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Cheap flights from Portsmouth to the United States from £301

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 16/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
26 Apr — 3 May1
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 27 March 2026.

Sat 9/520:05
SOU
-
EWR
1 stop29h 55m
Multiple Airlines
Fri 5/623:00
EWR
-
SOU
1 stop15h 30m
Multiple Airlines
Deal found 24/3£453
Tue 5/509:20
SOU
-
EWR
1 stop11h 45m
British Airways
Tue 12/517:35
EWR
-
SOU
1 stop9h 30m
British Airways
Deal found 24/3£497
Mon 4/509:20
SOU
-
EWR
2 stops32h 55m
Multiple Airlines
Mon 18/517:45
EWR
-
SOU
2 stops20h 45m
Multiple Airlines
Deal found 27/3£500
Wed 15/409:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Mon 27/416:55
JFK
-
SOU
1 stop21h 35m
Aer Lingus
Deal found 24/3£514
Mon 20/420:00
SOU
-
EWR
1 stop25h 05m
British Airways
Mon 27/417:35
EWR
-
SOU
1 stop10h 05m
British Airways
Deal found 23/3£523
Tue 5/509:20
SOU
-
JFK
1 stop15h 00m
British Airways
Tue 12/516:55
JFK
-
SOU
1 stop10h 10m
British Airways
Deal found 24/3£527
Mon 4/509:20
SOU
-
JFK
1 stop15h 00m
British Airways
Mon 18/516:55
JFK
-
SOU
1 stop10h 45m
British Airways
Deal found 27/3£529
Mon 20/420:00
SOU
-
JFK
1 stop22h 40m
British Airways
Mon 27/421:05
JFK
-
SOU
1 stop17h 25m
British Airways
Deal found 23/3£537
Thu 23/420:00
SOU
-
EWR
1 stop25h 05m
British Airways
Mon 27/417:35
EWR
-
SOU
1 stop10h 05m
British Airways
Deal found 22/3£539
Sun 10/509:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Sun 17/523:55
JFK
-
SOU
1 stop11h 55m
Aer Lingus
Deal found 26/3£549
Mon 11/519:20
SOU
-
BOS
1 stop30h 45m
Multiple Airlines
Mon 18/523:00
BOS
-
SOU
2 stops28h 05m
Multiple Airlines
Deal found 27/3£555
Thu 7/509:20
SOU
-
JFK
2 stops31h 59m
British Airways
Mon 11/523:55
JFK
-
SOU
1 stop14h 35m
British Airways
Deal found 26/3£557

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 27 March 2026.

Round-trip from

£453

One-way from

£301

Popular in

July

Cheapest in

September

Average price

£408
9/5-5/6
  • 9/5-5/6
  • 2 total stops
  • 45h 25m total
  • Portsmouth to USA
Search Deals
16/4
  • 16/4
  • 3 total stops
  • 40h 00m 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 (£7 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 27 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

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Thu 23/4

20:00-16:05

1 stop25h 05m

Newark

Mon 27/4

17:35-08:40

1 stop10h 05m

£539

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Thu 7/5

09:20-12:19

2 stops31h 59m

New York John F Kennedy Intl

Mon 11/5

23:55-19:30

1 stop14h 35m

£557

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Fri 17/4

20:00-22:25

1 stop31h 25m

New York John F Kennedy Intl

Tue 21/4

21:05-19:30

1 stop17h 25m

£571

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Wed 22/4

09:05-16:25

1 stop12h 20m

Boston Logan Intl

Wed 29/4

20:25-08:35

1 stop31h 10m

£593

SouthamptonOrlando

SOU - MCO

SOUMCO

Southampton Eastleigh

Mon 11/5

09:05-00:55

2 stops20h 50m

Orlando

Mon 18/5

06:00-08:35

2 stops21h 35m

£614

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Mon 4/5

09:05-21:20

2 stops17h 15m

New York LaGuardia

Mon 18/5

11:54-08:35

2 stops15h 41m

£618

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Tue 5/5

09:05-21:20

2 stops17h 15m

New York LaGuardia

Tue 12/5

09:35-08:35

2 stops18h 00m

£619

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Wed 22/4

12:35-22:25

2 stops14h 50m

New York John F Kennedy Intl

Sun 26/4

07:50-12:05

2 stops23h 15m

£620

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Thu 7/5

17:20-13:16

1 stop24h 56m

Boston Logan Intl

Thu 14/5

16:35-08:35

1 stop11h 00m

£624

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Mon 20/4

17:20-15:48

2 stops27h 28m

New York LaGuardia

Mon 27/4

12:00-08:35

2 stops15h 35m

£625

Flights are sorted by cheapest return flights first.

Deals found on 23/3

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 £283). 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 27 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 at midday.

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 23 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.

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 27 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
1,477 reviews
Check prices

Overall

7.8

Food

7.3

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.6

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
1,477 reviews
KLM
7.8
Good
1,477 reviews
Check prices

Overall

7.8

Food

7.3

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.6

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
685 reviews
KLM
7.8
Good
1,477 reviews
Check prices

Overall

7.8

Food

7.3

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.6

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
1,491 reviews
KLM
7.8
Good
1,477 reviews
Check prices

Overall

7.8

Food

7.3

Boarding

7.8

Crew

8.4

Entertainment

7.1

Comfort

7.6

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 British Airways, KLM, and Delta fly from Portsmouth to USA in about 12h 20m. The time it takes to get you to your destination can typically vary by up to 12h 45m. 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 - Los Angeles 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 £2,789, our data shows the cheapest flight currently is £374. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £527 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 £283). 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 27 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest£75Average£112FlexibilityNo cancel feeOn-time65%
Search Spirit Airlines flights
JetBlueCheapest£91Average£554FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapest£148Average£597FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
Air CanadaCheapest£193Average£533FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
TAP AIR PORTUGALCheapest£226Average£477FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IberiaCheapest£240Average£571FlexibilityNo cancel feeOn-time77%
Search Iberia flights
SWISSCheapest£279Average£496FlexibilityNo cancel feeOn-time79%
Search SWISS flights
IcelandairCheapest£285Average£488FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£305Average£681FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
PLAYCheapest£309Average£428FlexibilityNo 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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