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 44% 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.

£569 Cheap Flights from Islip, New York to London Heathrow Airport in 2026

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Find the cheapest flights from Islip, New York to London

Round-trip

One-way

Cheap return flights

Enter your travel dates to find the best prices.

20:59 - 06:30

ISP

LHR

52h 31m

2 stops

11:55 - 17:44

LHR

ISP

58h 49m

2 stops

£888JetBlue

Thu, 7 May - Thu, 14 May

20:59 - 09:30

ISP

LHR

55h 31m

2 stops

08:15 - 17:44

LHR

ISP

38h 29m

2 stops

£981JetBlue

Fri, 15 May - Tue, 19 May

06:00 - 06:30

ISP

LHR

43h 30m

2 stops

08:15 - 23:17

LHR

ISP

44h 02m

2 stops

£1,112JetBlue

Fri, 10 Jul - Tue, 14 Jul

12:30 - 06:45

ISP

LHR

13h 15m

1 stop

09:40 - 19:45

LHR

ISP

15h 05m

1 stop

£1,116Multiple Airlines

Fri, 15 May - Tue, 19 May

17:00 - 06:30

ISP

LHR

32h 30m

2 stops

08:15 - 23:17

LHR

ISP

44h 02m

2 stops

£1,128JetBlue

Fri, 10 Jul - Tue, 14 Jul

07:25 - 06:45

ISP

LHR

18h 20m

1 stop

09:40 - 11:05

LHR

ISP

30h 25m

1 stop

£1,139Multiple Airlines

Fri, 22 May - Fri, 29 May

12:30 - 06:45

ISP

LHR

13h 15m

1 stop

09:40 - 19:45

LHR

ISP

15h 05m

1 stop

£1,144Multiple Airlines

Thu, 7 May - Thu, 14 May

09:59 - 06:45

ISP

LHR

15h 46m

1 stop

09:40 - 19:45

LHR

ISP

15h 05m

1 stop

£1,162Multiple Airlines

Fri, 10 Jul - Tue, 14 Jul

07:25 - 06:45

ISP

LHR

18h 20m

1 stop

09:40 - 16:10

LHR

ISP

11h 30m

1 stop

£1,164Multiple Airlines

Fri, 10 Jul - Tue, 14 Jul

14:22 - 06:30

ISP

LHR

35h 08m

2 stops

08:15 - 10:35

LHR

ISP

31h 20m

2 stops

£1,179JetBlue

Sat, 4 Jul - Thu, 16 Jul

JetBlue flights from Islip, New York to London Heathrow Airport

Our best JetBlue deals on Islip, New York to London Heathrow Airport flight tickets

JetBlue

7 May

ISP20:59Islip Long Island

52h 31m

2 stops

LHR06:30London Heathrow

14 May

LHR11:55London Heathrow

58h 49m

2 stops

ISP17:44Islip Long Island

£888

JetBlue

15 May

ISP20:59Islip Long Island

55h 31m

2 stops

LHR09:30London Heathrow

19 May

LHR08:15London Heathrow

38h 29m

2 stops

ISP17:44Islip Long Island

£981

JetBlue

10 Jul

ISP06:00Islip Long Island

43h 30m

2 stops

LHR06:30London Heathrow

14 Jul

LHR08:15London Heathrow

44h 02m

2 stops

ISP23:17Islip Long Island

£1,112

momondo Fare Finder

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 - LHR

ISPLHR

Islip Long Island

Thu 7/5

20:59-06:30

2 stops52h 31m

London Heathrow

Thu 14/5

11:55-17:44

2 stops58h 49m

£888

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 15/5

20:59-09:30

2 stops55h 31m

London Heathrow

Tue 19/5

08:15-17:44

2 stops38h 29m

£981

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 10/7

06:00-06:30

2 stops43h 30m

London Heathrow

Tue 14/7

08:15-23:17

2 stops44h 02m

£1,112

Fastest return journey

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 15/5

12:30-06:45

1 stop13h 15m

London Heathrow

Tue 19/5

09:40-19:45

1 stop15h 05m

£1,116

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 10/7

17:00-06:30

2 stops32h 30m

London Heathrow

Tue 14/7

08:15-23:17

2 stops44h 02m

£1,128

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 22/5

07:25-06:45

1 stop18h 20m

London Heathrow

Fri 29/5

09:40-11:05

1 stop30h 25m

£1,139

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 7/5

12:30-06:45

1 stop13h 15m

London Heathrow

Thu 14/5

09:40-19:45

1 stop15h 05m

£1,144

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 10/7

09:59-06:45

1 stop15h 46m

London Heathrow

Tue 14/7

09:40-19:45

1 stop15h 05m

£1,162

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 10/7

07:25-06:45

1 stop18h 20m

London Heathrow

Tue 14/7

09:40-16:10

1 stop11h 30m

£1,164

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sat 4/7

14:22-06:30

2 stops35h 08m

London Heathrow

Thu 16/7

08:15-10:35

2 stops31h 20m

£1,179

Flights are sorted by cheapest return flights first.

Showing 1-10 of 11 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 £406. 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 £465.

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 £421. 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 £453 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

Fastest flight time	15h 31m
Direct flights	None

The fastest flight from Islip, New York to London Heathrow Airport takes 15h 31m

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.

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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. 15h 31m 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.

Eastbourne

Milton Keynes

Luton

Gatwick

Stratford-upon-Avon

Slough

Maidstone

Northampton

Swindon

Wembley

Southend-on-Sea

Ipswich

Canterbury

Ilford

Guildford

Hayes

Poole

Chelmsford

Dover

Folkestone

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.