Find flights
When to book
Airlines
FAQs

Cheap flights from Portsmouth to the United States from £311

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
6 Aug — 13 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 7 July 2026.

Tue 25/809:15
SOU
-
EWR
3 stops33h 00m
Multiple Airlines
Sun 30/817:45
EWR
-
SOU
3 stops33h 50m
Multiple Airlines
Deal found 5/7£514
Tue 25/809:15
SOU
-
JFK
1 stop18h 10m
Aer Lingus
Sun 30/816:55
JFK
-
SOU
1 stop10h 45m
Aer Lingus
Deal found 5/7£546
Wed 19/809:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Wed 26/816:55
JFK
-
SOU
1 stop10h 45m
Aer Lingus
Deal found 4/7£549
Wed 19/809:20
SOU
-
EWR
3 stops32h 55m
Multiple Airlines
Wed 26/817:45
EWR
-
SOU
2 stops20h 45m
Multiple Airlines
Deal found 4/7£561
Tue 25/809:15
SOU
-
JFK
2 stops18h 10m
Multiple Airlines
Sun 30/816:55
JFK
-
SOU
1 stop10h 45m
Multiple Airlines
Deal found 5/7£576
Tue 18/809:15
SOU
-
EWR
2 stops14h 01m
Multiple Airlines
Tue 25/820:25
EWR
-
SOU
3 stops31h 20m
Multiple Airlines
Deal found 5/7£581
Fri 28/809:20
SOU
-
BOS
1 stop10h 35m
Aer Lingus
Mon 31/821:15
BOS
-
SOU
1 stop14h 35m
Aer Lingus
Deal found 5/7£585
Tue 18/809:15
SOU
-
JFK
1 stop18h 10m
Aer Lingus
Tue 25/816:55
JFK
-
SOU
1 stop10h 10m
Aer Lingus
Deal found 4/7£588
Fri 28/818:05
SOU
-
BOS
2 stops25h 50m
Multiple Airlines
Mon 31/821:15
BOS
-
SOU
2 stops30h 30m
Multiple Airlines
Deal found 5/7£597
Sun 11/1009:15
SOU
-
LAX
1 stop13h 30m
Delta
Tue 20/1014:00
LAX
-
SOU
2 stops18h 50m
Delta
Deal found 4/7£612
Fri 28/809:20
SOU
-
MCO
1 stop13h 55m
Aer Lingus
Sun 6/919:59
MCO
-
SOU
1 stop18h 31m
Aer Lingus
Deal found 4/7£630
Mon 2/1108:40
SOU
-
LGA
2 stops17h 49m
Delta
Sun 8/1111:50
LGA
-
SOU
2 stops15h 20m
Delta
Deal found 3/7£634

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 7 July 2026.

Round-trip from

£514

One-way from

£311

Popular in

June

Cheapest in

September

Average price

£529
25/8-30/8
  • 25/8-30/8
  • 6 total stops
  • 66h 50m total
  • Portsmouth to USA
Search Deals
15/10
  • 15/10
  • 2 total stops
  • 40h 35m total
  • Portsmouth to USA
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£11 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 7 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

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 2/11

08:40-22:15

2 stops18h 35m

New York John F Kennedy Intl

Sun 8/11

10:30-08:10

2 stops16h 40m

£630

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Mon 2/11

08:40-21:29

2 stops17h 49m

New York LaGuardia

Sun 8/11

11:50-08:10

2 stops15h 20m

£634

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Sat 21/11

09:25-19:20

1 stop14h 55m

New York John F Kennedy Intl

Fri 27/11

22:45-17:00

1 stop13h 15m

£650

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Sat 21/11

09:25-19:20

1 stop14h 55m

New York John F Kennedy Intl

Fri 27/11

22:45-17:00

1 stop13h 15m

£656

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Tue 18/8

09:15-22:35

2 stops18h 20m

New York LaGuardia

Tue 25/8

11:35-10:15

2 stops17h 40m

£672

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Sat 21/11

09:25-20:15

2 stops15h 50m

New York LaGuardia

Fri 27/11

11:50-08:55

2 stops16h 05m

£680

SouthamptonOrlando

SOU - MCO

SOUMCO

Southampton Eastleigh

Mon 23/11

08:40-22:54

2 stops19h 14m

Orlando

Mon 30/11

17:15-17:00

2 stops18h 45m

£683

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Mon 26/10

17:30-12:45

1 stop26h 15m

San Francisco

Sun 1/11

13:50-08:10

1 stop34h 20m

£689

SouthamptonSan Francisco

SOU - SFO

SOUSFO

Southampton Eastleigh

Sun 25/10

17:30-12:45

1 stop26h 15m

San Francisco

Sun 1/11

13:50-08:10

1 stop34h 20m

£689

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Mon 17/8

20:40-21:00

2 stops29h 20m

Newark

Mon 24/8

17:35-08:40

1 stop10h 05m

£698

Flights are sorted by cheapest return flights first.

Deals found on 5/7

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 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 7 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 7 July 2026.

The most flights from P0R to US0 are scheduled on a Monday (53 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (49 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 4 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 7 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
1,648 reviews
Check prices

Overall

7.3

Food

6.6

Boarding

7.4

Comfort

7.2

Crew

8.1

Entertainment

7.0

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
1,648 reviews
Aer Lingus
7.3
Good
1,648 reviews
Check prices

Overall

7.3

Food

6.6

Boarding

7.4

Comfort

7.2

Crew

8.1

Entertainment

7.0

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 Delta, KLM, and British Airways fly from Portsmouth to USA in about 14h 55m. The time it takes to get you to your destination can typically vary by up to 3h 40m. 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 - Miami, Southampton Eastleigh - New York John F Kennedy 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 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 £3,020, our data shows the cheapest flight currently is £314. When looking at the most popular route, (Southampton Eastleigh - Miami), you can expect to pay £784 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

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
Heathrow to Vancouver Intl flights
Stansted to John F Kennedy Intl flights
Heathrow to Miami flights
Gatwick to Newark flights
London City to John F Kennedy Intl flights
Heathrow to Orlando flights
Heathrow to Pearson Intl flights
Heathrow to Los Angeles flights
Gatwick to LaGuardia flights
Luton to John F Kennedy Intl flights
Gatwick to Pearson Intl flights
Stansted to Newark flights
Luton to Newark flights
Heathrow to Mexico City flights
Gatwick to Vancouver Intl flights
London City to Newark flights
Heathrow to Boston flights
Manchester to Orlando flights
Gatwick to Miami flights
Heathrow to Dallas/Fort Worth flights
Heathrow to Toronto Island flights
Heathrow to Dulles Intl flights
Gatwick to Orlando flights
Manchester to John F Kennedy Intl flights
Stansted to Miami flights
London City to Miami flights
Heathrow to San Francisco flights
Heathrow to O'Hare Intl flights
Stansted to Orlando flights
Gatwick to Los Angeles flights
Stansted to Pearson Intl flights
London City to Pearson Intl flights
Stansted to Los Angeles flights
Luton to Miami flights
Heathrow to Las Vegas flights
Heathrow to Baltimore flights
Edinburgh to Newark flights
London City to Los Angeles flights
Heathrow to Cancún flights
Heathrow to Hobby flights
Gatwick to Cancún flights
London City to Vancouver Intl flights
London City to Orlando flights
Heathrow to Seattle flights
Gatwick to Boston flights
Luton to Pearson Intl 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 7 July 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£91Average£576FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
Air CanadaCheapest£117Average£542FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
DeltaCheapest£148Average£620FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IberiaCheapest£164Average£638FlexibilityNo cancel feeOn-time77%
Search Iberia flights
A.P.G.Cheapest£219Average£469FlexibilityNo cancel feeOn-timeN/A
Search A.P.G. flights
TAP AIR PORTUGALCheapest£226Average£489FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Norse Atlantic UKCheapest£256Average£474FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£289Average£462FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
SWISSCheapest£298Average£452FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Aer LingusCheapest£305Average£685FlexibilityNo 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.

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.