Find flights
When to book
Airlines
FAQs

Cheap flights from Portsmouth to the United States from £201

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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
1 Apr — 8 Apr1
1 adult

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 27 March 2025.

Round-trip from

£420

One-way from

£201

Popular in

August

Cheapest in

January

Average price

£376
KLM
  • KLM
  • 5/5-19/5
  • 2 total stops
  • 35h 15m total
  • Portsmouth to USA
Search Deals
9/5
  • 9/5
  • 1 total stop
  • 30h 35m total
  • Portsmouth to USA
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£32 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Portsmouth to USA

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 2025.

Mon 5/509:20SOU - JFK
1 stop18h 30mKLM
Mon 19/519:15JFK - SOU
1 stop16h 45mKLM
Deal found 27/3£420
Mon 5/509:20SOU - JFK
2 stops17h 47mVirgin Atlantic
Mon 19/519:15JFK - SOU
1 stop16h 45mVirgin Atlantic
Deal found 27/3£424
Sun 11/509:20SOU - LGA
2 stops17h 02mDelta
Sun 18/511:55LGA - SOU
2 stops15h 50mDelta
Deal found 27/3£428
Sun 11/518:25SOU - BOS
1 stop27h 00mKLM
Sun 18/520:15BOS - SOU
1 stop31h 35mKLM
Deal found 27/3£432
Mon 2/619:25SOU - EWR
1 stop30h 35mMultiple Airlines
Thu 26/623:00EWR - SOU
1 stop11h 40mMultiple Airlines
Deal found 26/3£432
Mon 5/509:40SOU - JFK
3 stops35h 00mMultiple Airlines
Mon 19/518:55JFK - SOU
2 stops19h 35mMultiple Airlines
Deal found 27/3£458
Sun 11/509:20SOU - BOS
1 stop12h 05mDelta
Sun 18/520:45BOS - SOU
2 stops15h 15mDelta
Deal found 27/3£465
Mon 7/417:35SOU - JFK
1 stop24h 35mDelta
Tue 15/407:15JFK - SOU
2 stops20h 30mDelta
Deal found 27/3£523
Thu 24/409:40SOU - IAD
2 stops14h 40mMultiple Airlines
Tue 29/420:30IAD - SOU
2 stops18h 00mMultiple Airlines
Deal found 27/3£556
Mon 28/417:35SOU - SFO
1 stop26h 10mDelta
Mon 19/513:45SFO - SOU
1 stop19h 15mDelta
Deal found 26/3£561
Sun 11/509:10SOU - EWR
1 stop11h 50mAer Lingus
Sun 18/517:30EWR - SOU
1 stop10h 40mAer Lingus
Deal found 27/3£564
Fri 9/520:00SOU - JFK
2 stops26h 15mAer Lingus
Fri 16/516:55JFK - SOU
1 stop17h 50mAer Lingus
Deal found 27/3£575

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 2025.
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

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 5/5

09:20-22:50

1 stop18h 30m

New York John F Kennedy Intl

Mon 19/5

19:15-17:00

1 stop16h 45m

£420

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 5/5

09:20-22:07

2 stops17h 47m

New York John F Kennedy Intl

Mon 19/5

19:15-17:00

1 stop16h 45m

£424

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Sun 11/5

09:20-21:22

2 stops17h 02m

New York LaGuardia

Sun 18/5

11:55-08:45

2 stops15h 50m

£428

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Mon 2/6

19:25-21:00

1 stop30h 35m

Newark

Thu 26/6

23:00-15:40

1 stop11h 40m

£432

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 11/5

18:25-16:25

1 stop27h 00m

Boston Logan Intl

Sun 18/5

20:15-08:50

1 stop31h 35m

£432

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 5/5

09:40-15:40

3 stops35h 00m

New York John F Kennedy Intl

Mon 19/5

18:55-19:30

2 stops19h 35m

£458

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 11/5

09:20-16:25

1 stop12h 05m

Boston Logan Intl

Sun 18/5

20:45-17:00

2 stops15h 15m

£465

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 7/4

17:35-13:10

1 stop24h 35m

New York John F Kennedy Intl

Tue 15/4

07:15-08:45

2 stops20h 30m

£523

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 24/4

09:40-19:20

2 stops14h 40m

Washington, D.C. Dulles Intl

Tue 29/4

20:30-19:30

2 stops18h 00m

£556

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 28/4

17:35-11:45

1 stop26h 10m

San Francisco

Mon 19/5

13:45-17:00

1 stop19h 15m

£561

Flights are sorted by cheapest return flights first.

Deals found on 26/3

Showing 1-10 of 60 results
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, January is the cheapest month in which you can book a flight from Portsmouth to USA (average of £575). Flying from Portsmouth to USA in July is currently the most expensive (average of £811). 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 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to USA as you normally would.

Rainfall in USA by month

Plan your trip to USA by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in USA ranges from 71.0 - 114.0 inches per month. July is typically the wettest month, when rainfall can reach 114.0 mm. February is typically the driest time to visit USA when rainfall is around 71.0 mm.

Temperature in USA by month

Plan your trip to USA by taking into account the average temperature totals by month.

If weather is an important factor for your trip to USA, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 25.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 1.0 C).

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 2025.
Read through reviews of airlines operating flights from Portsmouth to USA, such as Delta, KLM and Air France. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very Good
7,895 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
KLM
7.8
Good
1,321 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Air France
7.4
Good
1,424 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Virgin Atlantic
7.4
Good
634 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Aer Lingus
7.0
Good
1,062 reviews
Delta
8.0
Very Good
7,895 reviews
Check prices

Crew

8.5

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

  • What are the cheapest airlines to fly from Portsmouth to USA one-way?

    One-way options have recently been found by users for as low as £404 on Aer Lingus. Other airlines that offer cheap prices include Delta from £1,091 and KLM from £1,130 one-way.

  • What are the most popular routes from Portsmouth to USA?

    Most travelers choose Southampton Eastleigh - New York John F Kennedy Intl, Southampton Eastleigh - Chicago O'Hare Intl or Southampton Eastleigh - Miami 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 (96%), Fiji Airways (92%) and Malaysia Airlines (92%).

  • What are the cheapest flights from Portsmouth to USA?

    While on average a flight from Portsmouth to USA is generally £1,996, our data shows the cheapest flight currently is £383. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), 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, January is the cheapest month in which you can book a flight from Portsmouth to USA (average of £575). Flying from Portsmouth to USA in July is currently the most expensive (average of £811). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portsmouth to USA

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to John F Kennedy Intl flights
Heathrow to Newark flights
Gatwick to John F Kennedy Intl flights
Heathrow to LaGuardia flights
London City to John F Kennedy Intl flights
Gatwick to Newark flights
Heathrow to Vancouver Intl flights
London City to Newark flights
Stansted to Stewart flights
Heathrow to Pearson Intl flights
Heathrow to Los Angeles flights
Heathrow to Miami flights
Heathrow to Orlando flights
Gatwick to LaGuardia flights
Stansted to John F Kennedy Intl flights
Heathrow to Boston flights
Luton to John F Kennedy Intl flights
Gatwick to Pearson Intl flights
Gatwick to Vancouver Intl flights
Heathrow to San Francisco flights
Heathrow to Las Vegas flights
Heathrow to Mexico City flights
Gatwick to Cancún flights
Heathrow to Cancún flights
Heathrow to Dallas/Fort Worth flights
Heathrow to Dulles Intl flights
Stansted to Newark flights
Heathrow to Toronto Island flights
Heathrow to O'Hare Intl flights
Heathrow to Baltimore flights
Gatwick to Orlando flights
London City to Pearson Intl flights
London City to Los Angeles flights
Manchester to Orlando flights
London City to Vancouver Intl flights
Heathrow to Hobby flights
Heathrow to Seattle flights
Manchester to John F Kennedy Intl flights
London City to Miami flights
Gatwick to Boston flights
Heathrow to Calgary flights
Gatwick to Los Angeles flights
Gatwick to Miami flights
Heathrow to Atlanta flights
London City to Orlando flights
Luton to Newark flights
Luton to Stewart flights
Heathrow to George Bush Intcntl flights
Heathrow to Pierre Elliott Trudeau Intl flights
London City to Cancún 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 27 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest£8Average£564FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
DeltaCheapest£247Average£640FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
PLAYCheapest£272Average£429FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
Air CanadaCheapest£289Average£513FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
TAP AIR PORTUGALCheapest£291Average£469FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
IcelandairCheapest£304Average£582FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
United AirlinesCheapest£309Average£604FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest£321Average£654FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Scandinavian AirlinesCheapest£321Average£542FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
SWISSCheapest£326Average£490FlexibilityNo cancel feeOn-time79%
Search SWISS 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.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.