How long does it take to fly to London Heathrow Airport?

On average, it takes 10h 10m to fly from California to London Heathrow Airport if you fly out of San Francisco (the most popular airport in California) and into London Heathrow Airport (the most popular airport in London Heathrow Airport). If you’re flying out of Los Angeles and into London Heathrow Airport, then the flight time is around 10h 25m.

What airlines fly to London Heathrow Airport?

British Airways, United Airlines and Iberia are the top three most popular airlines that fly to London Heathrow Airport from California according to our data. British Airways is the first choice among our users, with 40% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 20 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from California to London Heathrow?

TAP AIR PORTUGAL and WestJet are the most popular carriers operating from California to London Heathrow

How many flights depart from California to London Heathrow Airport on average per day?

As of August 2025, 112 flights take off from California and land in London Heathrow Airport each day. The most common flight departure time for this route is 4:00PM, with 56% of daily flights taking off in the afternoon.

How many flights depart from California to London Heathrow Airport on average per week?

As of August 2025, there are 788 flights per week flying from California to London Heathrow Airport. The most common day of the week flights depart is Fri, with 15% of flights taking off on this day.

How many operators does momondo search for flights from California to London Heathrow Airport?

There are 20 operators available for flights from California to London Heathrow Airport as of August 2025.

How old do you have to be to fly from California to London Heathrow Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to London Heathrow Airport.

What documentation or ID do you need to fly to London Heathrow Airport?

The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$168 Cheap Flights from California to London Heathrow Airport in 2025

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from California to London

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

6:45 pm - 10:20 amSFO-LHR

31h 35m2 stops

1:45 pm - 2:35 pmLHR-SFO

32h 50m1 stop

$417TAP AIR PORTUGAL

Find Deal

Tue, Sep 9 - Tue, Sep 16

6:45 pm - 10:20 amSFO-LHR

31h 35m2 stops

1:45 pm - 2:35 pmLHR-SFO

32h 50m1 stop

$418TAP AIR PORTUGAL

Find Deal

Tue, Sep 16 - Tue, Sep 23

8:15 pm - 7:25 pmLAX-LHR

15h 10m1 stop

8:50 am - 6:25 pmLHR-LAX

17h 35m1 stop

$426Aer Lingus

Find Deal

Wed, Sep 3 - Wed, Sep 17

1:25 pm - 8:00 amLAX-LHR

10h 35mnonstop

10:10 am - 1:25 pmLHR-LAX

11h 15mnonstop

$457British Airways

Find Deal

Wed, Sep 3 - Wed, Sep 17

8:30 am - 6:30 amSFO-LHR

14h 00m1 stop

10:15 am - 5:41 pmLHR-SFO

15h 26m1 stop

$461Air Canada

Find Deal

Wed, Sep 17 - Thu, Oct 2

8:15 pm - 8:20 pmLAX-LHR

16h 05m1 stop

8:50 am - 6:25 pmLHR-LAX

17h 35m1 stop

$462Aer Lingus

Find Deal

Mon, Sep 8 - Wed, Sep 24

8:05 am - 9:35 amLAX-LHR

17h 30m1 stop

6:00 am - 4:30 pmLHR-LAX

18h 30m1 stop

$467

Find Deal

Mon, Sep 8 - Wed, Sep 24

7:30 pm - 9:45 pmSFO-LHR

18h 15m1 stop

9:30 am - 11:11 amLHR-SFO

33h 41m1 stop

$468

Find Deal

Fri, Sep 26 - Sun, Sep 28

6:00 am - 9:35 amLAX-LHR

19h 35m2 stops

8:30 am - 8:53 pmLHR-LAX

20h 23m1 stop

$493Air Canada

Find Deal

Wed, Sep 10 - Fri, Sep 26

9:30 pm - 4:05 pmLAX-LHR

10h 35mnonstop

4:55 pm - 9:15 pmLHR-LAX

11h 20mnonstop

$494British Airways

Find Deal

Wed, Oct 8 - Wed, Oct 29

TAP AIR PORTUGAL flights from California to London Heathrow Airport

Our best TAP AIR PORTUGAL deals on California to London Heathrow Airport flight tickets

TAP AIR PORTUGAL

Sep 9

SFO6:45 pmSan Francisco

31h 35m

2 stops

LHR10:20 amLondon Heathrow

Sep 16

LHR1:45 pmLondon Heathrow

32h 50m

1 stop

SFO2:35 pmSan Francisco

$417

Find similar

TAP AIR PORTUGAL

Sep 16

SFO6:45 pmSan Francisco

31h 35m

2 stops

LHR10:20 amLondon Heathrow

Sep 23

LHR1:45 pmLondon Heathrow

32h 50m

1 stop

SFO2:35 pmSan Francisco

$418

Find similar

TAP AIR PORTUGAL

Sep 16

SFO6:45 pmSan Francisco

34h 00m

2 stops

LHR12:45 pmLondon Heathrow

Sep 23

LHR6:45 pmLondon Heathrow

27h 50m

1 stop

SFO2:35 pmSan Francisco

$420

Find similar

Finnair flights from California to London Heathrow Airport

Our best Finnair deals on California to London Heathrow Airport flight tickets

Finnair

Aug 10

LAX1:30 pmLos Angeles

10h 30m

LHR8:00 amLondon Heathrow

Aug 26

LHR7:30 amLondon Heathrow

17h 35m

1 stop

LAX5:05 pmLos Angeles

$481

Find similar

Finnair

Aug 10

LAX1:30 pmLos Angeles

10h 30m

LHR8:00 amLondon Heathrow

Aug 26

LHR10:20 amLondon Heathrow

14h 45m

1 stop

LAX5:05 pmLos Angeles

$482

Find similar

Finnair

Sep 9

LAX9:35 pmLos Angeles

10h 30m

LHR4:05 pmLondon Heathrow

Sep 18

LHR9:30 amLondon Heathrow

15h 35m

1 stop

LAX5:05 pmLos Angeles

$484

Find similar

momondo Fare Finder

Use the filters below to find and compare flights from California to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 9/9

6:45 pm-10:20 am

2 stops31h 35m

London Heathrow

Tue 9/16

1:45 pm-2:35 pm

1 stop32h 50m

$417

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Tue 9/16

6:45 pm-10:20 am

2 stops31h 35m

London Heathrow

Tue 9/23

1:45 pm-2:35 pm

1 stop32h 50m

$418

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 9/3

8:15 pm-7:25 pm

1 stop15h 10m

London Heathrow

Wed 9/17

8:50 am-6:25 pm

1 stop17h 35m

$426

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 9/3

1:25 pm-8:00 am

Nonstop10h 35m

London Heathrow

Wed 9/17

10:10 am-1:25 pm

Nonstop11h 15m

$457

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Wed 9/17

8:30 am-6:30 am

1 stop14h 00m

London Heathrow

Thu 10/2

10:15 am-5:41 pm

1 stop15h 26m

$461

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Mon 9/8

8:15 pm-8:20 pm

1 stop16h 05m

London Heathrow

Wed 9/24

8:50 am-6:25 pm

1 stop17h 35m

$462

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Mon 9/8

8:05 am-9:35 am

1 stop17h 30m

London Heathrow

Wed 9/24

6:00 am-4:30 pm

1 stop18h 30m

$467

San FranciscoLondon

SFO - LHR

SFOLHR

San Francisco

Fri 9/26

7:30 pm-9:45 pm

1 stop18h 15m

London Heathrow

Sun 9/28

9:30 am-11:11 am

1 stop33h 41m

$468

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 9/10

6:00 am-9:35 am

2 stops19h 35m

London Heathrow

Fri 9/26

8:30 am-8:53 pm

1 stop20h 23m

$493

Los AngelesLondon

LAX - LHR

LAXLHR

Los Angeles

Wed 10/8

9:30 pm-4:05 pm

Nonstop10h 35m

London Heathrow

Wed 10/29

4:55 pm-9:15 pm

Nonstop11h 20m

$494

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from California to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to London Heathrow Airport?

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from California, with most prices found around $645. If you’re not able to fly to London Heathrow Airport in October, then September is your next best option. Flight prices from California to London Heathrow Airport during September average around $668.

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $779. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $904.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from California to London Heathrow Airport at noon for as low as $787. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $849.

What is the cheapest California to London Heathrow flight route?

Fly from San Francisco to London Heathrow for the best California - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from California when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $779 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from California for as low as $706 on momondo.

What cabin class options are available on California to London Heathrow flights?

There are 4 cabin classes available to choose from on California to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on California to London Heathrow Airport flights?

You could potentially save up to 35% on your flight if you consider stops on a California to London Heathrow Airport flight.

Cheap California to London Heathrow Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from California to London Heathrow Airport

Best Price Found	$168
Fastest flight time	9h 55m
Direct flights	Every day

The best one-way flight to London Heathrow Airport from California in the past 72 hours is $168. The best round-trip flight deal from California to London Heathrow Airport found on momondo in the last 72 hours is $417.

The fastest flight from California to London Heathrow Airport takes 9h 55m

Direct flights go from California to London Heathrow Airport every day.

Search flight deals

When did momondo last update prices for flights from California to London Heathrow Airport?
Prices for flights from California to London Heathrow Airport refresh daily.
How many operators does momondo search for flights from California to London Heathrow Airport?
There are 20 operators available for flights from California to London Heathrow Airport as of August 2025.
How old do you have to be to fly from California to London Heathrow Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The travel and health documents required for your trip to London Heathrow Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Heathrow Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from California to London Heathrow Airport?
Based on momondo bookings for flights between California and London Heathrow Airport, the leading plane model is Boeing 787-9 Dreamliner, making up 23.29% of the total bookings. Other popular models include Airbus A380-800 with 13.68%, Boeing 777 with 13.51%, and Boeing 777-300ER with 12.90%.

Best airlines flying from California to London Heathrow Airport

Compare and see reviews for airlines that fly from California to London Heathrow Airport with momondo

Airline	Rating	Free Cancellation	Price
JetBlue	PriceFrom $195	Free Cancellation	Rating 7.2 2,915 reviews	Search JetBlue flights
WestJet	PriceFrom $272	Free Cancellation	Rating 7.2 2,980 reviews	Search WestJet flights
SWISS	PriceFrom $336	Free Cancellation	Rating 7.5 1,686 reviews	Search SWISS flights
Scandinavian Airlines	PriceFrom $336	Free Cancellation	Rating 7.3 1,457 reviews	Search Scandinavian Airlines flights
TAP AIR PORTUGAL	PriceFrom $375	Free Cancellation	Rating 7.1 1,936 reviews	Search TAP AIR PORTUGAL flights
Lufthansa	PriceFrom $427	Free Cancellation	Rating 6.8 7,276 reviews	Search Lufthansa flights
Aer Lingus	PriceFrom $476	Free Cancellation	Rating 7.1 1,193 reviews	Search Aer Lingus flights
Norse Atlantic UK	PriceFrom $477	Free Cancellation	Rating 7.2 47 reviews	Search Norse Atlantic UK flights
Finnair	PriceFrom $540	Free Cancellation	Rating 7.6 1,317 reviews	Search Finnair flights
British Airways	PriceFrom $553	Free Cancellation	Rating 6.6 7,224 reviews	Search British Airways flights

Gatwick

Hounslow

Dover

Slough

Luton

Dartford

Guildford

Milton Keynes

Stansted

Hayes

Crawley

Croydon

Chelmsford

Salisbury

Ilford

Brentwood

Colchester

Stratford-upon-Avon

Folkestone

Swindon

Why use momondo?

Why should I use momondo to find a flight deal from California to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from California to London for you.

Can I find flights from California to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from California with this policy.

How can momondo help me find flights from California to London?

Once all potential California to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from California to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from California and alert you when they change.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Thu 8/7

Thu 8/14

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities in the United Kingdom

Flights to London Gatwick Airportfrom $296

Flights to London City Airportfrom $471

Flights to London Stansted Airportfrom $417

Flights to London Luton Airportfrom $426

Flights to London Southend Airportfrom $518

Flights to Glasgow Intl Airportfrom $417

Flights to Belfast Intl Airportfrom $435

Flights to Belfast City Airportfrom $484

Cheap flights from California to London from $168

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to London departing on 10/19. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from California to London

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

TAP AIR PORTUGAL flights from California to London Heathrow Airport

Our best TAP AIR PORTUGAL deals on California to London Heathrow Airport flight tickets

Finnair flights from California to London Heathrow Airport

Our best Finnair deals on California to London Heathrow Airport flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from California to London Heathrow Airport that are best for you.

See travel insights to London from

How to get the cheapest flight ticket from California to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

What is the cheapest day to depart on your flight to London Heathrow Airport?

Our data shows that Wednesday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $779. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $904.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

What is the cheapest California to London Heathrow flight route?

Fly from San Francisco to London Heathrow for the best California - London Heathrow flight prices

How far in advance should I book a flight to London Heathrow Airport?

What cabin class options are available on California to London Heathrow flights?

There are 4 cabin classes available to choose from on California to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on California to London Heathrow Airport flights?

You could potentially save up to 35% on your flight if you consider stops on a California to London Heathrow Airport flight.

What is the cheapest airline that flies from California to London Heathrow?

TAP AIR PORTUGAL and WestJet are the most popular carriers operating from California to London Heathrow

What airlines fly to London Heathrow Airport?

How many flights depart from California to London Heathrow Airport on average per day?

As of August 2025, 112 flights take off from California and land in London Heathrow Airport each day. The most common flight departure time for this route is 4:00PM, with 56% of daily flights taking off in the afternoon.

How many flights depart from California to London Heathrow Airport on average per week?

As of August 2025, there are 788 flights per week flying from California to London Heathrow Airport. The most common day of the week flights depart is Fri, with 15% of flights taking off on this day.

How long does it take to fly to London Heathrow Airport?

Cheap California to London Heathrow Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from California to London Heathrow Airport

Best Price Found

Fastest flight time

Direct flights

When did momondo last update prices for flights from California to London Heathrow Airport?

How many operators does momondo search for flights from California to London Heathrow Airport?

How old do you have to be to fly from California to London Heathrow Airport?

What documentation or ID do you need to fly to London Heathrow Airport?

What is the most popular plane model from California to London Heathrow Airport?

Best airlines flying from California to London Heathrow Airport

Compare and see reviews for airlines that fly from California to London Heathrow Airport with momondo

Traveling to a place near London?

Why use momondo?

Why should I use momondo to find a flight deal from California to London?

Can I find flights from California to London with flexible booking policies on momondo?

How can momondo help me find flights from California to London?

I’m not ready to book a flight from California to London right now. Can momondo alert me if prices change?

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo