 stop26h 10mDelta
Deal found 12/16$789
This Delta deal was found by Cheapflights users on 12/16. 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 12/3011:59 pmLAX - SOU
2 stops24h 21mDelta
Mon 1/125:35 pmSOU - LAX
1 stop26h 10mDelta
Deal found 12/16$793
This Delta deal was found by Cheapflights users on 12/16. 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 12/301:45 pmLAX - SOU
1 stop34h 35mDelta
Sun 2/15:45 pmSOU - LAX
1 stop26h 00mDelta
Deal found 12/16$839
This Delta deal was found by Cheapflights users on 12/17. 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 12/314:25 pmORD - SOU
1 stop9h 55mDelta
Thu 1/85:35 pmSOU - ORD
2 stops34h 17mDelta
Deal found 12/17$854
This Delta deal was found by Cheapflights users on 12/17. 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 12/307:00 amORD - SOU
2 stops28h 00mDelta
Thu 1/85:35 pmSOU - ORD
2 stops34h 17mDelta
Deal found 12/17$859
This Delta deal was found by Cheapflights users on 12/17. 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 12/314:25 pmORD - SOU
1 stop9h 55mDelta
Fri 1/99:00 amSOU - ORD
2 stops30h 41mDelta
Deal found 12/17$861
This Delta deal was found by Cheapflights users on 12/17. 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 12/314:25 pmORD - SOU
1 stop19h 00mDelta
Tue 1/65:35 pmSOU - ORD
1 stop26h 45mDelta
Deal found 12/17$862
This Delta deal was found by Cheapflights users on 12/16. 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 12/301:45 pmLAX - SOU
1 stop34h 35mDelta
Sat 1/319:25 amSOU - LAX
1 stop34h 20mDelta
Deal found 12/16$865
This Delta deal was found by Cheapflights users on 12/16. 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 12/301:45 pmLAX - SOU
1 stop34h 35mDelta
Thu 1/89:00 amSOU - LAX
2 stops20h 39mDelta
Deal found 12/16$866
This Delta deal was found by Cheapflights users on 12/17. 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 12/307:00 amORD - SOU
2 stops28h 00mDelta
Tue 1/65:35 pmSOU - ORD
1 stop26h 45mDelta
Deal found 12/17$908
This Delta deal was found by Cheapflights users on 12/17. 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 12/294:25 pmORD - SOU
1 stop18h 35mDelta
Thu 1/85:35 pmSOU - ORD
2 stops34h 17mDelta
Deal found 12/17$929

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 December 18, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$581
(Mytrip)

One-way from

$301
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$731
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
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 18, 2025.
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

Mon 2/2

7:10 pm-5:05 pm

1 stop16h 55m

Southampton Eastleigh

Thu 3/19

6:05 pm-7:55 pm

1 stop29h 50m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

7:10 pm-5:05 pm

1 stop16h 55m

Southampton Eastleigh

Tue 3/17

5:35 pm-2:20 pm

1 stop24h 45m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Thu 3/19

6:05 pm-7:55 pm

1 stop29h 50m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 2/4

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Tue 3/17

5:35 pm-7:55 pm

1 stop30h 20m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 2/4

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Wed 3/18

5:35 pm-2:20 pm

1 stop24h 45m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Mon 2/2

7:10 pm-5:05 pm

1 stop16h 55m

Southampton Eastleigh

Fri 3/20

8:40 am-7:55 pm

1 stop15h 15m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

8:50 pm-5:05 pm

1 stop15h 15m

Southampton Eastleigh

Fri 3/20

8:40 am-7:55 pm

1 stop15h 15m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

7:10 pm-5:05 pm

1 stop16h 55m

Southampton Eastleigh

Wed 3/18

8:40 am-7:55 pm

1 stop15h 15m

$672

New YorkSouthampton

JFK - SOU

JFKSOU

New York John F Kennedy Intl

Tue 1/13

9:20 pm-5:05 pm

1 stop14h 45m

Southampton Eastleigh

Tue 1/20

9:25 am-7:20 pm

1 stop14h 55m

$672

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Sun 2/1

10:05 am-8:50 am

2 stops17h 45m

Southampton Eastleigh

Mon 3/16

5:35 pm-2:20 pm

1 stop24h 45m

$676

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 60 results
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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 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 $492). 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 December 18, 2025.

It’s typically best to fly out from USA to Portsmouth in the evening. Doing so could potentially save you 14% 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 December 16, 2024.

Travelers seeking maximum savings on their USA to Portsmouth flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday 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 December 18, 2025.

The most flights from US0 to P0R are scheduled on a Monday (52 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (35 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 December 18, 2025.
See what other customers who have flown with Delta, KLM, and Virgin Atlantic 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
8,004 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

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
8,004 reviews
Delta
7.9
Good
8,004 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

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
1,428 reviews
Delta
7.9
Good
8,004 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

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.
Virgin Atlantic
7.5
Good
675 reviews
Delta
7.9
Good
8,004 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

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
1,395 reviews
Delta
7.9
Good
8,004 reviews

Comfort

7.9

Food

7.3

Entertainment

7.9

Crew

8.5

Boarding

8.1

Overall

7.9

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, Los Angeles - 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 (90%), Austrian Airlines (90%), United Airlines( 90%).

  • What are the cheapest flights from USA to Portsmouth?

    While on average a flight from USA to Portsmouth is generally $3,098, our data shows the cheapest flight currently is $266. When looking at the most popular route, (New York John F Kennedy Intl - Southampton Eastleigh), you can expect to pay $742 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 $492). 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$45Average$723FlexibilityNo cancel feeOn-time62%
Norse Atlantic UKCheapest$221Average$567FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$293Average$568FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$320Average$710FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$357Average$626FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$370Average$860FlexibilityNo cancel feeOn-time76%
PLAYCheapest$382Average$645FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$387Average$790FlexibilityNo cancel feeOn-time75%
FinnairCheapest$401Average$746FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$408Average$882FlexibilityNo cancel feeOn-timeN/A

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