£243 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

Sun, 27 Sep - Wed, 21 Oct
Scandinavian Airlines Logo
16:45 - 21:40
SFO
-
LHR
20h 55m
1 stop
Scandinavian Airlines Logo
06:40 - 14:40
LHR
-
SFO
16h 00m
1 stop
£496Scandinavian Airlines
Sun, 26 Apr - Wed, 29 Apr
Scandinavian Airlines Logo
22:55 - 17:40
SFO
-
LHR
34h 45m
2 stops
Scandinavian Airlines Logo
17:00 - 14:40
LHR
-
SFO
29h 40m
1 stop
£499Scandinavian Airlines
Wed, 20 May - Fri, 28 Aug
Air Canada Logo
08:05 - 09:35
SFO
-
LHR
17h 30m
1 stop
Air Canada Logo
12:05 - 21:02
LHR
-
SFO
16h 57m
1 stop
£509Air Canada
Tue, 8 Sep - Wed, 16 Sep
Virgin Atlantic Logo
11:30 - 12:05
SJC
-
LHR
16h 35m
2 stops
Virgin Atlantic Logo
06:30 - 18:37
LHR
-
SJC
20h 07m
2 stops
£558Virgin Atlantic
Thu, 1 Oct - Tue, 24 Nov
Virgin Atlantic Logo
15:45 - 14:55
SJC
-
LHR
15h 10m
1 stop
Virgin Atlantic Logo
20:25 - 20:58
LHR
-
SJC
32h 33m
2 stops
£577Virgin Atlantic
Tue, 8 Sep - Wed, 16 Sep
Iberia Logo
12:02 - 14:25
SJC
-
LHR
18h 23m
1 stop
Iberia Logo
14:25 - 21:56
LHR
-
SJC
15h 31m
1 stop
£583Iberia
Wed, 26 Aug - Wed, 2 Sep
SWISS Logo
19:20 - 19:20
LAS
-
LHR
16h 00m
1 stop
SWISS Logo
08:40 - 15:45
LHR
-
LAS
15h 05m
1 stop
£630SWISS
Tue, 18 Aug - Tue, 25 Aug
Iberia Logo
11:00 - 09:00
SMF
-
LHR
14h 00m
1 stop
Iberia Logo
11:30 - 23:32
LHR
-
SMF
20h 02m
2 stops
£641Iberia
Tue, 6 Oct - Thu, 15 Oct
Air Canada Logo
13:15 - 06:30
SNA
-
LHR
33h 15m
2 stops
Air Canada Logo
06:00 - 12:18
LHR
-
SNA
38h 18m
2 stops
£652Air Canada
Wed, 2 Sep - Mon, 14 Sep
SWISS Logo
15:02 - 17:50
SNA
-
LHR
18h 48m
2 stops
SWISS Logo
06:00 - 20:51
LHR
-
SNA
22h 51m
2 stops
£664SWISS
Useful Info

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

Low seasonJanuary
Best time to beat the crowds (8% less expensive on average)
Most popular time to fly (5% 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
Salisbury
Chelmsford
Crawley

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

London Heathrow Airport (LHR)