£248 Find Cheap Flights from California to London Heathrow Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Heathrow departing on 28/9. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Cheap Flights from California to Heathrow

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return flights from California to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent return flight deals from California to Heathrow

Fri, 8 May - Mon, 11 May
Scandinavian Airlines Logo
14:43 - 16:00
SFO
-
LHR
41h 17m
2 stops
Scandinavian Airlines Logo
06:40 - 14:40
LHR
-
SFO
40h 00m
2 stops
£488Scandinavian Airlines
Tue, 21 Apr - Fri, 24 Apr
Scandinavian Airlines Logo
16:45 - 16:25
SFO
-
LHR
39h 40m
2 stops
Scandinavian Airlines Logo
09:55 - 14:40
LHR
-
SFO
36h 45m
2 stops
£491Scandinavian Airlines
Thu, 23 Apr - Thu, 30 Apr
TAP AIR PORTUGAL Logo
19:55 - 22:55
SFO
-
LHR
19h 00m
1 stop
TAP AIR PORTUGAL Logo
06:00 - 17:55
LHR
-
SFO
19h 55m
1 stop
£494TAP AIR PORTUGAL
Thu, 23 Apr - Thu, 30 Apr
TAP AIR PORTUGAL Logo
19:55 - 10:20
SFO
-
LHR
30h 25m
1 stop
TAP AIR PORTUGAL Logo
08:00 - 17:55
LHR
-
SFO
17h 55m
1 stop
£496TAP AIR PORTUGAL
Mon, 20 Apr - Wed, 6 May
Air Canada Logo
13:20 - 13:20
SFO
-
LHR
16h 00m
1 stop
Air Canada Logo
09:30 - 21:02
LHR
-
SFO
19h 32m
1 stop
£497Air Canada
Mon, 20 Apr - Wed, 6 May
Air Canada Logo
13:20 - 13:20
SFO
-
LHR
16h 00m
1 stop
Air Canada Logo
12:05 - 21:10
LHR
-
SFO
17h 05m
1 stop
£499Air Canada
Tue, 28 Apr - Mon, 11 May
British Airways Logo
20:50 - 15:25
LAX
-
LHR
10h 35mdirect
British Airways Logo
11:40 - 14:50
LHR
-
LAX
11h 10mdirect
£515British Airways
Fri, 1 May - Fri, 15 May
British Airways Logo
17:05 - 11:35
LAX
-
LHR
10h 30mdirect
British Airways Logo
11:40 - 14:50
LHR
-
LAX
11h 10mdirect
£515British Airways
Mon, 13 Apr - Wed, 22 Apr
Multiple Airlines Logo
06:32 - 11:50
SAN
-
LHR
21h 18m
2 stops
Multiple Airlines Logo
07:25 - 15:25
LHR
-
SAN
16h 00m
1 stop
£576Multiple Airlines
Tue, 5 May - Tue, 12 May
Multiple Airlines Logo
13:55 - 17:50
SMF
-
LHR
19h 55m
2 stops
Multiple Airlines Logo
07:25 - 17:48
LHR
-
SMF
18h 23m
2 stops
£607Multiple Airlines
Useful Info

Good to know - Cheap tickets from California to London Heathrow Airport

Low seasonJanuary
Best time to beat the crowds (6% less expensive on average)
Most popular time to fly (6% more expensive on average)

Flights from California to Heathrow: the best tips from KAYAK users

Insights shared by verified travellers who flew the route from California to Heathrow 
Learn how KAYAK collects reviews and tips from users.
Verified travelerFlew with British Airways
SFO
-
LHR
Dec 2025
If not getting off in London make sure you have enough time to get to your connecting gates
Verified travelerFlew with Iberia
SFO
-
LHR
Jan 2026
Buy your flight directly from the airline because the cancellation process is purgatory
GeraldFlew with Virgin Atlantic
SFO
-
LHR
Jun 2025
Virgin Atlantic uses terminal 3. Much faster clearing customs than terminal 5
Verified travelerFlew with American Airlines
SFO
-
LHR
Jun 2025
Large number of passengers on the flight so arrive early to the airport and to the boarding gate
ValerieFlew with British Airways
LAX
-
LHR
Apr 2025
It was difficult to tell if the checked luggage was included. London Heathrow is huge and if the second flight hasn't been delayed I would have missed it.
PallaviFlew with British Airways
SFO
-
LHR
Apr 2025
Eat at the lounge first so you are not stuck eating overcooked cheese ravioli
Verified travelerFlew with Iberia
LAX
-
LHR
Jan 2025
Make sure you arrive early. Sometimes, the traffic getting to LAX can be a total nightmare.
WeiFlew with British Airways
LAX
-
LHR
Sept 2024
Connection takes long, Make sure you plan enough time.
TapanFlew with British Airways
SFO
-
LHR
Oct 2024
Great baggage policy in BA.. The worst part was experience at London Heathrow airport. Security was slow, too many people. Almost lost connecting flight even with 2 hours layover.
Verified travelerFlew with British Airways
LAX
-
LHR
Mar 2024
Pack your own food if you have dietary restrictions and fly other airlines if possible
MichelleFlew with British Airways
LAX
-
LHR
May 2024
Make sure you separate your luggage tags from your tickets
ShaunaFlew with British Airways
LAX
-
LHR
Dec 2023
I would suggest calling the airline to make sure that their TV screens work on the back of the seats, and if they don’t work that the entertainment option would work on your cell phones.

FAQs for booking California to London Heathrow Airport flights

  • How does KAYAK find such low prices on flights from California to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from California to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from California to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from California is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights from California to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional return ticket. You could then fly to London Heathrow Airport with an airline and back to California with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from California to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from California up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Travelling to a place near Heathrow?

Book flights to Heathrow if you plan to visit one of these locations
Gatwick
Milton Keynes
Eastbourne
Hounslow
Luton
Southend-on-Sea
Northampton
Swindon
Slough
Winchester
Croydon
Stansted
Folkestone
Poole
Chichester
Maidstone
Colchester
Chelmsford
Salisbury
Crawley

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

London Heathrow Airport (LHR)