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$177+ 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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Pasadena to London Heathrow are usually found in October or September, booked 87 days in advance, depart on a Wednesday or Tuesday and return on a Thursday

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 September 11, 2025.

Round-trip from

$500
(Kiwi.com)

One-way from

$177
(FlightHub)

Popular in

December

Cheapest in

October

Average price

$666
From Pasadena to London Heathrow
Search Deals
One-way flight from Pasadena to London Heathrow
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Highest demand for flights based on searches. 7% potential increase in price ($66 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/294:45 pmLAX - LHR
1 stop21h 55mTAP AIR PORTUGAL
Sat 12/66:00 amLHR - LAX
1 stop17h 00mTAP AIR PORTUGAL
Deal found 9/11$500
This TAP AIR PORTUGAL deal was found by Cheapflights users on 9/11. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/244:40 pmLAX - LHR
1 stop17h 05mTAP AIR PORTUGAL
Fri 10/316:30 pmLHR - LAX
1 stop28h 30mTAP AIR PORTUGAL
Deal found 9/11$502
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/44:45 pmLAX - LHR
1 stop18h 10mTAP AIR PORTUGAL
Mon 12/158:15 amLHR - LAX
1 stop38h 45mTAP AIR PORTUGAL
Deal found 9/11$505
This Gurufare deal was found by Cheapflights users on 9/10. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/114:45 pmLAX - LHR
1 stop34h 40mTAP AIR PORTUGAL
Mon 12/296:30 pmLHR - LAX
1 stop28h 30mTAP AIR PORTUGAL
Deal found 9/10$508
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/214:40 pmLAX - LHR
1 stop17h 05mTAP AIR PORTUGAL
Mon 11/36:30 pmLHR - LAX
1 stop28h 30mTAP AIR PORTUGAL
Deal found 9/10$512
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/214:40 pmLAX - LHR
1 stop17h 05mTAP AIR PORTUGAL
Sat 11/16:00 amLHR - LAX
1 stop17h 00mTAP AIR PORTUGAL
Deal found 9/10$513
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/134:45 pmLAX - LHR
1 stop21h 55mTAP AIR PORTUGAL
Fri 11/217:55 pmLHR - LAX
1 stop27h 05mTAP AIR PORTUGAL
Deal found 9/11$514
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/174:40 pmLAX - LHR
1 stop17h 05mTAP AIR PORTUGAL
Wed 10/296:30 pmLHR - LAX
1 stop28h 30mTAP AIR PORTUGAL
Deal found 9/10$517
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/74:40 pmLAX - LHR
1 stop17h 05mTAP AIR PORTUGAL
Sat 10/116:00 amLHR - LAX
1 stop16h 40mTAP AIR PORTUGAL
Deal found 9/10$518
This Kiwi.com deal was found by Cheapflights users on 9/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/24:45 pmLAX - LHR
1 stop16h 45mTAP AIR PORTUGAL
Thu 12/116:00 amLHR - LAX
1 stop16h 40mTAP AIR PORTUGAL
Deal found 9/11$519
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/254:40 pmLAX - LHR
1 stop37h 00mTAP AIR PORTUGAL
Sat 11/16:00 amLHR - LAX
1 stop17h 00mTAP AIR PORTUGAL
Deal found 9/10$520

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 September 11, 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

Tue 10/7

4:40 pm-11:10 am

Nonstop10h 30m

London Heathrow

Tue 10/14

8:45 am-4:30 pm

1 stop15h 45m

$554

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sun 2/8

12:34 pm-9:40 am

1 stop13h 06m

London Heathrow

Tue 2/17

10:20 am-5:05 pm

1 stop14h 45m

$561

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 11/6

1:12 pm-6:30 pm

2 stops21h 18m

London Heathrow

Thu 11/13

10:20 am-5:00 pm

1 stop14h 40m

$561

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 12/3

7:30 pm-9:20 pm

2 stops41h 50m

London Heathrow

Sat 12/6

5:30 pm-5:00 pm

2 stops31h 30m

$567

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 10/8

4:40 pm-11:10 am

Nonstop10h 30m

London Heathrow

Tue 10/14

1:05 pm-4:15 pm

Nonstop11h 10m

$572

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 10/15

4:40 pm-11:10 am

Nonstop10h 30m

London Heathrow

Tue 10/21

1:05 pm-4:15 pm

Nonstop11h 10m

$572

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sun 10/26

8:00 pm-1:30 pm

Nonstop10h 30m

London Heathrow

Fri 11/7

3:20 pm-6:45 pm

Nonstop11h 25m

$572

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Tue 10/7

4:40 pm-11:10 am

Nonstop10h 30m

London Heathrow

Thu 10/30

3:20 pm-7:45 pm

Nonstop11h 25m

$572

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 10/1

8:05 am-6:30 am

1 stop14h 25m

London Heathrow

Tue 10/14

1:05 pm-4:15 pm

Nonstop11h 10m

$572

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 10/8

4:40 pm-11:10 am

Nonstop10h 30m

London Heathrow

Thu 10/16

9:30 am-9:35 pm

1 stop20h 05m

$572

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 23 results
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2
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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 August 29, 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 87 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 $1,098). 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 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 September 11, 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 December 16, 2024.

Travelers seeking maximum savings on their Pasadena to London Heathrow Airport flight should consider departing on Tuesday at noon when fares are most often at their lowest. Wednesday mornings 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 September 11, 2025.

The most flights from P4S to LHR are scheduled on a Monday (56 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (41 on average).

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 September 11, 2025.
Get a feel of what it's like to fly with Delta, Virgin Atlantic, and American Airlines from Pasadena to London Heathrow Airport by reading reviews from past customers. 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
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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.
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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.
Iberia
7.0
Good
2,929 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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.
British Airways
6.7
Okay
7,361 reviews
Delta
8.0
Very good
7,960 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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.

  • How long is the flight from Pasadena to London Heathrow Airport?

    Airlines like United Airlines, Finnair, and Scandinavian Airlines fly from Pasadena to London Heathrow Airport in about 10h 30m. The time it takes to get you to your destination can typically vary by up to 10h 48m. Pasadena and London Heathrow Airport are separated by a distance of 5439 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 KLM (94%), Air France (94%) or Delta (94%) 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 $3,099 for a flight from Pasadena to London Heathrow Airport. The cheapest flight overall is $347 while the most popular route, (Los Angeles - London Heathrow) is currently priced at $473.

  • 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 $1,098). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone

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.
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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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
WestJetCheapest$272Average$1,046FlexibilityNo cancel feeOn-time60%
JetBlueCheapest$273Average$795FlexibilityNo cancel feeOn-time62%
SWISSCheapest$336Average$686FlexibilityNo cancel feeOn-time79%
LufthansaCheapest$363Average$778FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$375Average$660FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$419Average$594FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$469Average$892FlexibilityNo cancel feeOn-time72%
Aer LingusCheapest$475Average$724FlexibilityNo cancel feeOn-timeN/A
Norse Atlantic UKCheapest$477Average$744FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$492Average$705FlexibilityNo cancel feeOn-time76%

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