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$188+ Cheap flights from Pasadena, CA to London (LON)

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 7/20. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LON
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheapflights Tip: The best prices from Pasadena to London are usually found in October or September, booked 55 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

Cheap flight deals from Pasadena to London

Keep the following information in mind while searching for Pasadena to London flight deals. Data was last updated July 1, 2025.

Round-trip from

$563
(Expedia)

One-way from

$188
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$814
From Pasadena to London (LON)
Search Deals
One-way flight from Pasadena to London (LON)
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($76 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Pasadena to London

Cheapest flights from Pasadena to London
Explore the most affordable flight options available from Pasadena to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

This Air Canada deal was found by Cheapflights users on 7/1. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/118:05 amLAX - LHR
1 stop17h 55mAir Canada
Sat 8/309:30 amLHR - LAX
2 stops19h 30mAir Canada
Deal found 7/1$561
This Delta deal was found by Cheapflights users on 7/1. 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.
Sat 7/1911:55 pmLAX - LHR
1 stop22h 30mDelta
Thu 8/149:55 amLHR - LAX
Nonstop11h 20mDelta
Deal found 7/1$563
This Expedia deal was found by Cheapflights users on 7/1. 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 8/64:30 pmLAX - LGW
Nonstop10h 25mNorse Atlantic UK
Mon 8/1810:45 amLGW - LAX
Nonstop11h 15mNorse Atlantic UK
Deal found 7/1$563
This SWISS deal was found by Cheapflights users on 6/30. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/27:35 pmLAX - LHR
1 stop28h 20mSWISS
Thu 8/218:40 amLHR - LAX
2 stops19h 27mSWISS
Deal found 6/30$564
This Kiwi.com deal was found by Cheapflights users on 6/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/137:35 pmLAX - LCY
1 stop13h 40mSWISS
Sun 10/267:20 pmLCY - LAX
1 stop29h 10mSWISS
Deal found 6/30$564
This SmartFares deal was found by Cheapflights users on 6/30. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/177:35 pmLAX - LGW
1 stop14h 20mSWISS
Wed 9/246:35 pmLGW - LAX
1 stop29h 55mSWISS
Deal found 6/30$564
This Austrian Airlines deal was found by Cheapflights users on 6/30. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/123:05 pmLAX - LHR
1 stop15h 15mAustrian Airlines
Thu 9/256:00 amLHR - LAX
1 stop15h 05mAustrian Airlines
Deal found 6/30$565
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/3110:32 amLAX - LGW
1 stop14h 48mAmerican Airlines
Fri 8/83:05 pmLGW - LAX
1 stop16h 14mAmerican Airlines
Deal found 6/30$565
This Norse deal was found by Cheapflights users on 6/30. 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 Norse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/119:25 pmLAX - LTN
1 stop27h 50mMultiple Airlines
Mon 8/256:05 amLTN - LAX
1 stop21h 00mMultiple Airlines
Deal found 6/30$566
This Kiwi.com deal was found by Cheapflights users on 7/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/187:45 pmLAX - LGW
1 stop15h 25mMultiple Airlines
Sat 8/309:25 amLGW - LAX
1 stop19h 00mMultiple Airlines
Deal found 7/1$567
This Delta deal was found by Cheapflights users on 6/30. 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 7/1611:35 amLAX - LGW
1 stop14h 25mDelta
Wed 8/1312:00 pmLGW - LAX
1 stop17h 30mDelta
Deal found 6/30$569
This United Airlines deal was found by Cheapflights users on 7/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/194:40 pmLAX - LHR
Nonstop10h 30mUnited Airlines
Sat 9/279:05 amLHR - LAX
1 stop36h 00mUnited Airlines
Deal found 7/1$570

Cheapflights Fare Finder

Customize your flight search to find flights from Pasadena to London 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 July 1, 2025.
Use the filters below to find and compare flights from Pasadena to London that are best for you.

Fly from

Pasadena

Fly to

London

Route

Depart

Return

Price

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Mon 8/11

8:05 am-10:00 am

1 stop17h 55m

London Heathrow

Sat 8/30

9:30 am-9:00 pm

2 stops19h 30m

$561

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sat 7/19

11:55 pm-6:25 am

1 stop22h 30m

London Heathrow

Thu 8/14

9:55 am-1:15 pm

Nonstop11h 20m

$563

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Wed 8/6

4:30 pm-10:55 am

Nonstop10h 25m

London Gatwick

Mon 8/18

10:45 am-2:00 pm

Nonstop11h 15m

$563

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sat 8/2

7:35 pm-7:55 am

1 stop28h 20m

London Heathrow

Thu 8/21

8:40 am-8:07 pm

2 stops19h 27m

$564

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Wed 9/17

7:35 pm-5:55 pm

1 stop14h 20m

London Gatwick

Wed 9/24

6:35 pm-4:30 pm

1 stop29h 55m

$564

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Fri 9/12

3:05 pm-2:20 pm

1 stop15h 15m

London Heathrow

Thu 9/25

6:00 am-1:05 pm

1 stop15h 05m

$565

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Thu 7/31

10:32 am-9:20 am

1 stop14h 48m

London Gatwick

Fri 8/8

3:05 pm-11:19 pm

1 stop16h 14m

$565

Los AngelesLondon

LAX - LTN

LAXLTN

Los Angeles

Mon 8/11

9:25 pm-9:15 am

1 stop27h 50m

London Luton

Mon 8/25

6:05 am-7:05 pm

1 stop21h 00m

$566

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

Mon 8/18

7:45 pm-7:10 pm

1 stop15h 25m

London Gatwick

Sat 8/30

9:25 am-8:25 pm

1 stop19h 00m

$567

Los AngelesLondon

LAX - LCY

LAXLCY

Los Angeles

Mon 8/11

7:35 pm-12:30 pm

1 stop32h 55m

London City

Sat 8/30

9:20 am-4:30 pm

1 stop15h 10m

$567

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 40 results
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Best time to book a flight from Pasadena to London

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

How far ahead should I book a flight from Pasadena to London?

Use this chart to determine the optimal time to book a round-trip flight from Pasadena to London. Price data was last updated on June 27, 2025.

Booking 55 days in advance of your planned departure date is, on average, the best time to get cheap flights from Pasadena to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, November is the cheapest month in which you can book a flight from Pasadena to London (average of $661). Flying from Pasadena to London in June is currently the most expensive (average of $1,098). 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 LON?

Find hourly flight availability from Pasadena to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 1, 2025.

When flying from Pasadena to London, 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 Pasadena to London?

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

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

Weekly flight availability from Pasadena to London

Explore weekly flight availability from Pasadena to London. 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 July 1, 2025.

The most flights from P4S to LON are scheduled on a Monday (59 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 on average).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated July 1, 2025.
Read reviews from past customers who have flown Delta, KLM, and Austrian Airlines from Pasadena to London. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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
1,366 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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.
Austrian Airlines
7.6
Good
807 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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.
SWISS
7.5
Good
1,654 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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.
United Airlines
7.4
Good
8,858 reviews
Delta
8.0
Very good
7,973 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Boarding

8.2

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 London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines to fly from Pasadena to London one-way?

    For one-way options, check prices for Norse Atlantic UK. According to our data, you can fly for as low as $188. Users have also found prices from $205 and $375 on TAP AIR PORTUGAL and SWISS, respectively.

  • What are the most popular routes from Pasadena to London?

    When deciding which route to take from Pasadena to London consider Los Angeles - London Heathrow, Los Angeles - London City or Los Angeles - London Gatwick as they are the most popular.

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

    Consider Air Canada (85%), Austrian Airlines (85%) or United Airlines (85%) when booking your flight. These represent the most reliable airlines when flying from Pasadena to London.

  • What are the cheapest flights from Pasadena to London?

    Looking for the cheapest flight from Pasadena to London? While on average our users pay $3,404, our data indicates the cheapest price to be $397. The most popular route (Los Angeles - London Heathrow), is priced around $371.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Pasadena to London (average of $661). Flying from Pasadena to London in June is currently the most expensive (average of $1,098). 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

Traveling to a place near Pasadena?

Book flights to Pasadena if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Aylesbury
Chelmsford
Brentwood
Chichester
Arundel
Milton Keynes
Bishop's Stortford
Dartford

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Top 10 airlines flying from Pasadena to London

Discover the top 10 airlines that operate flights from Pasadena to London. 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 July 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$272Average$933FlexibilityNo cancel feeOn-time60%
SWISSCheapest$336Average$915FlexibilityNo cancel feeOn-time79%
Norse Atlantic UKCheapest$391Average$680FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$419Average$592FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$441Average$724FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$509Average$671FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$553Average$861FlexibilityNo cancel feeOn-time75%
FinnairCheapest$555Average$732FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$556Average$733FlexibilityNo cancel feeOn-timeN/A
IberiaCheapest$574Average$750FlexibilityNo cancel feeOn-time77%

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