How long is the flight from Portsmouth to USA?

Airlines like Aer Lingus, Delta, and KLM fly from Portsmouth to USA in about 14h 53m. The time it takes to get you to your destination can typically vary by up to 14h 32m. There are 3228 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 - San Francisco 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 £2,247, our data shows the cheapest flight currently is £311. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £509 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 (100%), 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.

£316+ 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 14 August 2026.

Sun 27/920:00 -

1 stop23h 55m

Sun 4/1023:00 -

2 stops32h 50m

Deal found 13/8£442

Thu 12/1109:20 -

3 stops33h 05m

Thu 26/1117:40 -

2 stops17h 55m

Deal found 10/8£467

Tue 1/920:00 -

2 stops24h 30m

Mon 7/917:00 -

2 stops18h 50m

Deal found 10/8£468

Wed 23/908:55 -

2 stops35h 04m

Wed 7/1017:20 -

2 stops18h 30m

Deal found 10/8£475

Wed 23/908:55 -

3 stops33h 20m

Wed 30/917:15 -

2 stops21h 15m

Deal found 9/8£482

Thu 5/1109:20 -

2 stops35h 20m

Mon 9/1118:30 -

2 stops20h 00m

Deal found 14/8£489

Thu 12/1109:20 -

2 stops35h 25m

Thu 26/1117:35 -

2 stops20h 55m

Deal found 10/8£492

Wed 9/909:20 -

3 stops35h 20m

Tue 15/917:10 -

2 stops18h 40m

Deal found 10/8£505

Wed 9/909:20 -

1 stop18h 05m

Tue 15/916:55 -

1 stop18h 55m

Deal found 10/8£509

Mon 21/917:20 -

2 stops27h 50m

Sun 27/917:40 -

2 stops18h 10m

Deal found 11/8£510

Thu 10/920:00 -

2 stops29h 05m

Wed 16/916:55 -

2 stops18h 55m

Deal found 10/8£515

Thu 12/1109:20 -

1 stop11h 55m

Thu 26/1117:45 -

1 stop17h 50m

Deal found 10/8£516

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 14 August 2026.

Sun 20/909:20 -

1 stop18h 05m

Mon 21/923:55 -

1 stop14h 35m

Deal found 14/8£549

Wed 9/909:15 -

2 stops14h 53m

Mon 21/909:20 -

2 stops18h 15m

Deal found 11/8£595

Sun 27/917:20 -

1 stop29h 25m

Sun 4/1008:25 -

2 stops16h 10m

Deal found 12/8£597

Wed 23/908:55 -

3 stops33h 20m

Wed 30/917:15 -

3 stops34h 20m

Deal found 9/8£599

Mon 9/1109:20 -

1 stop17h 10m

Mon 30/1120:15 -

1 stop15h 15m

Deal found 10/8£705

Wed 4/1108:40 -

2 stops19h 15m

Wed 11/1106:01 -

2 stops18h 09m

Deal found 10/8£706

Wed 9/909:20 -

1 stop10h 35m

Mon 21/917:25 -

1 stop10h 15m

Deal found 11/8£563

Sun 27/909:15 -

2 stops18h 55m

Sun 4/1012:15 -

2 stops15h 20m

Deal found 13/8£609

Thu 10/917:20 -

1 stop29h 25m

Thu 17/923:55 -

2 stops24h 50m

Deal found 10/8£612

Thu 29/1009:20 -

2 stops36h 00m

Thu 5/1121:00 -

1 stop14h 35m

Deal found 10/8£571

Thu 29/1009:20 -

2 stops36h 00m

Thu 5/1121:45 -

2 stops16h 45m

Deal found 11/8£634

Wed 23/909:15 -

2 stops17h 02m

Wed 30/911:59 -

2 stops15h 36m

Deal found 9/8£620

Mon 28/909:20 -

1 stop15h 05m

Mon 5/1020:55 -

1 stop17h 35m

Deal found 13/8£572

Mon 8/209:20 -

1 stop17h 10m

Mon 1/320:15 -

1 stop15h 15m

Deal found 10/8£705

Thu 29/1017:30 -

1 stop27h 25m

Thu 5/1117:45 -

1 stop18h 15m

Deal found 13/8£654

Wed 9/909:15 -

2 stops17h 02m

Tue 15/911:59 -

2 stops15h 46m

Deal found 12/8£620

Fri 11/920:00 -

2 stops46h 15m

Fri 18/923:00 -

1 stop14h 55m

Deal found 14/8£682

Thu 10/909:20 -

1 stop17h 05m

Thu 1/1020:10 -

1 stop15h 20m

Deal found 13/8£707

Tue 22/917:20 -

2 stops32h 00m

Mon 28/919:59 -

1 stop18h 31m

Deal found 10/8£591

Thu 10/909:05 -

1 stop13h 02m

Fri 25/919:10 -

1 stop16h 40m

Deal found 10/8£677

Wed 23/909:15 -

2 stops17h 02m

Wed 7/1012:55 -

2 stops14h 40m

Deal found 10/8£620

Sun 27/920:00 -

1 stop27h 15m

Sun 4/1006:00 -

2 stops21h 40m

Deal found 13/8£699

Wed 9/917:20 -

1 stop33h 05m

Wed 30/920:10 -

1 stop15h 20m

Deal found 12/8£716

Sat 21/1117:30 -

1 stop30h 31m

Sun 29/1119:25 -

1 stop16h 35m

Deal found 12/8£634

Wed 4/1117:30 -

1 stop28h 45m

Tue 10/1116:10 -

1 stop16h 50m

Deal found 10/8£701

Thu 14/108:40 -

2 stops18h 53m

Thu 28/108:55 -

2 stops15h 15m

Deal found 13/8£702

Tue 1/909:15 -

1 stop11h 30m

Mon 7/920:55 -

1 stop14h 55m

Deal found 10/8£639

Fri 13/1120:00 -

1 stop30h 30m

Fri 4/1220:15 -

1 stop28h 25m

Deal found 14/8£718

Thu 19/1108:40 -

1 stop10h 33m

Sat 28/1109:10 -

2 stops18h 45m

Deal found 12/8£634

Tue 3/1108:40 -

1 stop13h 35m

Wed 11/1107:00 -

2 stops17h 10m

Deal found 9/8£705

Find flight deals from Portsmouth to USA

Round-trip from	£442
One-way from	£316
Popular in	July
Cheapest in	February
Average price	£538

27/9-4/10
3 total stops
56h 45m total
Portsmouth to USA

Search Deals

25/10
3 total stops
51h 30m 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 (£10 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

SouthamptonNew York

SOU Southampton Eastleigh - JFK New York John F Kennedy Intl

SOUJFK

Southampton Eastleigh

Sun 20/9

09:20-22:25

1 stop18h 05m

New York John F Kennedy Intl

Mon 21/9

23:55-19:30

1 stop14h 35m

£549

Fastest return journey

SouthamptonBoston

SOU Southampton Eastleigh - BOS Boston Logan Intl

SOUBOS

Southampton Eastleigh

Wed 9/9

09:20-14:55

1 stop10h 35m

Boston Logan Intl

Mon 21/9

17:25-08:40

1 stop10h 15m

£563

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

21:00-16:35

1 stop14h 35m

£571

SouthamptonWashington, D.C.

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

SOUIAD

Southampton Eastleigh

Mon 28/9

09:20-19:25

1 stop15h 05m

Washington, D.C. Dulles Intl

Mon 5/10

20:55-19:30

1 stop17h 35m

£572

SouthamptonOrlando

SOU Southampton Eastleigh - MCO Orlando

SOUMCO

Southampton Eastleigh

Tue 22/9

17:20-20:20

2 stops32h 00m

Orlando

Mon 28/9

19:59-19:30

1 stop18h 31m

£591

SouthamptonBoston

SOU Southampton Eastleigh - BOS Boston Logan Intl

SOUBOS

Southampton Eastleigh

Wed 9/9

09:15-19:08

2 stops14h 53m

Boston Logan Intl

Mon 21/9

09:20-08:35

2 stops18h 15m

£595

SouthamptonLos Angeles

SOU Southampton Eastleigh - LAX Los Angeles

SOULAX

Southampton Eastleigh

Sun 27/9

17:20-14:45

1 stop29h 25m

Los Angeles

Sun 4/10

08:25-08:35

2 stops16h 10m

£597

SouthamptonNewark

SOU Southampton Eastleigh - EWR Newark

SOUEWR

Southampton Eastleigh

Wed 23/9

08:55-13:15

3 stops33h 20m

Newark

Wed 30/9

17:15-08:35

3 stops34h 20m

£599

SouthamptonBoston

SOU Southampton Eastleigh - BOS Boston Logan Intl

SOUBOS

Southampton Eastleigh

Sun 27/9

09:15-23:10

2 stops18h 55m

Boston Logan Intl

Sun 4/10

12:15-08:35

2 stops15h 20m

£609

SouthamptonLos Angeles

SOU Southampton Eastleigh - LAX Los Angeles

SOULAX

Southampton Eastleigh

Thu 10/9

17:20-14:45

1 stop29h 25m

Los Angeles

Thu 17/9

23:55-08:45

2 stops24h 50m

£612

Flights are sorted by cheapest return flights first.

Deals found on 13/8

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-BOS

SOU-IAD

SOU-EWR

SOU-JFK

SOU-MIA

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-BOS

SOU-IAD

SOU-EWR

SOU-JFK

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 15% 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 Monday, which is when the least amount of flights are scheduled (57 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

1,702 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

1,702 reviews

Aer Lingus

7.3

Good

1,702 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 14h 53m. The time it takes to get you to your destination can typically vary by up to 14h 32m. There are 3228 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 - San Francisco 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 (100%), 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 £2,247, our data shows the cheapest flight currently is £311. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £509 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

Browse thousands of different options on Cheapflights for your next trip

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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
Air Canada	Cheapest£116	Average£553	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Iberia	Cheapest£199	Average£561	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Delta	Cheapest£221	Average£617	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
TAP AIR PORTUGAL	Cheapest£223	Average£478	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
JetBlue	Cheapest£257	Average£602	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Icelandair	Cheapest£284	Average£445	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
SWISS	Cheapest£304	Average£475	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
Aer Lingus	Cheapest£314	Average£637	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
Hahn Air	Cheapest£315	Average£679	FlexibilityNo cancel fee	On-timeN/A	Search Hahn Air flights
Scandinavian Airlines	Cheapest£322	Average£493	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 £316

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 25/10. 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 14 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 14 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 14 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 14 August 2026.

Last-minute flights from Portsmouth to USADiscover last-minute flight deals from Portsmouth to USA. Data last updated 14 August 2026 and is based on user searches.

Discover last-minute flight deals from Portsmouth to USA. Data last updated 14 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 14 August 2026.

Search for one-way flight options from Portsmouth to USA. Find affordable one-way fares based on user searches. Data last updated 14 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 14 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 15% 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 14 August 2026.

The most flights from P0R to US0 are scheduled on a Monday (57 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (57 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 8 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 14 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 14 August 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 14 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 14 August 2026.

Last-minute flights from Portsmouth to USA
Discover last-minute flight deals from Portsmouth to USA. Data last updated 14 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 14 August 2026.