How does KAYAK find such low prices on flights from California to London?

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. 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?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London 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?

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 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?

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 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>

$237 CHEAP FLIGHTS from California to London

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

...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

$569

Typical prices: $711-$788

British Airways

Tue 2/24Tue 3/3

ONT - LHR • 1 stop

Cheapest non-stop

$606

Typical prices: $634-$843

British Airways

Fri 3/13Thu 3/19

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 London!

Flight Deals

Cheap Flights from California to London

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from California to London 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 London

Tue, Feb 24 - Tue, Mar 3

6:00 am - 11:40 am

ONT

LHR

21h 40m1 stop

6:00 am - 10:49 pm

LHR

ONT

24h 49m2 stops

$569British Airways

Wed, Jan 28 - Tue, Feb 3

7:16 am - 6:50 am

ONT

LHR

15h 34m1 stop

8:50 pm - 10:48 pm

LHR

ONT

33h 58m2 stops

$578Iberia

Wed, Feb 25 - Sun, Mar 1

7:30 am - 10:30 am

ONT

LHR

19h 00m1 stop

12:20 pm - 10:37 pm

LHR

ONT

18h 17m1 stop

$596Virgin Atlantic

Sun, Jan 18 - Tue, Feb 3

12:41 pm - 11:40 am

ONT

LHR

14h 59m1 stop

12:30 pm - 9:05 pm

LHR

ONT

16h 35m1 stop

$599Delta

Sun, Jan 18 - Tue, Feb 3

12:41 pm - 11:40 am

ONT

LHR

14h 59m1 stop

12:30 pm - 9:05 pm

LHR

ONT

16h 35m1 stop

$601Delta

Fri, Mar 20 - Thu, Apr 2

8:10 pm - 9:50 am

SFO

LGW

30h 40m1 stop

10:35 am - 4:50 pm

LGW

SFO

38h 15m1 stop

$603TAP AIR PORTUGAL

Sun, Jan 18 - Sun, Jan 25

4:40 pm - 5:40 pm

SFO

LHR

17h 00m1 stop

5:00 pm - 2:35 pm

LHR

SFO

29h 35m1 stop

$603Scandinavian Airlines

Mon, Mar 16 - Wed, Mar 25

5:40 pm - 4:25 pm

SFO

LHR

15h 45m2 stops

7:30 pm - 3:35 pm

LHR

SFO

27h 05m1 stop

$605Scandinavian Airlines

Sat, Jan 31 - Sat, Feb 7

4:35 pm - 9:50 am

SFO

LGW

33h 15m1 stop

10:10 am - 2:35 pm

LGW

SFO

60h 25m2 stops

$607TAP AIR PORTUGAL

Sun, Feb 15 - Sun, Mar 1

1:55 pm - 5:20 pm

SFO

LCY

19h 25m1 stop

8:05 pm - 11:50 am

LCY

SFO

23h 45m1 stop

$630Virgin Atlantic

Useful Info

Low season	January
High season	June
Cheapest flight	$237

Best time to beat the crowds with an average 9% drop in price.

Most popular time to fly with an average 39% increase in price.

Flight from San Diego 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?
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.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from California to London?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London 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?
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 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?
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 from California up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Hounslow

Slough

Wembley

Hayes

Richmond

Luton

Ilford

Crawley

Watford

Guildford

Kingston upon Thames

Eastbourne

Colchester

St. Albans

Ipswich

Bedford

Twickenham

Harrow

Barnet

Hastings

Everything you need to know for your flight to London

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Cabin class types available on flights to California

First Class flights to Londonfrom $4,886

Business Class flights to Londonfrom $1,513

Prem Econ Class flights to Londonfrom $1,326

Economy Class flights to Londonfrom $480

$237 Find Cheap Flights from California to London

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

Everything you should know

Cheap Flights from California to London

Recent round-trip flight deals from California to London

Recent one-way flight deals from California to London

Recent last minute flight deals from California to London

Recent direct flight deals from California to London

Good to know

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

FAQs for booking flights from California to London

How does KAYAK find such low prices on flights from California to London?

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.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from California to London?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London 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?

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 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?

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 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 London?

Everything you need to know for your flight to London

Cabin class types available on flights to California

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

Find direct flights for London

Flights to other popular destinations

Flights from domestic origins to London

Choose which airport to fly into in London

Find deals for your return flight