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Cheap flights from Portsmouth to North America from £289

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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
21 Dec — 28 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portsmouth to North America

Keep the following information in mind while searching for Portsmouth to North America flight deals. Data was last updated 21 November 2025.

Round-trip from

£403

One-way from

£289

Popular in

December

Cheapest in

September

Average price

£403
22/1-28/1
  • 22/1-28/1
  • 4 total stops
  • 56h 20m total
  • Portsmouth to North America
Search Deals
15/12
  • 15/12
  • 2 total stops
  • 19h 00m total
  • Portsmouth to North America
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£19 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 November 2025
Search Deals

Find flight deals from Portsmouth to North America

Enter your travel dates to find the best prices.

Cheapest flights from Portsmouth to North America
Explore the most affordable flight options available from Portsmouth to North America. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 November 2025.

Fri 5/1217:30SOU - MIA
2 stops30h 40mDelta
Mon 8/1207:12MIA - SOU
2 stops19h 58mDelta
Deal found 18/11£485
Mon 24/1119:55SOU - JFK
2 stops29h 10mMultiple Airlines
Sun 30/1100:30JFK - SOU
2 stops27h 20mMultiple Airlines
Deal found 19/11£493
Fri 26/1208:40SOU - LAS
2 stops17h 44mDelta
Thu 8/108:01LAS - SOU
2 stops16h 24mDelta
Deal found 20/11£542
Fri 26/1208:40SOU - LAS
2 stops17h 44mDelta
Sun 11/115:45LAS - SOU
2 stops33h 05mDelta
Deal found 20/11£545
Fri 26/1208:40SOU - LAS
2 stops17h 44mDelta
Mon 5/116:05LAS - SOU
1 stop17h 00mDelta
Deal found 20/11£583
Tue 23/1217:30SOU - MIA
2 stops36h 01mDelta
Thu 8/107:40MIA - SOU
2 stops19h 45mDelta
Deal found 20/11£649
Tue 23/1217:30SOU - YYZ
1 stop27h 10mDelta
Tue 21/416:45YYZ - SOU
1 stop11h 05mDelta
Deal found 19/11£651
Thu 4/1209:30SOU - YYZ
1 stop11h 25mBritish Airways
Mon 22/1217:25YYZ - SOU
1 stop13h 30mBritish Airways
Deal found 19/11£669
Tue 23/1217:30SOU - YYZ
1 stop27h 10mDelta
Sun 19/418:45YYZ - SOU
2 stops33h 05mDelta
Deal found 19/11£672
Wed 3/1216:05SOU - YYZ
1 stop28h 50mBritish Airways
Mon 22/1217:25YYZ - SOU
1 stop13h 30mBritish Airways
Deal found 19/11£675
Mon 8/1209:30SOU - YYZ
1 stop11h 25mBritish Airways
Mon 22/1217:25YYZ - SOU
1 stop13h 30mBritish Airways
Deal found 19/11£677
Tue 23/1217:30SOU - YYZ
1 stop27h 10mDelta
Mon 20/409:45YYZ - SOU
2 stops18h 05mDelta
Deal found 19/11£678

Cheapflights Fare Finder

 
Customise your flight search to find flights from Portsmouth to North America that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 November 2025.
Use the filters below to find and compare flights from Portsmouth to North America that are best for you.

Fly from

Portsmouth

Fly to

North America

Route

Depart

Return

Price

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Thu 22/1

16:05-13:25

3 stops26h 20m

Newark

Wed 28/1

17:30-08:25

3 stops33h 55m

£484

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Fri 5/12

17:30-19:10

2 stops30h 40m

Miami

Mon 8/12

07:12-08:10

2 stops19h 58m

£485

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Thu 22/1

09:30-16:15

1 stop11h 45m

Newark

Wed 28/1

17:45-08:45

1 stop10h 00m

£510

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Wed 28/1

17:30-19:33

2 stops31h 03m

Miami

Sun 1/2

13:21-08:50

2 stops14h 29m

£529

SouthamptonLas Vegas

SOU - LAS

SOULAS

Southampton Eastleigh

Fri 26/12

08:40-18:24

2 stops17h 44m

Las Vegas Harry Reid Intl

Thu 8/1

08:01-08:25

2 stops16h 24m

£542

SouthamptonLas Vegas

SOU - LAS

SOULAS

Southampton Eastleigh

Fri 26/12

08:40-23:44

2 stops23h 04m

Las Vegas Harry Reid Intl

Tue 6/1

16:05-17:05

1 stop17h 00m

£542

SouthamptonLas Vegas

SOU - LAS

SOULAS

Southampton Eastleigh

Sat 3/1

17:30-21:54

2 stops36h 24m

Las Vegas Harry Reid Intl

Sat 10/1

15:45-08:50

2 stops33h 05m

£547

SouthamptonLas Vegas

SOU - LAS

SOULAS

Southampton Eastleigh

Thu 22/1

09:00-14:15

1 stop13h 15m

Las Vegas Harry Reid Intl

Mon 26/1

06:15-17:00

2 stops26h 45m

£566

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Wed 28/1

17:35-14:50

1 stop26h 15m

Miami

Sun 1/2

19:25-17:05

2 stops16h 40m

£567

SouthamptonNew York

SOU - LGA

SOULGA

Southampton Eastleigh

Mon 12/1

09:25-20:30

2 stops16h 05m

New York LaGuardia

Wed 28/1

13:05-08:25

2 stops14h 20m

£567

Flights are sorted by cheapest return flights first.

Deals found on 20/11

Showing 1-10 of 60 results
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Best time to book a flight from Portsmouth to North America

Have a flexible travel schedule? Discover the best time to fly to North America 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 North America

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

Currently, October is the cheapest month in which you can book a flight from Portsmouth to North America (average of £93). Flying from Portsmouth to North America in December is currently the most expensive (average of £308). 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 NA?

Find hourly flight availability from Portsmouth to North America. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 21 November 2025.

One of the essential ways to save on airfare from Portsmouth to North America is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 7% on airfare.

What is the cheapest day to fly from Portsmouth to North America?

Use this chart to determine the cheapest time to fly return from Portsmouth to North America. Price data was last updated on 16 December 2024.

Travellers seeking maximum savings on their Portsmouth to North America flight should consider departing on Wednesday evenings when fares are most often at their lowest. Saturday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Portsmouth to North America

Explore weekly flight availability from Portsmouth to North America. 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 21 November 2025.

The most flights from P0R to 0NA are scheduled on a Tuesday (44 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (36 on average).

Reviews of airlines servicing North America

Get insights into the airlines that provide service to North America. 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 North America. Reviews last updated 21 November 2025.
Get a feel of what it's like to fly with KLM, Virgin Atlantic, andAer Lingus from Portsmouth to North America by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,414 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
KLM
7.7
Good
1,414 reviews
KLM
7.7
Good
1,414 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Virgin Atlantic
7.5
Good
674 reviews
KLM
7.7
Good
1,414 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.
Aer Lingus
7.2
Good
1,377 reviews
KLM
7.7
Good
1,414 reviews
Check prices

Comfort

7.7

Entertainment

7.1

Crew

8.4

Food

7.3

Overall

7.7

Boarding

7.8

Reviews

1 / 20
2.0
Mediocre

Abisola,Oct 2025

LOS - CDG

The food option was finished and what wa left was vegan pasta so I had to go without food for an 8 hour flight without any sort of empathy from crew that was mean.

Related info for your journey

Find useful and relevant information for your journey from Portsmouth to North America. 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 North America?

    A quick flight from Portsmouth to North America can take about 11h 45m. Delta provides one of the quickest options available for as low as £510. The distance between Portsmouth and North America is about 3428 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from Portsmouth to North America?

    The most popular route from Portsmouth to North America is Southampton Eastleigh - New York John F Kennedy Intl. You may also consider Southampton Eastleigh - Newark or Southampton Eastleigh - New York LaGuardia.

  • What are the most reliable airlines from Portsmouth to North America?

    No one likes to see their flight delayed. When booking a flight from Portsmouth to North America consider choosing SriLankan Airlines (82%), KLM (82%) or Air Canada (82%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Portsmouth to North America?

    On average you can expect to pay £2,603 for a flight from Portsmouth to North America. The cheapest flight overall is £353 while the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl) is currently priced at £403.

  • Can I find deals for flights from Portsmouth to North America that include hotel bookings?

    Yes. In addition to deals on Portsmouth to North America flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Portsmouth to North America?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portsmouth to North America.

  • Can I find deals for business class flights from Portsmouth to North America?

    Yes. Cheapflights offers flight deals from Portsmouth to North America 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 North America?

    Currently, October is the cheapest month in which you can book a flight from Portsmouth to North America (average of £93). Flying from Portsmouth to North America in December is currently the most expensive (average of £308). 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

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Top 10 airlines flying from Portsmouth to North America

Discover the top 10 airlines that operate flights from Portsmouth to North America. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 21 November 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£93Average£610FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapest£244Average£663FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
PLAYCheapest£275Average£395FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
TAP AIR PORTUGALCheapest£290Average£495FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapest£293Average£545FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
SWISSCheapest£300Average£466FlexibilityNo cancel feeOn-time79%
Search SWISS flights
AeromexicoCheapest£305Average£681FlexibilityNo cancel feeOn-timeN/A
Search Aeromexico flights
IcelandairCheapest£306Average£523FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£307Average£518FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£311Average£647FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Portsmouth to North America?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to North America from Portsmouth today with Cheapflights!

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

Cheapflights helps you find that perfect flight to North America from Portsmouth by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes! Cheapflights helps users easily find flights from Portsmouth to North America with no change fees.

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

Yes, Cheapflights offers price alerts on Portsmouth to North America flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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