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Cheap flights from Portsmouth to the United States from £257

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 1/3. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
15 Feb — 22 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to USA

Keep the following information in mind while searching for Portsmouth to USA flight deals. Data was last updated 16 January 2026.

Round-trip from

£421

One-way from

£257

Popular in

July

Cheapest in

September

Average price

£374
British Airways
  • British Airways
  • 1/3-8/3
  • 2 total stops
  • 21h 45m total
  • Portsmouth to USA
Search Deals
1/3
  • 1/3
  • 3 total stops
  • 57h 07m total
  • Portsmouth to USA
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£28 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Find 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 16 January 2026.

Sun 1/309:30
SOU
-
JFK
1 stop14h 59m
British Airways
Sun 8/318:00
JFK
-
SOU
1 stop17h 35m
British Airways
Deal found 15/1£421
Sun 1/309:30
SOU
-
EWR
1 stop11h 45m
British Airways
Sun 8/318:45
EWR
-
SOU
1 stop10h 00m
British Airways
Deal found 15/1£421
Mon 2/309:30
SOU
-
EWR
1 stop11h 45m
British Airways
Mon 23/318:45
EWR
-
SOU
1 stop13h 10m
British Airways
Deal found 15/1£422
Sun 25/109:30
SOU
-
JFK
1 stop14h 59m
British Airways
Sat 7/217:00
JFK
-
SOU
1 stop10h 45m
British Airways
Deal found 14/1£424
Sun 25/109:30
SOU
-
EWR
1 stop11h 45m
British Airways
Sat 7/217:45
EWR
-
SOU
1 stop10h 00m
British Airways
Deal found 14/1£424
Tue 17/312:25
SOU
-
JFK
1 stop12h 00m
British Airways
Fri 24/421:05
JFK
-
SOU
1 stop14h 30m
British Airways
Deal found 15/1£426
Mon 2/309:30
SOU
-
EWR
1 stop11h 45m
British Airways
Mon 9/318:45
EWR
-
SOU
1 stop16h 50m
British Airways
Deal found 16/1£426
Sun 15/320:10
SOU
-
JFK
1 stop28h 15m
British Airways
Thu 23/423:45
JFK
-
SOU
1 stop14h 45m
British Airways
Deal found 15/1£431
Thu 12/209:30
SOU
-
EWR
1 stop11h 45m
British Airways
Thu 5/317:45
EWR
-
SOU
1 stop10h 00m
British Airways
Deal found 15/1£431
Sun 1/309:30
SOU
-
BOS
1 stop14h 29m
Aer Lingus
Sun 8/318:10
BOS
-
SOU
1 stop10h 35m
Aer Lingus
Deal found 15/1£433
Thu 22/120:10
SOU
-
LGA
2 stops30h 19m
British Airways
Mon 26/111:15
LGA
-
SOU
2 stops19h 40m
British Airways
Deal found 13/1£435
Fri 23/120:10
SOU
-
JFK
1 stop28h 19m
British Airways
Mon 26/117:00
JFK
-
SOU
1 stop13h 55m
British Airways
Deal found 15/1£436

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 16 January 2026.
Use the filters below to find and compare flights from Portsmouth to the United States that are best for you.

Fly from

Portsmouth

Fly to

USA

Route

Depart

Return

Price

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Sun 1/3

09:30-16:15

1 stop11h 45m

Newark

Sun 8/3

18:45-08:45

1 stop10h 00m

£421

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Mon 2/3

09:30-16:15

1 stop11h 45m

Newark

Mon 23/3

18:45-11:55

1 stop13h 10m

£422

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Mon 2/3

09:30-16:15

1 stop11h 45m

Newark

Mon 9/3

18:45-11:55

1 stop13h 10m

£425

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Wed 11/2

12:25-19:29

1 stop12h 04m

New York John F Kennedy Intl

Wed 4/3

17:00-08:45

1 stop10h 45m

£425

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Wed 18/3

12:25-20:25

1 stop12h 00m

New York John F Kennedy Intl

Sun 26/4

16:55-08:40

1 stop10h 45m

£426

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Tue 17/3

12:25-20:25

1 stop12h 00m

New York John F Kennedy Intl

Sun 26/4

16:55-08:40

1 stop10h 45m

£426

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 2/3

09:30-19:29

1 stop14h 59m

New York John F Kennedy Intl

Mon 9/3

18:00-11:55

1 stop13h 55m

£426

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Wed 18/3

12:25-20:25

1 stop12h 00m

New York John F Kennedy Intl

Wed 22/4

21:05-19:30

1 stop17h 25m

£426

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Thu 12/2

09:30-16:15

1 stop11h 45m

Newark

Thu 5/3

17:45-08:45

1 stop10h 00m

£431

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 1/3

09:30-18:59

1 stop14h 29m

Boston Logan Intl

Sun 8/3

18:10-08:45

1 stop10h 35m

£433

Flights are sorted by cheapest return flights first.

Deals found on 14/1

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

Currently, October is the cheapest month in which you can book a flight from Portsmouth to USA (average of £90). Flying from Portsmouth to USA in December is currently the most expensive (average of £300). 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 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 16 January 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 8% on your trip compared to booking a flight in the afternoon.

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 10 January 2026.

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

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 16 January 2026.

The most flights from P0R to US0 are scheduled on a Thursday (50 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (38 on average).

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 16 January 2026.
Get a feel of what it's like to fly with KLM, Virgin Atlantic, andAer 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.
KLM
7.7
Good
1,440 reviews
Check prices

Food

7.2

Comfort

7.6

Crew

8.4

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,440 reviews
KLM
7.7
Good
1,440 reviews
Check prices

Food

7.2

Comfort

7.6

Crew

8.4

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Virgin Atlantic
7.5
Good
678 reviews
KLM
7.7
Good
1,440 reviews
Check prices

Food

7.2

Comfort

7.6

Crew

8.4

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Aer Lingus
7.2
Good
1,435 reviews
KLM
7.7
Good
1,440 reviews
Check prices

Food

7.2

Comfort

7.6

Crew

8.4

Overall

7.7

Entertainment

7.1

Boarding

7.8

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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, Aer Lingus, and Delta fly from Portsmouth to USA in about 11h 45m. The time it takes to get you to your destination can typically vary by up to 5h 45m. There are 3428 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 - Newark, Southampton Eastleigh - New York John F Kennedy Intl or Southampton Eastleigh - Orlando 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 SriLankan Airlines (97%), Air Canada (93%) and Austrian Airlines (93%).

  • What are the cheapest flights from Portsmouth to USA?

    While on average a flight from Portsmouth to USA is generally £2,662, our data shows the cheapest flight currently is £343. When looking at the most popular route, (Southampton Eastleigh - Newark), you can expect to pay £421 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.

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

    Currently, October is the cheapest month in which you can book a flight from Portsmouth to USA (average of £90). Flying from Portsmouth to USA in December is currently the most expensive (average of £300). 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 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 16 January 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£90Average£586FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
TAP AIR PORTUGALCheapest£123Average£455FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
DeltaCheapest£148Average£596FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£216Average£516FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
IberiaCheapest£239Average£564FlexibilityNo cancel feeOn-time77%
Search Iberia flights
PLAYCheapest£249Average£420FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
SWISSCheapest£278Average£465FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Scandinavian AirlinesCheapest£285Average£499FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£288Average£506FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£296Average£495FlexibilityNo cancel feeOn-time69%
Search United Airlines 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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