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.

$278 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.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from California to Heathrow

Sat, Dec 5 - Tue, Dec 15

4:35 pm - 10:40 pmSFO San Francisco-LHR London Heathrow

22h 05m1 stop Lisbon Humberto Delgado

6:30 pm - 2:45 pmLHR London Heathrow-SFO San Francisco

28h 15m1 stop Lisbon Humberto Delgado

$732TAP AIR PORTUGAL

Sat, Dec 5 - Tue, Dec 15

4:35 pm - 10:40 pmSFO San Francisco-LHR London Heathrow

22h 05m1 stop Lisbon Humberto Delgado

6:30 pm - 2:45 pmLHR London Heathrow-SFO San Francisco

28h 15m1 stop Lisbon Humberto Delgado

$735TAP AIR PORTUGAL

Sat, Mar 20 - Tue, Mar 23

8:52 pm - 7:10 amSFO San Francisco-LHR London Heathrow

27h 18m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

6:30 am - 1:35 pmLHR London Heathrow-SFO San Francisco

14h 05m1 stop Frankfurt am Main

$735Multiple Airlines

Tue, Feb 9 - Thu, Feb 11

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

$737United Airlines

Wed, Feb 17 - Fri, Feb 19

2:40 pm - 11:50 amSFO San Francisco-LHR London Heathrow

13h 10m1 stop Vancouver Intl

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

15h 30m1 stop Zurich

$737United Airlines

Sun, Nov 29 - Wed, Dec 2

4:45 pm - 5:00 pmSFO San Francisco-LHR London Heathrow

40h 15m2 stops Kastrup Copenhagen Stockholm Arlanda

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

16h 10m1 stop Kastrup Copenhagen

$737Scandinavian Airlines

Fri, Nov 13 - Mon, Nov 16

4:45 pm - 7:55 pmSFO San Francisco-LHR London Heathrow

43h 10m2 stops Kastrup Copenhagen Stockholm Arlanda

7:30 pm - 2:50 pmLHR London Heathrow-SFO San Francisco

27h 20m1 stop Kastrup Copenhagen

$737Scandinavian Airlines

Fri, Dec 4 - Mon, Dec 7

11:32 pm - 9:40 pmSFO San Francisco-LHR London Heathrow

14h 08m1 stop New York John F Kennedy Intl

6:00 am - 4:30 pmLHR London Heathrow-SFO San Francisco

18h 30m1 stop Zurich

$745Multiple Airlines

Sun, Mar 21 - Wed, Mar 24

5:15 pm - 11:50 amSFO San Francisco-LHR London Heathrow

35h 35m1 stop Vancouver Intl

11:05 am - 9:32 pmLHR London Heathrow-SFO San Francisco

41h 27m2 stops Brussels Bruxelles-National Montreal Pierre Elliott Trudeau Intl

$746Air Canada

Sun, Mar 21 - Tue, Mar 23

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

14h 05m1 stop Vancouver Intl

11:05 am - 9:32 pmLHR London Heathrow-SFO San Francisco

41h 27m2 stops Brussels Bruxelles-National Montreal Pierre Elliott Trudeau Intl

$746Air Canada

Recent last minute flight deals from California to Heathrow

Mon, Nov 2 - Mon, Nov 23

4:35 pm - 9:35 pmSFO San Francisco-LHR London Heathrow

21h 00m1 stop Lisbon Humberto Delgado

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

16h 25m1 stop Lisbon Humberto Delgado

$756TAP AIR PORTUGAL

Mon, Nov 2 - Sun, Nov 8

4:35 pm - 10:40 pmSFO San Francisco-LHR London Heathrow

22h 05m1 stop Lisbon Humberto Delgado

6:30 pm - 2:25 pmLHR London Heathrow-SFO San Francisco

27h 55m1 stop Lisbon Humberto Delgado

$756TAP AIR PORTUGAL

Sun, Nov 1 - Wed, Nov 18

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

16h 55m1 stop Kastrup Copenhagen

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

16h 10m1 stop Kastrup Copenhagen

$762Scandinavian Airlines

Sat, Oct 31 - Tue, Nov 10

9:35 pm - 3:10 pmSFO San Francisco-LHR London Heathrow

10h 35mnonstop

11:45 am - 2:55 pmLHR London Heathrow-SFO San Francisco

11h 10mnonstop

$763British Airways

Sun, Nov 1 - Wed, Nov 18

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

16h 55m1 stop Kastrup Copenhagen

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

16h 10m1 stop Kastrup Copenhagen

$767Scandinavian Airlines

Sat, Oct 31 - Fri, Nov 13

9:35 pm - 3:10 pmSFO San Francisco-LHR London Heathrow

10h 35mnonstop

11:45 am - 2:55 pmLHR London Heathrow-SFO San Francisco

11h 10mnonstop

$767British Airways

Mon, Nov 2 - Sun, Nov 8

7:30 pm - 4:20 pmLAX Los Angeles-LHR London Heathrow

36h 50m1 stop Istanbul

2:50 pm - 9:20 pmLHR London Heathrow-LAX Los Angeles

14h 30m1 stop Calgary

$799Multiple Airlines

Mon, Nov 2 - Tue, Nov 17

4:45 pm - 9:05 pmSFO San Francisco-LHR London Heathrow

20h 20m2 stops Kastrup Copenhagen Dublin

4:20 pm - 2:50 pmLHR London Heathrow-SFO San Francisco

30h 30m2 stops Dublin Kastrup Copenhagen

$809Multiple Airlines

Sun, Nov 1 - Fri, Nov 6

2:55 pm - 6:55 amLAX Los Angeles-LHR London Heathrow

32h 00m1 stop Boston Logan Intl

8:05 am - 12:47 amLHR London Heathrow-LAX Los Angeles

24h 42m1 stop New York John F Kennedy Intl

$840JetBlue

Wed, Oct 28 - Tue, Nov 10

7:30 am - 6:55 amSFO San Francisco-LHR London Heathrow

16h 25m1 stop Boston Logan Intl

7:25 am - 9:37 pmLHR London Heathrow-SFO San Francisco

22h 12m1 stop New York John F Kennedy Intl

$869JetBlue

Useful Info

Low season	January
High season	July
Cheapest flight	$278

Best time to beat the crowds with an average 23% drop in price.

Most popular time to fly with an average 21% 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

Richmond

Slough

Wembley

Salisbury

Luton

Eastbourne

Ilford

Northampton

Swindon

Kingston upon Thames

Guildford

Crawley

Bedford

Watford

Harrow

Twickenham

Ipswich

Moreton-in-Marsh

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$278 Find Cheap Flights from California to London Heathrow Airport - Compare and Save

Cheap Flights from California to Heathrow

Recent round-trip flight deals from California to Heathrow

Recent one-way flight deals from California to Heathrow

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Recent direct flight deals from California to Heathrow

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

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