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 40% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 13 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.

£345 Cheap Flights from Islip, New York to London Heathrow Airport in 2026/27

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.

15:50 - 19:30ISP Islip Long Island-LHR London Heathrow

22h 40m2 stops Baltimore/Washington Reykjavik Keflavik Intl

20:35 - 23:50LHR London Heathrow-ISP Islip Long Island

32h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£748Multiple Airlines

Tue, 2 Mar - Thu, 11 Mar

09:50 - 10:50ISP Islip Long Island-LHR London Heathrow

21h 00m2 stops Baltimore/Washington Reykjavik Keflavik Intl

20:35 - 22:55LHR London Heathrow-ISP Islip Long Island

30h 20m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£749Multiple Airlines

Mon, 15 Mar - Mon, 22 Mar

12:45 - 10:50ISP Islip Long Island-LHR London Heathrow

17h 05m2 stops Baltimore/Washington Reykjavik Keflavik Intl

12:15 - 21:45LHR London Heathrow-ISP Islip Long Island

14h 30m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£777Multiple Airlines

Sat, 14 Nov - Wed, 18 Nov

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

22h 25m2 stops Baltimore/Washington Reykjavik Keflavik Intl

12:15 - 21:45LHR London Heathrow-ISP Islip Long Island

14h 30m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£781Multiple Airlines

Wed, 11 Nov - Wed, 18 Nov

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

26h 05m2 stops Baltimore/Washington Reykjavik Keflavik Intl

20:35 - 21:45LHR London Heathrow-ISP Islip Long Island

30h 10m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£784Multiple Airlines

Fri, 13 Nov - Tue, 17 Nov

11:20 - 19:30ISP Islip Long Island-LHR London Heathrow

27h 10m2 stops Baltimore/Washington Reykjavik Keflavik Intl

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

14h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£785Multiple Airlines

Thu, 7 Jan - Tue, 12 Jan

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

19h 50m2 stops Baltimore/Washington Reykjavik Keflavik Intl

20:35 - 21:30LHR London Heathrow-ISP Islip Long Island

29h 55m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£786Multiple Airlines

Thu, 25 Feb - Tue, 2 Mar

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

13h 45m2 stops Baltimore/Washington Reykjavik Keflavik Intl

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

30h 05m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£787Multiple Airlines

Tue, 1 Dec - Mon, 7 Dec

12:20 - 20:20ISP Islip Long Island-LHR London Heathrow

27h 00m2 stops Baltimore/Washington Reykjavik Keflavik Intl

13:05 - 23:00LHR London Heathrow-ISP Islip Long Island

14h 55m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£788Multiple Airlines

Sun, 28 Mar - Sat, 10 Apr

12:15 - 11:55ISP Islip Long Island-LHR London Heathrow

18h 40m2 stops Baltimore/Washington Reykjavik Keflavik Intl

21:25 - 23:35LHR London Heathrow-ISP Islip Long Island

31h 10m2 stops Reykjavik Keflavik Intl Baltimore/Washington

£790Multiple Airlines

Sun, 11 Apr - Sun, 18 Apr

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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 2/3

15:50-19:30

2 stops22h 40m

London Heathrow

Thu 11/3

20:35-23:50

2 stops32h 15m

£748

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Mon 15/3

09:50-10:50

2 stops21h 00m

London Heathrow

Mon 22/3

20:35-22:55

2 stops30h 20m

£749

Fastest return journey

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Sat 14/11

12:45-10:50

2 stops17h 05m

London Heathrow

Wed 18/11

12:15-21:45

2 stops14h 30m

£777

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Wed 11/11

16:05-19:30

2 stops22h 25m

London Heathrow

Wed 18/11

12:15-21:45

2 stops14h 30m

£781

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Fri 13/11

12:25-19:30

2 stops26h 05m

London Heathrow

Tue 17/11

20:35-21:45

2 stops30h 10m

£784

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Thu 7/1

11:20-19:30

2 stops27h 10m

London Heathrow

Tue 12/1

12:15-21:30

2 stops14h 15m

£785

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Thu 25/2

10:00-10:50

2 stops19h 50m

London Heathrow

Tue 2/3

20:35-21:30

2 stops29h 55m

£786

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Tue 1/12

16:05-10:50

2 stops13h 45m

London Heathrow

Mon 7/12

20:35-21:40

2 stops30h 05m

£787

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Sun 28/3

12:20-20:20

2 stops27h 00m

London Heathrow

Sat 10/4

13:05-23:00

2 stops14h 55m

£788

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Sun 11/4

12:15-11:55

2 stops18h 40m

London Heathrow

Sun 18/4

21:25-23:35

2 stops31h 10m

£790

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 £501. 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 £597.

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 £555. 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 £586 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	£345
Fastest flight time	14h 00m
Direct flights	None

The best one-way flight to London Heathrow Airport from Islip, New York in the past 72 hours is £345. The best return flight deal from Islip, New York to London Heathrow Airport found on momondo in the last 72 hours is £748.

The fastest flight from Islip, New York to London Heathrow Airport takes 14h 00m

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. 14h 00m 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.