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.

£213 CHEAP FLIGHTS from California to London Heathrow (LHR)

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Cheap Flights from California to Heathrow

Discover the best prices for you by selecting your travel dates on KAYAK.

Return

One-way

Last minute

Direct

Recent return flight deals from California to Heathrow

Sun, 22 Nov - Fri, 4 Dec

22:40 - 17:40ONT Ontario-LHR London Heathrow

35h 00m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen

19:30 - 23:23LHR London Heathrow-ONT Ontario

35h 53m2 stops Kastrup Copenhagen San Francisco

£478Multiple Airlines

Tue, 17 Nov - Tue, 24 Nov

10:35 - 21:40ONT Ontario-LHR London Heathrow

27h 05m3 stops Las Vegas Harry Reid Intl San Francisco Kastrup Copenhagen

06:40 - 00:24LHR London Heathrow-ONT Ontario

25h 44m2 stops Kastrup Copenhagen San Francisco

£505Multiple Airlines

Mon, 26 Oct - Tue, 10 Nov

12:16 - 09:00ONT Ontario-LHR London Heathrow

13h 44m1 stop Atlanta Hartsfield-Jackson

10:45 - 16:24LHR London Heathrow-ONT Ontario

13h 39m1 stop Salt Lake City

£555KLM

Mon, 22 Mar - Tue, 6 Apr

17:40 - 10:55SFO San Francisco-LHR London Heathrow

10h 15mdirect

06:30 - 11:45LHR London Heathrow-SFO San Francisco

13h 15m1 stop Amsterdam Schiphol

£557KLM

Sat, 23 Jan - Mon, 25 Jan

23:05 - 21:20SFO San Francisco-LHR London Heathrow

14h 15m1 stop Newark

13:45 - 16:30LHR London Heathrow-SFO San Francisco

34h 45m1 stop Zurich

£557United Airlines

Sat, 5 Dec - Sat, 19 Dec

20:35 - 15:10SFO San Francisco-LHR London Heathrow

10h 35mdirect

11:45 - 14:55LHR London Heathrow-SFO San Francisco

11h 10mdirect

£557British Airways

Mon, 15 Feb - Thu, 18 Feb

16:40 - 11:20SFO San Francisco-LHR London Heathrow

34h 40m1 stop Toronto Pearson Intl

09:00 - 16:30LHR London Heathrow-SFO San Francisco

15h 30m1 stop Zurich

£559United Airlines

Tue, 1 Dec - Sat, 19 Dec

20:35 - 15:10SFO San Francisco-LHR London Heathrow

10h 35mdirect

11:45 - 14:55LHR London Heathrow-SFO San Francisco

11h 10mdirect

£559British Airways

Mon, 9 Nov - Wed, 25 Nov

19:00 - 16:35LAX Los Angeles-LHR London Heathrow

13h 35m1 stop Paris Charles de Gaulle

06:20 - 13:00LHR London Heathrow-LAX Los Angeles

14h 40m1 stop Paris Charles de Gaulle

£570Air France

Mon, 9 Nov - Wed, 25 Nov

19:00 - 16:35LAX Los Angeles-LHR London Heathrow

13h 35m1 stop Paris Charles de Gaulle

06:20 - 13:00LHR London Heathrow-LAX Los Angeles

14h 40m1 stop Paris Charles de Gaulle

£573Air France

Recent last minute flight deals from California to Heathrow

Sun, 11 Oct - Mon, 26 Oct

10:20 - 16:50LAX Los Angeles-LHR London Heathrow

22h 30m1 stop Casablanca Mohamed V

17:10 - 08:20LHR London Heathrow-LAX Los Angeles

22h 10m1 stop Casablanca Mohamed V

£575Royal Air Maroc

Tue, 13 Oct - Mon, 19 Oct

10:20 - 16:50LAX Los Angeles-LHR London Heathrow

22h 30m1 stop Casablanca Mohamed V

18:10 - 08:20LHR London Heathrow-LAX Los Angeles

22h 10m1 stop Casablanca Mohamed V

£577Royal Air Maroc

Tue, 13 Oct - Tue, 10 Nov

16:20 - 17:45SFO San Francisco-LHR London Heathrow

17h 25m1 stop Lisbon Humberto Delgado

18:30 - 14:45LHR London Heathrow-SFO San Francisco

28h 15m1 stop Lisbon Humberto Delgado

£580TAP AIR PORTUGAL

Wed, 14 Oct - Wed, 11 Nov

16:35 - 17:45SFO San Francisco-LHR London Heathrow

17h 10m1 stop Lisbon Humberto Delgado

06:00 - 14:45LHR London Heathrow-SFO San Francisco

16h 45m1 stop Lisbon Humberto Delgado

£580TAP AIR PORTUGAL

Mon, 12 Oct - Sun, 25 Oct

19:30 - 13:55SFO San Francisco-LHR London Heathrow

10h 25mdirect

11:45 - 15:55LHR London Heathrow-SFO San Francisco

11h 10mdirect

£620British Airways

Tue, 13 Oct - Mon, 26 Oct

16:35 - 11:00SFO San Francisco-LHR London Heathrow

10h 25mdirect

11:45 - 15:55LHR London Heathrow-SFO San Francisco

11h 10mdirect

£646British Airways

Wed, 14 Oct - Thu, 22 Oct

23:15 - 17:35LAX Los Angeles-LHR London Heathrow

10h 20mdirect

09:55 - 13:10LHR London Heathrow-LAX Los Angeles

11h 15mdirect

£654KLM

Mon, 12 Oct - Mon, 19 Oct

17:30 - 15:40LAX Los Angeles-LHR London Heathrow

14h 10m1 stop Munich Franz Josef Strauss

06:30 - 13:10LHR London Heathrow-LAX Los Angeles

14h 40m1 stop Frankfurt am Main

£683Lufthansa

Mon, 12 Oct - Mon, 19 Oct

17:30 - 17:05LAX Los Angeles-LHR London Heathrow

15h 35m1 stop Munich Franz Josef Strauss

07:30 - 16:20LHR London Heathrow-LAX Los Angeles

16h 50m1 stop Frankfurt am Main

£690Lufthansa

Tue, 13 Oct - Tue, 27 Oct

17:55 - 12:15SFO San Francisco-LHR London Heathrow

10h 20mdirect

06:30 - 12:45LHR London Heathrow-SFO San Francisco

13h 15m1 stop Amsterdam Schiphol

£735KLM

Useful Info

Low season	January
High season	July
Cheapest flight	£213

Best time to beat the crowds (27% less expensive on average)

Most popular time to fly (15% more expensive on average)

Flight from San Diego to London Heathrow Airport

Verified travelerFlew with British Airways-Dec 2025

If not getting off in London make sure you have enough time to get to your connecting gates

Verified travelerFlew with Iberia-Jan 2026

Buy your flight directly from the airline because the cancellation process is purgatory

GeraldFlew with Virgin Atlantic-Jun 2025

Virgin Atlantic uses terminal 3. Much faster clearing customs than terminal 5

Verified travelerFlew with American Airlines-Jun 2025

Large number of passengers on the flight so arrive early to the airport and to the boarding gate

ValerieFlew with British Airways-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-Apr 2025

Eat at the lounge first so you are not stuck eating overcooked cheese ravioli

Verified travelerFlew with Iberia-Jan 2025

Make sure you arrive early. Sometimes, the traffic getting to LAX can be a total nightmare.

WeiFlew with British Airways-Sept 2024

Connection takes long, Make sure you plan enough time.

TapanFlew with British Airways-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-Mar 2024

Pack your own food if you have dietary restrictions and fly other airlines if possible

MichelleFlew with British Airways-May 2024

Make sure you separate your luggage tags from your tickets

ShaunaFlew with British Airways-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.

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.

Gatwick

Eastbourne

Milton Keynes

Hounslow

Luton

Northampton

Southend-on-Sea

Newport

Folkestone

Poole

Winchester

Swindon

Croydon

Slough

Stansted

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Crawley

Chichester

Maidstone

Salisbury

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£213 Find Cheap Flights from California to London Heathrow Airport – Compare and Save

Cheap Flights from California to Heathrow

Recent return flight deals from California to Heathrow

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Recent last minute flight deals from California to Heathrow

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

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

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