What airlines fly to London?

British Airways, United Airlines and Delta are the top three most popular airlines that fly to London from Islip according to our data. British Airways is the first choice among our users, with 46% of people opting to fly with this airline when traveling to London. Keep in mind that there are 22 different airlines that fly to London 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?

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

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to London.

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

The necessary travel and health documents for your London 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.

$758 Cheap Flights from Islip to London in 2025/26

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Find the cheapest flights from Islip to London

Round-trip

One-way

Cheap round-trip flights

11:40 am - 10:00 amISP-LGW

17h 20m2 stops

2:00 pm - 10:37 amLGW-ISP

25h 37m1 stop

$758Multiple Airlines

Find Deal

jue., nov. 13 - vie., nov. 14

11:40 am - 10:00 amISP-LGW

17h 20m2 stops

2:00 pm - 10:37 amLGW-ISP

25h 37m1 stop

$759Multiple Airlines

Find Deal

jue., nov. 13 - vie., nov. 14

9:37 pm - 10:00 amISP-LGW

31h 23m1 stop

2:00 pm - 8:42 pmLGW-ISP

35h 42m1 stop

$794Multiple Airlines

Find Deal

jue., oct. 16 - mié., oct. 22

9:37 pm - 10:00 amISP-LGW

31h 23m1 stop

1:05 pm - 8:42 pmLGW-ISP

36h 37m2 stops

$833Multiple Airlines

Find Deal

jue., oct. 16 - mié., oct. 22

7:30 am - 9:05 amISP-LHR

20h 35m2 stops

9:50 am - 7:45 pmLHR-ISP

14h 55m2 stops

$1,065Multiple Airlines

Find Deal

jue., oct. 16 - mié., oct. 22

9:59 am - 6:30 amISP-LHR

15h 31m1 stop

6:00 am - 7:45 pmLHR-ISP

18h 45m2 stops

$1,718Multiple Airlines

Find Deal

jue., oct. 16 - mié., oct. 22

9:59 am - 6:30 amISP-LHR

15h 31m1 stop

8:25 am - 4:15 pmLHR-ISP

12h 50m1 stop

$1,979Multiple Airlines

Find Deal

jue., oct. 16 - mié., oct. 22

12:40 pm - 11:25 amISP-LHR

17h 45m2 stops

9:20 am - 4:15 pmLHR-ISP

11h 55m1 stop

$2,556Multiple Airlines

Find Deal

jue., nov. 13 - dom., nov. 23

Fly from

Fly to

Route

Depart

Return

Price

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

jue. 11/13

11:40 am-10:00 am

2 stops17h 20m

London Gatwick

vie. 11/14

2:00 pm-10:37 am

1 stop25h 37m

$758

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

jue. 11/13

11:40 am-10:00 am

2 stops17h 20m

London Gatwick

vie. 11/14

2:00 pm-10:37 am

1 stop25h 37m

$759

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

jue. 10/16

9:37 pm-10:00 am

1 stop31h 23m

London Gatwick

mié. 10/22

2:00 pm-8:42 pm

1 stop35h 42m

$794

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

jue. 10/16

9:37 pm-10:00 am

1 stop31h 23m

London Gatwick

mié. 10/22

1:05 pm-8:42 pm

2 stops36h 37m

$833

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

jue. 10/16

7:30 am-9:05 am

2 stops20h 35m

London Heathrow

mié. 10/22

9:50 am-7:45 pm

2 stops14h 55m

$1,065

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

jue. 10/16

9:59 am-6:30 am

1 stop15h 31m

London Heathrow

mié. 10/22

6:00 am-7:45 pm

2 stops18h 45m

$1,718

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

jue. 10/16

9:59 am-6:30 am

1 stop15h 31m

London Heathrow

mié. 10/22

8:25 am-4:15 pm

1 stop12h 50m

$1,979

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

jue. 11/13

12:40 pm-11:25 am

2 stops17h 45m

London Heathrow

dom. 11/23

9:20 am-4:15 pm

1 stop11h 55m

$2,556

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Islip to London

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?

The cheapest day to depart from Islip to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $624. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $670. 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 Islip 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 $665. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

When to book flights from Islip to London

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

Estimated round-trip price

Cheap Islip to London (ISP to LON) flight deals and tips

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

Direct flights	None

There are no direct flights from Islip to London. There are no popular flight routes from Islip to London.

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How far is Islip Long Island to London by plane?
The distance between Islip Long Island and London is about 3425.8 mi. In terms of flight time, this usually takes a little over 15h 31m.
When did momondo last update prices for flights from Islip Long Island Airport to London?
Prices for flights from Islip Long Island Airport to London are refreshed on a daily basis.
How old do you have to be to fly from Islip Long Island Airport to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Islip Long Island Airport to London.
What documentation or ID do you need to fly to London?
The necessary travel and health documents for your London 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.

Gatwick

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Dover

Luton

Slough

Milton Keynes

Hayes

Guildford

Dartford

Crawley

Stansted

Chelmsford

Brentwood

Ilford

Folkestone

Colchester

Watford

Wembley

Richmond

Croydon

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Islip to London. momondo saves you time and could save you money on your trip.

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

All flight searches from Islip to London on momondo can be filtered to show those which offer flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Islip to London.

I’m not ready to book a flight from Islip to London right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Islip to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.