Which airlines fly to London?

For flights from United States to London, most momondo users will book with popular airlines such as British Airways, United Airlines, Delta and American Airlines. Depending on what airport you fly from, you may have other airlines to choose from.

Alaska Airlines Flights to London

The most popular airline for flights to London on momondo is Alaska Airlines, which operates 82 flights in this direction every week. Most depart out of New York John F Kennedy Intl, with the best deal for Alaska Airlines flights to London being $524 (round-trip, New York John F Kennedy Intl to London, momondo searches within the last 72 hours). In 11,036 Alaska Airlines reviews, it is rated 8.0 by momondo users.

KLM Flights to London

KLM (7.7/10, 1,396 reviews) is also a popular choice for flights to London, with deals from as low as $366 from Atlanta Hartsfield-Jackson, round-trip. With 90 KLM flights to London on average each week, prices can vary significantly by origin and availability.

How long does it take to fly to London?

If you’re flying from a popular airport in United States, such as Los Angeles or Miami, and flying into London, then you can expect flight times to average 10h 20m and 8h 30m, respectively.

$137 Cheap Flights to London in 2025/26

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Find the cheapest flights from the United States to London

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Cheap round-trip flights

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9:00 pm - 5:50 pmJFK-LGW

15h 50m1 stop

6:40 pm - 1:05 pmLGW-JFK

23h 25m1 stop

$454SWISS

Find Deal

Sat, Nov 29 - Sat, Dec 6

3:20 pm - 7:10 amLGA-LHR

10h 50m1 stop

1:25 pm - 7:03 pmLHR-LGA

10h 38m1 stop

$455Air Canada

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Wed, Nov 19 - Wed, Nov 26

10:15 am - 10:10 pmJFK-LHR

6h 55mnonstop

11:25 am - 7:15 pmLHR-JFK

12h 50m1 stop

$496Iberia

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Wed, Nov 5 - Wed, Nov 12

5:30 am - 7:10 amBOS-LHR

20h 40m1 stop

12:05 pm - 8:00 pmLHR-BOS

12h 55m1 stop

$498United Airlines

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Wed, Nov 19 - Thu, Nov 27

10:05 am - 7:10 amJFK-LHR

16h 05m1 stop

9:00 am - 4:40 pmLHR-JFK

12h 40m1 stop

$498United Airlines

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Wed, Nov 5 - Wed, Nov 12

8:00 pm - 7:50 amBOS-LHR

6h 50mnonstop

6:20 am - 1:40 pmLHR-BOS

12h 20m1 stop

$509Delta

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Wed, Nov 19 - Sun, Nov 23

8:10 pm - 7:50 amBOS-LHR

6h 40mnonstop

1:30 pm - 5:05 pmLHR-BOS

7h 35mnonstop

$511Iberia

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Wed, Oct 22 - Wed, Oct 29

8:59 pm - 11:25 amBOS-LHR

9h 26m1 stop

6:20 am - 2:40 pmLHR-BOS

12h 20m1 stop

$513Delta

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Fri, Oct 17 - Thu, Oct 30

8:10 pm - 7:50 amBOS-LHR

6h 40mnonstop

5:05 pm - 8:45 pmLHR-BOS

7h 40mnonstop

$515British Airways

Find Deal

Thu, Oct 23 - Tue, Oct 28

7:30 am - 7:00 pmBOS-LHR

6h 30mnonstop

5:05 pm - 7:45 pmLHR-BOS

7h 40mnonstop

$516British Airways

Find Deal

Wed, Nov 19 - Mon, Nov 24

Fly from

Route

Depart

Return

Price

New YorkLondon

JFK - LGW

JFKLGW

New York John F Kennedy Intl

Sat 11/29

9:00 pm-5:50 pm

1 stop15h 50m

London Gatwick

Sat 12/6

6:40 pm-1:05 pm

1 stop23h 25m

$454

New YorkLondon

LGA - LHR

LGALHR

New York LaGuardia

Wed 11/19

3:20 pm-7:10 am

1 stop10h 50m

London Heathrow

Wed 11/26

1:25 pm-7:03 pm

1 stop10h 38m

$455

New YorkLondon

JFK - LHR

JFKLHR

New York John F Kennedy Intl

Wed 11/5

10:15 am-10:10 pm

Nonstop6h 55m

London Heathrow

Wed 11/12

11:25 am-7:15 pm

1 stop12h 50m

$496

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 11/19

5:30 am-7:10 am

1 stop20h 40m

London Heathrow

Thu 11/27

12:05 pm-8:00 pm

1 stop12h 55m

$498

New YorkLondon

JFK - LHR

JFKLHR

New York John F Kennedy Intl

Wed 11/5

10:05 am-7:10 am

1 stop16h 05m

London Heathrow

Wed 11/12

9:00 am-4:40 pm

1 stop12h 40m

$498

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 11/19

8:00 pm-7:50 am

Nonstop6h 50m

London Heathrow

Sun 11/23

6:20 am-1:40 pm

1 stop12h 20m

$509

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 10/22

8:10 pm-7:50 am

Nonstop6h 40m

London Heathrow

Wed 10/29

1:30 pm-5:05 pm

Nonstop7h 35m

$511

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Fri 10/17

8:59 pm-11:25 am

1 stop9h 26m

London Heathrow

Thu 10/30

6:20 am-2:40 pm

1 stop12h 20m

$513

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Thu 10/23

8:10 pm-7:50 am

Nonstop6h 40m

London Heathrow

Tue 10/28

5:05 pm-8:45 pm

Nonstop7h 40m

$515

BostonLondon

BOS - LHR

BOSLHR

Boston Logan Intl

Wed 11/19

7:30 am-7:00 pm

Nonstop6h 30m

London Heathrow

Mon 11/24

5:05 pm-7:45 pm

Nonstop7h 40m

$516

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

London flights insights and trends

Explore insights for your London flight to craft the best travel plan

Prices

Other information

What is the cheapest month to fly to London?

The cheapest month to fly to London from United States is in January. Flight prices, which tend to average around $414, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from United States averaging around $506.

What is the absolute cheapest flight to London?

The best deal found on momondo in the last two weeks was a flight to London from Bratislava for $17. This is 94% cheaper than most flight deals to London. To find the cheapest price to London from your area, use momondo’s Airport-to-Airport Pricing Tool.

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

The cheapest day to depart from United States to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $628. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $672. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

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

Flying to London from United States at noon is the least expensive time of day to depart. momondo users have found prices as low as $500 when looking at flights departing at noon. Flights to London are more costly in the evening, with an average ticket price of $672. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to London from United States when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around $612 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from United States for as low as $560 on momondo.

Cheapest flights to London

Find the cheapest flights to London from your nearest city or airport

Find flights from Los Angeles to London Heathrow Airport

CHEAPEST MONTH TO FLY TO LONDON FROM LOS ANGELES	September	17% cheaper	Flying from Los Angeles to London costs on average just $597 in September
MOST EXPENSIVE MONTH TO FLY TO LONDON FROM LOS ANGELES	December	41% more expensive	It costs about $1,014 for flights to London from Los Angeles in December
MOST POPULAR MONTH TO FLY TO LONDON FROM LOS ANGELES	June	345% more users visited	More momondo users searched in flights to London from Los Angeles in June than any other month

Cheap London flight deals and tips

Summary info about London flight prices, duration and airlines

Best One-Way Price	$137
Best Round-Trip Price	$454
Fastest flight time	6h 55m
Popular in	December

The best one-way flight price to London from United States in the last 72 hours is $137 (New York John F Kennedy Intl to London Gatwick).

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The best round-trip flight price to London from United States in the last 72 hours is $454 (New York John F Kennedy Intl to London Gatwick).

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The fastest flight to London from United States takes 6h 55m (New York John F Kennedy Intl to London Gatwick).

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December has the highest demand for flights to London, with a 5% price increase on average.

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Frequently asked questions about flying to London

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

Most flyers found that booking tickets 30 days in advance of their planned departure date is the best time to get cheap flights to London. During this timeframe, flight prices are around $570. Don’t hesitate to check prices now though because momondo users recently found tickets for as low as $540.

Is there an alternative airport near London?

Finding an alternative and possibly cheaper destination airport near London is possible. If you are planning a flight to London, consider booking flights to 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).

Is there a cheaper alternative to flying into London?

With an average price of $148 per person, London Stansted 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.

Are there flights to Covent Garden?

Yes, if you fly to London City in London which is the closest available airport to Covent Garden (7.5 mi away).

What’s the closest airport to Paddington Station?

The airport which is nearest to Paddington Station is London City. It is 9.8 mi away and is in London.

When did momondo last update prices for flights to London?

Prices for flights to London refresh daily.

How many operators does momondo search for flights to London?

As of October 2025, there are 98 operators available to choose from for flights to London.

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

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.

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

The required travel and health documents for your London 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. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Gatwick

Hounslow

Milton Keynes

Luton

Dover

Slough

Guildford

Dartford

Hayes

Crawley

Chelmsford

Brentwood

Colchester

Ilford

Folkestone

Romford

Cobham

Stansted

Watford

Richmond

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London.

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

Flights to London with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights to London?

momondo helps you find the best flight to London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.