How long is the flight from Portsmouth to USA?

Airlines like Virgin Atlantic, Delta, and KLM fly from Portsmouth to USA in about 14h 55m. The time it takes to get you to your destination can typically vary by up to 16h 20m. 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 - New York John F Kennedy Intl, Southampton Eastleigh - Newark or Southampton Eastleigh - New York LaGuardia 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 £2,662, our data shows the cheapest flight currently is £355. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £383 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 (89%), Aeromexico (86%) and KLM (86%).

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.

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.

£310+ Flights from Portsmouth to the United States

Cheap flight deals from Portsmouth to USA

Round-trip from	£367
One-way from	£310
Popular in	December
Cheapest in	September
Average price	£352

3/11-6/11
5 total stops
47h 40m total
Portsmouth to USA

Search Deals

31/10
3 total stops
59h 40m total
Portsmouth to USA

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (£9 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 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 September 2025.

Mon 3/1116:05SOU - EWR

3 stops26h 30mMultiple Airlines

Thu 6/1117:30EWR - SOU

2 stops21h 10mMultiple Airlines

Deal found 16/9£367

Mon 3/1116:05SOU - JFK

2 stops28h 40mMultiple Airlines

Thu 6/1117:35JFK - SOU

2 stops21h 05mMultiple Airlines

Deal found 16/9£383

Thu 25/917:35SOU - JFK

1 stop23h 45mKLM

Wed 8/1017:30JFK - SOU

1 stop10h 15mKLM

Deal found 16/9£393

Sat 1/1109:25SOU - JFK

1 stop14h 55mKLM

Sat 8/1116:45JFK - SOU

1 stop11h 05mKLM

Deal found 16/9£418

Thu 25/909:20SOU - JFK

1 stop11h 05mDelta

Wed 8/1014:40JFK - SOU

2 stops13h 05mDelta

Deal found 16/9£418

Sat 1/1109:25SOU - JFK

1 stop14h 55mVirgin Atlantic

Sat 8/1112:59JFK - SOU

2 stops14h 51mVirgin Atlantic

Deal found 16/9£420

Thu 25/909:20SOU - LGA

2 stops17h 09mDelta

Wed 8/1012:59LGA - SOU

2 stops14h 46mDelta

Deal found 16/9£422

Sat 1/1109:25SOU - EWR

2 stops17h 45mDelta

Sat 8/1112:55EWR - SOU

2 stops14h 55mDelta

Deal found 16/9£424

Sat 1/1109:25SOU - LGA

2 stops15h 38mDelta

Sat 8/1113:00LGA - SOU

2 stops14h 50mDelta

Deal found 16/9£427

Thu 25/909:20SOU - EWR

2 stops18h 41mDelta

Wed 8/1015:40EWR - SOU

2 stops12h 05mDelta

Deal found 16/9£429

Fri 31/1009:30SOU - BOS

1 stop14h 25mAer Lingus

Fri 7/1117:10BOS - SOU

1 stop10h 35mAer Lingus

Deal found 16/9£445

Mon 3/1109:30SOU - JFK

1 stop14h 55mAer Lingus

Thu 6/1121:10JFK - SOU

1 stop17h 30mAer Lingus

Deal found 16/9£445

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 September 2025.

Sat 1/1109:25SOU - JFK

1 stop14h 55mVirgin Atlantic

Sat 8/1112:59JFK - SOU

2 stops14h 51mVirgin Atlantic

Deal found 16/9£420

Sat 1/1109:25SOU - EWR

2 stops17h 45mDelta

Sat 8/1112:55EWR - SOU

2 stops14h 55mDelta

Deal found 16/9£424

Tue 13/109:25SOU - JFK

1 stop31h 15mKLM

Sat 31/117:45JFK - SOU

1 stop18h 30mKLM

Deal found 17/9£426

Fri 31/1009:30SOU - BOS

1 stop14h 25mAer Lingus

Fri 7/1117:10BOS - SOU

1 stop10h 35mAer Lingus

Deal found 16/9£445

Mon 3/1119:55SOU - EWR

2 stops31h 15mMultiple Airlines

Wed 5/1100:20EWR - SOU

3 stops38h 20mMultiple Airlines

Deal found 16/9£455

Sat 8/1109:30SOU - EWR

1 stop11h 45mBritish Airways

Thu 20/1117:45EWR - SOU

1 stop10h 00mBritish Airways

Deal found 17/9£521

Sat 1/1109:25SOU - LGA

2 stops15h 38mDelta

Sat 8/1113:00LGA - SOU

2 stops14h 50mDelta

Deal found 16/9£427

Sun 2/1118:05SOU - BOS

1 stop29h 50mKLM

Sun 9/1120:50BOS - SOU

1 stop30h 20mKLM

Deal found 17/9£454

Sun 2/1118:05SOU - BOS

1 stop24h 15mVirgin Atlantic

Sun 9/1109:59BOS - SOU

2 stops17h 11mVirgin Atlantic

Deal found 17/9£465

Tue 13/109:25SOU - LGA

2 stops15h 10mDelta

Sat 31/117:00LGA - SOU

2 stops19h 15mDelta

Deal found 17/9£430

Sat 1/1109:30SOU - EWR

1 stop11h 45mAer Lingus

Sat 8/1117:45EWR - SOU

1 stop10h 00mAer Lingus

Deal found 16/9£491

Fri 31/1008:10SOU - BOS

3 stops35h 25mMultiple Airlines

Fri 7/1118:05BOS - SOU

2 stops15h 45mMultiple Airlines

Deal found 16/9£497

Tue 13/109:25SOU - JFK

2 stops18h 54mDelta

Sat 31/114:00JFK - SOU

2 stops22h 15mDelta

Deal found 17/9£430

Wed 15/1009:10SOU - BOS

1 stop10h 30mBritish Airways

Wed 22/1017:30BOS - SOU

1 stop10h 10mBritish Airways

Deal found 16/9£527

Sat 1/1109:25SOU - SFO

2 stops20h 05mKLM

Sat 8/1107:15SFO - SOU

2 stops17h 35mKLM

Deal found 17/9£484

Sat 1/1109:30SOU - SFO

1 stop14h 05mAer Lingus

Sat 8/1117:20SFO - SOU

1 stop18h 20mAer Lingus

Deal found 17/9£503

Fri 3/1009:20SOU - ORD

2 stops20h 34mVirgin Atlantic

Tue 7/1016:15ORD - SOU

1 stop10h 30mVirgin Atlantic

Deal found 17/9£504

Tue 13/109:25SOU - EWR

2 stops18h 38mDelta

Sat 31/117:00EWR - SOU

2 stops19h 15mDelta

Deal found 17/9£430

Fri 31/1020:10SOU - MIA

2 stops23h 40mMultiple Airlines

Fri 7/1116:35MIA - SOU

2 stops17h 15mMultiple Airlines

Deal found 16/9£525

Sat 8/1109:30SOU - LGA

2 stops28h 08mBritish Airways

Thu 20/1113:20LGA - SOU

2 stops14h 25mBritish Airways

Deal found 17/9£530

Fri 31/1017:30SOU - ORD

1 stop26h 50mKLM

Fri 7/1116:25ORD - SOU

1 stop10h 25mKLM

Deal found 16/9£498

Sat 1/1109:30SOU - LAX

1 stop17h 00mAer Lingus

Sat 8/1120:15LAX - SOU

1 stop15h 25mAer Lingus

Deal found 17/9£521

Thu 5/318:05SOU - ORD

1 stop26h 15mVirgin Atlantic

Mon 9/317:25ORD - SOU

1 stop18h 35mVirgin Atlantic

Deal found 15/9£534

Thu 6/1108:50SOU - JFK

1 stop11h 55mDelta

Fri 14/1117:45JFK - SOU

1 stop10h 05mDelta

Deal found 15/9£448

Fri 7/1109:30SOU - LGA

2 stops16h 56mBritish Airways

Fri 14/1113:20LGA - SOU

2 stops14h 25mBritish Airways

Deal found 15/9£544

Wed 8/1009:20SOU - ORD

2 stops17h 59mKLM

Tue 14/1016:15ORD - SOU

1 stop10h 30mKLM

Deal found 17/9£504

Sun 2/1109:30SOU - BOS

1 stop14h 25mMultiple Airlines

Sun 9/1117:10BOS - SOU

3 stops19h 25mMultiple Airlines

Deal found 17/9£574

Sat 7/309:25SOU - MIA

1 stop34h 25mVirgin Atlantic

Wed 11/314:03MIA - SOU

2 stops23h 22mVirgin Atlantic

Deal found 15/9£535

Sat 8/1109:25SOU - JFK

1 stop11h 20mDelta

Fri 14/1110:07JFK - SOU

2 stops17h 43mDelta

Deal found 15/9£448

Fri 3/1008:40SOU - EWR

2 stops34h 15mBritish Airways

Sun 5/1017:35EWR - SOU

1 stop10h 35mBritish Airways

Deal found 17/9£561

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

Thu 25/917:35SOU - JFK

1 stop23h 45mKLM

Wed 8/1017:30JFK - SOU

1 stop10h 15mKLM

Deal found 16/9£393

Thu 25/909:20SOU - JFK

1 stop11h 05mDelta

Wed 8/1014:40JFK - SOU

2 stops13h 05mDelta

Deal found 16/9£418

Thu 25/909:20SOU - LGA

2 stops17h 09mDelta

Wed 8/1012:59LGA - SOU

2 stops14h 46mDelta

Deal found 16/9£422

Thu 25/909:20SOU - EWR

2 stops18h 41mDelta

Wed 8/1015:40EWR - SOU

2 stops12h 05mDelta

Deal found 16/9£429

Fri 3/1009:20SOU - ORD

2 stops20h 34mVirgin Atlantic

Tue 7/1016:15ORD - SOU

1 stop10h 30mVirgin Atlantic

Deal found 17/9£504

Fri 3/1009:20SOU - ORD

2 stops14h 44mKLM

Tue 7/1011:23ORD - SOU

2 stops15h 22mKLM

Deal found 17/9£511

Fri 31/1009:30SOU - BOS

1 stop14h 25mAer Lingus

Fri 7/1117:10BOS - SOU

1 stop10h 35mAer Lingus

Deal found 16/9£445

Fri 31/1008:40SOU - BOS

1 stop15h 15mDelta

Fri 7/1106:00BOS - SOU

2 stops21h 50mDelta

Deal found 16/9£482

Fri 31/1008:10SOU - BOS

3 stops35h 25mMultiple Airlines

Fri 7/1118:05BOS - SOU

2 stops15h 45mMultiple Airlines

Deal found 16/9£497

Fri 31/1017:30SOU - ORD

1 stop26h 50mKLM

Fri 7/1116:25ORD - SOU

1 stop10h 25mKLM

Deal found 16/9£498

Fri 31/1008:40SOU - MCO

1 stop13h 15mKLM

Fri 7/1119:30MCO - SOU

1 stop16h 30mKLM

Deal found 16/9£520

Fri 31/1020:10SOU - MIA

2 stops23h 40mMultiple Airlines

Fri 7/1116:35MIA - SOU

2 stops17h 15mMultiple Airlines

Deal found 16/9£525

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 September 2025.

Fri 31/1008:10SOU - MIA

3 stops59h 40mMultiple Airlines

Deal found 16/9£310

Sat 11/1015:20SOU - JFK

3 stops50h 00mMultiple Airlines

Deal found 17/9£318

Fri 9/120:00SOU - BOS

1 stop29h 55mMultiple Airlines

Deal found 17/9£319

Sat 11/1008:25SOU - EWR

3 stops33h 50mMultiple Airlines

Deal found 17/9£334

Sun 12/1009:10SOU - JFK

3 stops32h 10mMultiple Airlines

Deal found 17/9£370

Tue 9/1212:25SOU - JFK

1 stop12h 00mBritish Airways

Deal found 15/9£379

Sun 7/1209:30SOU - JFK

1 stop14h 55mBritish Airways

Deal found 15/9£380

Sun 11/120:10SOU - JFK

1 stop28h 19mBritish Airways

Deal found 16/9£385

Sat 11/1016:25SOU - JFK

2 stops29h 50mAer Lingus

Deal found 17/9£386

Mon 29/908:05SOU - JFK

2 stops57h 15mMultiple Airlines

Deal found 18/9£397

Sat 10/117:15SOU - JFK

1 stop29h 05mBritish Airways

Deal found 15/9£398

Mon 8/1219:40SOU - JFK

2 stops28h 45mBritish Airways

Deal found 15/9£401

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

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Sat 1/11

09:25-20:20

1 stop14h 55m

New York John F Kennedy Intl

Sat 8/11

12:59-08:50

2 stops14h 51m

£420

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Sat 1/11

09:25-23:10

2 stops17h 45m

Newark

Sat 8/11

12:55-08:50

2 stops14h 55m

£424

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Tue 13/1

09:25-11:40

1 stop31h 15m

New York John F Kennedy Intl

Sat 31/1

17:45-17:15

1 stop18h 30m

£426

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Sat 1/11

09:25-21:03

2 stops15h 38m

New York LaGuardia

Sat 8/11

13:00-08:50

2 stops14h 50m

£427

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Tue 13/1

09:25-19:35

2 stops15h 10m

New York LaGuardia

Sat 31/1

17:00-17:15

2 stops19h 15m

£430

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Tue 13/1

09:25-23:19

2 stops18h 54m

New York John F Kennedy Intl

Sat 31/1

14:00-17:15

2 stops22h 15m

£430

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Tue 13/1

09:25-23:03

2 stops18h 38m

Newark

Sat 31/1

17:00-17:15

2 stops19h 15m

£430

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 31/10

09:30-19:55

1 stop14h 25m

Boston Logan Intl

Fri 7/11

17:10-08:45

1 stop10h 35m

£445

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Thu 6/11

08:50-15:45

1 stop11h 55m

New York John F Kennedy Intl

Fri 14/11

17:45-08:50

1 stop10h 05m

£448

SouthamptonNew York

SOU - JFK

SOUJFK

Southampton Eastleigh

Sat 8/11

09:25-15:45

1 stop11h 20m

New York John F Kennedy Intl

Fri 14/11

10:07-08:50

2 stops17h 43m

£448

Flights are sorted by cheapest return flights first.

Deals found on 16/9

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, September is the cheapest month in which you can book a flight from Portsmouth to USA (average of £573). 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 Wednesday (53 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (47 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

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

KLM

7.8

Good

1,386 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Virgin Atlantic

7.4

Good

664 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Aer Lingus

7.2

Good

1,277 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

British Airways

6.7

Okay

7,367 reviews

KLM

7.8

Good

1,386 reviews

Check prices

Reviews

1 / 20

4.0

Okay

Mark,Sept 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

How long is the flight from Portsmouth to USA?
Airlines like Virgin Atlantic, Delta, and KLM fly from Portsmouth to USA in about 14h 55m. The time it takes to get you to your destination can typically vary by up to 16h 20m. 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 - New York John F Kennedy Intl, Southampton Eastleigh - Newark or Southampton Eastleigh - New York LaGuardia 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 (89%), Aeromexico (86%) and KLM (86%).
What are the cheapest flights from Portsmouth to USA?
While on average a flight from Portsmouth to USA is generally £2,662, our data shows the cheapest flight currently is £355. When looking at the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl), you can expect to pay £383 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, September is the cheapest month in which you can book a flight from Portsmouth to USA (average of £573). 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
Turkish Airlines	Cheapest£7	Average£775	FlexibilityNo cancel fee	On-time77%	Search Turkish Airlines flights
Aer Lingus	Cheapest£7	Average£568	FlexibilityNo cancel fee	On-timeN/A	Search Aer Lingus flights
JetBlue	Cheapest£89	Average£565	FlexibilityNo cancel fee	On-time62%	Search JetBlue flights
Delta	Cheapest£234	Average£603	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
PLAY	Cheapest£246	Average£367	FlexibilityNo cancel fee	On-timeN/A	Search PLAY flights
TAP AIR PORTUGAL	Cheapest£276	Average£467	FlexibilityNo cancel fee	On-timeN/A	Search TAP AIR PORTUGAL flights
Austrian Airlines	Cheapest£284	Average£478	FlexibilityNo cancel fee	On-time78%	Search Austrian Airlines flights
SWISS	Cheapest£287	Average£444	FlexibilityNo cancel fee	On-time79%	Search SWISS flights
United Airlines	Cheapest£291	Average£512	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Icelandair	Cheapest£292	Average£521	FlexibilityNo cancel fee	On-time76%	Search Icelandair 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.

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

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from Portsmouth to the United States from £310

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 31/10. 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 September 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 September 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 September 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 September 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 September 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 September 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.

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?

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?

100% Free

Book with Flexibility

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 September 2025.