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$360+ 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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LHR
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
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 35 days in advance, depart on a Wednesday or Tuesday and return on a Saturday

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 December 15, 2025.

This Gotogate deal was found by Cheapflights users on 12/15. 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.
Tue 12/307:30 pmLAX - LHR
1 stop14h 10mScandinavian Airlines
Sat 2/75:00 pmLHR - LAX
1 stop32h 00mScandinavian Airlines
Deal found 12/15$628
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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 12/317:00 pmLAX - LHR
Nonstop10h 30mMultiple Airlines
Fri 1/169:00 amLHR - LAX
1 stop15h 35mMultiple Airlines
Deal found 12/15$631
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Wed 12/317:00 pmLAX - LHR
Nonstop10h 30mUnited Airlines
Tue 3/109:00 amLHR - LAX
1 stop15h 35mUnited Airlines
Deal found 12/14$635
This Gotogate deal was found by Cheapflights users on 12/13. 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.
Mon 12/297:30 pmLAX - LHR
1 stop29h 50mScandinavian Airlines
Sun 3/1510:20 amLHR - LAX
1 stop14h 40mScandinavian Airlines
Deal found 12/13$636
This KAYAK deal was found by Cheapflights users on 12/14. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:30 pmLAX - LHR
1 stop15h 00mScandinavian Airlines
Wed 1/149:55 amLHR - LAX
2 stops39h 05mScandinavian Airlines
Deal found 12/14$638
This Delta deal was found by Cheapflights users on 12/13. 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.
Sun 12/2811:55 pmLAX - LHR
1 stop23h 10mDelta
Wed 1/216:30 amLHR - LAX
1 stop13h 15mDelta
Deal found 12/13$640
This Air Canada deal was found by Cheapflights users on 12/13. 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 12/318:20 amLAX - LHR
1 stop14h 50mAir Canada
Fri 1/166:50 amLHR - LAX
2 stops23h 10mAir Canada
Deal found 12/13$641
This United Airlines deal was found by Cheapflights users on 12/13. 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.
Sun 12/2810:55 pmLAX - LHR
1 stop25h 35mUnited Airlines
Tue 1/206:35 amLHR - LAX
1 stop16h 40mUnited Airlines
Deal found 12/13$642
This Scandinavian Airlines deal was found by Cheapflights users on 12/13. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:30 pmLAX - LHR
1 stop15h 00mScandinavian Airlines
Thu 4/309:05 pmLHR - LAX
2 stops27h 45mScandinavian Airlines
Deal found 12/13$643
This Cheapflightsfares deal was found by Cheapflights users on 12/13. 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 12/317:10 pmLAX - LHR
1 stop14h 40mMultiple Airlines
Fri 1/94:20 pmLHR - LAX
1 stop16h 39mMultiple Airlines
Deal found 12/13$645
This Expedia deal was found by Cheapflights users on 12/13. 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.
Tue 12/305:40 pmLAX - LHR
Nonstop10h 40mIberia
Thu 4/306:10 amLHR - LAX
1 stop20h 00mIberia
Deal found 12/13$646
This Scandinavian Airlines deal was found by Cheapflights users on 12/13. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:30 pmLAX - LHR
1 stop15h 00mScandinavian Airlines
Fri 5/16:40 amLHR - LAX
1 stop18h 10mScandinavian Airlines
Deal found 12/13$647

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 December 15, 2025.

Most accurate provider

Gotogate
3 stars

Most trusted provider

Gotogate
3 stars

Round-trip from

$622
(Cheapflightsfares)

One-way from

$360
(WestJet)

Popular in

December

Cheapest in

October

Average price

$1,074
Provider with most accurate pricing for Los Angeles-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-London (LON) flights.
Search Deals
From Pasadena to London Heathrow
Search Deals
One-way flight from Pasadena to London Heathrow
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($72 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 15, 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

Mon 2/16

7:00 pm-1:30 pm

Nonstop10h 30m

London Heathrow

Mon 2/23

3:20 pm-6:45 pm

Nonstop11h 25m

$642

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sun 2/8

4:35 pm-10:55 am

Nonstop10h 20m

London Heathrow

Sat 2/21

5:20 pm-8:40 pm

Nonstop11h 20m

$642

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sat 1/10

7:00 pm-1:30 pm

Nonstop10h 30m

London Heathrow

Wed 1/21

3:20 pm-6:45 pm

Nonstop11h 25m

$642

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Sat 2/14

7:00 pm-1:30 pm

Nonstop10h 30m

London Heathrow

Mon 2/23

3:20 pm-6:45 pm

Nonstop11h 25m

$642

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Mon 1/12

10:30 pm-4:50 pm

Nonstop10h 20m

London Heathrow

Sun 1/25

11:20 am-2:35 pm

Nonstop11h 15m

$644

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Tue 1/6

10:26 am-7:25 am

1 stop12h 59m

London Heathrow

Wed 1/14

3:20 pm-6:45 pm

Nonstop11h 25m

$676

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Tue 1/6

10:26 am-7:25 am

1 stop12h 59m

London Heathrow

Tue 1/13

2:30 pm-9:08 pm

1 stop14h 38m

$676

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 1/14

7:30 pm-6:30 pm

1 stop15h 00m

London Heathrow

Sat 1/17

6:40 am-8:16 pm

2 stops21h 36m

$679

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Tue 12/30

7:00 pm-1:30 pm

Nonstop10h 30m

London Heathrow

Sat 2/7

6:35 am-3:15 pm

1 stop16h 40m

$685

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Fri 1/2

6:00 am-7:25 am

1 stop17h 25m

London Heathrow

Tue 1/27

1:45 pm-4:35 pm

1 stop34h 50m

$698

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 23 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 December 12, 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 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 $698). 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 December 15, 2025.

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 in the afternoon, which can drop the price by up to 18% versus a flight in the evening.

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 Sunday mornings when fares are most often at their lowest. Saturday 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 December 15, 2025.

The most flights from P4S to LHR are scheduled on a Monday (52 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (36 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 December 15, 2025.
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.
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7.5
Good
675 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
9,092 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
3,051 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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
7,575 reviews
Delta
7.9
Good
8,008 reviews

Crew

8.5

Boarding

8.1

Overall

7.9

Entertainment

7.9

Comfort

7.9

Food

7.3

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 and Delta fly from Pasadena to London Heathrow Airport in about 10h 20m. The time it takes to get you to your destination is usually consistent. Pasadena and London Heathrow Airport are separated by a distance of 5439 mi. Generally, flights for this route are nonstop.

  • 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 $172 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 (90%), Austrian Airlines (90%) or United Airlines (90%) 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 $3,098 for a flight from Pasadena to London Heathrow Airport. The cheapest flight overall is $266 while the most popular route, (Los Angeles - London Heathrow) is currently priced at $419.

  • 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 $698). 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
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Wembley

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Alternative routes for Pasadena to Heathrow

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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$273Average$806FlexibilityNo cancel feeOn-time62%
SWISSCheapest$336Average$686FlexibilityNo cancel feeOn-time79%
Scandinavian AirlinesCheapest$420Average$602FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$427Average$899FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$427Average$610FlexibilityNo cancel feeOn-timeN/A
Norse Atlantic UKCheapest$463Average$752FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$469Average$798FlexibilityNo cancel feeOn-time72%
Aer LingusCheapest$476Average$683FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$486Average$694FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$530Average$814FlexibilityNo cancel feeOn-time70%

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