How long is the flight from Portsmouth to USA?

Airlines like Aer Lingus, British Airways, and Delta fly from Portsmouth to USA in about 12h 09m. The time it takes to get you to your destination can typically vary by up to 8h 08m. 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.

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.

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).

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 - Miami when deciding on the best route from Portsmouth to USA.

What are the cheapest flights from Portsmouth to USA?

While on average a flight from Portsmouth to USA is generally £2,274, our data shows the cheapest flight currently is £319. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £434 for that flight.

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 (92%), Malaysia Airlines (92%) and Fiji Airways (88%).

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.

£274+ Cheap Flights from Portsmouth to the United States

Cheap flight deals from Portsmouth to USA

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

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 1 September 2026.

Sun 11/1009:20 -

1 stop18h 05m

Sun 25/1018:00 -

1 stop10h 50m

Deal found 1/9£445

Mon 28/909:20 -

1 stop18h 05m

Mon 5/1023:55 -

1 stop14h 35m

Deal found 31/8£446

Mon 5/1009:20 -

1 stop18h 05m

Tue 20/1023:55 -

1 stop14h 35m

Deal found 28/8£447

Thu 15/1009:20 -

1 stop18h 05m

Thu 22/1023:55 -

1 stop11h 55m

Deal found 31/8£453

Mon 5/1009:20 -

1 stop11h 45m

Tue 20/1017:35 -

1 stop9h 30m

Deal found 31/8£454

Tue 13/1009:15 -

1 stop15h 05m

Tue 20/1023:55 -

1 stop14h 35m

Deal found 29/8£456

Mon 5/1009:20 -

2 stops36h 40m

Tue 20/1017:10 -

2 stops21h 20m

Deal found 28/8£463

Tue 13/1009:15 -

1 stop11h 50m

Tue 20/1017:35 -

1 stop9h 30m

Deal found 29/8£465

Thu 15/1009:20 -

1 stop11h 45m

Thu 22/1017:35 -

1 stop18h 15m

Deal found 31/8£470

Tue 13/1009:15 -

1 stop15h 05m

Tue 20/1016:55 -

1 stop10h 10m

Deal found 29/8£475

Thu 15/1009:05 -

1 stop15h 10m

Thu 22/1013:15 -

2 stops14h 20m

Deal found 31/8£476

Mon 5/1009:20 -

1 stop15h 00m

Tue 20/1021:05 -

1 stop17h 25m

Deal found 28/8£480

Best flights from Portsmouth to USA
Discover carefully curated flight deals from Portsmouth to USA that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.

Mon 28/909:20 -

1 stop18h 05m

Mon 5/1023:55 -

1 stop14h 35m

Deal found 31/8£446

Sat 7/1109:20 -

1 stop12h 09m

Mon 16/1117:00 -

1 stop10h 40m

Deal found 31/8£483

Wed 28/1008:40 -

2 stops34h 15m

Sun 1/1117:15 -

1 stop13h 40m

Deal found 28/8£527

Thu 15/1009:05 -

1 stop13h 40m

Thu 22/1007:35 -

2 stops17h 00m

Deal found 1/9£534

Thu 29/1017:35 -

1 stop27h 20m

Thu 5/1117:45 -

1 stop18h 20m

Deal found 29/8£656

Thu 29/1017:20 -

2 stops35h 22m

Thu 5/1112:20 -

2 stops14h 50m

Deal found 1/9£680

Sat 7/1109:20 -

1 stop11h 50m

Mon 16/1117:40 -

1 stop10h 00m

Deal found 31/8£483

Tue 27/1009:20 -

1 stop14h 45m

Sat 31/1018:15 -

1 stop10h 30m

Deal found 1/9£521

Sat 27/209:20 -

1 stop11h 50m

Sat 20/318:40 -

1 stop10h 00m

Deal found 29/8£484

Sun 11/1009:15 -

1 stop32h 18m

Tue 27/1010:20 -

2 stops17h 50m

Deal found 29/8£534

Thu 1/1009:20 -

2 stops14h 30m

Mon 5/1020:50 -

2 stops17h 40m

Deal found 29/8£558

Mon 28/909:20 -

1 stop17h 05m

Mon 19/1020:10 -

1 stop15h 20m

Deal found 31/8£485

Mon 12/1009:05 -

2 stops20h 17m

Mon 19/1009:59 -

2 stops22h 51m

Deal found 1/9£537

Mon 19/1009:20 -

1 stop15h 00m

Tue 3/1119:25 -

1 stop19h 05m

Deal found 29/8£485

Thu 1/1009:05 -

1 stop12h 31m

Mon 5/1009:20 -

2 stops18h 15m

Deal found 29/8£562

Thu 15/1020:00 -

2 stops22h 30m

Thu 22/1016:55 -

2 stops17h 55m

Deal found 31/8£636

Fri 26/209:20 -

1 stop15h 09m

Fri 19/318:00 -

1 stop10h 40m

Deal found 28/8£485

Tue 29/909:15 -

1 stop18h 10m

Sun 4/1016:55 -

1 stop18h 55m

Deal found 31/8£485

Thu 15/1009:05 -

2 stops19h 45m

Thu 22/1007:20 -

2 stops20h 15m

Deal found 30/8£638

Sun 11/1009:20 -

1 stop18h 05m

Tue 27/1018:00 -

1 stop10h 40m

Deal found 29/8£485

Mon 28/909:05 -

2 stops19h 30m

Mon 5/1011:05 -

2 stops16h 30m

Deal found 31/8£638

Sat 21/1109:20 -

1 stop15h 09m

Wed 25/1117:00 -

1 stop18h 35m

Deal found 28/8£485

Wed 14/1009:15 -

2 stops19h 35m

Wed 21/1015:51 -

2 stops19h 59m

Deal found 1/9£638

Mon 28/909:20 -

1 stop11h 45m

Mon 19/1017:35 -

1 stop10h 05m

Deal found 31/8£485

Fri 25/909:05 -

2 stops19h 30m

Fri 2/1007:05 -

2 stops20h 40m

Deal found 28/8£640

Sun 11/1009:20 -

1 stop11h 45m

Tue 27/1018:40 -

1 stop10h 00m

Deal found 29/8£485

Tue 29/909:15 -

1 stop11h 50m

Sun 4/1017:35 -

1 stop10h 05m

Deal found 31/8£485

Thu 29/1008:40 -

1 stop12h 05m

Thu 5/1111:10 -

2 stops16h 00m

Deal found 31/8£655

Sat 21/1109:20 -

1 stop11h 50m

Wed 25/1117:40 -

1 stop17h 55m

Deal found 28/8£485

Tue 13/1020:00 -

2 stops33h 49m

Tue 20/1014:08 -

2 stops23h 22m

Deal found 28/8£1,145

Find flight deals from Portsmouth to USA

Round-trip from	£445
One-way from	£274
Popular in	July
Cheapest in	February
Average price	£385

Aer Lingus
11/10-25/10
2 total stops
28h 55m total
Portsmouth to USA

Search Deals

30/10
2 total stops
29h 55m total
Portsmouth to USA

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£80 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

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 Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Mon 28/9

09:20-22:25

1 stop18h 05m

New York John F Kennedy Intl

Mon 5/10

23:55-19:30

1 stop14h 35m

£446

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Sat 7/11

09:20-16:29

1 stop12h 09m

New York John F Kennedy Intl

Mon 16/11

17:00-08:40

1 stop10h 40m

£483

SouthamptonNewark

SOU Southampton Eastleigh - EWR Newark

SOUEWR

Southampton Eastleigh

Sat 7/11

09:20-16:10

1 stop11h 50m

Newark

Mon 16/11

17:40-08:40

1 stop10h 00m

£483

SouthamptonNewark

SOU Southampton Eastleigh - EWR Newark

SOUEWR

Southampton Eastleigh

Sat 27/2

09:20-16:10

1 stop11h 50m

Newark

Sat 20/3

18:40-08:40

1 stop10h 00m

£484

SouthamptonLos Angeles

SOU Southampton Eastleigh - LAX Los Angeles Los Angeles

SOULAX

Southampton Eastleigh

Mon 28/9

09:20-18:25

1 stop17h 05m

Los Angeles Los Angeles

Mon 19/10

20:10-19:30

1 stop15h 20m

£485

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Mon 19/10

09:20-19:20

1 stop15h 00m

New York John F Kennedy Intl

Tue 3/11

19:25-19:30

1 stop19h 05m

£485

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Fri 26/2

09:20-19:29

1 stop15h 09m

New York John F Kennedy Intl

Fri 19/3

18:00-08:40

1 stop10h 40m

£485

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Tue 29/9

09:15-22:25

1 stop18h 10m

New York John F Kennedy Intl

Sun 4/10

16:55-16:50

1 stop18h 55m

£485

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Sun 11/10

09:20-22:25

1 stop18h 05m

New York John F Kennedy Intl

Tue 27/10

18:00-08:40

1 stop10h 40m

£485

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Sat 21/11

09:20-19:29

1 stop15h 09m

New York John F Kennedy Intl

Wed 25/11

17:00-16:35

1 stop18h 35m

£485

Flights are sorted by cheapest return flights first.

Deals found on 27/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

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.

SOU-JFK

SOU-EWR

SOU-IAD

SOU-SFO

SOU-ORD

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

P0R-US0

SOU-JFK

SOU-EWR

SOU-IAD

SOU-SFO

What is the cheapest time of day to fly from P0R to US?

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 13% on your trip compared to booking a flight in the evening.

Weekly flight availability from Portsmouth to USA

The most flights from P0R to US0 are scheduled on a Monday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (39 on average).

What is the cheapest day to fly from Portsmouth to USA?

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 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

1,740 reviews

Check prices

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

1,740 reviews

Aer Lingus

7.3

Good

1,740 reviews

Check prices

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

How long is the flight from Portsmouth to USA?
Airlines like Aer Lingus, British Airways, and Delta fly from Portsmouth to USA in about 12h 09m. The time it takes to get you to your destination can typically vary by up to 8h 08m. 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 - New York John F Kennedy Intl, Southampton Eastleigh - Newark 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 (92%), Malaysia Airlines (92%) and Fiji Airways (88%).
What are the cheapest flights from Portsmouth to USA?
While on average a flight from Portsmouth to USA is generally £2,274, our data shows the cheapest flight currently is £319. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £434 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

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Top 10 airlines flying from Portsmouth to USA

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest£67	Average£196	FlexibilityNo cancel fee	On-time62%	Search Frontier flights
Air Canada	Cheapest£116	Average£578	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Iberia	Cheapest£199	Average£623	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
TAP AIR PORTUGAL	Cheapest£223	Average£481	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Delta	Cheapest£260	Average£620	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Icelandair	Cheapest£284	Average£445	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
SWISS	Cheapest£303	Average£492	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Aer Lingus	Cheapest£313	Average£684	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Hahn Air	Cheapest£315	Average£697	FlexibilityNo cancel fee	On-timeN/A	Search Hahn Air flights
Scandinavian Airlines	Cheapest£342	Average£523	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights

Fly with Cheapflights

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.

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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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Cheap flights from Portsmouth to the United States from £274

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 30/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to USA

Cheapest flights from Portsmouth to USAExplore 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 1 September 2026.

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 1 September 2026.

Best flights from Portsmouth to USADiscover carefully curated flight deals from Portsmouth to USA that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.

Discover carefully curated flight deals from Portsmouth to USA that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.

Last-minute flights from Portsmouth to USADiscover last-minute flight deals from Portsmouth to USA. Data last updated 1 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to USA. Data last updated 1 September 2026 and is based on user searches.

One-way flights from Portsmouth to USASearch for one-way flight options from Portsmouth to USA. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.

Search for one-way flight options from Portsmouth to USA. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.

Find flight deals from Portsmouth to USA

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portsmouth to the United States that are best for you.

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.

Cheapflights Insights

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 1 September 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 13% on your trip compared to booking a flight in the evening.

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 1 September 2026.

The most flights from P0R to US0 are scheduled on a Monday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (39 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 29 August 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 1 September 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.

Related info for your journey

How long is the flight from Portsmouth to USA?

What are the most popular routes from Portsmouth to USA?

What are the most reliable airlines from Portsmouth to USA?

What are the cheapest flights from Portsmouth to USA?

Can I find deals for flights from Portsmouth to USA that include hotel bookings?

How can I find direct flights from Portsmouth to USA?

Can I find deals for business class flights from Portsmouth to USA?

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.

Complete your trip

Complete your trip to USA by adding a car hire and/or hotel booking to your travel itinerary.

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Portsmouth and USA flights

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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 1 September 2026.

Best flights from Portsmouth to USA
Discover carefully curated flight deals from Portsmouth to USA that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 September 2026.

Last-minute flights from Portsmouth to USA
Discover last-minute flight deals from Portsmouth to USA. Data last updated 1 September 2026 and is based on user searches.

One-way flights from Portsmouth to USA
Search for one-way flight options from Portsmouth to USA. Find affordable one-way fares based on user searches. Data last updated 1 September 2026.