Question 1

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

Accepted Answer

Austrian Airlines, British Airways, and Air Canada are the most popular carriers operating from United States to London Heathrow

Question 2

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 £455 when searching weeks before you fly. 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 £428 on momondo.

Question 3

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

Accepted Answer

The number of flights available between United States and London Heathrow Airport is 321 per day as of December 2025. The most frequent departure time is 20:00, with 71% of daily flights leaving in the evening.

Question 4

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 at midday. momondo users have found flights departing from United States to London Heathrow Airport at midday for as low as £417. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are £467 on average. Flights to London Heathrow Airport from United States in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

Question 5

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

Accepted Answer

You could potentially save up to 38% on your flight if you consider stops on a United States to London Heathrow Airport flight.

Question 6

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

Accepted Answer

Fly from New York John F Kennedy Intl to London Heathrow for the best United States - London Heathrow flight prices

Question 7

Which airlines fly to London Heathrow Airport?

Accepted Answer

British Airways, Virgin Atlantic and Iberia 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 39% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 16 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Question 8

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

Accepted Answer

2,249 flights are operational weekly from United States to London Heathrow Airport as of December 2025. The most popular departure day for this route is Wed, with 16% of flights per week taking off on this day.

Question 9

What day of the week experiences the fewest flight delays on this route?

Accepted Answer

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Question 10

How often are flights from the United States to London delayed?

Accepted Answer

Historically, on average around 17% of flights between United States and London have experienced a delay on any given week. The average delay length over the past 12 months has been 151 minutes.

Question 11

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

Accepted Answer

In general, October is the cheapest month to fly from United States to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £402. The month of September is another great option to travel to London Heathrow Airport, with average flight prices from United States averaging around £405.

Question 12

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

Accepted Answer

If you’re flying from a popular airport in United States, such as Boston or New York, and flying into London Heathrow Airport, then you can expect flight times to average 6h 30m and 6h 50m, respectively.

Question 13

What is the most punctual flight time for the United States to London flights?

Accepted Answer

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

Question 14

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

Accepted Answer

On average, the least expensive day to fly to London Heathrow Airport from United States is on a Monday. momondo users have found tickets for Monday departures for as low as £422. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Saturday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Saturday is £476.

Question 15

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 16

Which airline has the best punctuality record on the United States to London flights?

Accepted Answer

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 13% of their flights experiencing any sort of delay.

Question 17

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

Accepted Answer

Prices for flights from United States to London Heathrow Airport are updated daily.

Question 18

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

Accepted Answer

There are 15 operators available for flights from United States to London Heathrow Airport as of December 2025.

Question 19

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

Accepted Answer

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from United States to London Heathrow Airport.

Question 20

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

Accepted Answer

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.

Best price found	£175
Fastest flight time	6h 30m
Direct flights	Every day

Airline	Rating	Free Cancellation	Price
Air France	PriceFrom £231	Free Cancellation	Rating 7.4 1,507 reviews	Search Air France flights
British Airways	PriceFrom £308	Free Cancellation	Rating 6.7 7,585 reviews	Search British Airways flights
TAP AIR PORTUGAL	PriceFrom £316	Free Cancellation	Rating 7.2 2,091 reviews	Search TAP AIR PORTUGAL flights
KLM	PriceFrom £332	Free Cancellation	Rating 7.7 1,428 reviews	Search KLM flights
Finnair	PriceFrom £333	Free Cancellation	Rating 7.6 1,338 reviews	Search Finnair flights
Iberia	PriceFrom £333	Free Cancellation	Rating 7.0 3,053 reviews	Search Iberia flights
Aer Lingus	PriceFrom £342	Free Cancellation	Rating 7.2 1,399 reviews	Search Aer Lingus flights
Delta	PriceFrom £343	Free Cancellation	Rating 7.9 8,009 reviews	Search Delta flights
Virgin Atlantic	PriceFrom £343	Free Cancellation	Rating 7.5 675 reviews	Search Virgin Atlantic flights
Scandinavian Airlines	PriceFrom £351	Free Cancellation	Rating 7.4 1,607 reviews	Search Scandinavian Airlines flights

Cheap flights from the United States to London from £138

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How to get the cheapest flight ticket from United States to London Heathrow Airport

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?

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?

Fly from New York John F Kennedy Intl to London Heathrow for the best United States - London Heathrow flight prices

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

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

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.

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

You could potentially save up to 38% on your flight if you consider stops on a United States to London Heathrow Airport flight.

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

Austrian Airlines, British Airways, and Air Canada are the most popular carriers operating from United States to London Heathrow

Which airlines fly to London Heathrow Airport?

How often are flights from the United States to London delayed?

Historically, on average around 17% of flights between United States and London have experienced a delay on any given week. The average delay length over the past 12 months has been 151 minutes.

What is the most punctual flight time for the United States to London flights?

Generally, flights departing in the morning tend to experience fewer delays. Flights departing at night have, in the past, seen delays more frequently in comparison.

What day of the week experiences the fewest flight delays on this route?

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Thursday has historically seen more delays on average compared to the rest of the week.

Which airline has the best punctuality record on the United States to London flights?

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 13% of their flights experiencing any sort of delay.

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

The number of flights available between United States and London Heathrow Airport is 321 per day as of December 2025. The most frequent departure time is 20:00, with 71% of daily flights leaving in the evening.

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

2,249 flights are operational weekly from United States to London Heathrow Airport as of December 2025. The most popular departure day for this route is Wed, with 16% of flights per week taking off on this day.

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

If you’re flying from a popular airport in United States, such as Boston or New York, and flying into London Heathrow Airport, then you can expect flight times to average 6h 30m and 6h 50m, respectively.

Cheap United States to London Heathrow Airport flight deals and tips

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

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

Best airlines flying from United States to London Heathrow Airport

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

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