London

$216+ 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LON
jun. 17 — jun. 241
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pasadena to London 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.

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 junio 12, 2025.

Round-trip from

$594
(United Airlines)

One-way from

$216
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$836
From Pasadena to London (LON)
One-way flight from Pasadena to London (LON)
Highest demand for flights based on searches. 9% potential increase in price ($75 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Average for round-trip flights in June 2025

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 junio 12, 2025.

This Air Canada deal was found by Cheapflights users on 6/12. 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.
dom. 8/315:10 amLAX - LHR
2 stops22h 40mAir Canada
dom. 9/75:40 pmLHR - LAX
2 stops31h 28mAir Canada
Deal found 6/12$594
This CheapOair deal was found by Cheapflights users on 6/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 9/87:45 pmLAX - LGW
1 stop15h 25mMultiple Airlines
vie. 9/1910:55 amLGW - LAX
Nonstop11h 15mMultiple Airlines
Deal found 6/11$594
This United Airlines deal was found by Cheapflights users on 6/11. 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.
mié. 7/168:05 amLAX - LHR
1 stop14h 25mUnited Airlines
mar. 8/121:05 pmLHR - LAX
Nonstop11h 05mUnited Airlines
Deal found 6/11$595
This Connections by easyJet deal was found by Cheapflights users on 6/12. 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 Connections by easyJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/59:25 pmLAX - LTN
1 stop27h 50mMultiple Airlines
jue. 10/97:30 pmLTN - LAX
1 stop31h 35mMultiple Airlines
Deal found 6/12$595
This Gotogate deal was found by Cheapflights users on 6/12. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/47:35 pmLAX - LCY
1 stop32h 55mSWISS
mié. 8/209:25 amLCY - LAX
1 stop15h 05mSWISS
Deal found 6/12$596
This Gotogate deal was found by Cheapflights users on 6/10. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 8/24:30 pmLAX - LGW
Nonstop10h 25mNorse Atlantic UK
dom. 8/1710:55 amLGW - LAX
Nonstop11h 15mNorse Atlantic UK
Deal found 6/10$597
This CheapOair deal was found by Cheapflights users on 6/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/47:35 pmLAX - LGW
1 stop14h 15mSWISS
sáb. 9/136:40 pmLGW - LAX
1 stop29h 50mSWISS
Deal found 6/11$599
This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 10/268:20 pmLAX - LHR
Nonstop10h 40mBritish Airways
vie. 11/73:05 pmLHR - LAX
Nonstop11h 20mBritish Airways
Deal found 6/12$602
This Travelocity deal was found by Cheapflights users on 6/10. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 7/155:50 pmLAX - LGW
2 stops20h 45mBritish Airways
jue. 7/243:05 pmLGW - LAX
1 stop25h 54mBritish Airways
Deal found 6/10$606
This Mytrip deal was found by Cheapflights users on 6/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/68:05 amLAX - STN
2 stops30h 25mMultiple Airlines
mié. 8/136:35 pmSTN - LAX
2 stops33h 05mMultiple Airlines
Deal found 6/11$606
This KLM deal was found by Cheapflights users on 6/11. 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.
sáb. 8/24:50 pmLAX - LHR
1 stop13h 00mKLM
lun. 9/86:30 amLHR - LAX
1 stop13h 20mKLM
Deal found 6/11$607
This Delta deal was found by Cheapflights users on 6/12. 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.
mar. 7/810:10 amLAX - LHR
1 stop16h 50mDelta
mar. 7/2912:25 pmLHR - LAX
1 stop15h 58mDelta
Deal found 6/12$609

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 junio 12, 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

dom. 8/31

5:10 am-11:50 am

2 stops22h 40m

London Heathrow

mar. 9/9

5:40 pm-12:58 pm

2 stops27h 18m

$594

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

lun. 9/8

7:45 pm-7:10 pm

1 stop15h 25m

London Gatwick

vie. 9/19

10:55 am-2:10 pm

Nonstop11h 15m

$594

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

mié. 7/16

8:05 am-6:30 am

1 stop14h 25m

London Heathrow

mar. 8/12

1:05 pm-4:10 pm

Nonstop11h 05m

$595

Los AngelesLondon

LAX - LCY

LAXLCY

Los Angeles

lun. 8/4

7:35 pm-12:30 pm

1 stop32h 55m

London City

mié. 8/20

9:25 am-4:30 pm

1 stop15h 05m

$596

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

sáb. 8/2

4:30 pm-10:55 am

Nonstop10h 25m

London Gatwick

dom. 8/17

10:55 am-2:10 pm

Nonstop11h 15m

$597

Los AngelesLondon

LAX - LTN

LAXLTN

Los Angeles

mié. 8/13

8:05 am-3:25 pm

2 stops23h 20m

London Luton

lun. 8/18

12:50 pm-4:30 pm

2 stops35h 40m

$598

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

jue. 9/4

7:35 pm-5:50 pm

1 stop14h 15m

London Gatwick

dom. 9/14

6:40 pm-4:30 pm

1 stop29h 50m

$598

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

dom. 7/20

3:30 pm-10:00 am

Nonstop10h 30m

London Heathrow

jue. 7/31

10:55 am-11:51 pm

1 stop20h 56m

$600

Los AngelesLondon

LAX - LGW

LAXLGW

Los Angeles

mar. 7/15

5:50 pm-10:35 pm

2 stops20h 45m

London Gatwick

jue. 7/24

3:05 pm-8:59 am

1 stop25h 54m

$606

Los AngelesLondon

LAX - STN

LAXSTN

Los Angeles

mié. 8/6

8:05 am-10:30 pm

2 stops30h 25m

London Stansted

mié. 8/13

6:35 pm-7:40 pm

2 stops33h 05m

$606

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 58 results
1
2
3
...
6

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 9, 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 $1,108). 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 junio 12, 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 junio 12, 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 (44 on average).

Rainfall in London by month

Plan your trip to London by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London when rainfall is around 1.6 in.

Temperature in London by month

Plan your trip to London by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 junio 12, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from Pasadena to London to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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.
8.0
Very good
8.0
Very good

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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.
8.0
Very good

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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.
8.0
Very good

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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.
8.0
Very good

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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.
8.0
Very good

Food

7.3

Boarding

8.2

Entertainment

7.9

Overall

8.0

Comfort

7.9

Crew

8.5

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 $221. Users have also found prices from $233 and $296 on TAP AIR PORTUGAL and A.P.G., respectively.

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

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

    Consider Air Canada (83%), Austrian Airlines (83%) or United Airlines (83%) 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 $3,330, our data indicates the cheapest price to be $391. The most popular route (Los Angeles - London Heathrow), is priced around $433.

  • 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 $1,108). 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
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Sutton
Aylesbury
Chelmsford
Brentwood
Chichester
Wembley
Arundel

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 London

See prices for flight routes from nearby airports that may be better suited for you.

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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$272Average$933FlexibilityNo cancel feeOn-time60%
SWISSCheapest$336Average$908FlexibilityNo cancel feeOn-time79%
Norse Atlantic UKCheapest$395Average$688FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$418Average$760FlexibilityNo cancel feeOn-time72%
Scandinavian AirlinesCheapest$419Average$601FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$430Average$646FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$449Average$792FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$479Average$820FlexibilityNo cancel feeOn-time70%
KLMCheapest$486Average$810FlexibilityNo cancel feeOn-time75%
TAP AIR PORTUGALCheapest$509Average$671FlexibilityNo cancel feeOn-timeN/A

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.