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.

$231 Cheap Flights from Islip to London (ISP-LON) in 2025

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Find the cheapest flights from Islip to London (ISP-LON)

Round-trip

One-way

Last minute

Cheap round-trip flights

11:40 am - 10:00 amISP-LGW

17h 20m1 stop

2:00 pm - 10:37 amLGW-ISP

25h 37m1 stop

$700

Find Deal

Thu, Oct 2 - Thu, Oct 9

5:05 pm - 10:00 amISP-LGW

35h 55m1 stop

2:00 pm - 10:37 amLGW-ISP

25h 37m1 stop

$754

Find Deal

Fri, Oct 3 - Fri, Oct 10

5:05 pm - 6:20 amISP-LGW

32h 15m2 stops

2:00 pm - 10:37 amLGW-ISP

25h 37m1 stop

$788

Find Deal

Fri, Oct 3 - Fri, Oct 10

4:33 pm - 10:00 amISP-LGW

36h 27m2 stops

2:00 pm - 10:37 amLGW-ISP

25h 37m1 stop

$804

Find Deal

Thu, Oct 2 - Thu, Oct 9

4:33 pm - 9:30 amISP-LHR

11h 57m1 stop

6:00 am - 8:01 pmLHR-ISP

19h 01m2 stops

$985

Find Deal

Thu, Oct 2 - Thu, Oct 9

2:19 pm - 7:20 amISP-LHR

12h 01m1 stop

2:40 pm - 8:01 pmLHR-ISP

10h 21m1 stop

$1,017

Find Deal

Thu, Oct 2 - Thu, Oct 9

2:19 pm - 9:05 amISP-LHR

13h 46m2 stops

9:50 am - 8:01 pmLHR-ISP

15h 11m2 stops

$1,130

Find Deal

Fri, Oct 3 - Fri, Oct 10

2:19 pm - 7:20 amISP-LHR

12h 01m1 stop

2:40 pm - 8:01 pmLHR-ISP

10h 21m1 stop

$1,225

Find Deal

Fri, Oct 3 - Fri, Oct 10

2:19 pm - 7:20 amISP-LHR

12h 01m1 stop

9:25 pm - 3:21 pmLHR-ISP

22h 56m2 stops

$1,502

Find Deal

Fri, Oct 3 - Fri, Oct 10

2:19 pm - 2:40 pmISP-LGW

19h 21m2 stops

8:55 am - 8:01 pmLGW-ISP

16h 06m2 stops

$1,596

Find Deal

Fri, Oct 3 - Fri, Oct 10

Fly from

Fly to

Route

Depart

Return

Price

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Thu 10/2

11:40 am-10:00 am

1 stop17h 20m

London Gatwick

Thu 10/9

2:00 pm-10:37 am

1 stop25h 37m

$700

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 10/3

5:05 pm-10:00 am

1 stop35h 55m

London Gatwick

Fri 10/10

2:00 pm-10:37 am

1 stop25h 37m

$754

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 10/3

5:05 pm-6:20 am

2 stops32h 15m

London Gatwick

Fri 10/10

2:00 pm-10:37 am

1 stop25h 37m

$788

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Thu 10/2

4:33 pm-10:00 am

2 stops36h 27m

London Gatwick

Thu 10/9

2:00 pm-10:37 am

1 stop25h 37m

$804

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 10/2

4:33 pm-9:30 am

1 stop11h 57m

London Heathrow

Thu 10/9

6:00 am-8:01 pm

2 stops19h 01m

$985

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 10/2

2:19 pm-7:20 am

1 stop12h 01m

London Heathrow

Thu 10/9

2:40 pm-8:01 pm

1 stop10h 21m

$1,017

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 10/3

2:19 pm-9:05 am

2 stops13h 46m

London Heathrow

Fri 10/10

9:50 am-8:01 pm

2 stops15h 11m

$1,130

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 10/3

2:19 pm-7:20 am

1 stop12h 01m

London Heathrow

Fri 10/10

2:40 pm-8:01 pm

1 stop10h 21m

$1,225

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Fri 10/3

2:19 pm-7:20 am

1 stop12h 01m

London Heathrow

Fri 10/10

9:25 pm-3:21 pm

2 stops22h 56m

$1,502

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 10/3

2:19 pm-2:40 pm

2 stops19h 21m

London Gatwick

Fri 10/10

8:55 am-8:01 pm

2 stops16h 06m

$1,596

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted 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 Tuesday. Travelers who choose to depart for London on a Tuesday will often find tickets for as low as $621. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $664. 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 $663. 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 11h 57m.
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.

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Dartford

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Chelmsford

Stansted

Brentwood

Ilford

Folkestone

Colchester

Watford

Richmond

Canterbury

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.