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>

$235 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

Save 23% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

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

Cheapest round-trip

$579

Typical prices: $677-$988

Iberia

Tue 1/27Thu 2/5

ONT - LHR • 1 stop

Cheapest non-stop

$605

Typical prices: $637-$729

British Airways

Wed 2/18Sat 2/28

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, Jan 27 - Thu, Feb 5

10:58 am - 10:00 am

ONT

LHR

15h 02m

1 stop

8:50 pm - 10:48 pm

LHR

ONT

33h 58m

2 stops

$579Iberia

Wed, Feb 25 - Wed, Mar 4

7:00 am - 11:40 am

ONT

LHR

20h 40m

1 stop

7:35 am - 10:49 pm

LHR

ONT

23h 14m

2 stops

$581Iberia

Wed, Apr 15 - Tue, May 5

4:52 pm - 3:05 pm

ONT

LHR

14h 13m

1 stop

6:10 am - 10:35 pm

LHR

ONT

24h 25m

2 stops

$584British Airways

Tue, Feb 10 - Tue, Feb 17

4:45 pm - 1:15 pm

ONT

LHR

12h 30m

1 stop

11:45 am - 7:45 pm

LHR

ONT

16h 00m

1 stop

$589British Airways

Thu, Feb 26 - Thu, Mar 5

7:30 am - 10:30 am

ONT

LHR

19h 00m

1 stop

12:20 pm - 10:37 pm

LHR

ONT

18h 17m

1 stop

$594Virgin Atlantic

Sun, Jan 25 - Wed, Feb 4

12:41 pm - 11:40 am

ONT

LHR

14h 59m

1 stop

12:30 pm - 9:05 pm

LHR

ONT

16h 35m

1 stop

$598Delta

Tue, Mar 3 - Tue, Mar 10

7:25 pm - 5:50 pm

SFO

LGW

14h 25m

1 stop

6:40 pm - 5:30 pm

LGW

SFO

29h 50m

1 stop

$605SWISS

Wed, Apr 15 - Thu, Apr 23

7:35 pm - 5:30 pm

SFO

LCY

13h 55m

1 stop

9:15 am - 4:15 pm

LCY

SFO

15h 00m

1 stop

$606SWISS

Tue, Apr 28 - Fri, May 8

5:55 pm - 12:15 pm

SFO

LHR

10h 20mnonstop

6:30 am - 11:45 am

LHR

SFO

13h 15m

1 stop

$607Delta

Wed, Feb 4 - Wed, Feb 11

1:55 pm - 4:35 pm

SFO

LCY

18h 40m

1 stop

9:20 am - 11:50 am

LCY

SFO

34h 30m

1 stop

$612Virgin Atlantic

Useful Info

Low season	January
High season	June
Cheapest flight	$235

Best time to beat the crowds with an average 8% 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

Hayes

Wembley

Richmond

Luton

Ilford

Crawley

Watford

Guildford

Eastbourne

Kingston upon Thames

Colchester

St. Albans

Ipswich

Twickenham

Bedford

Barnet

Harrow

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 $1,049

Prem Econ Class flights to Londonfrom $1,329

Economy Class flights to Londonfrom $506

$235 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