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Cheap flights from Portsmouth to North America from £285

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 15/1. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
13 Dec — 20 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 13 November 2025.

Round-trip from

£423

One-way from

£285

Popular in

December

Cheapest in

September

Average price

£397
3/12-9/12
  • 3/12-9/12
  • 5 total stops
  • 47h 15m total
  • Portsmouth to North America
Search Deals
15/1
  • 15/1
  • 3 total stops
  • 33h 05m total
  • Portsmouth to North America
Search Deals
Highest demand for flights based on searches. 5% potential increase in price (£17 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 13 November 2025.

Wed 3/1212:25SOU - EWR
3 stops30h 10mMultiple Airlines
Tue 9/1217:30EWR - SOU
2 stops17h 05mMultiple Airlines
Deal found 12/11£418
Thu 4/1218:05SOU - MIA
1 stop25h 45mKLM
Tue 9/1216:50MIA - SOU
1 stop19h 10mKLM
Deal found 11/11£489
Thu 27/1108:50SOU - MIA
2 stops20h 56mDelta
Thu 4/1216:50MIA - SOU
1 stop19h 10mDelta
Deal found 11/11£493
Sat 15/1117:30SOU - LAX
1 stop26h 15mDelta
Wed 3/1221:55LAX - SOU
2 stops26h 10mDelta
Deal found 12/11£506
Thu 13/1118:05SOU - LAX
1 stop25h 40mDelta
Mon 1/1213:45LAX - SOU
1 stop19h 15mDelta
Deal found 12/11£508
Sat 15/1109:25SOU - LAX
2 stops19h 19mDelta
Mon 1/1208:55LAX - SOU
2 stops24h 05mDelta
Deal found 12/11£511
Wed 3/1212:25SOU - JFK
2 stops32h 20mMultiple Airlines
Tue 9/1217:35JFK - SOU
2 stops17h 00mMultiple Airlines
Deal found 12/11£514
Thu 18/1208:50SOU - LAS
1 stop13h 25mMultiple Airlines
Thu 25/1216:05LAS - SOU
1 stop16h 55mMultiple Airlines
Deal found 11/11£525
Mon 24/1109:30SOU - JFK
1 stop14h 55mAer Lingus
Tue 9/1221:10JFK - SOU
1 stop13h 25mAer Lingus
Deal found 10/11£536
Thu 11/1220:10SOU - JFK
2 stops22h 05mMultiple Airlines
Sun 14/1221:15JFK - SOU
1 stop17h 25mMultiple Airlines
Deal found 11/11£539
Thu 27/1118:05SOU - SEA
1 stop25h 40mKLM
Thu 4/1215:05SEA - SOU
1 stop17h 55mKLM
Deal found 10/11£545
Wed 3/1212:25SOU - JFK
1 stop12h 00mAer Lingus
Tue 9/1221:10JFK - SOU
1 stop17h 30mAer Lingus
Deal found 11/11£552

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 13 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

Wed 3/12

12:25-15:40

2 stops32h 15m

Newark

Tue 9/12

17:30-15:35

2 stops17h 05m

£426

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Sat 7/3

09:25-23:20

2 stops18h 55m

Miami

Wed 11/3

08:05-08:20

2 stops20h 15m

£460

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 27/3

08:40-19:55

1 stop15h 15m

Boston Logan Intl

Mon 30/3

20:20-08:50

1 stop31h 30m

£462

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 26/3

18:05-00:07

2 stops37h 02m

Los Angeles

Mon 30/3

16:50-08:50

1 stop32h 00m

£466

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 4/12

18:05-14:50

1 stop25h 45m

Miami

Tue 9/12

16:50-17:00

1 stop19h 10m

£489

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 4/12

18:05-14:50

1 stop25h 45m

Miami

Tue 9/12

08:10-08:10

2 stops19h 00m

£489

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Thu 27/11

18:05-18:51

2 stops29h 46m

Miami

Thu 4/12

11:23-08:05

2 stops15h 42m

£493

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 4/3

17:30-11:35

1 stop26h 05m

Seattle/Tacoma Intl

Sun 8/3

23:59-08:10

2 stops25h 11m

£495

SouthamptonSeattle

SOU - SEA

SOUSEA

Southampton Eastleigh

Wed 4/3

17:30-11:35

1 stop26h 05m

Seattle/Tacoma Intl

Sun 8/3

16:00-08:10

1 stop33h 10m

£495

SouthamptonNewark

SOU - EWR

SOUEWR

Southampton Eastleigh

Fri 23/1

09:30-15:40

2 stops35h 10m

Newark

Mon 26/1

17:40-08:50

3 stops34h 10m

£500

Flights are sorted by cheapest return flights first.

Deals found on 12/11

Showing 1-10 of 60 results
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2
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6

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 £92). Flying from Portsmouth to North America in December is currently the most expensive (average of £306). 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 13 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 13 November 2025.

The most flights from P0R to 0NA are scheduled on a Monday (50 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (42 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 13 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
1,410 reviews
Check prices

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

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
1,410 reviews
KLM
7.7
Good
1,410 reviews
Check prices

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

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
673 reviews
KLM
7.7
Good
1,410 reviews
Check prices

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

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
1,370 reviews
KLM
7.7
Good
1,410 reviews
Check prices

Comfort

7.7

Food

7.3

Entertainment

7.1

Overall

7.7

Crew

8.4

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 15h 15m. Virgin Atlantic provides one of the quickest options available for as low as £462. The distance between Portsmouth and North America is about 3228 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 KLM (87%), Air France (83%) or Delta (83%) 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 £2,591 for a flight from Portsmouth to North America. The cheapest flight overall is £351 while the most popular route, (Southampton Eastleigh - New York John F Kennedy Intl) is currently priced at £498.

  • 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 £92). Flying from Portsmouth to North America in December is currently the most expensive (average of £306). 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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Alternative routes for Portsmouth to North America

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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 13 November 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£92Average£608FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapest£243Average£660FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
PLAYCheapest£274Average£393FlexibilityNo cancel feeOn-timeN/A
Search PLAY flights
TAP AIR PORTUGALCheapest£289Average£492FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air CanadaCheapest£291Average£543FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
SWISSCheapest£298Average£463FlexibilityNo cancel feeOn-time79%
Search SWISS flights
AeromexicoCheapest£303Average£678FlexibilityNo cancel feeOn-timeN/A
Search Aeromexico flights
IcelandairCheapest£305Average£521FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£306Average£516FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£310Average£644FlexibilityNo 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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