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Cheap flights from Portsmouth to the United States from £314

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
11 Jan — 18 Jan1
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 12 December 2025.

Sun 28/1209:30SOU - JFK
2 stops26h 59mDelta
Tue 17/318:45JFK - SOU
1 stop9h 25mDelta
Deal found 11/12£669
Wed 24/1217:30SOU - JFK
1 stop23h 00mDelta
Thu 8/117:45JFK - SOU
1 stop9h 40mDelta
Deal found 10/12£689
Sun 28/1209:30SOU - JFK
2 stops38h 14mDelta
Sun 15/317:40JFK - SOU
1 stop10h 40mDelta
Deal found 11/12£699
Fri 26/1217:30SOU - JFK
1 stop23h 00mDelta
Mon 16/318:45JFK - SOU
1 stop9h 20mDelta
Deal found 11/12£703
Sun 28/1209:30SOU - JFK
2 stops26h 59mDelta
Wed 18/318:45JFK - SOU
1 stop9h 35mDelta
Deal found 9/12£704
Mon 29/1218:05SOU - JFK
1 stop24h 10mDelta
Mon 16/317:40JFK - SOU
1 stop10h 25mDelta
Deal found 9/12£716
Mon 29/1208:40SOU - JFK
2 stops27h 49mDelta
Wed 18/308:53JFK - SOU
2 stops28h 32mDelta
Deal found 9/12£717
Wed 24/1217:30SOU - JFK
1 stop23h 00mDelta
Fri 9/117:45JFK - SOU
1 stop10h 00mDelta
Deal found 10/12£719
Sun 28/1209:30SOU - JFK
2 stops26h 59mDelta
Thu 8/117:45JFK - SOU
1 stop9h 40mDelta
Deal found 10/12£731
Fri 26/1217:30SOU - JFK
1 stop23h 00mDelta
Fri 13/318:45JFK - SOU
1 stop10h 05mDelta
Deal found 11/12£733
Fri 26/1217:30SOU - JFK
2 stops30h 14mDelta
Sat 14/311:18JFK - SOU
2 stops17h 32mDelta
Deal found 9/12£733
Thu 18/1208:50SOU - LAX
2 stops33h 55mDelta
Wed 31/1208:25LAX - SOU
2 stops25h 00mDelta
Deal found 12/12£935

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 12 December 2025.

Round-trip from

£457

One-way from

£314

Popular in

July

Cheapest in

September

Average price

£473
22/1-29/1
  • 22/1-29/1
  • 5 total stops
  • 47h 30m total
  • Portsmouth to USA
Search Deals
8/6
  • 8/6
  • 2 total stops
  • 32h 10m total
  • Portsmouth to USA
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£25 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 December 2025
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 12 December 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 2/2

19:55-22:00

1 stop31h 05m

New York John F Kennedy Intl

Mon 16/2

21:00-11:55

1 stop9h 55m

£476

SouthamptonFort Lauderdale

SOU - FLL

SOUFLL

Southampton Eastleigh

Thu 12/3

08:50-21:14

2 stops16h 24m

Fort Lauderdale

Mon 23/3

20:45-17:00

2 stops16h 15m

£479

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Thu 26/3

18:05-14:20

1 stop24h 15m

Boston Logan Intl

Sun 12/4

18:40-16:50

1 stop17h 10m

£491

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 27/3

08:40-19:55

1 stop15h 15m

Boston Logan Intl

Sat 11/4

16:45-08:45

1 stop11h 00m

£491

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 27/3

08:40-19:55

1 stop15h 15m

Boston Logan Intl

Sun 12/4

20:25-16:50

1 stop15h 25m

£491

SouthamptonFort Lauderdale

SOU - FLL

SOUFLL

Southampton Eastleigh

Fri 15/5

09:05-20:27

2 stops16h 22m

Fort Lauderdale

Sat 23/5

11:10-08:45

2 stops16h 35m

£496

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Mon 30/3

17:20-13:35

1 stop25h 15m

Boston Logan Intl

Sun 12/4

18:40-16:50

1 stop17h 10m

£496

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 29/3

09:15-18:30

1 stop14h 15m

Boston Logan Intl

Sat 11/4

16:45-08:45

1 stop11h 00m

£496

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Mon 30/3

09:05-16:30

1 stop12h 25m

Boston Logan Intl

Sat 11/4

05:25-08:45

2 stops22h 20m

£498

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Sun 29/3

09:15-18:30

1 stop14h 15m

Boston Logan Intl

Sun 12/4

09:05-08:35

2 stops18h 30m

£498

Flights are sorted by cheapest return flights first.

Deals found on 9/12

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 £90). Flying from Portsmouth to USA in August is currently the most expensive (average of £292). 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 12 December 2025.

A simple way to save on the total cost of your ticket is to fly from Portsmouth to USA at midday. 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 morning.

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 16 December 2024.

Travellers seeking maximum savings on their Portsmouth to USA flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday mornings 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 12 December 2025.

The most flights from P0R to US0 are scheduled on a Monday (50 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (44 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 12 December 2025.
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
1,432 reviews
Check prices

Food

7.2

Comfort

7.6

Crew

8.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,432 reviews
KLM
7.7
Good
1,432 reviews
Check prices

Food

7.2

Comfort

7.6

Crew

8.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Virgin Atlantic
7.5
Good
675 reviews
KLM
7.7
Good
1,432 reviews
Check prices

Food

7.2

Comfort

7.6

Crew

8.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Aer Lingus
7.2
Good
1,394 reviews
KLM
7.7
Good
1,432 reviews
Check prices

Food

7.2

Comfort

7.6

Crew

8.3

Boarding

7.8

Entertainment

7.1

Overall

7.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 Delta, Virgin Atlantic, and Aer Lingus fly from Portsmouth to USA in about 16h 24m. The time it takes to get you to your destination can typically vary by up to 6h 31m. There are 4362 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 - Boston Logan Intl 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 (89%), Air Canada (85%) and Austrian Airlines (85%).

  • What are the cheapest flights from Portsmouth to USA?

    While on average a flight from Portsmouth to USA is generally £2,638, our data shows the cheapest flight currently is £366. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £475 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 £90). Flying from Portsmouth to USA in August is currently the most expensive (average of £292). 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 12 December 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£90Average£591FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£216Average£530FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£238Average£590FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
PLAYCheapest£250Average£418FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
TAP AIR PORTUGALCheapest£279Average£464FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
SWISSCheapest£292Average£445FlexibilityNo cancel feeOn-time79%
Search SWISS flights
United AirlinesCheapest£296Average£518FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
IcelandairCheapest£297Average£525FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£297Average£529FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£304Average£666FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus 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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