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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$219 CHEAP FLIGHTS from California to London Heathrow (LHR)

LHR

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

...and more

Travelers love KAYAK

41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$566

Overall average: $883

British Airways

Wed 2/18Thu 2/26

SMF - LHR • 1 stop

Cheapest non-stop

$598

Typical prices: $700-$998

Finnair

Tue 5/12Thu 5/21

SFO - LHR • Non-stop

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Heathrow!

Flight Deals

Cheap Flights from California to Heathrow

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip 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.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from California to Heathrow

Wed, Feb 18 - Thu, Feb 26

6:00 am - 12:15 pm

SMF

LHR

22h 15m

1 stop

7:30 am - 10:41 pm

LHR

SMF

23h 11m

2 stops

$566British Airways

Wed, Feb 25 - Mon, Mar 9

11:31 am - 11:40 am

SMF

LHR

16h 09m

1 stop

4:30 pm - 11:25 pm

LHR

SMF

37h 55m

2 stops

$577British Airways

Sun, Feb 15 - Tue, Mar 10

6:00 am - 6:50 am

SMF

LHR

16h 50m

1 stop

8:50 pm - 7:50 pm

LHR

SMF

30h 00m

2 stops

$578Iberia

Tue, Feb 17 - Tue, Feb 24

6:00 am - 6:50 am

SJC

LHR

16h 50m

1 stop

8:50 pm - 9:30 pm

LHR

SJC

32h 40m

2 stops

$578Iberia

Sun, Feb 8 - Fri, Feb 27

7:16 am - 10:00 am

ONT

LHR

18h 44m

1 stop

6:05 am - 10:29 pm

LHR

ONT

24h 24m

2 stops

$578Iberia

Tue, Apr 21 - Thu, May 14

1:00 pm - 1:20 pm

SMF

LHR

16h 20m

1 stop

10:50 am - 11:00 pm

LHR

SMF

20h 10m

2 stops

$579Lufthansa

Mon, Feb 23 - Mon, Mar 9

6:00 am - 11:40 am

SJC

LHR

21h 40m

1 stop

4:15 pm - 9:21 pm

LHR

SJC

36h 06m

2 stops

$579Finnair

Tue, Apr 21 - Tue, May 5

1:00 pm - 1:20 pm

SMF

LHR

16h 20m

1 stop

7:25 am - 5:48 pm

LHR

SMF

18h 23m

2 stops

$580Lufthansa

Fri, Feb 6 - Fri, Mar 6

12:30 pm - 7:10 am

SMF

LHR

58h 40m

2 stops

6:35 am - 11:52 am

LHR

SMF

37h 17m

2 stops

$585Multiple Airlines

Sat, Feb 14 - Tue, Feb 24

3:55 pm - 11:50 am

SJC

LHR

35h 55m

2 stops

3:00 pm - 1:41 pm

LHR

SJC

30h 41m

2 stops

$585Multiple Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$219

Best time to beat the crowds with an average 10% drop in price.

Most popular time to fly with an average 18% increase in price.

Flight from Sacramento to London Heathrow Airport

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

Sep 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.

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

Slough

Hayes

Wembley

Richmond

Luton

Salisbury

Ilford

Crawley

Watford

Guildford

Eastbourne

Kingston upon Thames

Colchester

Swindon

St. Albans

Northampton

Ipswich

Twickenham

Bedford

Everything you need to know for your flight to Heathrow

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Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

London Heathrow Airport (LHR)

LHR

$219 Find Cheap Flights from California to London Heathrow Airport

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

Everything you should know

Cheap Flights from California to Heathrow

Recent round-trip flight deals from California to Heathrow

Recent one-way flight deals from California to Heathrow

Recent last minute flight deals from California to Heathrow

Recent direct flight deals from California to Heathrow

Good to know

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

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 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.

Traveling to a place near Heathrow?

Everything you need to know for your flight to Heathrow

Information on your arrival and departure airports

Cabin class types available on flights to Heathrow

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

Find direct flights for Heathrow

Flights to other popular destinations

Flights from domestic origins to California

Choose which airport to fly into in London

Find deals for your return flight