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Cheap flights from Islip, New York to London from £364

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LON
30 May — 6 Jun1
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 30 April 2026.

Tue 9/616:41
ISP
-
LGW
1 stop36h 19m
Multiple Airlines
Tue 16/614:00
LGW
-
ISP
1 stop25h 03m
Multiple Airlines
Deal found 26/4£791
Fri 12/610:48
ISP
-
LGW
1 stop18h 12m
Multiple Airlines
Fri 19/614:00
LGW
-
ISP
1 stop25h 03m
Multiple Airlines
Deal found 28/4£815
Tue 23/616:41
ISP
-
LGW
1 stop36h 19m
Multiple Airlines
Fri 26/614:00
LGW
-
ISP
1 stop25h 03m
Multiple Airlines
Deal found 25/4£819
Wed 10/610:48
ISP
-
LGW
1 stop18h 12m
Multiple Airlines
Wed 17/614:00
LGW
-
ISP
1 stop25h 03m
Multiple Airlines
Deal found 26/4£830
Wed 10/610:48
ISP
-
LHR
1 stop16h 07m
Multiple Airlines
Wed 17/613:40
LHR
-
ISP
1 stop25h 23m
Multiple Airlines
Deal found 26/4£987
Thu 11/621:52
ISP
-
LGW
1 stop31h 08m
Multiple Airlines
Thu 18/614:00
LGW
-
ISP
1 stop35h 57m
Multiple Airlines
Deal found 29/4£988
Tue 9/614:35
ISP
-
LHR
2 stops19h 25m
Multiple Airlines
Tue 16/608:15
LHR
-
ISP
2 stops31h 25m
Multiple Airlines
Deal found 26/4£1,068
Thu 11/611:30
ISP
-
LHR
2 stops21h 25m
Multiple Airlines
Thu 18/620:10
LHR
-
ISP
2 stops42h 04m
Multiple Airlines
Deal found 29/4£1,079
Fri 12/611:30
ISP
-
LHR
2 stops20h 10m
Multiple Airlines
Fri 19/607:40
LHR
-
ISP
2 stops30h 34m
Multiple Airlines
Deal found 28/4£1,217
Tue 23/612:25
ISP
-
LGW
2 stops16h 10m
JetBlue
Fri 26/612:20
LGW
-
ISP
2 stops25h 54m
JetBlue
Deal found 25/4£1,286
Tue 23/612:25
ISP
-
LHR
2 stops27h 20m
JetBlue
Fri 26/611:55
LHR
-
ISP
2 stops26h 19m
JetBlue
Deal found 25/4£1,314
Tue 23/612:30
ISP
-
LHR
1 stop14h 30m
Multiple Airlines
Fri 26/610:05
LHR
-
ISP
1 stop14h 40m
Multiple Airlines
Deal found 25/4£1,575

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 30 April 2026.

Round-trip from

£791

One-way from

£364

Popular in

December

Cheapest in

September

Average price

£466
9/6-16/6
  • 9/6-16/6
  • 2 total stops
  • 61h 22m total
  • Islip to London
Search Deals
10/6
  • 10/6
  • 3 total stops
  • 51h 37m total
  • Islip to London
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£7 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£7 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 30 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

Tue 9/6

16:41-10:00

1 stop36h 19m

London Gatwick

Tue 16/6

14:00-10:03

1 stop25h 03m

£791

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Fri 12/6

10:48-10:00

1 stop18h 12m

London Gatwick

Fri 19/6

14:00-10:03

1 stop25h 03m

£815

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Tue 23/6

16:41-10:00

1 stop36h 19m

London Gatwick

Fri 26/6

14:00-10:03

1 stop25h 03m

£819

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Wed 10/6

10:48-10:00

1 stop18h 12m

London Gatwick

Wed 17/6

14:00-10:03

1 stop25h 03m

£830

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Thu 11/6

21:52-10:00

1 stop31h 08m

London Gatwick

Thu 18/6

14:00-20:57

1 stop35h 57m

£988

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 10/6

10:48-12:05

2 stops20h 17m

London Heathrow

Wed 17/6

13:40-10:03

1 stop25h 23m

£993

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Tue 9/6

14:35-15:00

2 stops19h 25m

London Heathrow

Tue 16/6

08:15-10:40

2 stops31h 25m

£1,068

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 11/6

11:30-13:55

2 stops21h 25m

London Heathrow

Thu 18/6

20:10-09:14

2 stops42h 04m

£1,079

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Tue 23/6

12:25-09:35

2 stops16h 10m

London Gatwick

Fri 26/6

12:20-09:14

2 stops25h 54m

£1,286

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Tue 23/6

12:25-20:45

2 stops27h 20m

London Heathrow

Fri 26/6

11:55-09:14

2 stops26h 19m

£1,314

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 20 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
No data available for this route at this time. Please check back soon.

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 27h 20m. JetBlue provides one of the quickest options available for as low as £1,314. 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.

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
Luton
Gatwick
Ilford
Slough
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Ipswich
Southend-on-Sea
Guildford
Bishop's Stortford
Chelmsford

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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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