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 - Chicago O'Hare 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 £2,523, our data shows the cheapest flight currently is £395. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £459 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 Aeromexico (86%), KLM (82%) and Air France (82%).

What are the most popular airlines that fly from Portsmouth to USA?

Before booking your flight from Portsmouth to USA check out the most popular airlines for this route: American Airlines, Air Canada or Air France.

How far in advance should I book a flight from Portsmouth to USA?

To save up to 31% on this flight, we recommend booking at least 38 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portsmouth to USA from £388 1-2 weeks out and tickets from £609 for flights departing within the next 72 hours.

What is the cheapest month to fly from Portsmouth to USA?

Due to multiple factors, expect to potentially pay more when booking in July. For low rates, September can be a great choice for travel to USA. Flights to USA from Portsmouth in September are about £400 on average during September, but can be found for as low as £268.

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.

£283+ Flights from Portsmouth to the United States

Cheap flight deals from Portsmouth to USA

Round-trip from	£438
One-way from	£283
Popular in	July
Cheapest in	September
Average price	£440

1/10-8/10
4 total stops
56h 00m total
Portsmouth to USA

Search Deals

1/10
2 total stops
46h 15m total
Portsmouth to USA

Search Deals

Highest demand for flights based on searches. 7% potential increase in price (£24 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£6 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Portsmouth to USA

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 18 August 2025.

Wed 1/1009:10SOU - EWR

2 stops34h 45mMultiple Airlines

Wed 8/1017:15EWR - SOU

2 stops21h 15mMultiple Airlines

Deal found 17/8£438

Tue 30/909:10SOU - EWR

3 stops33h 05mMultiple Airlines

Tue 7/1017:15EWR - SOU

2 stops21h 15mMultiple Airlines

Deal found 16/8£448

Mon 22/917:35SOU - JFK

1 stop10h 15mDelta

Tue 7/1014:40JFK - SOU

2 stops13h 05mDelta

Deal found 17/8£459

Sun 24/817:35SOU - JFK

1 stop26h 50mKLM

Mon 8/900:50JFK - SOU

1 stop26h 55mKLM

Deal found 16/8£461

Wed 1/1009:20SOU - BOS

1 stop14h 00mKLM

Wed 8/1016:50BOS - SOU

1 stop10h 55mKLM

Deal found 17/8£462

Wed 1/1009:20SOU - LGA

2 stops18h 05mDelta

Wed 8/1012:59LGA - SOU

2 stops14h 46mDelta

Deal found 17/8£464

Wed 1/1009:20SOU - BOS

2 stops18h 10mDelta

Wed 8/1012:45BOS - SOU

2 stops15h 00mDelta

Deal found 17/8£478

Sun 7/909:20SOU - JFK

1 stop32h 00mDelta

Tue 16/910:30JFK - SOU

2 stops17h 15mDelta

Deal found 17/8£490

Sun 24/817:35SOU - JFK

1 stop23h 40mDelta

Tue 9/914:19JFK - SOU

2 stops13h 26mDelta

Deal found 16/8£491

Tue 30/909:20SOU - EWR

2 stops20h 36mDelta

Tue 7/1008:22EWR - SOU

2 stops19h 23mDelta

Deal found 16/8£492

Mon 25/809:20SOU - JFK

1 stop18h 30mDelta

Tue 2/917:30JFK - SOU

1 stop10h 15mDelta

Deal found 18/8£493

Fri 19/909:20SOU - LGA

2 stops18h 05mDelta

Tue 30/912:00LGA - SOU

2 stops15h 45mDelta

Deal found 16/8£493

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 18 August 2025.

Wed 1/1009:10SOU - EWR

2 stops34h 45mMultiple Airlines

Wed 8/1017:15EWR - SOU

2 stops21h 15mMultiple Airlines

Deal found 17/8£438

Mon 22/909:20SOU - JFK

1 stop18h 30mKLM

Tue 7/1017:30JFK - SOU

1 stop10h 15mKLM

Deal found 17/8£459

Mon 22/917:35SOU - JFK

1 stop10h 15mDelta

Tue 7/1014:40JFK - SOU

2 stops13h 05mDelta

Deal found 17/8£459

Wed 1/1009:20SOU - JFK

1 stop11h 05mVirgin Atlantic

Wed 8/1014:40JFK - SOU

2 stops13h 05mVirgin Atlantic

Deal found 17/8£459

Wed 1/1009:10SOU - MCO

1 stop13h 55mAer Lingus

Wed 8/1019:55MCO - SOU

1 stop18h 35mAer Lingus

Deal found 17/8£569

Fri 7/1109:30SOU - LGA

2 stops28h 17mBritish Airways

Tue 11/1111:22LGA - SOU

2 stops16h 23mBritish Airways

Deal found 17/8£601

Tue 30/909:10SOU - EWR

3 stops33h 05mMultiple Airlines

Tue 7/1017:15EWR - SOU

2 stops21h 15mMultiple Airlines

Deal found 16/8£448

Wed 1/1009:20SOU - JFK

1 stop11h 05mKLM

Wed 8/1017:30JFK - SOU

1 stop18h 30mKLM

Deal found 17/8£459

Wed 1/1009:20SOU - LGA

2 stops18h 05mDelta

Wed 8/1012:59LGA - SOU

2 stops14h 46mDelta

Deal found 17/8£464

Wed 1/1009:20SOU - LAX

1 stop13h 30mVirgin Atlantic

Wed 8/1016:50LAX - SOU

1 stop16h 10mVirgin Atlantic

Deal found 17/8£504

Sun 11/120:10SOU - MCO

2 stops29h 25mMultiple Airlines

Sun 25/117:50MCO - SOU

2 stops20h 50mMultiple Airlines

Deal found 16/8£460

Wed 1/1009:20SOU - BOS

1 stop14h 00mKLM

Wed 8/1016:50BOS - SOU

1 stop10h 55mKLM

Deal found 17/8£462

Last-minute flights from Portsmouth to USA
Discover last-minute flight deals from Portsmouth to USA. Data last updated 18 August 2025 and is based on user searches.

Sat 23/809:20SOU - JFK

2 stops27h 09mDelta

Tue 23/917:30JFK - SOU

1 stop10h 15mDelta

Deal found 16/8£524

Sat 23/809:20SOU - JFK

2 stops27h 09mDelta

Fri 26/921:10JFK - SOU

1 stop15h 20mDelta

Deal found 16/8£554

Sun 24/817:35SOU - JFK

1 stop23h 40mKLM

Tue 9/917:30JFK - SOU

1 stop10h 15mKLM

Deal found 16/8£461

Sun 24/817:35SOU - JFK

1 stop23h 40mDelta

Tue 9/914:19JFK - SOU

2 stops13h 26mDelta

Deal found 16/8£491

Sun 24/809:20SOU - LGA

2 stops18h 05mDelta

Tue 9/911:00LGA - SOU

2 stops16h 45mDelta

Deal found 16/8£518

Sun 24/814:50SOU - EWR

1 stop12h 40mMultiple Airlines

Tue 9/921:50EWR - SOU

3 stops29h 55mMultiple Airlines

Deal found 16/8£662

Mon 25/817:35SOU - JFK

1 stop10h 15mDelta

Tue 2/909:29JFK - SOU

2 stops18h 16mDelta

Deal found 18/8£493

Mon 25/817:35SOU - JFK

1 stop10h 15mDelta

Sun 31/817:30JFK - SOU

1 stop10h 15mDelta

Deal found 18/8£652

Mon 25/809:20SOU - JFK

1 stop18h 30mDelta

Tue 2/917:30JFK - SOU

1 stop10h 15mDelta

Deal found 18/8£493

Tue 26/809:20SOU - JFK

2 stops18h 05mDelta

Mon 1/900:50JFK - SOU

1 stop26h 55mDelta

Deal found 18/8£497

Tue 26/809:20SOU - JFK

2 stops18h 05mDelta

Wed 3/912:58JFK - SOU

2 stops14h 47mDelta

Deal found 18/8£497

Thu 28/817:35SOU - JFK

1 stop23h 40mDelta

Wed 3/917:30JFK - SOU

1 stop10h 15mDelta

Deal found 18/8£523

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 18 August 2025.

Wed 1/1020:00SOU - EWR

2 stops46h 15mMultiple Airlines

Deal found 17/8£283

Wed 1/1009:10SOU - JFK

2 stops36h 50mMultiple Airlines

Deal found 17/8£292

Thu 30/1017:55SOU - MCO

2 stops29h 45mMultiple Airlines

Deal found 17/8£296

Thu 4/915:45SOU - LAS

3 stops38h 08mMultiple Airlines

Deal found 16/8£326

Wed 1/1009:00SOU - LGA

3 stops53h 00mMultiple Airlines

Deal found 17/8£350

Fri 29/816:25SOU - BOS

3 stops46h 14mMultiple Airlines

Deal found 16/8£381

Tue 30/920:00SOU - LAS

3 stops57h 19mMultiple Airlines

Deal found 16/8£390

Thu 30/1009:30SOU - MCO

1 stop13h 40mAer Lingus

Deal found 17/8£404

Wed 1/1020:00SOU - EWR

1 stop25h 05mAer Lingus

Deal found 17/8£412

Wed 1/1009:10SOU - MCO

1 stop13h 55mAer Lingus

Deal found 17/8£417

Fri 28/1109:30SOU - LAX

1 stop17h 00mAer Lingus

Deal found 16/8£440

Wed 1/1015:45SOU - MCO

2 stops31h 40mMultiple Airlines

Deal found 17/8£443

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

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Wed 1/10

09:10-14:55

2 stops34h 45m

Newark

Wed 8/10

17:15-19:30

2 stops21h 15m

£438

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Tue 30/9

09:10-13:15

3 stops33h 05m

Newark

Tue 7/10

17:15-19:30

2 stops21h 15m

£448

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 22/9

09:20-22:50

1 stop18h 30m

New York John F Kennedy Intl

Tue 7/10

17:30-08:45

1 stop10h 15m

£459

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Mon 22/9

17:35-22:50

1 stop10h 15m

New York John F Kennedy Intl

Tue 7/10

14:40-08:45

2 stops13h 05m

£459

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Wed 1/10

09:20-15:25

1 stop11h 05m

New York John F Kennedy Intl

Wed 8/10

14:40-08:45

2 stops13h 05m

£459

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Wed 1/10

09:20-15:25

1 stop11h 05m

New York John F Kennedy Intl

Wed 8/10

17:30-17:00

1 stop18h 30m

£459

SouthamptonOrlando

SOU - MCO

SOUMCO

Southampton Eastleigh

Sun 11/1

20:10-20:35

2 stops29h 25m

Orlando

Sun 25/1

17:50-19:40

2 stops20h 50m

£460

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Wed 1/10

09:20-18:20

1 stop14h 00m

Boston Logan Intl

Wed 8/10

16:50-08:45

1 stop10h 55m

£462

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Wed 1/10

09:20-22:25

2 stops18h 05m

New York LaGuardia

Wed 8/10

12:59-08:45

2 stops14h 46m

£464

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Wed 1/10

09:20-22:30

2 stops18h 10m

Boston Logan Intl

Wed 8/10

12:45-08:45

2 stops15h 00m

£478

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 60 results

...

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.

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

What is the cheapest month to book a flight from Portsmouth to USA?

Currently, January is the cheapest month in which you can book a flight from Portsmouth to USA (average of £575). Flying from Portsmouth to USA in July is currently the most expensive (average of £811). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from P0R to US?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portsmouth to USA as you normally would.

Weekly flight availability from Portsmouth to USA

The most flights from P0R to US0 are scheduled on a Saturday (54 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (53 on average).

Reviews of airlines servicing USA

Get a feel of what it's like to fly with KLM, Virgin Atlantic, andAer 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.

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

KLM

7.8

Good

1,385 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Virgin Atlantic

7.4

Good

657 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Aer Lingus

7.2

Good

1,220 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

British Airways

6.7

Okay

7,277 reviews

KLM

7.8

Good

1,385 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Anonymous,Jun 2025

AMS - BOS

A two and half hour delay caused havoc with all connections. Otherwise on board service was great.

Related info for your journey

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 - Chicago O'Hare 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 Aeromexico (86%), KLM (82%) and Air France (82%).
What are the cheapest flights from Portsmouth to USA?
While on average a flight from Portsmouth to USA is generally £2,523, our data shows the cheapest flight currently is £395. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £459 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.
What is the cheapest month to book a flight from Portsmouth to USA?
Currently, January is the cheapest month in which you can book a flight from Portsmouth to USA (average of £575). Flying from Portsmouth to USA in July is currently the most expensive (average of £811). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 10 airlines flying from Portsmouth to USA

Airline	Cheapest	Average	Flexibility	On-time
Aer Lingus	Cheapest£7	Average£542	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
JetBlue	Cheapest£89	Average£576	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Delta	Cheapest£235	Average£607	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£263	Average£356	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
TAP AIR PORTUGAL	Cheapest£277	Average£482	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
SWISS	Cheapest£289	Average£456	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
United Airlines	Cheapest£292	Average£526	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Scandinavian Airlines	Cheapest£296	Average£510	FlexibilityNo cancel fee	On-time77%	Search Scandinavian Airlines flights
Icelandair	Cheapest£299	Average£537	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air Canada	Cheapest£307	Average£522	FlexibilityNo cancel fee	On-time67%	Search Air Canada 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 £283

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 1/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Portsmouth to USA

Keep the following information in mind while searching for Portsmouth to USA flight deals. Data was last updated 18 August 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find 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 18 August 2025.

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 18 August 2025.

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

Everything you need to know about your flight from Portsmouth to the United States

What is the cheapest month to book a flight from Portsmouth to USA?

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 18 August 2025.

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 18 August 2025.

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 18 August 2025.

Get a feel of what it's like to fly with KLM, Virgin Atlantic, andAer 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

Find useful and relevant information for your journey from Portsmouth to USA. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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?

What is the cheapest month to book a flight 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.

Top 10 airlines flying from Portsmouth to USA

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Portsmouth to USA?

Why should you use Cheapflights to find cheap flight tickets from Portsmouth to USA?

Can Cheapflights find flights from Portsmouth to USA with no change fees?

Can Cheapflights notify me if prices for flights from Portsmouth to USA become cheaper?

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Travel Smart

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 18 August 2025.