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Cheap flights from Portsmouth to the United States from £276

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 2/11. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
29 Jul — 5 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to USA

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to USA
Explore the most affordable flight options available from Portsmouth to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 June 2026.

Mon 2/1117:30
SOU
-
LAX
1 stop26h 15m
Virgin Atlantic
Thu 12/1113:45
LAX
-
SOU
1 stop19h 15m
Virgin Atlantic
Deal found 25/6£289
Mon 2/1109:20
SOU
-
LAX
1 stop17h 10m
British Airways
Thu 12/1120:15
LAX
-
SOU
1 stop15h 15m
British Airways
Deal found 25/6£477
Sun 11/1009:20
SOU
-
LAX
1 stop17h 05m
British Airways
Tue 20/1020:10
LAX
-
SOU
1 stop15h 20m
British Airways
Deal found 25/6£482
Thu 24/917:20
SOU
-
LAX
1 stop33h 05m
British Airways
Thu 15/1020:10
LAX
-
SOU
1 stop15h 20m
British Airways
Deal found 25/6£492
Sat 21/1109:20
SOU
-
JFK
1 stop15h 05m
British Airways
Fri 27/1121:10
JFK
-
SOU
1 stop14h 25m
British Airways
Deal found 25/6£511
Mon 2/1109:20
SOU
-
JFK
1 stop15h 05m
British Airways
Sun 8/1121:10
JFK
-
SOU
1 stop17h 20m
British Airways
Deal found 25/6£514
Mon 21/909:20
SOU
-
JFK
1 stop15h 00m
British Airways
Mon 28/916:55
JFK
-
SOU
1 stop10h 45m
British Airways
Deal found 25/6£514
Mon 21/909:20
SOU
-
EWR
1 stop11h 45m
British Airways
Mon 28/917:35
EWR
-
SOU
1 stop10h 05m
British Airways
Deal found 25/6£514
Thu 29/1017:05
SOU
-
IAD
1 stop31h 25m
British Airways
Thu 5/1117:05
IAD
-
SOU
1 stop18h 30m
British Airways
Deal found 25/6£517
Sat 21/1117:05
SOU
-
EWR
1 stop28h 10m
British Airways
Fri 27/1117:45
EWR
-
SOU
1 stop9h 55m
British Airways
Deal found 25/6£518
Wed 15/709:20
SOU
-
IAD
1 stop11h 25m
British Airways
Wed 22/717:15
IAD
-
SOU
1 stop10h 25m
British Airways
Deal found 25/6£520
Thu 24/917:20
SOU
-
JFK
1 stop31h 00m
British Airways
Thu 15/1016:55
JFK
-
SOU
1 stop10h 45m
British Airways
Deal found 25/6£524

Find flight deals from Portsmouth to USA

Keep the following information in mind while searching for Portsmouth to USA flight deals. Data was last updated 29 June 2026.

Round-trip from

£289

One-way from

£276

Popular in

June

Cheapest in

September

Average price

£590
Virgin Atlantic
  • Virgin Atlantic
  • 2/11-12/11
  • 3 total stops
  • 41h 55m total
  • Portsmouth to USA
Search Deals
2/11
  • 2/11
  • 2 total stops
  • 53h 10m total
  • Portsmouth to USA
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£65 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to USA 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 858,174 searches. Data last updated 29 June 2026.
Use the filters below to find and compare flights from Portsmouth to the United States that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 24/9

17:20-18:25

1 stop33h 05m

Los Angeles Los Angeles

Thu 15/10

20:10-19:30

1 stop15h 20m

£492

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Sat 21/11

09:20-19:25

1 stop15h 05m

New York John F Kennedy Intl

Fri 27/11

21:10-16:35

1 stop14h 25m

£512

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

17:05-20:30

1 stop31h 25m

Washington, D.C. Dulles Intl

Thu 5/11

17:05-16:35

1 stop18h 30m

£517

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Sat 21/11

17:05-16:15

1 stop28h 10m

Newark

Fri 27/11

17:45-08:40

1 stop9h 55m

£518

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Thu 12/11

09:20-16:15

1 stop11h 55m

Newark

Mon 16/11

17:45-08:40

1 stop9h 55m

£542

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Sat 26/9

09:20-19:20

1 stop15h 00m

New York John F Kennedy Intl

Tue 29/9

16:55-08:05

1 stop10h 10m

£545

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Sat 21/11

09:20-21:20

2 stops17h 00m

New York LaGuardia

Fri 27/11

17:10-08:40

2 stops34h 30m

£545

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Fri 6/11

17:05-15:35

1 stop30h 30m

San Francisco

Tue 10/11

17:20-19:30

1 stop18h 10m

£548

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Thu 15/10

09:20-17:10

1 stop15h 50m

Seattle/Tacoma Intl

Mon 19/10

19:10-19:30

1 stop16h 20m

£552

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Mon 2/11

08:40-22:26

2 stops18h 46m

New York LaGuardia

Sun 8/11

09:10-08:10

2 stops18h 00m

£568

Flights are sorted by cheapest return flights first.

Deals found on 26/6

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
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6

Best time to book a flight from Portsmouth to USA

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

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

Find hourly flight availability from Portsmouth to USA. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 29 June 2026.

A simple way to save on the total cost of your ticket is to fly from Portsmouth to USA in the morning. If you’re flexible enough to do this you can expect to save up to 9% on your trip compared to booking a flight at midday.

Weekly flight availability from Portsmouth to USA

Explore weekly flight availability from Portsmouth to USA. 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 29 June 2026.

The most flights from P0R to US0 are scheduled on a Sunday (54 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (45 on average).

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

Use this chart to determine the cheapest time to fly return from Portsmouth to USA. Price data was last updated on 27 June 2026.

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

Reviews of airlines servicing USA

Get insights into the airlines that provide service to USA. 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 USA. Reviews last updated 29 June 2026.
Get a feel of what it's like to fly with Aer Lingus from Portsmouth to the United States by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,631 reviews
Check prices

Comfort

7.2

Food

6.7

Entertainment

7.0

Crew

8.1

Boarding

7.4

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.
Aer Lingus
7.3
Good
1,631 reviews
Aer Lingus
7.3
Good
1,631 reviews
Check prices

Comfort

7.2

Food

6.7

Entertainment

7.0

Crew

8.1

Boarding

7.4

Overall

7.3

Reviews

1 / 20
10.0
Excellent

Griffith,Feb 2026

MAN - DUB

Great experience. Crew was friendly, food was better than what I have experienced with some other airlines and seat pitch was adequate. I would fly Aer Lingus again.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to USA. 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 Portsmouth to USA?

    Airlines like British Airways, Delta, and KLM fly from Portsmouth to USA in about 18h 46m. The time it takes to get you to your destination can typically vary by up to 14h 19m. There are 3412 mi between Portsmouth and USA. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

    Most travelers choose Southampton Eastleigh - New York John F Kennedy Intl, Southampton Eastleigh - Newark or Southampton Eastleigh - New York LaGuardia when deciding on the best route from Portsmouth to USA.

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

    The top 3 most reliable airlines when flying from Portsmouth to USA are Malaysia Airlines (94%), Royal Jordanian (89%) and KLM (89%).

  • What are the cheapest flights from Portsmouth to USA?

    While on average a flight from Portsmouth to USA is generally £3,093, our data shows the cheapest flight currently is £320. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £551 for that flight.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portsmouth to USA 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

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Alternative routes for Portsmouth to USA

See prices for flight routes from nearby airports that may be better suited for you.
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Top 10 airlines flying from Portsmouth to USA

Discover the top 10 airlines that operate flights from Portsmouth to USA. 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 858,174 searches. Data last updated 29 June 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£92Average£579FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£119Average£550FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£150Average£634FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IberiaCheapest£166Average£641FlexibilityNo cancel feeOn-time77%
Search Iberia flights
A.P.G.Cheapest£222Average£463FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
TAP AIR PORTUGALCheapest£229Average£488FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
SWISSCheapest£250Average£465FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Norse Atlantic UKCheapest£259Average£475FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£292Average£462FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£308Average£693FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portsmouth to USA?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Portsmouth to USA. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to USA?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to USA from Portsmouth.

Can Cheapflights find flights from Portsmouth to USA with no change fees?

Yes! Cheapflights helps users easily find flights from Portsmouth to USA with no change fees.

Can Cheapflights notify me if prices for flights from Portsmouth to USA become cheaper?

Not ready to book yet? You can track prices for flights from Portsmouth to USA on Cheapflights with our Price Alert feature and get notified when better prices are available.

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