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 travelers 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 round-trip 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.

$267 CHEAP FLIGHTS from California to London Heathrow (LHR)

Save 25% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Cheap Flights from California to Heathrow

Cheap flights from California to Heathrow with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Round-trip

One-way

Last minute

Direct

Mon, Nov 16 - Mon, Nov 23

12:01 pm - 4:00 pmONT Ontario-LHR London Heathrow

19h 59m2 stops San Francisco Kastrup Copenhagen

6:40 am - 8:30 amLHR London Heathrow-ONT Ontario

33h 50m3 stops Kastrup Copenhagen San Francisco Las Vegas Harry Reid Intl

$620Multiple Airlines

Mon, Nov 16 - Sat, Nov 21

12:01 pm - 4:00 pmONT Ontario-LHR London Heathrow

19h 59m2 stops San Francisco Kastrup Copenhagen

6:40 am - 12:24 amLHR London Heathrow-ONT Ontario

25h 44m2 stops Kastrup Copenhagen San Francisco

$623Multiple Airlines

Thu, Dec 10 - Mon, Dec 14

4:45 pm - 9:40 pmSFO San Francisco-LHR London Heathrow

20h 55m1 stop Kastrup Copenhagen

6:40 am - 2:50 pmLHR London Heathrow-SFO San Francisco

16h 10m1 stop Kastrup Copenhagen

$722Scandinavian Airlines

Fri, Apr 2 - Sun, Apr 11

4:45 pm - 4:00 pmSFO San Francisco-LHR London Heathrow

15h 15m1 stop Kastrup Copenhagen

6:40 pm - 2:40 pmLHR London Heathrow-SFO San Francisco

28h 00m1 stop Kastrup Copenhagen

$722Scandinavian Airlines

Wed, Mar 10 - Fri, Mar 12

2:45 pm - 11:50 amSFO San Francisco-LHR London Heathrow

13h 05m1 stop Vancouver Intl

9:00 am - 4:30 pmLHR London Heathrow-SFO San Francisco

15h 30m1 stop Zurich

$731United Airlines

Mon, Jan 25 - Wed, Jan 27

4:40 pm - 11:15 amSFO San Francisco-LHR London Heathrow

10h 35mnonstop

9:00 am - 4:30 pmLHR London Heathrow-SFO San Francisco

15h 30m1 stop Zurich

$731United Airlines

Mon, Mar 15 - Mon, Apr 5

5:35 pm - 10:40 pmSFO San Francisco-LHR London Heathrow

22h 05m1 stop Lisbon Humberto Delgado

7:50 pm - 2:35 pmLHR London Heathrow-SFO San Francisco

26h 45m1 stop Lisbon Humberto Delgado

$731TAP AIR PORTUGAL

Fri, Dec 11 - Wed, Dec 16

7:15 pm - 9:35 pmSFO San Francisco-LHR London Heathrow

18h 20m1 stop Lisbon Humberto Delgado

6:00 am - 2:45 pmLHR London Heathrow-SFO San Francisco

16h 45m1 stop Lisbon Humberto Delgado

$732TAP AIR PORTUGAL

Wed, Oct 28 - Wed, Nov 4

9:00 am - 6:50 amSFO San Francisco-LHR London Heathrow

14h 50m1 stop Dallas/Fort Worth

3:35 pm - 12:43 amLHR London Heathrow-SFO San Francisco

17h 08m1 stop New York John F Kennedy Intl

$741Iberia

Wed, Nov 11 - Mon, Nov 16

8:55 am - 6:50 amSFO San Francisco-LHR London Heathrow

13h 55m1 stop Dallas/Fort Worth

12:35 pm - 9:56 pmLHR London Heathrow-SFO San Francisco

17h 21m1 stop Chicago O'Hare Intl

$791Iberia

Thu, Oct 15 - Mon, Nov 9

4:30 pm - 10:20 amSFO San Francisco-LHR London Heathrow

33h 50m1 stop Lisbon Humberto Delgado

6:00 am - 2:25 pmLHR London Heathrow-SFO San Francisco

16h 25m1 stop Lisbon Humberto Delgado

$757TAP AIR PORTUGAL

Sun, Oct 18 - Mon, Nov 2

10:20 am - 4:50 pmLAX Los Angeles-LHR London Heathrow

22h 30m1 stop Casablanca Mohamed V

5:10 pm - 7:20 amLHR London Heathrow-LAX Los Angeles

22h 10m1 stop Casablanca Mohamed V

$762Royal Air Maroc

Sun, Oct 18 - Sat, Oct 31

10:20 am - 4:50 pmLAX Los Angeles-LHR London Heathrow

22h 30m1 stop Casablanca Mohamed V

5:10 pm - 8:20 amLHR London Heathrow-LAX Los Angeles

22h 10m1 stop Casablanca Mohamed V

$763Royal Air Maroc

Mon, Oct 19 - Sun, Nov 1

4:45 pm - 5:40 pmSFO San Francisco-LHR London Heathrow

16h 55m1 stop Kastrup Copenhagen

6:40 am - 3:50 pmLHR London Heathrow-SFO San Francisco

16h 10m1 stop Kastrup Copenhagen

$771Scandinavian Airlines

Mon, Oct 19 - Sat, Oct 31

4:45 pm - 4:00 pmSFO San Francisco-LHR London Heathrow

15h 15m1 stop Kastrup Copenhagen

6:40 am - 3:50 pmLHR London Heathrow-SFO San Francisco

16h 10m1 stop Kastrup Copenhagen

$771Scandinavian Airlines

Tue, Oct 20 - Wed, Nov 25

8:35 pm - 8:45 pmLAX Los Angeles-LHR London Heathrow

16h 10m1 stop New York John F Kennedy Intl

6:00 am - 9:39 pmLHR London Heathrow-LAX Los Angeles

23h 39m2 stops Zurich Montreal Pierre Elliott Trudeau Intl

$772Multiple Airlines

Tue, Oct 20 - Wed, Nov 18

4:20 pm - 5:45 pmSFO San Francisco-LHR London Heathrow

17h 25m1 stop Lisbon Humberto Delgado

6:00 am - 2:45 pmLHR London Heathrow-SFO San Francisco

16h 45m1 stop Lisbon Humberto Delgado

$772TAP AIR PORTUGAL

Tue, Oct 20 - Thu, Nov 5

4:30 pm - 11:05 amLAX Los Angeles-LHR London Heathrow

10h 35mnonstop

4:55 pm - 8:15 pmLHR London Heathrow-LAX Los Angeles

11h 20mnonstop

$780British Airways

Mon, Oct 19 - Wed, Nov 25

11:59 pm - 9:30 amLAX Los Angeles-LHR London Heathrow

25h 31m1 stop New York John F Kennedy Intl

6:00 am - 9:39 pmLHR London Heathrow-LAX Los Angeles

23h 39m2 stops Zurich Montreal Pierre Elliott Trudeau Intl

$783Multiple Airlines

Tue, Oct 20 - Sat, Oct 31

9:58 am - 7:50 amSFO San Francisco-LHR London Heathrow

13h 52m1 stop Philadelphia

11:45 am - 3:55 pmLHR London Heathrow-SFO San Francisco

11h 10mnonstop

$786British Airways

Low season	January
High season	July
Cheapest flight	$267

Best time to beat the crowds with an average 24% drop in price.

Most popular time to fly with an average 23% increase in price.

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-Sep 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 travelers 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 round-trip 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.

Hounslow

Hayes

Slough

Richmond

Wembley

Salisbury

Luton

Eastbourne

Ilford

Guildford

Northampton

Swindon

Kingston upon Thames

Bedford

Crawley

Watford

Harrow

Twickenham

Ipswich

St. Albans

More options for your flight to Heathrow

Add a hotel or car rental

Airports

Cabin class

Direct Flights

Origins

Other airports

Other destinations

Return flight

Complete your trip to Heathrow with a hotel stay or car rental

Car rentals in London

LHR

$267 Find Cheap Flights from California to London Heathrow Airport - Compare and Save

Cheap Flights from California to Heathrow

Cheap flights from California to Heathrow with top airlines, updated regularly. Compare round-trip, one-way, direct and last-minute deals.

Good to know

Low season

High season

Cheapest flight

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

FAQs for booking California to London Heathrow Airport flights

Traveling to a place near Heathrow?

More options for your flight to Heathrow

Complete your trip to Heathrow with a hotel stay or car rental

Information on your arrival and departure airports

Cabin class types available on flights to Heathrow

Find direct flights for Heathrow

Flights from domestic origins to California

Choose which airport to fly into in London

Flights to other popular destinations

Find deals for your return flight