HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Portsmouth

$488+ Cheap flights from Pasadena, CA 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 7/26. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
feb. 28 — mar. 71
sáb. 2/28
sáb. 3/7
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pasadena 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 Pasadena to Portsmouth

Cheapest flights from Pasadena to Portsmouth
Explore the most affordable flight options available from Pasadena to Portsmouth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on enero 29, 2026.

This KLM deal was found by Cheapflights users on 1/26. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 4/54:45 pm
LAX
-
SOU
1 stop16h 05m
KLM
mié. 4/299:05 am
SOU
-
LAX
1 stop34h 45m
KLM
Deal found 1/26$767
This Delta deal was found by Cheapflights users on 1/27. 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.
dom. 4/261:50 pm
LAX
-
SOU
1 stop34h 45m
Delta
mié. 5/209:05 am
SOU
-
LAX
1 stop13h 40m
Delta
Deal found 1/27$770
This Delta deal was found by Cheapflights users on 1/26. 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.
dom. 4/59:45 am
LAX
-
SOU
2 stops23h 05m
Delta
mié. 4/299:05 am
SOU
-
LAX
1 stop13h 40m
Delta
Deal found 1/26$772
This Delta deal was found by Cheapflights users on 1/27. 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.
lun. 4/279:45 am
LAX
-
SOU
2 stops23h 05m
Delta
vie. 5/159:05 am
SOU
-
LAX
1 stop13h 40m
Delta
Deal found 1/27$775
This Delta deal was found by Cheapflights users on 1/27. 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.
lun. 4/611:59 pm
LAX
-
SOU
2 stops32h 51m
Delta
lun. 4/275:20 pm
SOU
-
LAX
1 stop26h 30m
Delta
Deal found 1/27$787
This Delta deal was found by Cheapflights users on 1/27. 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.
lun. 8/174:45 pm
LAX
-
SOU
1 stop32h 00m
Delta
lun. 9/79:05 am
SOU
-
LAX
1 stop34h 45m
Delta
Deal found 1/27$819
This Delta deal was found by Cheapflights users on 1/27. 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.
jue. 4/301:50 pm
LAX
-
SOU
1 stop19h 00m
Delta
jue. 5/149:05 am
SOU
-
LAX
1 stop13h 40m
Delta
Deal found 1/27$820
This Delta deal was found by Cheapflights users on 1/27. 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.
dom. 8/167:45 am
LAX
-
SOU
2 stops17h 00m
Delta
mar. 9/19:05 am
SOU
-
LAX
1 stop13h 40m
Delta
Deal found 1/27$824
This Delta deal was found by Cheapflights users on 1/27. 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.
dom. 4/57:35 am
LAX
-
SOU
2 stops25h 15m
Delta
dom. 4/265:20 pm
SOU
-
LAX
1 stop26h 30m
Delta
Deal found 1/27$825
This KLM deal was found by Cheapflights users on 1/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/101:50 pm
LAX
-
SOU
1 stop34h 55m
KLM
mié. 8/269:15 am
SOU
-
LAX
2 stops19h 48m
KLM
Deal found 1/27$829

Find flight deals from Pasadena to Portsmouth

Keep the following information in mind while searching for Pasadena to Portsmouth flight deals. Data was last updated enero 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$767
(KLM)

One-way from

$488
(Delta)

Popular in

July

Cheapest in

April

Average price

$738
Provider with most accurate pricing for Los Angeles-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-London (LON) flights.
Search Deals
From Pasadena to Portsmouth
Search Deals
One-way flight from Pasadena to Portsmouth
Search Deals
Highest demand for flights based on searches. 17% potential increase in price ($232 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($43 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pasadena 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 enero 29, 2026.
Use the filters below to find and compare flights from Pasadena to Portsmouth that are best for you.

Fly from

Pasadena

Fly to

Portsmouth

Route

Depart

Return

Price

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

dom. 4/5

4:45 pm-4:50 pm

1 stop16h 05m

Southampton Eastleigh

mié. 4/29

9:05 am-11:50 am

1 stop34h 45m

$767

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

lun. 4/27

4:45 pm-4:50 pm

1 stop16h 05m

Southampton Eastleigh

mié. 5/20

9:05 am-2:45 pm

1 stop13h 40m

$770

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

lun. 4/27

4:45 pm-4:50 pm

1 stop16h 05m

Southampton Eastleigh

vie. 5/15

9:05 am-2:45 pm

1 stop13h 40m

$770

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

mar. 4/28

4:45 pm-4:50 pm

1 stop16h 05m

Southampton Eastleigh

mié. 5/20

9:05 am-2:45 pm

1 stop13h 40m

$770

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

dom. 4/26

1:50 pm-8:35 am

1 stop34h 45m

Southampton Eastleigh

mar. 5/19

9:05 am-11:50 am

1 stop34h 45m

$770

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

mié. 4/29

1:50 pm-8:35 am

1 stop34h 45m

Southampton Eastleigh

mar. 5/19

5:20 pm-11:50 am

1 stop26h 30m

$770

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

mar. 4/28

4:45 pm-4:50 pm

1 stop16h 05m

Southampton Eastleigh

vie. 5/15

9:05 am-2:45 pm

1 stop13h 40m

$770

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

mar. 3/31

4:45 pm-4:50 pm

1 stop16h 05m

Southampton Eastleigh

lun. 4/27

5:20 pm-2:45 pm

1 stop29h 25m

$770

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

dom. 4/26

11:59 pm-8:35 am

2 stops24h 36m

Southampton Eastleigh

jue. 5/14

5:20 pm-2:45 pm

1 stop29h 25m

$775

Los AngelesSouthampton

LAX - SOU

LAXSOU

Los Angeles

lun. 4/27

10:55 pm-8:35 am

2 stops25h 40m

Southampton Eastleigh

mar. 5/19

5:20 pm-11:50 am

1 stop26h 30m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 20 results
1
2

Best time to book a flight from Pasadena to Portsmouth

Have a flexible travel schedule? Discover the best time to fly to Portsmouth from Pasadena 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 Pasadena to Portsmouth

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

Currently, October is the cheapest month in which you can book a flight from Pasadena to Portsmouth (average of $222). Flying from Pasadena to Portsmouth in June is currently the most expensive (average of $569). 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 P4S to P0R?

Find hourly flight availability from Pasadena 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 enero 29, 2026.

It’s optimal to fly from Pasadena to Portsmouth in the afternoon. By choosing this option you can save up to 33% on the cost of your flight, compared to a flight in the morning.

What is the cheapest day to fly from Pasadena to Portsmouth?

Use this chart to determine the cheapest time to fly round-trip from Pasadena to Portsmouth. Price data was last updated on January 24, 2026.

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

Weekly flight availability from Pasadena to Portsmouth

Explore weekly flight availability from Pasadena 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 enero 29, 2026.

The most flights from P4S to P0R are scheduled on a Thursday (51 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (27 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 enero 29, 2026.
See what other customers who have flown with Delta, KLM, and Aer Lingus from Pasadena 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
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Food

7.2

Entertainment

7.8

Overall

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
7.9
Good
8,127 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Food

7.2

Entertainment

7.8

Overall

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
7.7
Good
1,443 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Food

7.2

Entertainment

7.8

Overall

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
1,443 reviews
Delta
7.9
Good
8,127 reviews

Comfort

7.9

Crew

8.5

Boarding

8.1

Food

7.2

Entertainment

7.8

Overall

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 Pasadena to Portsmouth. 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 Pasadena to Portsmouth?

    KLM and Delta can get you from Pasadena to Portsmouth in just under 16h 05m. Your travel time can differ by up to . There are 5434 mi between Pasadena and Portsmouth.

  • What are the most reliable airlines from Pasadena to Portsmouth?

    Consider Air Canada (93%), Austrian Airlines (93%) or United Airlines (93%) when booking your flight. These represent the most reliable airlines when flying from Pasadena to Portsmouth.

  • What are the cheapest flights from Pasadena to Portsmouth?

    Looking at all options, your cheapest flight can be booked for $254. While the most popular route (Los Angeles - Southampton Eastleigh) can be booked for $767 on average, our data indicates $3,136 when flying from Pasadena to Portsmouth.

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

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

  • How can I find direct flights from Pasadena to Portsmouth?

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

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

    Yes. Cheapflights offers flight deals from Pasadena 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 Pasadena to Portsmouth?

    Currently, October is the cheapest month in which you can book a flight from Pasadena to Portsmouth (average of $222). Flying from Pasadena to Portsmouth in June is currently the most expensive (average of $569). 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 Pasadena 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 Gatwick flights
San Francisco to Gatwick flights
Los Angeles to Stansted flights
Los Angeles to London City flights
San Francisco to London City flights
San Francisco to Stansted flights
San Diego to Heathrow flights
Ontario to Heathrow flights
Las Vegas to Heathrow flights
Los Angeles to Luton flights
San Francisco to Luton flights
Santa Ana to Heathrow flights
Los Angeles to Edinburgh flights
San Diego to Gatwick flights
San Jose to Heathrow flights
San Francisco to Edinburgh flights
San Diego to London City flights
Sacramento to Heathrow flights
Las Vegas to Gatwick flights
Los Angeles to Manchester flights
Las Vegas to London City flights
Oakland to Heathrow flights
San Diego to Stansted flights
San Jose to Gatwick flights
Las Vegas to Stansted flights
Sacramento to Gatwick flights
Ontario to Edinburgh flights
Oakland to Gatwick flights
Santa Ana to Edinburgh flights
Sacramento to Edinburgh flights
Sacramento to London City flights
San Francisco to Manchester flights
Reno to Heathrow flights
San Diego to Edinburgh flights
San Jose to Edinburgh flights
Santa Ana to Manchester flights
Burbank to Manchester flights
San Francisco to Southampton flights
Burbank to Heathrow flights
Ontario to Gatwick flights
Palm Springs to Heathrow flights
Reno to Gatwick flights
Burbank to Gatwick flights
Los Angeles to Southampton flights
Reno to London City flights
Santa Rosa to Heathrow flights
Ontario to Manchester flights
San Jose to Manchester flights

Top 10 airlines flying from Pasadena to Portsmouth

Discover the top 10 airlines that operate flights from Pasadena 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 enero 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$273Average$806FlexibilityNo cancel feeOn-time62%
SWISSCheapest$336Average$900FlexibilityNo cancel feeOn-time79%
Norse Atlantic UKCheapest$352Average$680FlexibilityNo cancel feeOn-timeN/A
TAP AIR PORTUGALCheapest$375Average$571FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$468Average$621FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$476Average$880FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$485Average$690FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$498Average$753FlexibilityNo cancel feeOn-time70%
DeltaCheapest$540Average$783FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$549Average$874FlexibilityNo cancel feeOn-time75%

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.