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Cheap flights from Portsmouth to the United States from £292

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 15/10. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
13 Aug — 20 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 14 July 2026.

Tue 3/1120:00
SOU
-
EWR
3 stops46h 25m
Multiple Airlines
Mon 16/1118:30
EWR
-
SOU
2 stops20h 00m
Multiple Airlines
Deal found 13/7£459
Tue 6/1009:15
SOU
-
JFK
2 stops36h 45m
Multiple Airlines
Thu 15/1017:10
JFK
-
SOU
2 stops21h 20m
Multiple Airlines
Deal found 13/7£461
Tue 6/1009:15
SOU
-
EWR
3 stops33h 00m
Multiple Airlines
Thu 15/1017:20
EWR
-
SOU
2 stops21h 10m
Multiple Airlines
Deal found 13/7£472
Tue 6/1009:15
SOU
-
EWR
3 stops33h 00m
Multiple Airlines
Tue 3/1117:40
EWR
-
SOU
2 stops20h 50m
Multiple Airlines
Deal found 13/7£500
Tue 3/1120:00
SOU
-
JFK
1 stop28h 25m
Aer Lingus
Mon 16/1117:00
JFK
-
SOU
1 stop10h 40m
Aer Lingus
Deal found 13/7£523
Mon 24/809:20
SOU
-
JFK
3 stops35h 20m
Multiple Airlines
Mon 31/817:10
JFK
-
SOU
2 stops21h 20m
Multiple Airlines
Deal found 11/7£525
Mon 31/820:00
SOU
-
JFK
2 stops21h 40m
Multiple Airlines
Tue 15/921:30
JFK
-
SOU
1 stop14h 20m
Multiple Airlines
Deal found 12/7£528
Tue 3/1120:00
SOU
-
EWR
1 stop25h 15m
Aer Lingus
Mon 16/1117:45
EWR
-
SOU
1 stop20h 45m
Aer Lingus
Deal found 13/7£534
Tue 6/1009:15
SOU
-
JFK
2 stops15h 05m
Multiple Airlines
Tue 3/1119:25
JFK
-
SOU
2 stops19h 05m
Multiple Airlines
Deal found 13/7£535
Tue 6/1009:15
SOU
-
JFK
1 stop18h 10m
Aer Lingus
Thu 15/1023:55
JFK
-
SOU
1 stop11h 55m
Aer Lingus
Deal found 13/7£550
Wed 26/809:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Wed 2/923:55
JFK
-
SOU
1 stop11h 55m
Aer Lingus
Deal found 12/7£575
Mon 31/819:20
SOU
-
EWR
2 stops30h 40m
Multiple Airlines
Tue 15/920:25
EWR
-
SOU
2 stops18h 05m
Multiple Airlines
Deal found 12/7£580

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 14 July 2026.

Round-trip from

£459

One-way from

£292

Popular in

June

Cheapest in

September

Average price

£555
3/11-16/11
  • 3/11-16/11
  • 5 total stops
  • 66h 25m total
  • Portsmouth to USA
Search Deals
15/10
  • 15/10
  • 3 total stops
  • 38h 30m total
  • Portsmouth to USA
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£69 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 July 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 14 July 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
Fastest return journey

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Tue 25/8

09:15-14:55

1 stop10h 40m

Boston Logan Intl

Tue 1/9

17:25-08:05

1 stop9h 40m

£597

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Tue 6/10

09:05-19:15

1 stop15h 10m

New York John F Kennedy Intl

Tue 3/11

10:30-08:10

2 stops16h 40m

£610

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Tue 6/10

09:05-21:34

2 stops17h 29m

New York LaGuardia

Wed 11/11

18:00-17:00

2 stops18h 00m

£613

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Sun 11/10

09:15-14:45

1 stop13h 30m

Los Angeles Los Angeles

Tue 20/10

14:00-16:50

2 stops18h 50m

£614

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Tue 3/11

08:40-19:34

2 stops15h 54m

New York LaGuardia

Mon 16/11

18:00-17:00

2 stops18h 00m

£615

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Tue 3/11

08:40-19:29

2 stops15h 49m

Newark

Mon 16/11

09:40-08:10

2 stops17h 30m

£615

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Mon 31/8

09:05-20:30

2 stops16h 25m

New York LaGuardia

Tue 15/9

13:00-08:45

2 stops14h 45m

£615

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Thu 27/8

09:15-16:37

1 stop12h 22m

Boston Logan Intl

Thu 3/9

09:05-08:35

2 stops18h 30m

£616

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Tue 6/10

09:05-21:34

2 stops17h 29m

New York LaGuardia

Tue 3/11

09:10-08:10

2 stops18h 00m

£619

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 21/8

20:00-09:05

2 stops42h 05m

Boston Logan Intl

Fri 28/8

23:40-19:30

1 stop14h 50m

£621

Flights are sorted by cheapest return flights first.

Deals found on 14/7

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 14 July 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 14 July 2026.

The most flights from P0R to US0 are scheduled on a Saturday (55 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (50 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 11 July 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. Tuesday 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 14 July 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
1,666 reviews
Check prices

Food

6.6

Entertainment

7.0

Boarding

7.4

Overall

7.3

Crew

8.1

Comfort

7.2

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
1,666 reviews
Aer Lingus
7.3
Good
1,666 reviews
Check prices

Food

6.6

Entertainment

7.0

Boarding

7.4

Overall

7.3

Crew

8.1

Comfort

7.2

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 Aer Lingus, Delta, and KLM fly from Portsmouth to USA in about 10h 40m. The time it takes to get you to your destination can typically vary by up to 14h 15m. There are 3228 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 Air Canada (89%), Austrian Airlines (89%) and United Airlines (89%).

  • What are the cheapest flights from Portsmouth to USA?

    While on average a flight from Portsmouth to USA is generally £3,030, our data shows the cheapest flight currently is £311. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £461 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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London City to Pearson Intl flights
Heathrow to Toronto Island flights
Stansted to Pearson Intl flights
Heathrow to San Francisco flights
Manchester to Orlando flights
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Heathrow to Dulles Intl flights
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Manchester to LaGuardia flights
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Heathrow to Hobby flights
Gatwick to Boston flights
Stansted to Orlando flights
Stansted to Atlanta flights
Stansted to Los Angeles flights
Heathrow to Baltimore flights
London City to Los Angeles flights
Luton to Pearson Intl flights
Heathrow to Cancún flights
London City to Atlanta flights

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 14 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£117Average£562FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£148Average£621FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IberiaCheapest£164Average£638FlexibilityNo cancel feeOn-time77%
Search Iberia flights
TAP AIR PORTUGALCheapest£226Average£490FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Norse Atlantic UKCheapest£264Average£462FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£288Average£444FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£298Average£466FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£309Average£687FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Scandinavian AirlinesCheapest£312Average£533FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Hahn AirCheapest£319Average£527FlexibilityNo cancel feeOn-timeN/A
Search Hahn Air 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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