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$258+ 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 7/28. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap 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 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$765
(Delta)

One-way from

$258
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$593
Provider with most accurate pricing for New York (NYC)-London (LON) flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-London (LON) flights.
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From USA to Portsmouth
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One-way flight from USA to Portsmouth
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High demand for flights, 5% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($11 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find 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 1, 2025.

This Connections by easyJet deal was found by Cheapflights users on 4/30. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/311:00 pmEWR - SOU
1 stop27h 35mMultiple Airlines
Mon 5/198:05 amSOU - EWR
1 stop17h 55mMultiple Airlines
Deal found 4/30$635
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 5/212:15 amJFK - SOU
2 stops27h 20mMultiple Airlines
Mon 5/198:05 amSOU - JFK
1 stop19h 10mMultiple Airlines
Deal found 4/30$690
This Delta deal was found by Cheapflights users on 4/29. 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 9/75:30 pmJFK - SOU
1 stop10h 15mDelta
Mon 9/225:35 pmSOU - JFK
1 stop26h 50mDelta
Deal found 4/29$765
This Delta deal was found by Cheapflights users on 4/30. 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 8/66:45 pmBOS - SOU
1 stop9h 00mDelta
Wed 8/209:20 amSOU - BOS
1 stop14h 05mDelta
Deal found 4/30$766
This KLM deal was found by Cheapflights users on 4/30. 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.
Fri 9/54:50 pmBOS - SOU
1 stop10h 55mKLM
Tue 9/165:35 pmSOU - BOS
1 stop25h 05mKLM
Deal found 4/30$784
This Delta deal was found by Cheapflights users on 4/29. 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 9/91:45 pmSFO - SOU
1 stop35h 00mDelta
Tue 9/235:35 pmSOU - SFO
1 stop26h 10mDelta
Deal found 4/29$801
This KLM deal was found by Cheapflights users on 4/30. 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.
Wed 8/135:25 pmIAD - SOU
1 stop19h 25mKLM
Mon 8/186:25 pmSOU - IAD
1 stop26h 10mKLM
Deal found 4/30$802
This KLM deal was found by Cheapflights users on 4/30. 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.
Fri 9/55:30 pmJFK - SOU
1 stop19h 00mKLM
Tue 9/169:20 amSOU - JFK
1 stop14h 45mKLM
Deal found 4/30$816
This Virgin Atlantic deal was found by Cheapflights users on 4/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/59:59 amJFK - SOU
2 stops17h 46mVirgin Atlantic
Tue 9/169:20 amSOU - JFK
1 stop14h 45mVirgin Atlantic
Deal found 4/30$820
This Virgin Atlantic deal was found by Cheapflights users on 4/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/241:50 pmLAX - SOU
1 stop19h 10mVirgin Atlantic
Wed 10/89:20 amSOU - LAX
1 stop13h 30mVirgin Atlantic
Deal found 4/30$830
This Delta deal was found by Cheapflights users on 4/30. 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 10/151:50 pmLAX - SOU
1 stop34h 55mDelta
Mon 10/275:20 pmSOU - LAX
1 stop26h 25mDelta
Deal found 4/30$831
This Cheapflightsfares deal was found by Cheapflights users on 4/30. 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.
Fri 9/511:15 amBOS - SOU
2 stops16h 25mAer Lingus
Tue 9/169:10 amSOU - BOS
2 stops20h 08mAer Lingus
Deal found 4/30$863

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 1, 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

New YorkSouthampton

JFK - SOU

JFKSOU

New York John F Kennedy Intl

Sun 9/7

5:30 pm-8:45 am

1 stop10h 15m

Southampton Eastleigh

Thu 9/18

9:20 am-3:25 pm

1 stop11h 05m

$765

New YorkSouthampton

JFK - SOU

JFKSOU

New York John F Kennedy Intl

Sun 9/7

12:50 am-5:00 pm

1 stop11h 10m

Southampton Eastleigh

Mon 9/15

5:35 pm-3:25 pm

1 stop26h 50m

$766

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Wed 8/6

6:45 pm-8:45 am

1 stop9h 00m

Southampton Eastleigh

Wed 8/20

9:20 am-6:25 pm

1 stop14h 05m

$766

BostonSouthampton

BOS - SOU

BOSSOU

Boston Logan Intl

Fri 9/5

4:50 pm-8:45 am

1 stop10h 55m

Southampton Eastleigh

Tue 9/16

5:35 pm-1:40 pm

1 stop25h 05m

$784

Washington, D.C.Southampton

IAD - SOU

IADSOU

Washington, D.C. Dulles Intl

Wed 8/13

5:25 pm-5:50 pm

1 stop19h 25m

Southampton Eastleigh

Mon 8/18

6:25 pm-3:35 pm

1 stop26h 10m

$802

New YorkSouthampton

JFK - SOU

JFKSOU

New York John F Kennedy Intl

Fri 9/5

9:59 am-8:45 am

2 stops17h 46m

Southampton Eastleigh

Tue 9/16

9:20 am-7:05 pm

1 stop14h 45m

$820

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 9/24

1:50 pm-5:00 pm

1 stop19h 10m

Southampton Eastleigh

Wed 10/8

9:20 am-2:50 pm

1 stop13h 30m

$830

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 10/15

1:50 pm-8:45 am

1 stop34h 55m

Southampton Eastleigh

Mon 10/27

5:20 pm-12:45 pm

1 stop26h 25m

$831

San FranciscoSouthampton

SFO - SOU

SFOSOU

San Francisco

Sun 5/4

1:45 pm-8:50 am

1 stop35h 05m

Southampton Eastleigh

Sun 5/11

9:20 am-11:45 am

1 stop34h 25m

$832

NewarkSouthampton

EWR - SOU

EWRSOU

Newark

Sat 5/31

11:00 pm-7:35 am

1 stop27h 35m

Southampton Eastleigh

Tue 6/17

8:00 pm-9:00 pm

2 stops30h 00m

$837

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 56 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, November is the cheapest month in which you can book a flight from USA to Portsmouth (average of $661). Flying from USA to Portsmouth in June is currently the most expensive (average of $1,103). 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 May 1, 2025.

When flying from USA 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 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 1, 2025.

The most flights from US0 to P0R are scheduled on a Monday (58 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (42 on average).

Rainfall in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portsmouth ranges from 1.0 - 3.0 inches per month. December is typically the wettest month, when rainfall can reach 3.0 in. July is typically the driest time to visit Portsmouth when rainfall is around 1.0 in.

Temperature in Portsmouth by month

Plan your trip to Portsmouth by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portsmouth, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 64.4 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 39.2 F).

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 1, 2025.
Get a feel of what it's like to fly with Delta, KLM and Virgin Atlantic from USA to Portsmouth by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
643 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air Canada
7.0
Good
9,245 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.0
Good
1,076 reviews
Delta
8.0
Very good
7,934 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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.

  • What are the cheapest airlines to fly from USA to Portsmouth one-way?

    For one-way options, check prices for Delta. According to our data, you can fly for as low as $430. Users have also found prices from $490 and $496 on Aer Lingus and KLM, respectively.

  • 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: Air Canada (83%), Austrian Airlines (83%), United Airlines( 83%).

  • What are the cheapest flights from USA to Portsmouth?

    While on average a flight from USA to Portsmouth is generally $2,457, our data shows the cheapest flight currently is $386. When looking at the most popular route, (New York John F Kennedy Intl - Southampton Eastleigh), you can expect to pay $766 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, November is the cheapest month in which you can book a flight from USA to Portsmouth (average of $661). Flying from USA to Portsmouth in June is currently the most expensive (average of $1,103). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest$203Average$598FlexibilityNo cancel feeOn-time77%
SWISSCheapest$245Average$688FlexibilityNo cancel feeOn-time79%
WestJetCheapest$272Average$933FlexibilityNo cancel feeOn-time60%
Norse Atlantic UKCheapest$284Average$558FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$291Average$790FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$340Average$663FlexibilityNo cancel feeOn-time77%
PLAYCheapest$356Average$514FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$360Average$853FlexibilityNo cancel feeOn-time62%
KLMCheapest$366Average$902FlexibilityNo cancel feeOn-time75%
IcelandairCheapest$371Average$629FlexibilityNo cancel feeOn-time76%

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