Heathrow

$329+ 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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Feb 28 — Mar 71
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Cheapflights Tip: The best prices from Pasadena to London Heathrow are usually found in September or October, booked 35 days in advance, depart on a Wednesday or Tuesday and return on a Friday

Cheap 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 January 29, 2026.

This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/25:30 pm
LAX
-
LHR
1 stop14h 20m
Multiple Airlines
Fri 3/139:00 am
LHR
-
LAX
1 stop15h 35m
Multiple Airlines
Deal found 1/27$594
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/17:10 pm
LAX
-
LHR
1 stop14h 40m
SWISS
Mon 3/169:00 am
LHR
-
LAX
1 stop15h 35m
SWISS
Deal found 1/27$595
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/237:30 pm
LAX
-
LHR
1 stop14h 10m
Scandinavian Airlines
Mon 3/29:05 pm
LHR
-
LAX
2 stops27h 55m
Scandinavian Airlines
Deal found 1/26$596
This Cheapflightsfares deal was found by Cheapflights users on 1/28. 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.
Wed 2/257:10 pm
LAX
-
LHR
1 stop14h 40m
SWISS
Mon 3/29:00 am
LHR
-
LAX
1 stop15h 35m
SWISS
Deal found 1/28$597
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/54:35 pm
LAX
-
LHR
Nonstop10h 20m
Virgin Atlantic
Mon 3/168:25 pm
LHR
-
LAX
1 stop23h 20m
Virgin Atlantic
Deal found 1/26$598
This Kiwi.com deal was found by Cheapflights users on 1/28. 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.
Sun 2/227:30 pm
LAX
-
LHR
1 stop14h 10m
Scandinavian Airlines
Mon 3/29:05 pm
LHR
-
LAX
2 stops27h 55m
Scandinavian Airlines
Deal found 1/28$599
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/74:45 pm
LAX
-
LHR
1 stop18h 05m
TAP AIR PORTUGAL
Thu 4/306:45 pm
LHR
-
LAX
1 stop27h 50m
TAP AIR PORTUGAL
Deal found 1/27$600
This Cheapflightsfares deal was found by Cheapflights users on 1/28. 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.
Tue 4/74:45 pm
LAX
-
LHR
1 stop22h 10m
TAP AIR PORTUGAL
Tue 4/146:00 am
LHR
-
LAX
1 stop16h 45m
TAP AIR PORTUGAL
Deal found 1/28$601
This Booking.com deal was found by Cheapflights users on 1/28. 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.
Tue 3/34:35 pm
LAX
-
LHR
Nonstop10h 20m
Virgin Atlantic
Wed 3/116:30 am
LHR
-
LAX
1 stop13h 15m
Virgin Atlantic
Deal found 1/28$602
This Booking.com deal was found by Cheapflights users on 1/29. 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.
Thu 2/266:30 am
LAX
-
LHR
2 stops19h 40m
Multiple Airlines
Thu 3/59:00 am
LHR
-
LAX
1 stop15h 35m
Multiple Airlines
Deal found 1/29$603
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/264:35 pm
LAX
-
LHR
Nonstop10h 20m
Virgin Atlantic
Wed 3/1111:45 am
LHR
-
LAX
1 stop32h 00m
Virgin Atlantic
Deal found 1/27$604
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/225:30 pm
LAX
-
LHR
1 stop14h 10m
Lufthansa
Tue 4/287:25 am
LHR
-
LAX
1 stop15h 50m
Lufthansa
Deal found 1/26$605

Find flight deals from Pasadena to Heathrow

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$594
(Cheapflightsfares)

One-way from

$329
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$779
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. 8% potential increase in price ($72 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Average for round-trip flights in January 2026

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 January 29, 2026.
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 3/12

8:00 pm-1:30 pm

Nonstop10h 30m

London Heathrow

Thu 3/19

6:35 am-4:15 pm

1 stop16h 40m

$619

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 2/26

8:22 am-7:05 am

1 stop14h 43m

London Heathrow

Wed 3/11

6:30 am-12:45 pm

1 stop13h 15m

$621

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 2/26

10:10 am-8:05 am

1 stop13h 55m

London Heathrow

Sun 3/1

6:30 am-11:45 am

1 stop13h 15m

$624

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Mon 3/9

8:00 pm-1:30 pm

Nonstop10h 30m

London Heathrow

Mon 3/16

4:40 pm-4:15 pm

1 stop30h 35m

$629

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sun 3/15

8:30 pm-5:40 pm

1 stop14h 10m

London Heathrow

Sat 5/16

6:40 am-4:50 pm

1 stop18h 10m

$652

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Thu 3/12

1:25 pm-10:25 am

1 stop14h 00m

London Heathrow

Sat 3/21

3:20 pm-7:45 pm

Nonstop11h 25m

$652

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Fri 3/6

9:45 pm-8:10 pm

1 stop14h 25m

London Heathrow

Thu 3/12

10:45 am-10:20 pm

1 stop18h 35m

$662

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sat 3/28

10:50 pm-6:35 am

1 stop23h 45m

London Heathrow

Tue 4/7

1:05 pm-4:15 pm

Nonstop11h 10m

$671

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Fri 2/27

7:10 pm-9:25 pm

2 stops18h 15m

London Heathrow

Thu 3/5

7:30 pm-4:35 pm

2 stops29h 05m

$706

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Fri 4/24

2:10 pm-1:20 pm

1 stop15h 10m

London Heathrow

Thu 4/30

1:05 pm-4:15 pm

Nonstop11h 10m

$710

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/26

Showing 1-10 of 22 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 January 23, 2026.

To ensure you get the cheapest price possible for a flight from Pasadena to London Heathrow Airport, you should look to book at least 35 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, December is the cheapest month in which you can book a flight from Pasadena to London Heathrow Airport (average of $469). Flying from Pasadena to London Heathrow Airport in June is currently the most expensive (average of $699). 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 January 29, 2026.

When flying from Pasadena to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 30% versus a flight in the morning.

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 October 19, 2025.

Travelers seeking maximum savings on their Pasadena to London Heathrow Airport flight should consider departing on Wednesday mornings 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 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 January 29, 2026.

The most flights from P4S to LHR 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 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 January 29, 2026.
Get a feel of what it's like to fly with Delta, Virgin Atlantic, and United 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.

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

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.

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

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.

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

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.

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

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.

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

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.

Crew

8.5

Boarding

8.1

Comfort

7.9

Entertainment

7.8

Food

7.2

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 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, Delta, and KLM 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 4h 13m. 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 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 $139 on Norse Atlantic UK. Other airlines that offer cheap prices include TAP AIR PORTUGAL from $168 and Scandinavian Airlines from $223 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 Canada (93%), Austrian Airlines (93%) or United Airlines (93%) 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 $3,136 for a flight from Pasadena to London Heathrow Airport. The cheapest flight overall is $254 while the most popular route, (Los Angeles - London Heathrow) is currently priced at $460.

  • 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, December is the cheapest month in which you can book a flight from Pasadena to London Heathrow Airport (average of $469). Flying from Pasadena to London Heathrow Airport in June is currently the most expensive (average of $699). 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
Ilford
Hounslow
Southend-on-Sea
Harrow
Croydon
Eastleigh
Gatwick
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$273Average$806FlexibilityNo cancel feeOn-time62%
SWISSCheapest$336Average$663FlexibilityNo cancel feeOn-time79%
TAP AIR PORTUGALCheapest$375Average$571FlexibilityNo cancel feeOn-timeN/A
Norse Atlantic UKCheapest$458Average$750FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$468Average$621FlexibilityNo cancel feeOn-time77%
Aer LingusCheapest$476Average$675FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$485Average$690FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$525Average$757FlexibilityNo cancel feeOn-time70%
DeltaCheapest$540Average$754FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$549Average$874FlexibilityNo cancel feeOn-time75%

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