Which airlines fly to London Heathrow Airport?

Virgin Atlantic, British Airways and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from Islip, New York according to our data. Virgin Atlantic 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 12 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Islip Long Island Airport to London Heathrow Airport?

Prices for flights from Islip Long Island Airport to London Heathrow Airport are refreshed on a daily basis.

How old do you have to be to fly from Islip Long Island Airport to London Heathrow Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to London Heathrow Airport.

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

The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

£300 Cheap Flights from Islip, New York to London Heathrow Airport in 2026

Find the cheapest flights from Islip, New York to London

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

12:55 - 11:55ISP Islip Long Island-LHR London Heathrow

18h 00m2 stops Baltimore/Washington Reykjavik Keflavik Intl

13:05 - 22:40LHR London Heathrow-ISP Islip Long Island

14h 35m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£733Multiple Airlines

Tue, 29 Sep - Tue, 6 Oct

16:30 - 19:30ISP Islip Long Island-LHR London Heathrow

22h 00m2 stops Baltimore/Washington Reykjavik Keflavik Intl

12:15 - 21:30LHR London Heathrow-ISP Islip Long Island

14h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£734Multiple Airlines

Mon, 8 Feb - Tue, 2 Mar

16:20 - 11:55ISP Islip Long Island-LHR London Heathrow

14h 35m2 stops Baltimore/Washington Reykjavik Keflavik Intl

21:25 - 23:40LHR London Heathrow-ISP Islip Long Island

31h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£735Multiple Airlines

Wed, 14 Oct - Wed, 21 Oct

15:10 - 20:20ISP Islip Long Island-LHR London Heathrow

24h 10m2 stops Baltimore/Washington Reykjavik Keflavik Intl

21:25 - 22:40LHR London Heathrow-ISP Islip Long Island

30h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£753Multiple Airlines

Mon, 12 Oct - Mon, 19 Oct

11:00 - 10:50ISP Islip Long Island-LHR London Heathrow

19h 50m2 stops Baltimore/Washington Reykjavik Keflavik Intl

12:15 - 21:40LHR London Heathrow-ISP Islip Long Island

14h 25m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£770Multiple Airlines

Thu, 29 Oct - Wed, 4 Nov

12:25 - 19:30ISP Islip Long Island-LHR London Heathrow

26h 05m2 stops Baltimore/Washington Reykjavik Keflavik Intl

20:35 - 21:40LHR London Heathrow-ISP Islip Long Island

30h 05m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£771Multiple Airlines

Thu, 5 Nov - Tue, 10 Nov

15:10 - 20:20ISP Islip Long Island-LHR London Heathrow

24h 10m2 stops Baltimore/Washington Reykjavik Keflavik Intl

21:25 - 23:40LHR London Heathrow-ISP Islip Long Island

31h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£790Multiple Airlines

Fri, 2 Oct - Wed, 7 Oct

16:05 - 19:30ISP Islip Long Island-LHR London Heathrow

22h 25m2 stops Baltimore/Washington Reykjavik Keflavik Intl

20:35 - 23:30LHR London Heathrow-ISP Islip Long Island

31h 55m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£791Multiple Airlines

Wed, 4 Nov - Sun, 8 Nov

16:05 - 10:50ISP Islip Long Island-LHR London Heathrow

13h 45m2 stops Baltimore/Washington Reykjavik Keflavik Intl

12:15 - 23:30LHR London Heathrow-ISP Islip Long Island

16h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£807Multiple Airlines

Fri, 4 Dec - Sun, 13 Dec

10:00 - 19:30ISP Islip Long Island-LHR London Heathrow

28h 30m2 stops Baltimore/Washington Reykjavik Keflavik Intl

20:35 - 22:45LHR London Heathrow-ISP Islip Long Island

31h 10m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£808Multiple Airlines

Thu, 25 Feb - Sun, 28 Feb

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Use the filters below to find and compare flights from Islip, New York to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Tue 29/9

12:55-11:55

2 stops18h 00m

London Heathrow

Tue 6/10

13:05-22:40

2 stops14h 35m

£733

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Mon 8/2

16:30-19:30

2 stops22h 00m

London Heathrow

Tue 2/3

12:15-21:30

2 stops14h 15m

£734

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Wed 14/10

16:20-11:55

2 stops14h 35m

London Heathrow

Wed 21/10

21:25-23:40

2 stops31h 15m

£735

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Mon 12/10

15:10-20:20

2 stops24h 10m

London Heathrow

Mon 19/10

21:25-22:40

2 stops30h 15m

£753

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Thu 29/10

11:00-10:50

2 stops19h 50m

London Heathrow

Wed 4/11

12:15-21:40

2 stops14h 25m

£770

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Thu 5/11

12:25-19:30

2 stops26h 05m

London Heathrow

Tue 10/11

20:35-21:40

2 stops30h 05m

£771

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Fri 2/10

15:10-20:20

2 stops24h 10m

London Heathrow

Wed 7/10

21:25-23:40

2 stops31h 15m

£790

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Wed 4/11

16:05-19:30

2 stops22h 25m

London Heathrow

Sun 8/11

20:35-23:30

2 stops31h 55m

£791

Fastest return journey

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Fri 4/12

16:05-10:50

2 stops13h 45m

London Heathrow

Sun 13/12

12:15-23:30

2 stops16h 15m

£807

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Thu 25/2

10:00-19:30

2 stops28h 30m

London Heathrow

Sun 28/2

20:35-22:45

2 stops31h 10m

£808

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Islip, New York 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

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

On average, the least expensive day to fly to London Heathrow Airport from Islip, New York is on a Monday. momondo users have found tickets for Monday departures for as low as £458. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £559.

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 in the morning. momondo users have found flights departing from Islip, New York to London Heathrow Airport in the morning for as low as £506. 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 £537 on average. Flights to London Heathrow Airport from Islip, New York in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.

When to book flights from Islip, New York to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Islip, New York to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Islip, New York to London Heathrow Airport (ISP to LHR) flight deals and tips

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

Best price found	£300
Fastest flight time	13h 10m
Direct flights	None

The best one-way flight to London Heathrow Airport from Islip, New York in the past 72 hours is £300. The best return flight deal from Islip, New York to London Heathrow Airport found on momondo in the last 72 hours is £733.

The fastest flight from Islip, New York to London Heathrow Airport takes 13h 10m

There are no direct flights from Islip, New York to London Heathrow Airport. There are no popular flight routes from Islip, New York to London Heathrow Airport.

Search flight deals

Frequently asked questions about flying from Islip, New York to London Heathrow Airport

How far is Islip Long Island to London Heathrow by plane?
London Heathrow is 3412.8 mi away from Islip Long Island. 13h 10m is a normal flight duration for this route.
When did momondo last update prices for flights from Islip Long Island Airport to London Heathrow Airport?
Prices for flights from Islip Long Island Airport to London Heathrow Airport are refreshed on a daily basis.
How old do you have to be to fly from Islip Long Island Airport to London Heathrow Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Islip Long Island Airport to London Heathrow Airport.
What documentation or ID do you need to fly to London Heathrow Airport?
The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

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Why use momondo?

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

It is quick and easy to find Islip to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo allows you to filter the results for Islip to London flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Islip and 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.

I’m not ready to book a flight from Islip 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 Islip and alert you when they change.