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Cheap flights from Portsmouth to the United States from £289

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 19/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
10 Mar — 17 Mar1
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 8 February 2026.

Mon 23/216:05
SOU
-
EWR
2 stops26h 30m
Multiple Airlines
Mon 9/318:40
EWR
-
SOU
2 stops16h 55m
Multiple Airlines
Deal found 7/2£394
Mon 23/216:05
SOU
-
JFK
2 stops28h 40m
Multiple Airlines
Mon 9/318:35
JFK
-
SOU
2 stops17h 00m
Multiple Airlines
Deal found 7/2£440
Mon 9/317:40
SOU
-
JFK
1 stop30h 40m
KLM
Wed 25/318:45
JFK
-
SOU
1 stop9h 35m
KLM
Deal found 6/2£517
Tue 22/920:00
SOU
-
JFK
2 stops21h 25m
Multiple Airlines
Mon 28/916:55
JFK
-
SOU
1 stop10h 45m
Multiple Airlines
Deal found 7/2£534
Mon 9/308:50
SOU
-
JFK
2 stops16h 39m
Virgin Atlantic
Wed 25/317:40
JFK
-
SOU
1 stop10h 40m
Virgin Atlantic
Deal found 6/2£535
Fri 18/920:00
SOU
-
JFK
2 stops21h 20m
Multiple Airlines
Tue 29/916:55
JFK
-
SOU
1 stop10h 10m
Multiple Airlines
Deal found 7/2£538
Mon 9/319:55
SOU
-
EWR
2 stops24h 35m
Multiple Airlines
Tue 24/318:45
EWR
-
SOU
1 stop13h 10m
Multiple Airlines
Deal found 8/2£538
Mon 9/308:50
SOU
-
LGA
2 stops18h 47m
Delta
Wed 25/311:45
LGA
-
SOU
2 stops16h 35m
Delta
Deal found 6/2£540
Mon 9/308:50
SOU
-
JFK
2 stops16h 39m
Delta
Wed 25/319:59
JFK
-
SOU
2 stops17h 26m
Delta
Deal found 6/2£543
Mon 9/308:50
SOU
-
EWR
2 stops18h 12m
Delta
Tue 24/313:17
EWR
-
SOU
2 stops15h 03m
Delta
Deal found 8/2£544
Mon 23/319:55
SOU
-
JFK
2 stops29h 10m
Multiple Airlines
Mon 30/316:55
JFK
-
SOU
1 stop10h 45m
Multiple Airlines
Deal found 6/2£548
Tue 24/317:35
SOU
-
JFK
1 stop22h 50m
KLM
Tue 31/321:10
JFK
-
SOU
1 stop14h 40m
KLM
Deal found 7/2£549

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 8 February 2026.

Round-trip from

£394

One-way from

£289

Popular in

July

Cheapest in

September

Average price

£361
23/2-9/3
  • 23/2-9/3
  • 4 total stops
  • 43h 25m total
  • Portsmouth to USA
Search Deals
19/4
  • 19/4
  • 3 total stops
  • 38h 55m total
  • Portsmouth to USA
Search Deals
Highest demand for flights based on searches. 8% potential increase in price (£26 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 February 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 8 February 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

Mon 23/2

16:05-13:35

2 stops26h 30m

Newark

Mon 9/3

18:40-15:35

2 stops16h 55m

£394

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 9/3

08:50-21:29

2 stops16h 39m

New York John F Kennedy Intl

Wed 25/3

17:40-08:20

1 stop10h 40m

£535

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Mon 9/3

08:50-23:37

2 stops18h 47m

New York LaGuardia

Wed 25/3

11:45-08:20

2 stops16h 35m

£540

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 9/3

08:50-21:29

2 stops16h 39m

New York John F Kennedy Intl

Wed 25/3

19:59-17:25

2 stops17h 26m

£543

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Mon 9/3

08:50-23:02

2 stops18h 12m

Newark

Tue 24/3

13:17-08:20

2 stops15h 03m

£544

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 23/3

19:55-21:05

2 stops29h 10m

New York John F Kennedy Intl

Mon 30/3

16:55-08:40

1 stop10h 45m

£548

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 23/3

17:40-16:45

1 stop27h 05m

New York John F Kennedy Intl

Mon 30/3

16:40-08:35

1 stop10h 55m

£552

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Tue 24/3

08:50-16:45

1 stop11h 55m

New York John F Kennedy Intl

Tue 31/3

13:50-08:35

2 stops13h 45m

£558

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Tue 24/3

08:50-21:29

2 stops16h 39m

New York John F Kennedy Intl

Tue 31/3

13:50-08:35

2 stops13h 45m

£563

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Tue 24/3

08:50-23:37

2 stops18h 47m

New York LaGuardia

Tue 31/3

14:00-08:35

2 stops13h 35m

£563

Flights are sorted by cheapest return flights first.

Deals found on 5/2

Showing 1-10 of 60 results
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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 £89). Flying from Portsmouth to USA in December is currently the most expensive (average of £294). 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 8 February 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 7 February 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. Sunday afternoons 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 8 February 2026.

The most flights from P0R to US0 are scheduled on a Tuesday (50 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (36 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 8 February 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
1,450 reviews
Check prices

Comfort

7.6

Entertainment

7.1

Food

7.3

Overall

7.7

Boarding

7.8

Crew

8.4

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
1,450 reviews
KLM
7.7
Good
1,450 reviews
Check prices

Comfort

7.6

Entertainment

7.1

Food

7.3

Overall

7.7

Boarding

7.8

Crew

8.4

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
1,450 reviews
Check prices

Comfort

7.6

Entertainment

7.1

Food

7.3

Overall

7.7

Boarding

7.8

Crew

8.4

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
1,447 reviews
KLM
7.7
Good
1,450 reviews
Check prices

Comfort

7.6

Entertainment

7.1

Food

7.3

Overall

7.7

Boarding

7.8

Crew

8.4

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 Virgin Atlantic, Delta, and KLM fly from Portsmouth to USA in about 16h 39m. The time it takes to get you to your destination can typically vary by up to 10h 26m. There are 3414 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 - Los Angeles, Southampton Eastleigh - New York John F Kennedy Intl or Southampton Eastleigh - Newark 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 (94%), Air Canada (88%) and Austrian Airlines (88%).

  • What are the cheapest flights from Portsmouth to USA?

    While on average a flight from Portsmouth to USA is generally £2,799, our data shows the cheapest flight currently is £338. When looking at the most popular route, (Southampton Eastleigh - Los Angeles), you can expect to pay £695 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 £89). Flying from Portsmouth to USA in December is currently the most expensive (average of £294). 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

Browse thousands of different options on Cheapflights for your next trip

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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 8 February 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£89Average£576FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapest£145Average£576FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£213Average£510FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
TAP AIR PORTUGALCheapest£222Average£465FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IberiaCheapest£235Average£563FlexibilityNo cancel feeOn-time77%
Search Iberia flights
FinnairCheapest£269Average£508FlexibilityNo cancel feeOn-time76%
Search Finnair flights
SWISSCheapest£273Average£469FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£279Average£478FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£280Average£495FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
PLAYCheapest£282Average£413FlexibilityNo cancel feeOn-timeN/A
Search PLAY 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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