How long is the flight from Portsmouth to USA?

Airlines like Aer Lingus, KLM, and Delta fly from Portsmouth to USA in about 13h 02m. The time it takes to get you to your destination can typically vary by up to 5h 03m. 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 - Los Angeles, Southampton Eastleigh - Miami or Southampton Eastleigh - New York John F Kennedy Intl 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 £2,395, our data shows the cheapest flight currently is £336. When looking at the most popular route, (Southampton Eastleigh - Los Angeles), you can expect to pay £484 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 (89%) and Fiji Airways (86%).

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.

£300+ 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 20 September 2026.

Thu 8/1009:20 -

1 stop18h 05m

Sat 24/1016:55 -

1 stop11h 50m

Deal found 18/9£444

Wed 4/1109:20 -

1 stop15h 09m

Wed 11/1119:25 -

1 stop11h 30m

Deal found 20/9£453

Fri 30/1009:20 -

1 stop11h 55m

Fri 6/1117:45 -

1 stop13h 10m

Deal found 15/9£455

Mon 23/1109:20 -

1 stop12h 09m

Mon 30/1117:00 -

1 stop10h 50m

Deal found 20/9£468

Mon 23/1109:20 -

2 stops35h 25m

Mon 30/1117:35 -

3 stops20h 55m

Deal found 20/9£475

Wed 4/1109:20 -

1 stop14h 15m

Wed 11/1117:20 -

1 stop18h 10m

Deal found 20/9£475

Thu 19/1109:20 -

1 stop15h 09m

Sun 22/1117:00 -

1 stop10h 50m

Deal found 20/9£476

Thu 8/1009:05 -

1 stop13h 02m

Wed 21/1016:40 -

1 stop10h 55m

Deal found 18/9£477

Tue 3/1108:40 -

1 stop11h 20m

Tue 10/1110:25 -

2 stops16h 45m

Deal found 19/9£478

Tue 3/1109:20 -

1 stop11h 55m

Tue 10/1117:45 -

1 stop10h 05m

Deal found 19/9£479

Wed 4/1108:40 -

1 stop11h 20m

Wed 11/1117:00 -

1 stop10h 10m

Deal found 20/9£479

Thu 8/1009:05 -

1 stop13h 02m

Sat 24/1010:20 -

2 stops18h 35m

Deal found 16/9£481

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 20 September 2026.

Thu 8/1009:20 -

1 stop18h 05m

Sat 24/1016:55 -

1 stop11h 50m

Deal found 16/9£447

Thu 8/1009:05 -

1 stop13h 02m

Sat 24/1010:20 -

2 stops18h 35m

Deal found 16/9£481

Sat 31/1009:20 -

1 stop14h 15m

Wed 4/1117:20 -

1 stop18h 10m

Deal found 18/9£483

Tue 13/1017:20 -

2 stops31h 39m

Tue 20/1015:00 -

2 stops20h 50m

Deal found 15/9£535

Wed 4/1108:40 -

2 stops20h 00m

Wed 11/1112:10 -

2 stops20h 55m

Deal found 20/9£537

Fri 30/1017:35 -

2 stops29h 56m

Fri 6/1111:38 -

2 stops21h 12m

Deal found 15/9£588

Mon 2/1108:40 -

2 stops17h 47m

Mon 9/1118:00 -

2 stops18h 05m

Deal found 18/9£482

Tue 13/1009:15 -

1 stop17h 10m

Thu 10/1220:25 -

1 stop15h 05m

Deal found 18/9£484

Wed 4/1108:40 -

2 stops17h 53m

Wed 11/1118:00 -

2 stops18h 05m

Deal found 19/9£482

Wed 2/1209:20 -

1 stop17h 20m

Mon 7/1220:25 -

1 stop15h 05m

Deal found 16/9£486

Thu 8/1017:20 -

2 stops35h 07m

Sat 24/1011:55 -

2 stops17h 00m

Deal found 16/9£540

Wed 4/1117:35 -

1 stop26h 12m

Wed 11/1106:00 -

2 stops18h 10m

Deal found 20/9£555

Thu 8/1009:05 -

2 stops18h 20m

Sat 24/1011:55 -

2 stops17h 00m

Deal found 18/9£485

Thu 8/1009:20 -

1 stop18h 05m

Sat 24/1016:55 -

1 stop11h 50m

Deal found 15/9£488

Sun 1/1109:30 -

1 stop34h 17m

Sun 8/1114:35 -

1 stop18h 30m

Deal found 17/9£601

Tue 3/1108:40 -

2 stops21h 25m

Tue 10/1107:15 -

2 stops25h 50m

Deal found 19/9£558

Sun 1/1117:30 -

2 stops37h 34m

Sun 8/1117:55 -

2 stops54h 15m

Deal found 17/9£585

Sat 3/1009:15 -

2 stops17h 25m

Fri 16/1012:00 -

2 stops15h 45m

Deal found 18/9£488

Thu 15/1009:20 -

1 stop11h 45m

Sun 18/1017:35 -

1 stop10h 05m

Deal found 15/9£490

Tue 3/1108:40 -

2 stops18h 45m

Tue 10/1111:33 -

2 stops15h 37m

Deal found 19/9£488

Sat 31/1009:25 -

2 stops20h 39m

Sat 7/1107:45 -

2 stops17h 10m

Deal found 16/9£597

Mon 12/1020:00 -

1 stop30h 25m

Mon 19/1020:10 -

1 stop15h 20m

Deal found 18/9£494

Wed 4/1108:40 -

2 stops15h 24m

Wed 11/1110:35 -

2 stops16h 35m

Deal found 19/9£489

Sat 3/1019:25 -

1 stop30h 35m

Fri 16/1023:00 -

1 stop14h 55m

Deal found 20/9£721

Wed 14/1020:00 -

1 stop25h 05m

Sun 18/1017:35 -

1 stop10h 05m

Deal found 18/9£494

Thu 29/1008:40 -

2 stops28h 36m

Thu 5/1112:37 -

2 stops14h 33m

Deal found 19/9£638

Thu 8/1017:20 -

1 stop27h 45m

Sat 24/1018:35 -

1 stop10h 10m

Deal found 15/9£497

Tue 3/1108:40 -

2 stops17h 55m

Tue 10/1112:18 -

2 stops14h 52m

Deal found 19/9£648

Sat 31/1009:25 -

2 stops21h 01m

Wed 4/1106:00 -

2 stops18h 10m

Deal found 18/9£536

Wed 30/920:00 -

1 stop30h 25m

Mon 5/1020:10 -

1 stop27h 55m

Deal found 19/9£504

Find flight deals from Portsmouth to USA

Round-trip from	£444
One-way from	£300
Popular in	July
Cheapest in	February
Average price	£454

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

Search Deals

23/11-31/12
2 total stops
53h 10m total
Portsmouth to USA

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£75 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 - LGA New York LaGuardia

SOULGA

Southampton Eastleigh

Sun 15/11

19:30-20:00

3 stops29h 30m

New York LaGuardia

Wed 31/12

00:00-06:00

Nonstop0h 00m

£385

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

£443

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

£443

SouthamptonLos Angeles

SOU Southampton Eastleigh - LAX Los Angeles

SOULAX

Southampton Eastleigh

Thu 25/2

09:20-18:40

1 stop17h 20m

Los Angeles

Wed 31/12

00:00-09:00

Nonstop0h 00m

£446

SouthamptonBaltimore

SOU Southampton Eastleigh - BWI Baltimore/Washington

SOUBWI

Southampton Eastleigh

Mon 23/11

08:40-23:27

2 stops19h 47m

Baltimore/Washington

Wed 31/12

00:00-06:00

Nonstop0h 00m

£447

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Thu 8/10

09:20-22:25

1 stop18h 05m

New York John F Kennedy Intl

Sat 24/10

16:55-09:45

1 stop11h 50m

£447

SouthamptonOrlando

SOU Southampton Eastleigh - MCO Orlando

SOUMCO

Southampton Eastleigh

Thu 31/12

12:25-21:29

2 stops38h 04m

Orlando

Wed 31/12

00:00-06:00

Nonstop0h 00m

£453

SouthamptonNewark

SOU Southampton Eastleigh - EWR Newark

SOUEWR

Southampton Eastleigh

Mon 7/12

09:20-16:15

1 stop11h 55m

Newark

Wed 31/12

00:00-06:00

Nonstop0h 00m

£454

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Mon 7/12

09:20-19:29

1 stop15h 09m

New York John F Kennedy Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£454

Fastest return journey

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 14/1

09:20-15:45

1 stop11h 25m

Washington, D.C. Dulles Intl

Wed 31/12

00:00-06:00

Nonstop0h 00m

£455

Flights are sorted by cheapest return flights first.

Deals found on 16/9

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-SFO

SOU-EWR

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-SFO

SOU-EWR

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 9% 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 Saturday (57 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (49 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

1,770 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

1,770 reviews

Aer Lingus

7.3

Good

1,770 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, KLM, and Delta fly from Portsmouth to USA in about 13h 02m. The time it takes to get you to your destination can typically vary by up to 5h 03m. 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 - Los Angeles, Southampton Eastleigh - Miami or Southampton Eastleigh - New York John F Kennedy Intl 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 (89%) and Fiji Airways (86%).
What are the cheapest flights from Portsmouth to USA?
While on average a flight from Portsmouth to USA is generally £2,395, our data shows the cheapest flight currently is £336. When looking at the most popular route, (Southampton Eastleigh - Los Angeles), you can expect to pay £484 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£198	FlexibilityNo cancel fee	On-time62%	Search Frontier flights
Air Canada	Cheapest£117	Average£588	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
TAP AIR PORTUGAL	Cheapest£226	Average£490	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
JetBlue	Cheapest£260	Average£611	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Delta	Cheapest£262	Average£620	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
Icelandair	Cheapest£284	Average£460	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
SWISS	Cheapest£306	Average£512	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Alaska Airlines	Cheapest£331	Average£542	FlexibilityNo cancel fee	On-time75%	Search Alaska Airlines flights
Brussels Airlines	Cheapest£335	Average£615	FlexibilityNo cancel fee	On-timeN/A	Search Brussels Airlines flights
Scandinavian Airlines	Cheapest£335	Average£527	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 £300

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 23/11. 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 20 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 20 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 20 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 20 September 2026.

Last-minute flights from Portsmouth to USADiscover last-minute flight deals from Portsmouth to USA. Data last updated 20 September 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to USA. Data last updated 20 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 20 September 2026.

Search for one-way flight options from Portsmouth to USA. Find affordable one-way fares based on user searches. Data last updated 20 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 20 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 9% 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 20 September 2026.

The most flights from P0R to US0 are scheduled on a Saturday (57 on average). You will have fewer flight options on Sunday, 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 19 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 20 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.

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from Portsmouth to USA by cabin class

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

Browse other Portsmouth and USA flight options. Last updated on 20 September 2026.

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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 20 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 20 September 2026.

Last-minute flights from Portsmouth to USA
Discover last-minute flight deals from Portsmouth to USA. Data last updated 20 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 20 September 2026.