What airlines fly to London?

United Airlines, British Airways and Virgin Atlantic are the top three most popular airlines that fly to London from Islip, New York according to our data. United Airlines is the first choice among our users, with 38% 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.

$380 Cheap Flights from Islip, New York to London in 2026

Find the cheapest flights from Islip, New York to London

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:25 pm - 10:00 amISP Islip Long Island-LGW London Gatwick

34h 35m1 stop Orlando

9:40 am - 5:30 pmLGW London Gatwick-ISP Islip Long Island

36h 50m2 stops Toronto Pearson Intl Orlando

$805Multiple Airlines

Sat, Oct 10 - Sat, Oct 17

6:25 pm - 10:00 amISP Islip Long Island-LGW London Gatwick

34h 35m1 stop Orlando

12:40 pm - 5:30 pmLGW London Gatwick-ISP Islip Long Island

33h 50m2 stops Toronto Pearson Intl Orlando

$819Multiple Airlines

Sat, Oct 10 - Sat, Oct 17

5:43 pm - 10:00 amISP Islip Long Island-LGW London Gatwick

35h 17m1 stop Orlando

2:00 pm - 4:58 pmLGW London Gatwick-ISP Islip Long Island

31h 58m1 stop Orlando

$845Multiple Airlines

Fri, Sep 25 - Fri, Oct 2

5:43 pm - 10:00 amISP Islip Long Island-LGW London Gatwick

35h 17m1 stop Orlando

2:00 pm - 4:58 pmLGW London Gatwick-ISP Islip Long Island

31h 58m1 stop Orlando

$865Multiple Airlines

Sat, Sep 26 - Sat, Oct 3

5:43 pm - 10:00 amISP Islip Long Island-LGW London Gatwick

35h 17m1 stop Orlando

2:00 pm - 11:20 amLGW London Gatwick-ISP Islip Long Island

26h 20m2 stops Orlando Raleigh-Durham

$905Multiple Airlines

Fri, Sep 25 - Fri, Oct 2

12:00 pm - 10:00 amISP Islip Long Island-LGW London Gatwick

17h 00m2 stops Raleigh-Durham Orlando

2:00 pm - 4:58 pmLGW London Gatwick-ISP Islip Long Island

31h 58m1 stop Orlando

$925Multiple Airlines

Sat, Sep 26 - Sat, Oct 3

4:30 pm - 7:30 pmISP Islip Long Island-LHR London Heathrow

22h 00m2 stops Baltimore/Washington Reykjavik Keflavik Intl

12:15 pm - 9:30 pmLHR London Heathrow-ISP Islip Long Island

14h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

$994Multiple Airlines

Mon, Feb 8 - Tue, Mar 2

9:40 am - 11:55 amISP Islip Long Island-LHR London Heathrow

21h 15m2 stops Baltimore/Washington Reykjavik Keflavik Intl

9:25 pm - 11:35 pmLHR London Heathrow-ISP Islip Long Island

31h 10m2 stops Reykjavik Keflavik Intl Baltimore/Washington

$996Multiple Airlines

Wed, Oct 14 - Wed, Oct 21

3:10 pm - 8:20 pmISP Islip Long Island-LHR London Heathrow

24h 10m2 stops Baltimore/Washington Reykjavik Keflavik Intl

9:25 pm - 10:40 pmLHR London Heathrow-ISP Islip Long Island

30h 15m2 stops Reykjavik Keflavik Intl Baltimore/Washington

$1,020Multiple Airlines

Mon, Oct 12 - Mon, Oct 19

3:10 pm - 2:40 pmISP Islip Long Island-LGW London Gatwick

18h 30m2 stops Baltimore/Washington Reykjavik Keflavik Intl

3:40 pm - 10:40 pmLGW London Gatwick-ISP Islip Long Island

36h 00m2 stops Reykjavik Keflavik Intl Baltimore/Washington

$1,020Multiple Airlines

Mon, Oct 12 - Mon, Oct 19

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipLondon

ISP Islip Long Island - LGW London Gatwick

ISPLGW

Islip Long Island

Sat 10/10

6:25 pm-10:00 am

1 stop34h 35m

London Gatwick

Sat 10/17

9:40 am-5:30 pm

2 stops36h 50m

$805

IslipLondon

ISP Islip Long Island - LGW London Gatwick

ISPLGW

Islip Long Island

Sat 10/10

6:25 pm-10:00 am

1 stop34h 35m

London Gatwick

Sat 10/17

12:40 pm-5:30 pm

2 stops33h 50m

$819

IslipLondon

ISP Islip Long Island - LGW London Gatwick

ISPLGW

Islip Long Island

Fri 9/25

5:43 pm-10:00 am

1 stop35h 17m

London Gatwick

Fri 10/2

2:00 pm-4:58 pm

1 stop31h 58m

$845

IslipLondon

ISP Islip Long Island - LGW London Gatwick

ISPLGW

Islip Long Island

Sat 9/26

5:43 pm-10:00 am

1 stop35h 17m

London Gatwick

Sat 10/3

2:00 pm-4:58 pm

1 stop31h 58m

$865

IslipLondon

ISP Islip Long Island - LGW London Gatwick

ISPLGW

Islip Long Island

Fri 9/25

5:43 pm-10:00 am

1 stop35h 17m

London Gatwick

Fri 10/2

2:00 pm-11:20 am

2 stops26h 20m

$905

IslipLondon

ISP Islip Long Island - LGW London Gatwick

ISPLGW

Islip Long Island

Sat 9/26

12:00 pm-10:00 am

2 stops17h 00m

London Gatwick

Sat 10/3

2:00 pm-4:58 pm

1 stop31h 58m

$925

Quickest round-trip

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Mon 2/8

4:30 pm-7:30 pm

2 stops22h 00m

London Heathrow

Tue 3/2

12:15 pm-9:30 pm

2 stops14h 15m

$994

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Wed 10/14

9:40 am-11:55 am

2 stops21h 15m

London Heathrow

Wed 10/21

9:25 pm-11:35 pm

2 stops31h 10m

$996

IslipLondon

ISP Islip Long Island - LHR London Heathrow

ISPLHR

Islip Long Island

Mon 10/12

3:10 pm-8:20 pm

2 stops24h 10m

London Heathrow

Mon 10/19

9:25 pm-10:40 pm

2 stops30h 15m

$1,020

IslipLondon

ISP Islip Long Island - LGW London Gatwick

ISPLGW

Islip Long Island

Mon 10/12

3:10 pm-2:40 pm

2 stops18h 30m

London Gatwick

Mon 10/19

3:40 pm-10:40 pm

2 stops36h 00m

$1,020

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, New York 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, New York to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $745. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $786. 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, New York in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $734 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $795. 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, New York to London

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

Estimated round-trip price

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

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

Best Price Found	$380
Fastest flight time	14h 50m
Direct flights	None

The best one-way flight to London from Islip, New York in the past 72 hours is $380. The best round-trip flight deal from Islip, New York to London found on momondo in the last 72 hours is $805.

The fastest flight from Islip, New York to London takes 14h 50m

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

Search flight deals

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

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 14h 50m.
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.

Hounslow

Gatwick

Milton Keynes

Hayes

Wembley

Luton

Croydon

Dover

Richmond

Stansted

Kingston upon Thames

Harrow

Cobham

Slough

Watford

Eastbourne

Uxbridge

Worthing

Romford

Ilford

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.

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Mon 9/28

Mon 10/5

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Nearby airports

Airlines

Cabin classes

Other United Kingdom destinations

Other flights from Islip, New York

Complete your trip

Feeling lucky

Fly into one of these airports located in London

London City Airport

London Gatwick Airport

London Heathrow Airport

London Luton Airport

London Southend Airport

London Stansted Airport

Cheap flights from Islip, New York to London from $380

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Islip, New York to London departing on 12/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Islip, New York to London

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

momondo Fare Finder

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

See travel insights to London from

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

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

What is the cheapest time of day to depart on your flight to London?

What airlines fly to London?

When to book flights from Islip, New York to London

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

Best Price Found

Fastest flight time

Direct flights

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

Traveling to a place near London?

Why use momondo?

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Islip, New York

According to popular flight searches on momondo this year

Complete your trip to London

Explore popular destinations other users love

According to popular flight searches on momondo this year