$334+ Cheap flights from Pasadena, CA to London (LON)
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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — LON
Feb 15 — Feb 221
1 adult, Economy
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Find cheap flights from Pasadena to London 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 are usually found in September or October, booked 31 days in advance, depart on a Wednesday or Tuesday and return on a Friday
Cheap flight deals from Pasadena to London
Keep the following information in mind while searching for Pasadena to London flight deals. Data was last updated January 16, 2026.
Most accurate provider | Gotogate 3 stars |
|---|---|
Most trusted provider | Gotogate 3 stars |
Round-trip from | $615 (Delta) |
One-way from | $334 (Kiwi.com) |
Popular in | December |
Cheapest in | September |
Average price | $738 |
Find flight deals from Pasadena to London
Cheapest flights from Pasadena to LondonExplore the most affordable flight options available from Pasadena to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2026.
Explore the most affordable flight options available from Pasadena to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 16, 2026.
This Delta deal was found by Cheapflights users on 1/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2311:59 pm
LAX
- LHR
1 stop13h 11m
Delta
Fri 4/109:55 am
LHR
- LAX
Nonstop11h 15m
Delta
Deal found 1/15![Delta logo]()
$615
This Kiwi.com deal was found by Cheapflights users on 1/15. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/24:30 pm
LAX
- LGW
Nonstop10h 25m
Norse Atlantic UK
Sun 8/910:55 am
LGW
- LAX
Nonstop11h 15m
Norse Atlantic UK
Deal found 1/15![Norse Atlantic UK logo]()
$615
This United Airlines deal was found by Cheapflights users on 1/15. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:00 pm
LAX
- LHR
Nonstop10h 30m
United Airlines
Sat 2/289:00 am
LHR
- LAX
1 stop15h 35m
United Airlines
Deal found 1/15![United Airlines logo]()
$616
This SmartFares deal was found by Cheapflights users on 1/14. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/17:10 pm
LAX
- LGW
1 stop14h 40m
SWISS
Sun 3/86:40 pm
LGW
- LAX
1 stop29h 55m
SWISS
Deal found 1/14![SWISS logo]()
$616
This Kiwi.com deal was found by Cheapflights users on 1/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/85:30 pm
LAX
- STN
2 stops21h 05m
Multiple Airlines
Thu 2/198:30 am
STN
- LAX
1 stop17h 35m
Multiple Airlines
Deal found 1/14![Multiple Airlines logo]()
$616
This British Airways deal was found by Cheapflights users on 1/13. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/128:10 pm
LAX
- LHR
1 stop13h 10m
British Airways
Thu 4/308:20 am
LHR
- LAX
Nonstop11h 10m
British Airways
Deal found 1/13![British Airways logo]()
$617
This Mytrip deal was found by Cheapflights users on 1/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/164:15 pm
LAX
- LTN
2 stops20h 50m
Multiple Airlines
Thu 1/228:20 pm
LTN
- LAX
2 stops26h 00m
Multiple Airlines
Deal found 1/14![Multiple Airlines logo]()
$617
This Cheapflightsfares deal was found by Cheapflights users on 1/14. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:10 pm
LAX
- LCY
1 stop13h 55m
SWISS
Mon 2/239:15 am
LCY
- LAX
1 stop15h 20m
SWISS
Deal found 1/14![SWISS logo]()
$617
This Mytrip deal was found by Cheapflights users on 1/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/108:15 am
LAX
- LGW
2 stops19h 50m
Multiple Airlines
Thu 2/198:50 pm
LGW
- LAX
3 stops33h 10m
Multiple Airlines
Deal found 1/15![Multiple Airlines logo]()
$617
This Mytrip deal was found by Cheapflights users on 1/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/165:30 pm
LAX
- STN
2 stops18h 35m
Multiple Airlines
Tue 1/209:45 pm
STN
- LAX
2 stops25h 32m
Multiple Airlines
Deal found 1/14![Multiple Airlines logo]()
$617
This Scandinavian Airlines deal was found by Cheapflights users on 1/14. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/117:30 pm
LAX
- LHR
2 stops18h 05m
Scandinavian Airlines
Wed 2/257:50 pm
LHR
- LAX
2 stops29h 10m
Scandinavian Airlines
Deal found 1/14![Scandinavian Airlines logo]()
$618
This Kiwi.com deal was found by Cheapflights users on 1/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/203:05 pm
LAX
- LTN
2 stops20h 20m
Multiple Airlines
Wed 4/295:40 am
LTN
- LAX
1 stop20h 30m
Multiple Airlines
Deal found 1/14![Multiple Airlines logo]()
$618
Cheapflights Fare Finder
Customize your flight search to find flights from Pasadena to London 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 16, 2026.
Use the filters below to find and compare flights from Pasadena to London that are best for you.
Fly from
Pasadena
Fly to
London
Route
Depart
Return
Price
Los AngelesLondon
LAX - LHR
LAXLHR
Los Angeles
Mon 3/23
6:19 am-6:55 am
1 stop17h 36m
London Heathrow
Fri 4/10
5:00 pm-8:20 pm
Nonstop11h 20m
$615
Los AngelesLondon
LAX - LHR
LAXLHR
Los Angeles
Sun 3/22
1:20 pm-2:50 pm
1 stop18h 30m
London Heathrow
Fri 4/10
5:00 pm-8:20 pm
Nonstop11h 20m
$615
Los AngelesLondon
LAX - LHR
LAXLHR
Los Angeles
Wed 3/25
12:10 pm-9:40 am
1 stop14h 30m
London Heathrow
Fri 4/10
5:00 pm-8:20 pm
Nonstop11h 20m
$615
Los AngelesLondon
LAX - LHR
LAXLHR
Los Angeles
Fri 2/27
7:00 pm-1:30 pm
Nonstop10h 30m
London Heathrow
Wed 3/4
3:20 pm-6:45 pm
Nonstop11h 25m
$618
Los AngelesLondon
LAX - LHR
LAXLHR
Los Angeles
Wed 2/25
7:00 pm-1:30 pm
Nonstop10h 30m
London Heathrow
Mon 3/9
3:20 pm-7:45 pm
Nonstop11h 25m
$618
Los AngelesLondon
LAX - LHR
LAXLHR
Los Angeles
Thu 2/26
7:00 pm-1:30 pm
Nonstop10h 30m
London Heathrow
Wed 3/4
3:20 pm-6:45 pm
Nonstop11h 25m
$618
Los AngelesLondon
LAX - LTN
LAXLTN
Los Angeles
Wed 4/1
8:10 pm-9:35 pm
1 stop17h 25m
London Luton
Wed 4/8
6:15 am-6:25 pm
1 stop20h 10m
$619
Los AngelesLondon
LAX - LTN
LAXLTN
Los Angeles
Thu 2/12
8:15 am-8:55 pm
3 stops28h 40m
London Luton
Thu 2/19
9:40 pm-3:15 pm
2 stops25h 35m
$620
Los AngelesLondon
LAX - LTN
LAXLTN
Los Angeles
Thu 4/16
8:05 am-6:05 pm
2 stops26h 00m
London Luton
Mon 4/20
5:40 am-6:10 pm
1 stop20h 30m
$620
Los AngelesLondon
LAX - LGW
LAXLGW
Los Angeles
Mon 2/23
7:10 pm-5:50 pm
1 stop14h 40m
London Gatwick
Fri 3/6
6:40 pm-4:35 pm
1 stop29h 55m
$621
Showing 1-10 of 60 results
Best time to book a flight from Pasadena to London
Have a flexible travel schedule? Discover the best time to fly to London 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
How far ahead should I book a flight from Pasadena to London?
Use this chart to determine the optimal time to book a round-trip flight from Pasadena to London. Price data was last updated on January 9, 2026.
Booking 31 days in advance of your planned departure date is, on average, the best time to get cheap flights from Pasadena to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Pasadena to London?
Currently, October is the cheapest month in which you can book a flight from Pasadena to London (average of $222). Flying from Pasadena to London in January is currently the most expensive (average of $565). 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 LON?
Find hourly flight availability from Pasadena to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 16, 2026.
It’s optimal to fly from Pasadena to London in the afternoon. By choosing this option you can save up to 33% on the cost of your flight, compared to a flight in the morning.
What is the cheapest day to fly from Pasadena to London?
Use this chart to determine the cheapest time to fly round-trip from Pasadena to London. Price data was last updated on January 10, 2026.
Travelers seeking maximum savings on their Pasadena to London flight should consider departing on Tuesday afternoons 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
Explore weekly flight availability from Pasadena to London. 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 16, 2026.
The most flights from P4S to LON are scheduled on a Thursday (51 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (45 on average).
Reviews of airlines servicing London
Get insights into the airlines that provide service to London. 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 London. Reviews last updated January 16, 2026.
Read reviews from past customers who have flown Delta, American Airlines, and Norse Atlantic UK from Pasadena to London. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Norse Atlantic UK
Comfort
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
LAX - LHR
Comfort
7.9
Boarding
8.1
Crew
8.5
Food
7.2
Overall
7.9
Entertainment
7.8
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 London. 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?
Book flights to London if you plan to visit one of these locationsIlford
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Croydon
Orpington
Watford
Hayes
Borehamwood
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Eastbourne
Sutton
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Pasadena to London
See prices for flight routes from nearby airports that may be better suited for you.
Top 10 airlines flying from Pasadena to London
Discover the top 10 airlines that operate flights from Pasadena to London. 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 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$273 | Average$806 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$336 | Average$900 | FlexibilityNo cancel fee | On-time79% | |
| Cheapest$350 | Average$680 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$375 | Average$585 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$440 | Average$620 | FlexibilityNo cancel fee | On-time77% | |
| Cheapest$469 | Average$740 | FlexibilityNo cancel fee | On-time72% | |
| Cheapest$476 | Average$679 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$485 | Average$690 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$498 | Average$748 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$542 | Average$779 | FlexibilityNo cancel fee | On-timeN/A |