How long is the flight from Portsmouth to USA?

Airlines like British Airways, Delta, and KLM fly from Portsmouth to USA in about 12h 04m. The time it takes to get you to your destination can typically vary by up to 6h 48m. 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 - Newark, Southampton Eastleigh - New York John F Kennedy Intl or Southampton Eastleigh - Los Angeles Los Angeles 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 £2,315, our data shows the cheapest flight currently is £324. When looking at the most popular route, (Southampton Eastleigh - Newark), you can expect to pay £468 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 (95%), Malaysia Airlines (92%) and Fiji Airways (89%).

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.

£294+ 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 7 September 2026.

Sun 11/1009:20 -

1 stop18h 05m

Sun 25/1018:00 -

1 stop10h 50m

Deal found 3/9£444

Sun 4/1009:20 -

1 stop11h 45m

Tue 13/1017:35 -

1 stop9h 30m

Deal found 4/9£453

Tue 20/1009:15 -

1 stop15h 05m

Tue 27/1018:00 -

1 stop10h 50m

Deal found 5/9£453

Sun 4/1009:20 -

1 stop11h 45m

Wed 14/1017:35 -

1 stop18h 15m

Deal found 4/9£454

Sat 3/1009:20 -

1 stop15h 00m

Sat 10/1016:55 -

1 stop10h 40m

Deal found 5/9£454

Wed 18/1109:20 -

1 stop17h 20m

Wed 25/1120:25 -

1 stop15h 05m

Deal found 7/9£468

Fri 2/1009:20 -

1 stop11h 45m

Sun 4/1017:35 -

1 stop10h 05m

Deal found 6/9£470

Thu 15/1020:00 -

1 stop30h 25m

Thu 22/1020:10 -

1 stop15h 20m

Deal found 4/9£475

Tue 20/1009:15 -

3 stops35h 25m

Tue 27/1018:35 -

2 stops20h 55m

Deal found 5/9£479

Wed 21/1009:20 -

1 stop14h 35m

Wed 28/1018:20 -

1 stop18h 10m

Deal found 6/9£480

Sun 11/1009:20 -

1 stop18h 05m

Mon 26/1018:00 -

1 stop10h 50m

Deal found 4/9£480

Mon 5/1009:20 -

1 stop17h 05m

Mon 12/1020:10 -

1 stop15h 20m

Deal found 7/9£482

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 7 September 2026.

Fri 5/312:25 -

1 stop12h 04m

Fri 26/318:00 -

1 stop10h 45m

Deal found 4/9£482

Thu 22/1009:05 -

1 stop13h 40m

Thu 29/1006:00 -

2 stops19h 10m

Deal found 7/9£533

Wed 18/1117:35 -

2 stops30h 38m

Wed 25/1109:40 -

2 stops23h 25m

Deal found 7/9£536

Wed 21/1009:15 -

2 stops19h 25m

Wed 28/1014:05 -

2 stops20h 00m

Deal found 6/9£536

Wed 23/917:20 -

1 stop26h 25m

Fri 9/1010:35 -

2 stops38h 10m

Deal found 7/9£573

Wed 28/1009:20 -

1 stop11h 50m

Mon 2/1117:40 -

1 stop10h 10m

Deal found 6/9£483

Tue 20/1009:15 -

1 stop11h 50m

Thu 10/1217:40 -

1 stop13h 15m

Deal found 3/9£484

Tue 6/1009:05 -

1 stop13h 40m

Mon 12/1006:40 -

2 stops17h 55m

Deal found 6/9£533

Tue 20/1009:05 -

2 stops15h 55m

Tue 27/1017:30 -

2 stops19h 35m

Deal found 7/9£537

Tue 20/1009:15 -

1 stop15h 05m

Thu 10/1217:00 -

1 stop10h 50m

Deal found 3/9£484

Thu 22/1017:20 -

1 stop26h 25m

Thu 29/1009:59 -

2 stops24h 06m

Deal found 7/9£533

Thu 15/1017:20 -

1 stop33h 15m

Thu 22/1007:10 -

2 stops17h 25m

Deal found 4/9£594

Mon 5/1009:20 -

1 stop15h 00m

Mon 26/1018:00 -

1 stop10h 50m

Deal found 7/9£484

Mon 12/1017:20 -

1 stop26h 25m

Mon 19/1023:49 -

2 stops24h 56m

Deal found 4/9£533

Tue 17/1108:40 -

1 stop13h 35m

Thu 26/1106:00 -

2 stops18h 10m

Deal found 7/9£595

Tue 20/1009:15 -

3 stops18h 21m

Tue 27/1016:30 -

3 stops23h 00m

Deal found 5/9£701

Wed 21/1009:15 -

2 stops20h 08m

Wed 28/1020:15 -

1 stop16h 50m

Deal found 6/9£638

Tue 20/1009:05 -

1 stop13h 02m

Tue 27/1010:20 -

2 stops17h 50m

Deal found 5/9£533

Sun 11/1009:20 -

1 stop15h 00m

Tue 20/1021:05 -

1 stop17h 25m

Deal found 2/9£485

Wed 7/1009:20 -

1 stop18h 05m

Sun 11/1016:55 -

1 stop10h 45m

Deal found 2/9£485

Thu 15/1009:05 -

1 stop17h 30m

Thu 22/1020:25 -

1 stop28h 20m

Deal found 4/9£711

Wed 21/1009:15 -

2 stops17h 18m

Wed 28/1012:59 -

2 stops15h 11m

Deal found 6/9£536

Sun 18/1017:20 -

2 stops28h 06m

Sun 25/1018:59 -

2 stops18h 06m

Deal found 3/9£672

Tue 1/1217:30 -

2 stops43h 34m

Tue 5/119:55 -

2 stops40h 05m

Deal found 3/9£536

Tue 16/212:20 -

1 stop32h 50m

Mon 22/217:40 -

1 stop10h 10m

Deal found 6/9£490

Sun 11/1009:15 -

2 stops19h 18m

Tue 27/1017:05 -

2 stops35h 05m

Deal found 7/9£681

Fri 25/909:05 -

2 stops18h 19m

Thu 1/1011:20 -

2 stops16h 15m

Deal found 6/9£537

Sat 26/917:20 -

1 stop25h 20m

Fri 9/1016:55 -

1 stop18h 55m

Deal found 2/9£495

Sun 18/1009:20 -

2 stops15h 05m

Sun 25/1011:55 -

2 stops20h 00m

Deal found 3/9£828

Thu 29/1017:35 -

1 stop26h 10m

Fri 25/1213:50 -

1 stop19h 10m

Deal found 3/9£558

Find flight deals from Portsmouth to USA

Round-trip from	£444
One-way from	£294
Popular in	July
Cheapest in	February
Average price	£422

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

Search Deals

13/12-31/12
2 total stops
29h 30m total
Portsmouth to USA

Search Deals

Highest demand for flights based on searches. 18% potential increase in price (£78 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

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Sun 25/10

09:20-16:35

1 stop14h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£369

SouthamptonLos Angeles

SOU Southampton Eastleigh - LAX Los Angeles Los Angeles

SOULAX

Southampton Eastleigh

Tue 8/12

20:00-18:40

1 stop30h 40m

Los Angeles Los Angeles

Wed 31/12

00:00-09:00

Nonstop0h 00m

£442

SouthamptonLos Angeles

SOU Southampton Eastleigh - LAX Los Angeles Los Angeles

SOULAX

Southampton Eastleigh

Mon 28/12

09:20-18:40

1 stop17h 20m

Los Angeles Los Angeles

Wed 31/12

00:00-09:00

Nonstop0h 00m

£446

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Sat 14/11

09:20-15:35

1 stop14h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£450

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Mon 18/1

09:20-15:35

1 stop14h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£451

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Tue 27/10

09:20-16:35

1 stop14h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£451

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Tue 12/1

12:20-19:29

1 stop12h 09m

New York John F Kennedy Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£464

SouthamptonNew York

SOU Southampton Eastleigh - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Mon 1/2

09:20-21:29

2 stops17h 09m

New York LaGuardia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£468

Fastest return journey

SouthamptonNewark

SOU Southampton Eastleigh - EWR Newark

SOUEWR

Southampton Eastleigh

Mon 1/2

09:20-16:10

1 stop11h 50m

Newark

Wed 31/12

00:00-06:00

Nonstop0h 00m

£470

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Tue 2/2

12:20-19:29

1 stop12h 09m

New York John F Kennedy Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£470

Flights are sorted by cheapest return flights first.

Deals found on 5/9

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-LAX

SOU-SFO

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-LAX

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 Thursday (57 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (41 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 Tuesday mornings 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

1,749 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

1,749 reviews

Aer Lingus

7.3

Good

1,749 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 British Airways, Delta, and KLM fly from Portsmouth to USA in about 12h 04m. The time it takes to get you to your destination can typically vary by up to 6h 48m. 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 - Newark, Southampton Eastleigh - New York John F Kennedy Intl or Southampton Eastleigh - Los Angeles Los Angeles 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 (95%), Malaysia Airlines (92%) and Fiji Airways (89%).
What are the cheapest flights from Portsmouth to USA?
While on average a flight from Portsmouth to USA is generally £2,315, our data shows the cheapest flight currently is £324. When looking at the most popular route, (Southampton Eastleigh - Newark), you can expect to pay £468 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£197	FlexibilityNo cancel fee	On-time62%	Search Frontier flights
Air Canada	Cheapest£116	Average£581	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Iberia	Cheapest£199	Average£624	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
TAP AIR PORTUGAL	Cheapest£223	Average£479	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
JetBlue	Cheapest£257	Average£601	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Delta	Cheapest£260	Average£619	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Icelandair	Cheapest£285	Average£452	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
SWISS	Cheapest£304	Average£493	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Hahn Air	Cheapest£315	Average£698	FlexibilityNo cancel fee	On-timeN/A	Search Hahn Air flights
Aer Lingus	Cheapest£316	Average£692	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus 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 £294

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/12. 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 7 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 7 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 7 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 7 September 2026.

Last-minute flights from Portsmouth to USADiscover last-minute flight deals from Portsmouth to USA. Data last updated 7 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to USA. Data last updated 7 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 7 September 2026.

Search for one-way flight options from Portsmouth to USA. Find affordable one-way fares based on user searches. Data last updated 7 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 7 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 7 September 2026.

The most flights from P0R to US0 are scheduled on a Thursday (57 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (41 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 5 September 2026.

Travellers seeking maximum savings on their Portsmouth to USA flight should consider departing on Tuesday mornings 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 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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Find flights from Portsmouth to USA, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Portsmouth and USA flights

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Top 10 airlines flying from Portsmouth to USA

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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 7 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 7 September 2026.

Last-minute flights from Portsmouth to USA
Discover last-minute flight deals from Portsmouth to USA. Data last updated 7 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 7 September 2026.