$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
1 adult, Economy
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Find cheap flights from Pasadena to Heathrow 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 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 HeathrowExplore 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.
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![Multiple Airlines logo]()
$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![SWISS logo]()
$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![Scandinavian Airlines logo]()
$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![SWISS logo]()
$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![Virgin Atlantic logo]()
$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![Scandinavian Airlines logo]()
$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![TAP AIR PORTUGAL logo]()
$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![TAP AIR PORTUGAL logo]()
$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![Virgin Atlantic logo]()
$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![Multiple Airlines logo]()
$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![Virgin Atlantic logo]()
$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![Lufthansa logo]()
$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 |
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
Showing 1-10 of 22 results
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
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Crew
8.5
Boarding
8.1
Comfort
7.9
Entertainment
7.8
Food
7.2
Overall
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
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.
Traveling to a place near London Heathrow Airport?
Book flights to London Heathrow Airport if you plan to visit one of these locationsIlford
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
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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 January 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$273 | Average$806 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$336 | Average$663 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$375 | Average$571 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$458 | Average$750 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$468 | Average$621 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$476 | Average$675 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$485 | Average$690 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$525 | Average$757 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$540 | Average$754 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$549 | Average$874 | FlexibilityNo cancel fee | On-time75% |