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Cheap flights from Islip, New York to London from £570

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LON
10 May — 17 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Islip to London

Enter your travel dates to find the best prices.

Cheapest flights from Islip to London
Explore the most affordable flight options available from Islip to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 April 2026.

Fri 10/710:48
ISP
-
LGW
1 stop18h 12m
Multiple Airlines
Tue 14/713:05
LGW
-
ISP
2 stops33h 24m
Multiple Airlines
Deal found 9/4£880
Sun 25/1013:55
ISP
-
LHR
2 stops37h 00m
JetBlue
Sat 31/1007:25
LHR
-
ISP
2 stops31h 49m
JetBlue
Deal found 6/4£890
Fri 15/520:59
ISP
-
LHR
2 stops55h 31m
JetBlue
Tue 19/508:15
LHR
-
ISP
2 stops38h 29m
JetBlue
Deal found 7/4£983
Sun 25/1009:59
ISP
-
LHR
1 stop16h 51m
Multiple Airlines
Sat 31/1009:40
LHR
-
ISP
1 stop14h 05m
Multiple Airlines
Deal found 6/4£1,011
Wed 20/509:59
ISP
-
LHR
1 stop15h 46m
Multiple Airlines
Wed 27/509:40
LHR
-
ISP
1 stop11h 30m
Multiple Airlines
Deal found 5/4£1,097
Sat 4/710:48
ISP
-
LGW
1 stop18h 12m
Multiple Airlines
Thu 16/714:00
LGW
-
ISP
2 stops50h 17m
Multiple Airlines
Deal found 7/4£1,097
Fri 10/706:00
ISP
-
LHR
2 stops43h 30m
JetBlue
Tue 14/708:15
LHR
-
ISP
2 stops44h 02m
JetBlue
Deal found 9/4£1,114
Fri 15/512:30
ISP
-
LHR
1 stop13h 15m
Multiple Airlines
Tue 19/509:40
LHR
-
ISP
1 stop15h 05m
Multiple Airlines
Deal found 7/4£1,118
Fri 22/507:25
ISP
-
LHR
1 stop18h 20m
Multiple Airlines
Fri 29/509:40
LHR
-
ISP
1 stop30h 25m
Multiple Airlines
Deal found 8/4£1,142
Sat 4/714:22
ISP
-
LGW
2 stops38h 13m
JetBlue
Thu 16/712:20
LGW
-
ISP
2 stops39h 57m
JetBlue
Deal found 7/4£1,148
Fri 10/709:59
ISP
-
LHR
1 stop15h 46m
Multiple Airlines
Tue 14/709:40
LHR
-
ISP
1 stop15h 05m
Multiple Airlines
Deal found 9/4£1,164
Sat 4/714:22
ISP
-
LHR
2 stops35h 08m
JetBlue
Thu 16/708:15
LHR
-
ISP
2 stops31h 20m
JetBlue
Deal found 7/4£1,181

Find flight deals from Islip to London

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 10 April 2026.

Round-trip from

£880

One-way from

£570

Popular in

December

Cheapest in

September

Average price

£455
10/7-14/7
  • 10/7-14/7
  • 3 total stops
  • 51h 36m total
  • Islip to London
Search Deals
10/5
  • 10/5
  • 2 total stops
  • 16h 15m total
  • Islip to London
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£10 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Islip to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 10 April 2026.
Use the filters below to find and compare flights from Islip to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 10/7

10:48-10:00

1 stop18h 12m

London Gatwick

Tue 14/7

14:00-10:03

1 stop25h 03m

£922

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

£983

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 4/7

10:48-10:00

1 stop18h 12m

London Gatwick

Thu 16/7

14:00-11:17

2 stops50h 17m

£1,097
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

£1,118

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 4/7

14:22-09:35

2 stops38h 13m

London Gatwick

Thu 16/7

12:20-23:17

2 stops39h 57m

£1,148

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

£1,181

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 10/7

06:00-09:35

2 stops22h 35m

London Gatwick

Tue 14/7

12:20-23:17

2 stops39h 57m

£1,192

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 20/5

18:40-13:30

2 stops37h 50m

London Heathrow

Wed 27/5

15:50-13:39

2 stops50h 49m

£1,240

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sat 4/7

12:30-08:35

1 stop15h 05m

London Heathrow

Thu 16/7

20:10-11:05

1 stop19h 55m

£1,383

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 22/5

12:30-07:55

2 stops38h 25m

London Gatwick

Fri 29/5

14:00-10:05

1 stop25h 05m

£1,445

Flights are sorted by cheapest return flights first.

Deals found on 10/4

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Islip to London

Have a flexible travel schedule? Discover the best time to fly to London from Islip with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Islip to London

What is the cheapest month to book a flight from Islip, New York to London?

Currently, November is the cheapest month in which you can book a flight from Islip, New York to London (average of £206). Flying from Islip, New York to London in June is currently the most expensive (average of £398). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Islip to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Islip to London?

    Most people fly from Islip Long Island (ISP) if they book a flight from Islip to London. On average, Long Island has 0 outbound flights to London per day from 0 airlines. Islip Long Island is conveniently located just 7.2 mi from Islip’s city center.

  • How long is the flight from Islip, New York to London?

    A quick flight from Islip, New York to London can take about 55h 31m. JetBlue provides one of the quickest options available for as low as £983. The distance from Islip, New York to London is about 3406 mi.

  • Can I find deals for flights from Islip to London that include hotel bookings?

    Yes. In addition to deals on Islip to London flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Islip to London?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to London.

  • Can I find deals for business class flights from Islip to London?

    Yes. Cheapflights offers flight deals from Islip to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip, New York to London?

    Currently, November is the cheapest month in which you can book a flight from Islip, New York to London (average of £206). Flying from Islip, New York to London in June is currently the most expensive (average of £398). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Hounslow
Gatwick
Luton
Ilford
Slough
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Chelmsford
Ipswich
Southend-on-Sea
Guildford
Bishop's Stortford

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How does Cheapflights help users find flights from Islip to London?

Deals for Islip to London flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

Why should you use Cheapflights to find cheap flight tickets from Islip to London?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Islip to London for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Islip to London with no change fees?

Certainly. Search results for flights to London from Islip shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Islip to London become cheaper?

Yes, Cheapflights offers price alerts on Islip to London flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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