How long is the flight from Portsmouth to USA?

Airlines like Aer Lingus, Delta, and KLM fly from Portsmouth to USA in about 10h 30m. The time it takes to get you to your destination can typically vary by up to 5h 25m. 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 £3,692, our data shows the cheapest flight currently is £317. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £464 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.

£202+ 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 25 August 2026.

Mon 28/909:20 -

1 stop18h 05m

Sun 4/1021:05 -

1 stop17h 25m

Deal found 21/8£212

Tue 24/1109:20 -

1 stop15h 05m

Wed 2/1215:55 -

1 stop10h 45m

Deal found 22/8£238

Mon 5/1009:20 -

1 stop18h 05m

Mon 12/1021:05 -

1 stop17h 25m

Deal found 21/8£238

Mon 5/1009:20 -

1 stop11h 45m

Mon 12/1017:35 -

1 stop10h 05m

Deal found 21/8£247

Mon 5/1009:20 -

1 stop18h 05m

Mon 12/1016:55 -

2 stops34h 50m

Deal found 21/8£274

Mon 5/1009:20 -

1 stop11h 45m

Mon 12/1017:35 -

2 stops34h 10m

Deal found 21/8£282

Thu 3/909:20 -

1 stop18h 05m

Mon 7/916:55 -

1 stop10h 45m

Deal found 21/8£350

Mon 28/909:20 -

1 stop18h 05m

Sun 4/1018:20 -

2 stops20h 10m

Deal found 21/8£375

Mon 5/1009:20 -

1 stop15h 55m

Mon 12/1021:00 -

1 stop16h 30m

Deal found 21/8£431

Thu 3/917:20 -

2 stops34h 05m

Mon 7/916:55 -

1 stop10h 45m

Deal found 21/8£441

Tue 6/1009:15 -

3 stops33h 00m

Tue 13/1017:15 -

2 stops21h 15m

Deal found 22/8£454

Sat 3/1017:20 -

2 stops26h 40m

Sat 10/1021:00 -

1 stop13h 50m

Deal found 21/8£468

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 25 August 2026.

Sat 3/1009:20 -

1 stop15h 55m

Sat 10/1021:00 -

1 stop13h 50m

Deal found 21/8£560

Wed 7/1009:15 -

1 stop12h 50m

Wed 14/1009:50 -

2 stops17h 45m

Deal found 25/8£618

Mon 28/909:05 -

1 stop10h 30m

Wed 14/1013:15 -

2 stops14h 20m

Deal found 24/8£618

Wed 11/1117:30 -

1 stop26h 15m

Fri 27/1109:40 -

2 stops23h 20m

Deal found 23/8£625

Thu 15/1020:00 -

2 stops23h 59m

Fri 30/1016:20 -

2 stops20h 15m

Deal found 22/8£701

Wed 23/908:55 -

1 stop12h 10m

Thu 1/1017:35 -

1 stop10h 05m

Deal found 24/8£741

Wed 7/1009:20 -

1 stop14h 35m

Wed 14/1017:40 -

1 stop15h 10m

Deal found 25/8£566

Mon 28/909:05 -

1 stop10h 30m

Wed 14/1013:15 -

2 stops14h 20m

Deal found 25/8£618

Tue 22/909:05 -

2 stops23h 21m

Tue 29/916:45 -

1 stop16h 05m

Deal found 23/8£628

Tue 22/909:15 -

1 stop16h 00m

Mon 28/915:45 -

1 stop10h 55m

Deal found 24/8£574

Wed 14/1009:15 -

1 stop13h 30m

Mon 19/1006:00 -

2 stops18h 35m

Deal found 22/8£635

Wed 7/1009:15 -

2 stops17h 18m

Wed 14/1013:59 -

2 stops13h 36m

Deal found 25/8£620

Wed 7/1009:15 -

2 stops18h 51m

Wed 14/1013:45 -

1 stop19h 05m

Deal found 24/8£641

Thu 24/920:00 -

2 stops23h 59m

Mon 28/917:35 -

2 stops20h 55m

Deal found 22/8£722

Fri 11/917:20 -

1 stop26h 25m

Tue 15/916:55 -

1 stop18h 55m

Deal found 25/8£673

Wed 23/908:55 -

1 stop15h 25m

Thu 1/1021:05 -

1 stop17h 25m

Deal found 24/8£741

Tue 6/1009:05 -

2 stops17h 28m

Tue 13/1012:00 -

2 stops15h 45m

Deal found 22/8£621

Sat 3/1017:20 -

1 stop26h 25m

Sat 10/1022:15 -

2 stops26h 20m

Deal found 20/8£644

Thu 29/1009:20 -

1 stop16h 30m

Thu 5/1119:35 -

1 stop13h 00m

Deal found 25/8£669

Mon 5/1009:05 -

2 stops18h 19m

Mon 12/1009:00 -

2 stops18h 35m

Deal found 21/8£622

Tue 24/1109:20 -

1 stop15h 05m

Tue 15/1219:05 -

2 stops14h 40m

Deal found 25/8£754

Thu 8/1009:05 -

2 stops21h 22m

Thu 15/1010:59 -

2 stops21h 51m

Deal found 25/8£707

Sun 15/1109:30 -

2 stops23h 42m

Sun 22/1113:50 -

1 stop34h 20m

Deal found 25/8£651

Mon 28/909:05 -

2 stops18h 19m

Wed 14/1008:59 -

2 stops18h 36m

Deal found 25/8£622

Thu 15/1009:20 -

1 stop14h 30m

Sat 24/1017:40 -

1 stop18h 50m

Deal found 21/8£760

Sat 3/1009:15 -

2 stops33h 02m

Sat 10/1011:45 -

2 stops21h 05m

Deal found 20/8£713

Mon 5/1009:05 -

2 stops17h 32m

Mon 12/1019:45 -

2 stops16h 05m

Deal found 22/8£682

Thu 8/1009:05 -

1 stop13h 40m

Fri 16/1014:00 -

2 stops18h 50m

Deal found 24/8£625

Thu 5/1117:05 -

1 stop29h 05m

Fri 20/1119:05 -

1 stop16h 30m

Deal found 21/8£761

Mon 5/1009:05 -

1 stop11h 25m

Mon 12/1016:50 -

1 stop18h 00m

Deal found 21/8£686

Find flight deals from Portsmouth to USA

Round-trip from	£212
One-way from	£202
Popular in	July
Cheapest in	February
Average price	£551

Aer Lingus
28/9-4/10
2 total stops
35h 30m total
Portsmouth to USA

Search Deals

Aer Lingus
31/12
1 total stop
28h 24m total
Portsmouth to USA

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£79 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 August 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

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Sat 3/10

09:20-19:15

1 stop15h 55m

Chicago O'Hare Intl

Sat 10/10

21:00-16:50

1 stop13h 50m

£560

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Wed 7/10

09:20-15:55

1 stop14h 35m

San Francisco

Wed 14/10

17:40-16:50

1 stop15h 10m

£566

SouthamptonChicago

SOU Southampton Eastleigh - ORD Chicago O'Hare Intl

SOUORD

Southampton Eastleigh

Tue 22/9

09:15-19:15

1 stop16h 00m

Chicago O'Hare Intl

Mon 28/9

15:45-08:40

1 stop10h 55m

£574

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Wed 7/10

09:15-17:05

1 stop12h 50m

New York John F Kennedy Intl

Wed 14/10

09:50-08:35

2 stops17h 45m

£618

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Mon 28/9

09:05-14:35

1 stop10h 30m

New York John F Kennedy Intl

Wed 14/10

13:15-08:35

2 stops14h 20m

£618

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Mon 28/9

09:05-14:35

1 stop10h 30m

New York John F Kennedy Intl

Wed 14/10

13:15-08:35

2 stops14h 20m

£618

SouthamptonNew York

SOU Southampton Eastleigh - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Wed 7/10

09:15-21:33

2 stops17h 18m

New York LaGuardia

Wed 14/10

13:59-08:35

2 stops13h 36m

£620

SouthamptonNew York

SOU Southampton Eastleigh - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Tue 6/10

09:05-21:33

2 stops17h 28m

New York LaGuardia

Tue 13/10

12:00-08:45

2 stops15h 45m

£621

SouthamptonNew York

SOU Southampton Eastleigh - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Mon 5/10

09:05-22:24

2 stops18h 19m

New York LaGuardia

Mon 12/10

09:00-08:35

2 stops18h 35m

£622

SouthamptonNew York

SOU Southampton Eastleigh - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Mon 28/9

09:05-22:24

2 stops18h 19m

New York LaGuardia

Wed 14/10

08:59-08:35

2 stops18h 36m

£622

Flights are sorted by cheapest return flights first.

Deals found on 21/8

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-ORD

SOU-LAX

SOU-LGA

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-ORD

SOU-LAX

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 Wednesday, which is when the least amount of flights are scheduled (52 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

1,728 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

1,728 reviews

Aer Lingus

7.3

Good

1,728 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, Delta, and KLM fly from Portsmouth to USA in about 10h 30m. The time it takes to get you to your destination can typically vary by up to 5h 25m. 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 £3,692, our data shows the cheapest flight currently is £317. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £464 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£66	Average£195	FlexibilityNo cancel fee	On-time62%	Search Frontier flights
Air Canada	Cheapest£115	Average£565	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Iberia	Cheapest£198	Average£615	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Delta	Cheapest£219	Average£615	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
TAP AIR PORTUGAL	Cheapest£222	Average£476	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
JetBlue	Cheapest£255	Average£594	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Icelandair	Cheapest£282	Average£440	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
SWISS	Cheapest£301	Average£477	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Aer Lingus	Cheapest£311	Average£673	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Hahn Air	Cheapest£312	Average£692	FlexibilityNo cancel fee	On-timeN/A	Search Hahn Air flights

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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 £202

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 31/12. 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 25 August 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 25 August 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 25 August 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 25 August 2026.

Last-minute flights from Portsmouth to USADiscover last-minute flight deals from Portsmouth to USA. Data last updated 25 August 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to USA. Data last updated 25 August 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 25 August 2026.

Search for one-way flight options from Portsmouth to USA. Find affordable one-way fares based on user searches. Data last updated 25 August 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 25 August 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 25 August 2026.

The most flights from P0R to US0 are scheduled on a Monday (57 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (52 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 22 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 25 August 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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Can Cheapflights notify me if prices for flights from Portsmouth to USA become cheaper?

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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 25 August 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 25 August 2026.

Last-minute flights from Portsmouth to USA
Discover last-minute flight deals from Portsmouth to USA. Data last updated 25 August 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 25 August 2026.