How long is the flight from Portsmouth to USA?

Airlines like British Airways, Aer Lingus, and Delta fly from Portsmouth to USA in about 13h 30m. The time it takes to get you to your destination can typically vary by up to 1h 15m. There are 5434 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 £2,424, our data shows the cheapest flight currently is £330. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £478 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.

£303+ 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 16 September 2026.

Thu 8/1009:20 -

1 stop18h 05m

Sat 24/1016:55 -

1 stop11h 50m

Deal found 12/9£446

Wed 18/1109:20 -

1 stop14h 15m

Mon 30/1117:20 -

1 stop18h 10m

Deal found 15/9£464

Mon 26/1009:20 -

1 stop14h 15m

Mon 2/1117:20 -

1 stop18h 10m

Deal found 11/9£466

Tue 20/1009:15 -

1 stop15h 05m

Tue 27/1018:00 -

1 stop10h 50m

Deal found 13/9£470

Thu 29/1020:00 -

1 stop25h 29m

Thu 5/1119:25 -

1 stop11h 30m

Deal found 14/9£472

Fri 9/1020:00 -

1 stop31h 25m

Fri 16/1023:55 -

1 stop11h 55m

Deal found 13/9£478

Thu 8/1009:20 -

1 stop18h 05m

Sat 24/1016:55 -

1 stop11h 50m

Deal found 15/9£481

Wed 7/1009:20 -

1 stop17h 05m

Mon 12/1020:10 -

1 stop15h 20m

Deal found 13/9£483

Thu 29/1009:20 -

1 stop17h 20m

Thu 5/1120:25 -

1 stop15h 05m

Deal found 14/9£484

Thu 29/1009:20 -

1 stop11h 50m

Thu 5/1117:40 -

1 stop10h 10m

Deal found 13/9£484

Tue 27/1009:20 -

1 stop15h 09m

Tue 3/1119:25 -

1 stop19h 05m

Deal found 12/9£484

Thu 29/1009:20 -

1 stop17h 20m

Wed 4/1120:25 -

1 stop15h 05m

Deal found 11/9£485

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 16 September 2026.

Wed 18/1109:20 -

1 stop14h 15m

Mon 30/1117:20 -

1 stop18h 10m

Deal found 15/9£479

Sat 31/1009:20 -

1 stop14h 45m

Sat 7/1117:15 -

1 stop10h 30m

Deal found 15/9£510

Thu 1/1009:05 -

1 stop15h 10m

Mon 5/1013:00 -

2 stops14h 35m

Deal found 15/9£533

Mon 26/1017:45 -

2 stops57h 21m

Mon 2/1113:50 -

1 stop19h 15m

Deal found 11/9£539

Sun 24/109:30 -

1 stop12h 56m

Wed 3/215:50 -

2 stops20h 10m

Deal found 14/9£643

Thu 7/109:20 -

1 stop12h 09m

Mon 11/117:00 -

1 stop13h 50m

Deal found 14/9£484

Fri 8/109:20 -

1 stop11h 50m

Tue 12/117:40 -

1 stop13h 10m

Deal found 13/9£484

Thu 8/1009:05 -

1 stop13h 02m

Sat 24/1010:55 -

2 stops18h 00m

Deal found 13/9£534

Thu 29/1008:40 -

2 stops28h 46m

Wed 4/1112:05 -

2 stops15h 05m

Deal found 10/9£584

Tue 1/1209:20 -

1 stop15h 09m

Fri 11/1217:00 -

1 stop10h 45m

Deal found 11/9£485

Wed 7/1009:15 -

1 stop13h 30m

Mon 12/1006:00 -

2 stops18h 35m

Deal found 13/9£535

Mon 26/1012:25 -

1 stop30h 30m

Mon 2/1119:35 -

2 stops18h 55m

Deal found 11/9£596

Sat 30/117:30 -

1 stop26h 25m

Sun 7/219:30 -

2 stops16h 30m

Deal found 14/9£584

Sat 6/209:20 -

1 stop11h 50m

Thu 11/217:40 -

1 stop10h 10m

Deal found 11/9£485

Wed 28/1017:35 -

1 stop26h 10m

Wed 4/1109:54 -

2 stops23h 11m

Deal found 13/9£535

Mon 26/1008:40 -

2 stops15h 52m

Mon 2/1118:00 -

2 stops18h 05m

Deal found 11/9£1,361

Wed 28/1008:40 -

2 stops28h 46m

Wed 4/1112:05 -

2 stops15h 05m

Deal found 13/9£587

Thu 15/1009:20 -

1 stop11h 45m

Sun 18/1017:35 -

1 stop10h 05m

Deal found 15/9£487

Wed 18/1108:40 -

2 stops22h 51m

Mon 30/1113:50 -

1 stop19h 10m

Deal found 15/9£536

Thu 8/1009:05 -

2 stops19h 22m

Sat 24/1008:50 -

2 stops20h 05m

Deal found 15/9£537

Tue 2/212:20 -

1 stop12h 09m

Fri 5/221:05 -

1 stop30h 40m

Deal found 13/9£492

Sat 31/1009:25 -

2 stops17h 40m

Sat 7/1119:30 -

2 stops16h 20m

Deal found 15/9£599

Thu 1/1009:05 -

2 stops15h 53m

Mon 5/1012:00 -

2 stops15h 35m

Deal found 15/9£537

Wed 14/1020:00 -

1 stop25h 05m

Sun 18/1017:35 -

1 stop10h 05m

Deal found 12/9£495

Thu 29/1008:40 -

2 stops28h 36m

Thu 5/1112:37 -

2 stops14h 33m

Deal found 14/9£641

Fri 9/1009:05 -

2 stops18h 20m

Fri 16/1010:59 -

2 stops16h 46m

Deal found 14/9£539

Thu 29/1012:25 -

1 stop11h 55m

Thu 5/1120:50 -

1 stop10h 05m

Deal found 14/9£513

Sun 24/109:30 -

1 stop12h 56m

Wed 3/219:20 -

1 stop16h 40m

Deal found 14/9£643

Fri 13/1108:40 -

2 stops19h 56m

Sun 15/1123:39 -

2 stops24h 31m

Deal found 14/9£539

Sun 4/1009:20 -

1 stop11h 25m

Sun 11/1017:15 -

1 stop10h 25m

Deal found 15/9£513

Find flight deals from Portsmouth to USA

Round-trip from	£446
One-way from	£303
Popular in	July
Cheapest in	February
Average price	£440

Aer Lingus
8/10-24/10
2 total stops
29h 55m total
Portsmouth to USA

Search Deals

15/12-31/12
2 total stops
24h 55m total
Portsmouth to USA

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£76 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 11/1

12:25-19:05

3 stops35h 40m

New York John F Kennedy Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£345

SouthamptonMiami

SOU Southampton Eastleigh - MIA Miami

SOUMIA

Southampton Eastleigh

Tue 15/12

09:20-19:35

3 stops39h 15m

Miami

Wed 31/12

00:00-06:00

Nonstop0h 00m

£382

SouthamptonNew York

SOU Southampton Eastleigh - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Tue 15/12

20:00-17:30

2 stops26h 30m

New York LaGuardia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£414

SouthamptonNew York

SOU Southampton Eastleigh - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Mon 11/1

08:40-21:29

2 stops17h 49m

New York LaGuardia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£424

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Sat 3/10

07:50-19:25

3 stops40h 35m

Baltimore/Washington

Wed 31/12

00:00-06:00

Nonstop0h 00m

£430

SouthamptonNew York

SOU Southampton Eastleigh - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Mon 11/1

17:55-20:00

3 stops31h 05m

New York LaGuardia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£435

SouthamptonSan Francisco

SOU Southampton Eastleigh - SFO San Francisco

SOUSFO

Southampton Eastleigh

Sun 25/10

19:30-12:45

3 stops48h 15m

San Francisco

Wed 31/12

00:00-09:00

Nonstop0h 00m

£437

SouthamptonWashington, D.C.

SOU Southampton Eastleigh - IAD Washington, D.C. Dulles Intl

SOUIAD

Southampton Eastleigh

Mon 23/11

08:40-15:55

1 stop12h 15m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£445

SouthamptonLos Angeles

SOU Southampton Eastleigh - LAX Los Angeles Los Angeles

SOULAX

Southampton Eastleigh

Mon 11/1

09:20-18:40

1 stop17h 20m

Los Angeles Los Angeles

Wed 31/12

00:00-09:00

Nonstop0h 00m

£448

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Mon 23/11

08:40-17:53

2 stops14h 13m

Baltimore/Washington

Wed 31/12

00:00-06:00

Nonstop0h 00m

£448

Flights are sorted by cheapest return flights first.

Deals found on 11/9

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-LGA

SOU-LAX

SOU-SFO

SOU-MCO

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-LGA

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 10% 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 (56 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 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

1,763 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

1,763 reviews

Aer Lingus

7.3

Good

1,763 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, Aer Lingus, and Delta fly from Portsmouth to USA in about 13h 30m. The time it takes to get you to your destination can typically vary by up to 1h 15m. There are 5434 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 (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 £2,424, our data shows the cheapest flight currently is £330. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £478 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£580	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
TAP AIR PORTUGAL	Cheapest£224	Average£481	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
JetBlue	Cheapest£258	Average£604	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Delta	Cheapest£261	Average£622	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Icelandair	Cheapest£286	Average£453	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
SWISS	Cheapest£305	Average£502	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Hahn Air	Cheapest£316	Average£700	FlexibilityNo cancel fee	On-timeN/A	Search Hahn Air flights
Brussels Airlines	Cheapest£333	Average£611	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Scandinavian Airlines	Cheapest£333	Average£524	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 £303

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/12. 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 16 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 16 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 16 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 16 September 2026.

Last-minute flights from Portsmouth to USADiscover last-minute flight deals from Portsmouth to USA. Data last updated 16 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to USA. Data last updated 16 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 16 September 2026.

Search for one-way flight options from Portsmouth to USA. Find affordable one-way fares based on user searches. Data last updated 16 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 16 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 10% 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 16 September 2026.

The most flights from P0R to US0 are scheduled on a Monday (56 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (48 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 12 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 16 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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Book a non-stop flight to one of these other cities located in .

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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 16 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 16 September 2026.

Last-minute flights from Portsmouth to USA
Discover last-minute flight deals from Portsmouth to USA. Data last updated 16 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 16 September 2026.