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Cheap flights from Portsmouth to North America from £242

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 21/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — LAX
25 Aug — 1 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap 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 26 July 2026.

Thu 10/909:20
SOU
-
EWR
2 stops32h 55m
Multiple Airlines
Sun 13/917:45
EWR
-
SOU
2 stops20h 45m
Multiple Airlines
Deal found 23/7£451
Thu 3/909:20
SOU
-
EWR
2 stops32h 55m
Multiple Airlines
Thu 10/917:15
EWR
-
SOU
2 stops21h 15m
Multiple Airlines
Deal found 21/7£487
Thu 3/909:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Thu 10/923:55
JFK
-
SOU
1 stop14h 35m
Aer Lingus
Deal found 21/7£488
Fri 11/909:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Sat 26/921:05
JFK
-
SOU
1 stop17h 25m
Aer Lingus
Deal found 24/7£488
Fri 4/909:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Sat 19/921:05
JFK
-
SOU
1 stop14h 45m
Aer Lingus
Deal found 25/7£503
Mon 7/909:20
SOU
-
LAX
1 stop17h 05m
Aer Lingus
Mon 14/920:10
LAX
-
SOU
1 stop15h 20m
Aer Lingus
Deal found 25/7£504
Mon 7/920:00
SOU
-
MIA
2 stops24h 05m
Aer Lingus
Mon 14/916:55
MIA
-
SOU
2 stops18h 55m
Aer Lingus
Deal found 25/7£515
Wed 23/908:55
SOU
-
JFK
1 stop18h 30m
Aer Lingus
Fri 25/923:55
JFK
-
SOU
1 stop11h 55m
Aer Lingus
Deal found 23/7£519
Thu 10/909:20
SOU
-
JFK
1 stop18h 05m
Aer Lingus
Sun 13/921:05
JFK
-
SOU
1 stop14h 45m
Aer Lingus
Deal found 22/7£520
Fri 4/917:20
SOU
-
MIA
2 stops26h 45m
Aer Lingus
Fri 11/922:00
MIA
-
SOU
2 stops40h 30m
Aer Lingus
Deal found 21/7£527
Fri 4/909:20
SOU
-
EWR
2 stops32h 55m
Multiple Airlines
Sat 19/917:15
EWR
-
SOU
2 stops18h 35m
Multiple Airlines
Deal found 25/7£528
Sat 5/909:20
SOU
-
JFK
1 stop15h 00m
Aer Lingus
Sat 12/921:05
JFK
-
SOU
1 stop17h 25m
Aer Lingus
Deal found 22/7£529

Find 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 26 July 2026.

Round-trip from

£451

One-way from

£242

Popular in

June

Cheapest in

September

Average price

£568
10/9-13/9
  • 10/9-13/9
  • 4 total stops
  • 53h 40m total
  • Portsmouth to North America
Search Deals
21/8
  • 21/8
  • 2 total stops
  • 43h 00m total
  • Portsmouth to North America
Search Deals
Highest demand for flights based on searches. 16% potential increase in price (£68 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 July 2026
Search Deals

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 26 July 2026.
Use the filters below to find and compare flights from Portsmouth to North America that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SouthamptonMiami

SOU - MIA

SOUMIA

Southampton Eastleigh

Mon 7/9

20:00-15:05

2 stops24h 05m

Miami

Mon 14/9

16:55-16:50

2 stops18h 55m

£515

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Fri 4/9

20:00-15:30

2 stops24h 30m

Washington, D.C. Dulles Intl

Fri 11/9

17:00-16:50

2 stops18h 50m

£535

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Mon 7/9

20:00-16:10

2 stops25h 10m

Boston Logan Intl

Mon 14/9

17:40-16:50

2 stops18h 10m

£548

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

17:50-19:30

2 stops20h 40m

£556

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 4/9

20:00-16:10

2 stops25h 10m

Boston Logan Intl

Fri 11/9

17:25-08:40

1 stop10h 15m

£596

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Fri 4/9

09:05-22:43

2 stops18h 38m

Boston Logan Intl

Fri 11/9

12:15-08:45

2 stops15h 30m

£608

SouthamptonWashington, D.C.

SOU - IAD

SOUIAD

Southampton Eastleigh

Thu 29/10

09:20-17:20

2 stops36h 00m

Washington, D.C. Dulles Intl

Thu 5/11

21:00-17:40

2 stops15h 40m

£620

SouthamptonLos Angeles

SOU - LAX

SOULAX

Southampton Eastleigh

Thu 10/9

09:05-22:10

2 stops21h 05m

Los Angeles

Wed 16/9

06:10-08:35

2 stops18h 25m

£621

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Tue 6/10

09:05-16:36

1 stop12h 31m

Boston Logan Intl

Thu 22/10

16:45-08:35

1 stop10h 50m

£628

SouthamptonBoston

SOU - BOS

SOUBOS

Southampton Eastleigh

Mon 5/10

17:20-13:15

1 stop24h 55m

Boston Logan Intl

Tue 20/10

16:45-08:45

1 stop11h 00m

£628

Flights are sorted by cheapest return flights first.

Deals found on 24/7

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
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 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 26 July 2026.

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 evening tend to be the most expensive. A flight in the morning could potentially save you up to 12% on airfare.

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 26 July 2026.

The most flights from P0R to 0NA are scheduled on a Saturday (52 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (51 on average).

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 18 July 2026.

Travellers seeking maximum savings on their Portsmouth to North America 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 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 26 July 2026.
Get a feel of what it's like to fly with KLM and Aer 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
7.8
Good
1,546 reviews
Check prices

Comfort

7.7

Food

7.3

Entertainment

7.2

Boarding

7.8

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent
KLM
7.8
Good
1,546 reviews
KLM
7.8
Good
1,546 reviews
Check prices

Comfort

7.7

Food

7.3

Entertainment

7.2

Boarding

7.8

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent
Aer Lingus
7.3
Good
1,679 reviews
KLM
7.8
Good
1,546 reviews
Check prices

Comfort

7.7

Food

7.3

Entertainment

7.2

Boarding

7.8

Crew

8.4

Overall

7.8

Reviews

1 / 20
10.0
Excellent

Bobby,Sept 2025

EDI - ATL

Food was above average but could be better, The flight was operated by Delta and was excellent

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 18h 38m. Aer Lingus provides one of the quickest options available for as low as £608. 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 - Newark. You may also consider Southampton Eastleigh - New York John F Kennedy Intl or Southampton Eastleigh - Mexico City Benito Juarez.

  • 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 SAUDIA (100%), Royal Jordanian (94%) or Air Canada (92%) 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 £3,044 for a flight from Portsmouth to North America. The cheapest flight overall is £312 while the most popular route, (Southampton Eastleigh - Newark) is currently priced at £532.

  • 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.

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 26 July 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest£91Average£578FlexibilityNo cancel feeOn-time62%
Search JetBlue flights
DeltaCheapest£148Average£622FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
IberiaCheapest£164Average£614FlexibilityNo cancel feeOn-time77%
Search Iberia flights
TAP AIR PORTUGALCheapest£227Average£498FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
SWISSCheapest£267Average£439FlexibilityNo cancel feeOn-time79%
Search SWISS flights
Norse Atlantic UKCheapest£269Average£481FlexibilityNo cancel feeOn-timeN/A
Search Norse Atlantic UK flights
IcelandairCheapest£274Average£438FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Scandinavian AirlinesCheapest£313Average£506FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
Aer LingusCheapest£315Average£673FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
Hahn AirCheapest£320Average£528FlexibilityNo cancel feeOn-timeN/A
Search Hahn Air flights

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 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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