How far in advance should I book tickets for a flight with United Airlines from Los Angeles to London Heathrow Airport?

Generally, when trying to get a below average price for your ticket, try to book around 7 days before departure. For the cheapest possible price, our data suggests booking 40 days before departure.

Is United Airlines the cheapest airline to fly with from Los Angeles to London Heathrow Airport?

With an average price of $893 return, United Airlines is not the cheapest airline to fly from Los Angeles to London Heathrow Airport with. Instead, for the lowest price, our data suggests flying with TAP AIR PORTUGAL, where a return flight costs $594 on average.

Does United Airlines fly direct to London Heathrow Airport from Los Angeles?

Yes, United Airlines does offer direct flights for the route, with around 7 flights per week.

What’s the cheapest day of the week to fly from Los Angeles to London Heathrow Airport with United Airlines?

On average, the cheapest day of the week to fly from Los Angeles to London Heathrow Airport with United Airlines is Monday, when prices are around $394. The most expensive day is generally Saturday, where the average price is around $430.

What’s the cheapest month to fly from Los Angeles to London Heathrow Airport with United Airlines?

The cheapest month for United Airlines flights to London Heathrow Airport from Los Angeles is generally February, where plane tickets cost $407 on average. If possible, try to avoid the most expensive months of October and December, where tickets cost $568 and $639 respectively.

$394 Cheap United Airlines Flights from Los Angeles to London Heathrow Airport

LAX - LHR

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Flight Deals

Cheap United Airlines Flight Deals from Los Angeles to London Heathrow Airport

Here are some of the best deals found on KAYAK recently from United Airlines for round-trip flights from Los Angeles to London Heathrow Airport 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 United Airlines flight deals from Los Angeles to London Heathrow Airport

Mon, Jan 19 - Sun, Feb 1

7:00 pm - 1:30 pm

LAX

LHR

10h 30mnonstop

6:30 am - 1:05 pm

LHR

LAX

14h 35m1 stop

$624United Airlines

Fri, Feb 13 - Sun, Mar 1

7:00 pm - 1:30 pm

LAX

LHR

10h 30mnonstop

6:30 am - 1:05 pm

LHR

LAX

14h 35m1 stop

$625United Airlines

Mon, Jan 19 - Sun, Feb 1

7:00 pm - 1:30 pm

LAX

LHR

10h 30mnonstop

6:30 am - 1:05 pm

LHR

LAX

14h 35m1 stop

$626United Airlines

Mon, Jan 19 - Sun, Feb 1

7:00 pm - 1:30 pm

LAX

LHR

10h 30mnonstop

6:30 am - 1:05 pm

LHR

LAX

14h 35m1 stop

$628United Airlines

Fri, Feb 13 - Sun, Mar 1

1:09 pm - 9:40 am

LAX

LHR

12h 31m1 stop

6:30 am - 1:05 pm

LHR

LAX

14h 35m1 stop

$629United Airlines

Mon, Apr 13 - Thu, Apr 23

2:10 pm - 1:20 pm

LAX

LHR

15h 10m1 stop

7:25 am - 3:15 pm

LHR

LAX

15h 50m1 stop

$630United Airlines

Sun, Mar 29 - Thu, Apr 9

8:30 am - 6:30 am

LAX

LHR

14h 00m1 stop

7:25 am - 3:15 pm

LHR

LAX

15h 50m1 stop

$633United Airlines

Sun, Apr 12 - Tue, Apr 21

4:10 pm - 12:20 pm

LAX

LHR

12h 10m1 stop

7:25 am - 3:15 pm

LHR

LAX

15h 50m1 stop

$634United Airlines

Tue, Apr 21 - Thu, Apr 30

7:35 am - 6:35 am

LAX

LHR

15h 00m1 stop

7:25 am - 3:15 pm

LHR

LAX

15h 50m1 stop

$637United Airlines

Fri, Mar 20 - Tue, Mar 24

8:30 am - 7:10 am

LAX

LHR

15h 40m1 stop

6:30 am - 5:33 pm

LHR

LAX

18h 03m2 stops

$638United Airlines

Useful Info

Low season	February
High season	June
Cheapest flight	$394
Average price round-trip	$1,251

Best time to beat the crowds with an average 7% drop in price.

Most popular time to fly with an average 24% increase in price.

Flight from Los Angeles to London Heathrow Airport

(price for this month)

When to Book Flights with United Airlines from Los Angeles to London Heathrow Airport

Average price per month

Flight prices as travel date approaches

How far in advance should I book tickets for a flight with United Airlines from Los Angeles to London Heathrow Airport?
Generally, when trying to get a below average price for your ticket, try to book around 7 days before departure. For the cheapest possible price, our data suggests booking 40 days before departure.
Is United Airlines the cheapest airline to fly with from Los Angeles to London Heathrow Airport?
With an average price of $893 return, United Airlines is not the cheapest airline to fly from Los Angeles to London Heathrow Airport with. Instead, for the lowest price, our data suggests flying with TAP AIR PORTUGAL, where a return flight costs $594 on average.
What is the cheapest United Airlines flight from Los Angeles to London Heathrow Airport?
In the last 3 days, the lowest price for a flight with United Airlines from Los Angeles to London Heathrow Airport was $505 for a return flight and $261 for a one-way flight.
Does United Airlines fly direct to London Heathrow Airport from Los Angeles?
Yes, United Airlines does offer direct flights for the route, with around 7 flights per week.
What’s the cheapest day of the week to fly from Los Angeles to London Heathrow Airport with United Airlines?
On average, the cheapest day of the week to fly from Los Angeles to London Heathrow Airport with United Airlines is Monday, when prices are around $394. The most expensive day is generally Saturday, where the average price is around $430.
What’s the cheapest month to fly from Los Angeles to London Heathrow Airport with United Airlines?
The cheapest month for United Airlines flights to London Heathrow Airport from Los Angeles is generally February, where plane tickets cost $407 on average. If possible, try to avoid the most expensive months of October and December, where tickets cost $568 and $639 respectively.

7.4

Good9,106 verified ratings

6.6Food

8.1Crew

7.1Entertainment

7.7Boarding

7.3Comfort

Pros +

Flight was quick and easy. (in 2447 reviews)
"Clean plane, organized crew." (in 2084 reviews)

Show reviews that mention

8.0 Very good

Verified traveler, Dec 2025

ORD

PHX

I liked the snacks and the flight attendants were friendly.

10.0 Wonderful

Betty, Dec 2025

IAH

SFO

Good

10.0 Wonderful

Betty, Dec 2025

UIO

IAH

Very Good!! Offered drinks and very polite

2.0 Poor

Verified traveler, Dec 2025

ATL

FRA

Gate agent at Frankfurt was terrible. She denied PRE boarding even as it was printed on the boarding pass. Refused to look at the boarding pass and literally shouting for no reason. Frankfurt airport has horrible and rude staff who avoids trying to answer any question at all. Overall, horrible experience.

10.0 Wonderful

Verified traveler, Dec 2025

YUL

IAD

Everything was incredible. thank you

8.0 Very good

Verified traveler, Dec 2025

LGA

ORD

They were professional and courteous.

2.0 Poor

Verified traveler, Dec 2025

MSY

EWR

The aircraft reliability cancelled the trip.

4.0 Mediocre

Claudia, Dec 2025

IAD

GUA

The Crew and the food was the worst I ever had in Business Class. First they told us there were no space for carry on. It was plenty of space over our 2 row seats, we had to ask to let us travel with it which was accepted. They were aware that we had to run for the connection due to the previous flight delay. Have us one hour waiting for more customers and not even offer a glass of water. Then started the service and they started to serve other passengers drinks in business and did not offer any drinks until they serve our pre ordered meal and I ask for something to drink. I had to wait until they finished to serve all passengers until Inget something. The crew was the worts I ever had for Business Class in my life.

6.0 Okay

Claudia, Dec 2025

AMS

IAD

The flight was delayed for 1:30 hours for maintenance issues. They should give more information about connecting flights. For a Business Cabin the Crew was mediocre.

8.0 Very good

Claudia, Dec 2025

ZRH

AMS

Very well

Everything you need to know for your flight from Los Angeles to London Heathrow Airport

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LAX - LHR

$394 Find Cheap United Airlines Flights from Los Angeles to London Heathrow Airport

Search hundreds of travel sites at once for deals on United Airlines flights from Los Angeles to London Heathrow Airport

Cheap United Airlines Flight Deals from Los Angeles to London Heathrow Airport

Recent round-trip United Airlines flight deals from Los Angeles to London Heathrow Airport

Recent one-way United Airlines flight deals from Los Angeles to London Heathrow Airport

Recent last minute United Airlines flight deals from Los Angeles to London Heathrow Airport

Recent direct United Airlines flight deals from Los Angeles to London Heathrow Airport

Good to know

When to Book Flights with United Airlines from Los Angeles to London Heathrow Airport

FAQs for flying to London Heathrow Airport with United Airlines

How far in advance should I book tickets for a flight with United Airlines from Los Angeles to London Heathrow Airport?

Generally, when trying to get a below average price for your ticket, try to book around 7 days before departure. For the cheapest possible price, our data suggests booking 40 days before departure.

Is United Airlines the cheapest airline to fly with from Los Angeles to London Heathrow Airport?

With an average price of $893 return, United Airlines is not the cheapest airline to fly from Los Angeles to London Heathrow Airport with. Instead, for the lowest price, our data suggests flying with TAP AIR PORTUGAL, where a return flight costs $594 on average.

What is the cheapest United Airlines flight from Los Angeles to London Heathrow Airport?

In the last 3 days, the lowest price for a flight with United Airlines from Los Angeles to London Heathrow Airport was $505 for a return flight and $261 for a one-way flight.

Does United Airlines fly direct to London Heathrow Airport from Los Angeles?

Yes, United Airlines does offer direct flights for the route, with around 7 flights per week.

What’s the cheapest day of the week to fly from Los Angeles to London Heathrow Airport with United Airlines?

On average, the cheapest day of the week to fly from Los Angeles to London Heathrow Airport with United Airlines is Monday, when prices are around $394. The most expensive day is generally Saturday, where the average price is around $430.

What’s the cheapest month to fly from Los Angeles to London Heathrow Airport with United Airlines?

The cheapest month for United Airlines flights to London Heathrow Airport from Los Angeles is generally February, where plane tickets cost $407 on average. If possible, try to avoid the most expensive months of October and December, where tickets cost $568 and $639 respectively.

United Airlines Customer Reviews

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Everything you need to know for your flight from Los Angeles to London Heathrow Airport

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Cabin classes available on flights to Los Angeles. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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

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The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.

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The most popular destinations for flights with United Airlines according to clicks from KAYAK users. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.