Question 1

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

Accepted Answer

momondo collates all your flight options in one place and lets you filter them to find the perfect flight to London. momondo saves you time and could save you money on your trip.

Question 2

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

Accepted Answer

momondo does allow users to show only those flights to London which offer a flexible booking policy as well as other useful filters and features.

Question 3

How can momondo help me find flights to London?

Accepted Answer

Once you have performed a search for flights to London, momondo helps you find the right flight by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

Question 4

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

Accepted Answer

If you are not ready to book a flight to London now, use our insights above to find helpful tips or alternatively set up a price alert; this is where momondo will track prices on flights to London and let you know when they change.

Question 5

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

Accepted Answer

Most travelers find the cheapest round-trip airfare to London Heathrow Airport when booking during the month of October.

Question 6

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

Accepted Answer

From most locations, booking your flights to London Heathrow Airport around 51 days prior to your departure date finds the best deals.

Question 7

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

Accepted Answer

From most locations, the cheapest day to fly to London Heathrow Airport is Wednesday. Most users found that departing on a Saturday was most expensive.

Question 8

What is the cheapest time of day to fly to London Heathrow Airport?

Accepted Answer

In general, when looking for the cheapest flight to London Heathrow Airport, our data indicates that Morning flights are the most cost-effective. Evening flights tend to be the most expensive.

Question 9

Is there an alternative airport near London Heathrow Airport?

Accepted Answer

Those flying to London Heathrow Airport could potentially find better pricing at London City Airport (8 mi from London city center), London Gatwick Airport (24 mi from London city center), London Luton Airport (28 mi from London city center), London Stansted Airport (31 mi from London city center) or London Southend Airport (36 mi from London city center) depending on the month and departure airport.

Question 10

Is there a cheaper alternative to flying into London?

Accepted Answer

With an average price of $109 per person, London Southend Airport is the cheapest airport to fly into when planning your trip to London. This price can fluctuate based on where you are flying from. momondo’s Airport-to-Airport Pricing Tool can help users find the best prices.

Question 11

What is the absolute cheapest flight to London?

Accepted Answer

$18 is the cheapest deal found on momondo in the last two weeks for a flight to London. This flight is from Valencia and is 93% cheaper than most flights to London. To find the cheapest price to London from your area, use momondo’s Airport-to-Airport Pricing Tool.

Question 12

Which airlines fly to London Heathrow Airport?

Accepted Answer

There may be other airlines that fly to London Heathrow Airport from United States, but the most popular among our users are British Airways, United Airlines, American Airlines and Delta. These airlines should offer flights to London Heathrow Airport on a routine basis if you’re flying from one of the more popular airports in United States.

Question 13

Alaska Airlines Flights to London Heathrow Airport

Accepted Answer

There are 75 Alaska Airlines flights to London Heathrow Airport in a normal week. The most common departure point is New York John F Kennedy Intl and the best Alaska Airlines ticket price seen on momondo is $494 (last 72 hours, from New York John F Kennedy Intl, to London Heathrow Airport). Alaska Airlines has a score of 8.0 from 11,969 user reviews on momondo.

Question 14

Delta Flights to London Heathrow Airport

Accepted Answer

Delta flights to London Heathrow Airport can start from as low as $515 (round-trip, from Atlanta Hartsfield-Jackson, found in the last 72 hours). Over 39 flights that Delta operates to London Heathrow Airport in a normal week, prices can vary significantly. The most popular Delta flight to London Heathrow Airport is from New York John F Kennedy Intl. Delta has been rated 7.9/10 by momondo users, in 8,240 reviews.

Question 15

What airlines fly to London Heathrow Airport?

Accepted Answer

Of the 23 airlines that fly to London Heathrow Airport, British Airways, United Airlines and American Airlines happen to be the most favored based on our user data. British Airways is the most popular among the three airlines, with 48% of users choosing them for their travels to London Heathrow Airport.

Question 16

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

Accepted Answer

Prices for flights to London Heathrow Airport refresh daily.

Question 17

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

Accepted Answer

As of February 2026, there are 76 operators available to choose from for flights to London Heathrow Airport.

Question 18

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

Accepted Answer

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 to London Heathrow Airport.

Question 19

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

Accepted Answer

The required travel and health documents for your London Heathrow Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London Heathrow Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Question 20

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

Accepted Answer

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the morning. momondo users have found flights departing from United States to London Heathrow Airport in the morning for as low as $608. 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 evening are often more expensive with an average ticket price of $686.

Question 21

What is the cheapest United States to London Heathrow flight route?

Accepted Answer

Fly from Miami to London Heathrow for the best United States - London Heathrow flight prices

Question 22

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

Accepted Answer

KLM, JetBlue, and United Airlines are the most popular carriers operating from United States to London Heathrow

Question 23

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

Accepted Answer

On average, it takes 10h 20m to fly from United States to London Heathrow Airport if you fly out of Los Angeles (the most popular airport in United States) and into London Heathrow (the most popular airport in London Heathrow Airport). If you’re flying out of Miami and into London Heathrow, then the flight time is around 8h 40m.

Question 24

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

Accepted Answer

As of February 2026, there are 333 flights per day flying from United States to London Heathrow Airport. The most common time of day flights depart is 6:00PM, with 70% of flights taking off in the evening.

Question 25

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

Accepted Answer

You are more likely to see cheaper flights to London Heathrow Airport from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $601 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 United States for as low as $578 on momondo.

Question 26

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

Accepted Answer

2,334 flights are operational weekly from United States to London Heathrow Airport as of February 2026. The most popular departure day for this route is Fri, with 16% of flights per week taking off on this day.

Question 27

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

Accepted Answer

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

Question 28

What airlines fly to London Heathrow Airport?

Accepted Answer

British Airways, United Airlines and Delta are the top three most popular airlines that fly to London Heathrow Airport from United States according to our data. British Airways is the first choice among our users, with 51% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 23 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Question 29

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

Accepted Answer

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 $638. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $700.

Question 30

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

Accepted Answer

The month of October is, on average, the cheapest month to fly to London Heathrow Airport from United States, with most prices found around $535. If you’re not able to fly to London Heathrow Airport in October, then January is your next best option. Flight prices from United States to London Heathrow Airport during January average around $539.

CHEAPEST MONTH TO FLY TO LONDON HEATHROW AIRPORT FROM LOS ANGELES	September	15% cheaper	Flying from Los Angeles to London Heathrow Airport costs on average just $654 in September
MOST EXPENSIVE MONTH TO FLY TO LONDON HEATHROW AIRPORT FROM LOS ANGELES	December	34% more expensive	It costs about $1,027 for flights to London Heathrow Airport from Los Angeles in December
MOST POPULAR MONTH TO FLY TO LONDON HEATHROW AIRPORT FROM LOS ANGELES	June	296% more users visited	More momondo users searched in flights to London Heathrow Airport from Los Angeles in June than any other month

Best One-Way Price	$188
Best Round-Trip Price	$462
Fastest flight time	6h 50m
Popular in	December

$188 Cheap flights to London Heathrow Airport

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to London Heathrow Airport departing on 3/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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

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

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

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

What is the cheapest United States to London Heathrow flight route?

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

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

What airlines fly to London Heathrow Airport?

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

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

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

Cheapest flights to London Heathrow

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Fly your favorite airline to London Heathrow Airport

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Cabin classes currently available on flights to London Heathrow Airport

List of cabin classes available on flights landing in London Heathrow Airport. Availability may vary depending on flight origin and airline.

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