HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$401+ Cheap flights from Los Angeles (LAX) to Portsmouth, England

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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Los Angeles to Portsmouth with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Los Angeles to Portsmouth

Keep the following information in mind while searching for Los Angeles to Portsmouth flight deals. Data was last updated September 16, 2025.

Round-trip from

$736
(Delta)

One-way from

$401
(Kiwi.com)

Popular in

January

Cheapest in

April

Average price

$955
From Los Angeles to Portsmouth
Search Deals
One-way flight from Los Angeles to Portsmouth
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($318 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 9% potential price decrease ($104 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Los Angeles to Portsmouth

Cheapest flights from Los Angeles to Portsmouth
Explore the most affordable flight options available from Los Angeles to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/51:45 pmLAX - SOU
1 stop19h 40mDelta
Tue 11/115:30 pmSOU - LAX
1 stop26h 15mDelta
Deal found 9/14$736
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/59:59 amLAX - SOU
2 stops23h 26mDelta
Thu 11/136:05 pmSOU - LAX
1 stop25h 40mDelta
Deal found 9/14$740
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/111:45 pmLAX - SOU
1 stop19h 15mDelta
Thu 11/206:05 pmSOU - LAX
2 stops30h 49mDelta
Deal found 9/14$746
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/29:00 amLAX - SOU
2 stops24h 25mDelta
Thu 11/136:05 pmSOU - LAX
2 stops29h 04mDelta
Deal found 9/14$750
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/266:00 amLAX - SOU
2 stops18h 45mDelta
Wed 10/159:20 amSOU - LAX
2 stops19h 16mDelta
Deal found 9/15$800
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/41:45 pmLAX - SOU
1 stop19h 15mDelta
Thu 11/136:05 pmSOU - LAX
1 stop25h 40mDelta
Deal found 9/14$824
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/61:45 pmLAX - SOU
1 stop19h 15mDelta
Thu 11/136:05 pmSOU - LAX
1 stop25h 40mDelta
Deal found 9/14$826
This Delta deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/138:30 amLAX - SOU
2 stops15h 35mDelta
Tue 11/185:30 pmSOU - LAX
1 stop26h 15mDelta
Deal found 9/14$830
This Expedia deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/158:15 pmLAX - SOU
1 stop15h 15mAer Lingus
Fri 10/319:30 amSOU - LAX
1 stop17h 00mAer Lingus
Deal found 9/13$831
This Delta deal was found by Cheapflights users on 9/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/144:50 pmLAX - SOU
1 stop16h 10mDelta
Fri 10/318:40 amSOU - LAX
2 stops20h 09mDelta
Deal found 9/13$834
This Delta deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2611:43 amLAX - SOU
2 stops22h 42mDelta
Fri 11/78:40 amSOU - LAX
2 stops20h 10mDelta
Deal found 9/15$838
This Delta deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/276:15 amLAX - SOU
2 stops18h 55mDelta
Fri 11/78:40 amSOU - LAX
2 stops21h 09mDelta
Deal found 9/16$839

Cheapflights Fare Finder

 
Customize your flight search to find flights from Los Angeles to Portsmouth 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 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Los Angeles to Portsmouth that are best for you.

Fly from

Los Angeles

Fly to

Portsmouth

Route

Depart

Return

Price

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sun 11/16

1:45 pm-8:10 am

1 stop34h 25m

Southampton Eastleigh

Mon 11/24

6:05 pm-11:45 am

1 stop25h 40m

$736

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 11/5

1:45 pm-5:25 pm

1 stop19h 40m

Southampton Eastleigh

Tue 11/11

5:30 pm-11:45 am

1 stop26h 15m

$736

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sun 11/2

7:00 am-5:25 pm

2 stops26h 25m

Southampton Eastleigh

Tue 11/11

8:40 am-11:45 am

1 stop35h 05m

$740

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sun 11/16

11:55 pm-8:10 am

2 stops24h 15m

Southampton Eastleigh

Tue 11/25

8:40 am-11:45 am

1 stop35h 05m

$740

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Mon 11/3

7:00 am-5:00 pm

2 stops26h 00m

Southampton Eastleigh

Mon 11/10

8:40 am-11:45 am

1 stop35h 05m

$740

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sun 11/9

9:45 pm-8:10 am

2 stops26h 25m

Southampton Eastleigh

Wed 11/19

5:30 pm-11:45 am

1 stop26h 15m

$740

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 11/12

2:17 pm-8:05 am

2 stops33h 48m

Southampton Eastleigh

Tue 11/25

5:30 pm-11:45 am

1 stop26h 15m

$740

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Sun 11/9

9:45 pm-8:10 am

2 stops26h 25m

Southampton Eastleigh

Tue 11/18

5:30 pm-11:45 am

1 stop26h 15m

$740

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Mon 11/17

9:55 pm-8:10 am

2 stops26h 15m

Southampton Eastleigh

Mon 11/24

8:40 am-11:45 am

1 stop35h 05m

$740

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

Wed 11/5

11:19 am-5:25 pm

2 stops22h 06m

Southampton Eastleigh

Mon 11/17

6:05 pm-11:45 am

1 stop25h 40m

$740

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 18 results
1
2

Best time to book a flight from Los Angeles to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Los Angeles with our price prediction graph.
Estimated round-trip 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 Los Angeles to Portsmouth

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

Currently, November is the cheapest month in which you can book a flight from Los Angeles to Portsmouth (average of $661). Flying from Los Angeles to Portsmouth in June is currently the most expensive (average of $1,097). 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 LAX to P0R?

Find hourly flight availability from Los Angeles to Portsmouth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Los Angeles to Portsmouth, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Los Angeles to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from Los Angeles to Portsmouth. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Los Angeles to Portsmouth flight should consider departing on Tuesday evenings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Los Angeles to Portsmouth

Explore weekly flight availability from Los Angeles to Portsmouth. 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 September 16, 2025.

The most flights from LAX to P0R are scheduled on a Monday (56 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (52 on average).

Reviews of airlines servicing Portsmouth

Get insights into the airlines that provide service to Portsmouth. 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 Portsmouth. Reviews last updated September 16, 2025.
See what other customers who have flown with Delta, KLM, and Virgin Atlantic from Los Angeles to Portsmouth have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,386 reviews
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.4
Good
664 reviews
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Aer Lingus
7.2
Good
1,274 reviews
Delta
8.0
Very good
7,957 reviews

Boarding

8.2

Food

7.3

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

  • What airport do you fly from for flights from Los Angeles to Portsmouth?

    If you book a flight to Portsmouth from Los Angeles, you will be flying from Los Angeles, which is the city’s only airport. Los Angeles (LAX) is located 9.4 mi from the center of Los Angeles. There are 0 flights from Los Angeles to Portsmouth per day from 19 different airlines.

  • How long is the flight from Los Angeles to Portsmouth?

    For as low as $736, Delta can have you in Portsmouth from Los Angeles in 34h 25m. The distance from Los Angeles to Portsmouth is about 5434 mi.

  • What are the most reliable airlines from Los Angeles to Portsmouth?

    Before booking your flight to Portsmouth from Los Angeles, check out the most reliable airlines to get you to your destination on time: KLM (94%), Air France (94%), Delta( 94%).

  • What are the cheapest flights from Los Angeles to Portsmouth?

    On average you can expect to pay $3,098 for a flight from Los Angeles to Portsmouth. The cheapest flight overall is $347 while the most popular route, (Los Angeles - Southampton Eastleigh) is currently priced at $736.

  • Can I find deals for flights from Los Angeles to Portsmouth that include hotel bookings?

    Yes. In addition to deals on Los Angeles to Portsmouth flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Los Angeles to Portsmouth?

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

  • Can I find deals for business class flights from Los Angeles to Portsmouth?

    Yes. Cheapflights offers flight deals from Los Angeles to Portsmouth 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 Los Angeles to Portsmouth?

    Currently, November is the cheapest month in which you can book a flight from Los Angeles to Portsmouth (average of $661). Flying from Los Angeles to Portsmouth in June is currently the most expensive (average of $1,097). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Los Angeles to Portsmouth

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Heathrow flights
San Francisco to Heathrow flights
Los Angeles to London City flights
Los Angeles to Gatwick flights
San Francisco to Gatwick flights
San Diego to Heathrow flights
San Francisco to London City flights
Los Angeles to Stansted flights
Ontario to Heathrow flights
Los Angeles to Luton flights
Santa Ana to Heathrow flights
San Francisco to Stansted flights
Las Vegas to Heathrow flights
San Francisco to Luton flights
San Diego to Gatwick flights
San Jose to Heathrow flights
Los Angeles to Edinburgh flights
San Diego to London City flights
Sacramento to Heathrow flights
San Francisco to Edinburgh flights
Las Vegas to Edinburgh flights
Los Angeles to Bristol flights
Los Angeles to Manchester flights
Las Vegas to Gatwick flights
San Francisco to Bristol flights
Las Vegas to London City flights
Oakland to Heathrow flights
Burbank to Heathrow flights
Sacramento to Gatwick flights
Palm Springs to Heathrow flights
San Francisco to Manchester flights
San Jose to Gatwick flights
Ontario to Manchester flights
Santa Ana to Manchester flights
Los Angeles to Birmingham flights
Long Beach to Heathrow flights
Burbank to Manchester flights
Oakland to Gatwick flights
San Diego to Edinburgh flights
Los Angeles to Southampton flights
Los Angeles to Leeds flights
Reno to Heathrow flights
San Diego to Stansted flights
Ontario to Gatwick flights
Ontario to Edinburgh flights
San Francisco to Southampton flights
Sacramento to London City flights
Santa Rosa to Heathrow flights
San Francisco to Birmingham flights
Santa Ana to Gatwick flights

Top 10 airlines flying from Los Angeles to Portsmouth

Discover the top 10 airlines that operate flights from Los Angeles to Portsmouth. 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 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$272Average$1,046FlexibilityNo cancel feeOn-time60%
JetBlueCheapest$273Average$794FlexibilityNo cancel feeOn-time62%
SWISSCheapest$336Average$912FlexibilityNo cancel feeOn-time79%
Norse Atlantic UKCheapest$360Average$681FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$363Average$782FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$375Average$651FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$419Average$593FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$475Average$898FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$490Average$704FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$507Average$789FlexibilityNo cancel feeOn-time70%

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.