Heathrow

$267+ Cheap flights from Pasadena, CA to Heathrow (LHR)

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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Apr 7 — Apr 141
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Cheapflights Tip: The best prices from Pasadena to London Heathrow are usually found in October or September, booked 83 days in advance, depart on a Wednesday or Tuesday and return on a Wednesday

Cheap flight deals from Pasadena to Heathrow

Keep the following information in mind while searching for Pasadena to Heathrow flight deals. Data was last updated April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$582
(Cheapflightsfares)

One-way from

$267
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$671
Provider with most accurate pricing for Los Angeles-London (LON) flight deals.
Provider most trusted by Cheapflights users for Los Angeles-London (LON) flights.
From Pasadena to London Heathrow
One-way flight from Pasadena to London Heathrow
Highest demand for flights based on searches. 18% potential increase in price ($186 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
Average for round-trip flights in April 2025

Find flight deals from Pasadena to Heathrow

Cheapest flights from Pasadena to Heathrow
Explore the most affordable flight options available from Pasadena to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 2, 2025.

This Finnair deal was found by Cheapflights users on 4/1. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/179:25 pmLAX - LHR
Nonstop10h 40mFinnair
Tue 4/227:30 amLHR - LAX
1 stop17h 35mFinnair
Deal found 4/1$582
This Booking.com deal was found by Cheapflights users on 3/31. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/118:05 pmLAX - LHR
Nonstop10h 30mIberia
Mon 5/192:20 pmLHR - LAX
Nonstop11h 15mIberia
Deal found 3/31$583
This SmartFares deal was found by Cheapflights users on 4/1. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/297:30 pmLAX - LHR
1 stop14h 10mScandinavian Airlines
Tue 10/77:30 pmLHR - LAX
1 stop28h 50mScandinavian Airlines
Deal found 4/1$584
This Booking.com deal was found by Cheapflights users on 4/1. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/198:15 pmLAX - LHR
1 stop16h 05mAer Lingus
Thu 4/248:50 amLHR - LAX
1 stop17h 35mAer Lingus
Deal found 4/1$585
This World Air Fares deal was found by Cheapflights users on 4/1. 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 World Air Fares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/34:35 pmLAX - LHR
Nonstop10h 35mLufthansa
Tue 5/131:05 pmLHR - LAX
Nonstop11h 10mLufthansa
Deal found 4/1$589
This Mytrip deal was found by Cheapflights users on 3/31. 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.
Mon 4/217:55 pmLAX - LHR
1 stop33h 25mMultiple Airlines
Wed 5/78:40 amLHR - LAX
1 stop15h 50mMultiple Airlines
Deal found 3/31$591
This American Airlines deal was found by Cheapflights users on 4/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/85:05 pmLAX - LHR
Nonstop10h 30mAmerican Airlines
Sun 8/3110:20 amLHR - LAX
1 stop14h 45mAmerican Airlines
Deal found 4/1$592
This United deal was found by Cheapflights users on 4/1. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/224:35 pmLAX - LHR
Nonstop10h 35mUnited Airlines
Mon 4/288:40 amLHR - LAX
1 stop15h 50mUnited Airlines
Deal found 4/1$603
This Air Canada deal was found by Cheapflights users on 3/31. 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.
Wed 4/308:30 amLAX - LHR
2 stops19h 20mAir Canada
Wed 5/148:40 amLHR - LAX
2 stops19h 10mAir Canada
Deal found 3/31$609
This SWISS deal was found by Cheapflights users on 3/31. 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.
Tue 4/87:35 pmLAX - LHR
1 stop14h 15mSWISS
Mon 4/148:40 amLHR - LAX
1 stop15h 50mSWISS
Deal found 3/31$621
This British Airways deal was found by Cheapflights users on 3/31. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/288:05 pmLAX - LHR
Nonstop10h 30mBritish Airways
Mon 10/132:20 pmLHR - LAX
Nonstop11h 15mBritish Airways
Deal found 3/31$648
This TAP AIR PORTUGAL deal was found by Cheapflights users on 4/1. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/304:40 pmLAX - LHR
1 stop17h 05mTAP AIR PORTUGAL
Fri 10/176:00 amLHR - LAX
1 stop16h 35mTAP AIR PORTUGAL
Deal found 4/1$651

Cheapflights Fare Finder

Customize your flight search to find flights from Pasadena to Heathrow 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 April 2, 2025.
Use the filters below to find and compare flights from Pasadena to London Heathrow Airport that are best for you.

Fly from

Pasadena

Fly to

Heathrow

Route

Depart

Return

Price

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 4/24

11:46 am-10:20 am

1 stop14h 34m

London Heathrow

Wed 5/14

10:10 am-1:25 pm

Nonstop11h 15m

$582

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 4/17

8:15 pm-8:20 pm

1 stop16h 05m

London Heathrow

Mon 5/12

8:50 am-6:25 pm

1 stop17h 35m

$584

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 4/17

1:21 pm-10:30 am

1 stop13h 09m

London Heathrow

Thu 4/24

7:30 am-5:05 pm

1 stop17h 35m

$587

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sat 5/3

4:35 pm-11:10 am

Nonstop10h 35m

London Heathrow

Tue 5/13

1:05 pm-4:15 pm

Nonstop11h 10m

$589

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Mon 4/21

7:55 pm-1:20 pm

1 stop33h 25m

London Heathrow

Wed 5/7

8:40 am-4:30 pm

1 stop15h 50m

$591

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Fri 8/8

5:05 pm-11:35 am

Nonstop10h 30m

London Heathrow

Sun 8/31

10:20 am-5:05 pm

1 stop14h 45m

$592

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Tue 9/9

7:30 pm-9:40 pm

1 stop18h 10m

London Heathrow

Thu 9/18

10:20 am-4:20 pm

1 stop14h 00m

$598

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Tue 4/22

4:35 pm-11:10 am

Nonstop10h 35m

London Heathrow

Mon 4/28

8:40 am-4:30 pm

1 stop15h 50m

$603

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 4/30

8:30 am-11:50 am

2 stops19h 20m

London Heathrow

Wed 5/14

8:40 am-7:50 pm

2 stops19h 10m

$609

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sun 5/4

3:05 pm-8:45 am

1 stop33h 40m

London Heathrow

Sun 5/18

6:00 am-1:05 pm

1 stop15h 05m

$633

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 30 results
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Best time to book a flight from Pasadena to Heathrow

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

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

Use this chart to determine the optimal time to book a round-trip flight from Pasadena to Heathrow. Price data was last updated on March 28, 2025.

To ensure you get the cheapest price possible for a flight from Pasadena to London Heathrow Airport, you should look to book at least 83 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, November is the cheapest month in which you can book a flight from Pasadena to London Heathrow Airport (average of $661). Flying from Pasadena to London Heathrow Airport in June is currently the most expensive (average of $1,110). 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 LHR?

Find hourly flight availability from Pasadena to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 2, 2025.

When flying from Pasadena to London Heathrow Airport, 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 Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Pasadena to Heathrow. Price data was last updated on May 12, 2024.

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

Weekly flight availability from Pasadena to London Heathrow Airport

Explore weekly flight availability from Pasadena to Heathrow. 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 April 2, 2025.

The most flights from P4S to LHR are scheduled on a Monday (58 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (43 on average).

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport 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 Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated April 2, 2025.
Get a feel of what it's like to fly with Delta, KLM and Finnair from Pasadena to London by reading reviews from past customers. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

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.
8.0
Very good
8.0
Very good

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

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.
8.0
Very good

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

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.
8.0
Very good

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

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.
8.0
Very good

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

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.
8.0
Very good

Overall

8.0

Food

7.3

Boarding

8.2

Comfort

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 Pasadena to Heathrow. 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 Heathrow Airport one-way?

    One-way options have recently been found by users for as low as $369 on British Airways. Other airlines that offer cheap prices include Air Canada from $377 and Iberia from $379 one-way.

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

    No one likes to see their flight delayed. When booking a flight from Pasadena to London Heathrow Airport consider choosing Air France (91%), Delta (91%) or Aeromexico (91%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Pasadena to London Heathrow Airport?

    On average you can expect to pay $3,212 for a flight from Pasadena to London Heathrow Airport. The cheapest flight overall is $448 while the most popular route, (Los Angeles - London Heathrow) is currently priced at $477.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Pasadena to Heathrow 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 Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Pasadena to London Heathrow Airport (average of $661). Flying from Pasadena to London Heathrow Airport in June is currently the most expensive (average of $1,110). 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
Luton
Wembley
Harrow
Horley
Canterbury
Dover
Gatwick
Orpington
Watford
Milton Keynes
Northampton
Stratford-upon-Avon
Croydon
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Folkestone
Ilford
Broadway

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Pasadena to Heathrow

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

Top 10 airlines flying from Pasadena to Heathrow

Discover the top 10 airlines that operate flights from Pasadena to Heathrow. 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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$272Average$807FlexibilityNo cancel feeOn-time60%
Scandinavian AirlinesCheapest$414Average$601FlexibilityNo cancel feeOn-time77%
Air FranceCheapest$447Average$646FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$454Average$867FlexibilityNo cancel feeOn-time72%
Norse Atlantic UKCheapest$463Average$700FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$463Average$737FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$467Average$830FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$514Average$691FlexibilityNo cancel feeOn-timeN/A
SWISSCheapest$533Average$752FlexibilityNo cancel feeOn-time79%
Aer LingusCheapest$558Average$749FlexibilityNo cancel feeOn-timeN/A

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