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Cheap flights from Portsmouth to the United States from £326

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
18 Apr — 25 Apr1
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 19 March 2026.

Wed 29/409:20
SOU
-
EWR
3 stops32h 55m
Multiple Airlines
Wed 6/517:45
EWR
-
SOU
2 stops20h 45m
Multiple Airlines
Deal found 15/3£521
Wed 29/409:20
SOU
-
JFK
1 stop15h 00m
Aer Lingus
Wed 6/516:55
JFK
-
SOU
1 stop18h 55m
Aer Lingus
Deal found 15/3£540
Thu 30/409:20
SOU
-
JFK
3 stops35h 20m
Multiple Airlines
Thu 7/518:55
JFK
-
SOU
2 stops16h 55m
Multiple Airlines
Deal found 16/3£552
Tue 14/409:20
SOU
-
EWR
3 stops32h 55m
Multiple Airlines
Tue 21/417:15
EWR
-
SOU
2 stops21h 15m
Multiple Airlines
Deal found 15/3£571
Tue 14/409:05
SOU
-
JFK
1 stop10h 30m
KLM
Tue 21/418:15
JFK
-
SOU
1 stop17h 35m
KLM
Deal found 15/3£572
Mon 27/409:05
SOU
-
JFK
1 stop10h 30m
KLM
Mon 11/519:10
JFK
-
SOU
1 stop32h 25m
KLM
Deal found 17/3£579
Mon 27/409:20
SOU
-
JFK
1 stop15h 00m
Aer Lingus
Mon 11/516:55
JFK
-
SOU
1 stop10h 45m
Aer Lingus
Deal found 18/3£584
Mon 27/419:20
SOU
-
JFK
2 stops45h 05m
Multiple Airlines
Mon 11/516:55
JFK
-
SOU
1 stop10h 45m
Multiple Airlines
Deal found 17/3£588
Sat 2/520:05
SOU
-
EWR
1 stop29h 55m
Multiple Airlines
Sat 9/517:35
EWR
-
SOU
1 stop10h 00m
Multiple Airlines
Deal found 17/3£589
Tue 14/409:05
SOU
-
JFK
1 stop12h 58m
Delta
Tue 21/410:30
JFK
-
SOU
2 stops17h 05m
Delta
Deal found 15/3£590
Thu 30/409:20
SOU
-
EWR
1 stop11h 45m
Aer Lingus
Thu 7/517:35
EWR
-
SOU
1 stop18h 15m
Aer Lingus
Deal found 16/3£591
Thu 30/409:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Thu 7/516:55
JFK
-
SOU
1 stop18h 55m
Aer Lingus
Deal found 16/3£591

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 19 March 2026.

Round-trip from

£521

One-way from

£326

Popular in

July

Cheapest in

September

Average price

£409
29/4-6/5
  • 29/4-6/5
  • 5 total stops
  • 53h 40m total
  • Portsmouth to USA
Search Deals
15/9
  • 15/9
  • 3 total stops
  • 35h 35m total
  • Portsmouth to USA
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£21 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£6 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 19 March 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

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Wed 29/4

09:05-19:05

1 stop15h 00m

New York John F Kennedy Intl

Wed 6/5

09:49-08:35

2 stops17h 46m

£590

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Wed 29/4

09:05-21:20

2 stops17h 15m

New York LaGuardia

Wed 6/5

10:00-08:35

2 stops17h 35m

£593

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Tue 14/4

09:05-21:20

2 stops17h 15m

New York LaGuardia

Tue 21/4

11:40-08:35

2 stops15h 55m

£596

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Mon 27/4

09:05-21:06

2 stops17h 01m

New York LaGuardia

Mon 11/5

13:00-08:35

2 stops14h 35m

£602

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 27/4

09:05-21:57

2 stops17h 52m

New York John F Kennedy Intl

Mon 11/5

17:30-16:50

2 stops18h 20m

£602

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Wed 29/4

20:00-15:45

1 stop24h 45m

Washington, D.C. Dulles Intl

Wed 6/5

17:15-08:40

1 stop10h 25m

£619

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Tue 28/4

17:20-17:05

1 stop28h 45m

New York John F Kennedy Intl

Tue 12/5

16:40-08:35

1 stop10h 55m

£620

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Thu 30/4

17:20-18:30

1 stop30h 10m

Boston Logan Intl

Thu 7/5

12:55-08:35

2 stops14h 40m

£628

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Thu 30/4

09:05-22:19

2 stops18h 14m

New York LaGuardia

Thu 7/5

11:29-08:35

2 stops16h 06m

£628

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Fri 1/5

17:20-18:25

1 stop33h 05m

Los Angeles Los Angeles

Fri 8/5

20:10-08:35

1 stop28h 25m

£631

Flights are sorted by cheapest return flights first.

Deals found on 14/3

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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 £91). Flying from Portsmouth to USA in December is currently the most expensive (average of £284). 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 19 March 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 10% 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 14 March 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 19 March 2026.

The most flights from P0R to US0 are scheduled on a Wednesday (44 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 19 March 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
7.8
Good
1,472 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
KLM
7.8
Good
1,472 reviews
KLM
7.8
Good
1,472 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Virgin Atlantic
7.5
Good
682 reviews
KLM
7.8
Good
1,472 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas
Aer Lingus
7.2
Good
1,478 reviews
KLM
7.8
Good
1,472 reviews
Check prices

Overall

7.8

Crew

8.4

Food

7.3

Entertainment

7.1

Comfort

7.6

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

EZE - SCL

It was a short trip The aeroplane was delay I arrived in Chile late and I lost my fly with Qantas

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 Aer Lingus fly from Portsmouth to USA in about 15h. The time it takes to get you to your destination can typically vary by up to 9h 45m. 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 - New York John F Kennedy Intl, Southampton Eastleigh - Boston Logan 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 (97%), Fiji Airways (90%) and Malaysia Airlines (90%).

  • What are the cheapest flights from Portsmouth to USA?

    While on average a flight from Portsmouth to USA is generally £2,790, our data shows the cheapest flight currently is £372. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £558 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 £91). Flying from Portsmouth to USA in December is currently the most expensive (average of £284). 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 19 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest£75Average£112FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
JetBlueCheapest£91Average£589FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapest£148Average£594FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£193Average£549FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
TAP AIR PORTUGALCheapest£227Average£476FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IberiaCheapest£240Average£569FlexibilityNo cancel feeOn-time77%
Search Iberia flights
SWISSCheapest£279Average£495FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£288Average£491FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£301Average£522FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
PLAYCheapest£305Average£422FlexibilityNo 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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