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Cheap flights from Islip to London from £471

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 27/11. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — LON
14 Nov — 21 Nov1
1 adult
1 adult, Economy

Cheap 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 15 October 2025.

Round-trip from

£471

Popular in

December

Cheapest in

January

Average price

£413
27/11-4/12
  • 27/11-4/12
  • 2 total stops
  • 54h 12m total
  • Islip to London
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High demand for flights, 5% potential price rise
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Cheapest flight prices on average. 2% potential price decrease (£7 potential savings vs. average return price).
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Average for round-trip flights in October 2025
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Find 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 15 October 2025.

Thu 27/1110:02ISP - LGW
1 stop18h 58mMultiple Airlines
Thu 4/1214:00LGW - ISP
1 stop35h 14mMultiple Airlines
Deal found 13/10£471
Wed 12/1113:15ISP - LHR
2 stops27h 25mJetBlue
Wed 19/1107:25LHR - ISP
2 stops39h 36mJetBlue
Deal found 15/10£621
Thu 27/1110:02ISP - LHR
2 stops24h 48mMultiple Airlines
Thu 4/1208:45LHR - ISP
2 stops29h 26mMultiple Airlines
Deal found 13/10£638
Sat 18/1016:58ISP - LGW
1 stop36h 12mMultiple Airlines
Sat 25/1014:00LGW - ISP
1 stop35h 52mMultiple Airlines
Deal found 13/10£897
Sat 18/1011:35ISP - LHR
2 stops37h 55mJetBlue
Sat 25/1008:15LHR - ISP
2 stops33h 47mJetBlue
Deal found 13/10£940
Sat 29/1107:30ISP - LGW
2 stops22h 25mMultiple Airlines
Sat 6/1211:55LGW - ISP
2 stops33h 20mMultiple Airlines
Deal found 15/10£966
Sat 29/1112:40ISP - LHR
2 stops15h 35mMultiple Airlines
Sat 6/1219:55LHR - ISP
2 stops28h 50mMultiple Airlines
Deal found 15/10£1,128
Sat 18/1009:59ISP - LHR
2 stops19h 21mMultiple Airlines
Sat 25/1009:55LHR - ISP
3 stops38h 50mMultiple Airlines
Deal found 13/10£1,184
Wed 12/1120:45ISP - LHR
2 stops30h 45mMultiple Airlines
Wed 19/1109:20LHR - ISP
1 stop11h 55mMultiple Airlines
Deal found 15/10£2,001

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 15 October 2025.
Use the filters below to find and compare flights from Islip to London that are best for you.

Fly from

Islip

Fly to

London

Route

Depart

Return

Price

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Thu 27/11

10:02-10:00

1 stop18h 58m

London Gatwick

Thu 4/12

14:00-20:14

1 stop35h 14m

£471

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 12/11

13:15-21:40

2 stops27h 25m

London Heathrow

Wed 19/11

07:25-18:01

2 stops39h 36m

£621

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Thu 27/11

10:02-15:50

2 stops24h 48m

London Heathrow

Thu 4/12

08:45-09:11

2 stops29h 26m

£638

IslipLondon

ISP - LGW

ISPLGW

Islip Long Island

Sat 29/11

07:30-10:55

2 stops22h 25m

London Gatwick

Sat 6/12

11:55-16:15

2 stops33h 20m

£966

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Sat 29/11

12:40-09:15

2 stops15h 35m

London Heathrow

Sat 6/12

19:55-19:45

2 stops28h 50m

£1,128

IslipLondon

ISP - LHR

ISPLHR

Islip Long Island

Wed 12/11

20:45-08:30

2 stops30h 45m

London Heathrow

Wed 19/11

09:20-16:15

1 stop11h 55m

£2,001

Flights are sorted by cheapest return flights first.

Deals found on 13/10

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 to London?

Currently, February is the cheapest month in which you can book a flight from Islip to London (average of £181). Flying from Islip to London in June is currently the most expensive (average of £401). 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 to London?

    Airlines like JetBlue fly from Islip to London in about 27h 25m. The time it takes to get you to your destination can typically vary by up to . The distance between Islip and 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 to London?

    Currently, February is the cheapest month in which you can book a flight from Islip to London (average of £181). Flying from Islip to London in June is currently the most expensive (average of £401). 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
Croydon
Slough
Gatwick
Hounslow
Luton
Wembley
Deal
Ilford
Crawley
Hayes
Watford
Winchester
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Ipswich
Brentford
Dartford
Guildford
Eastbourne

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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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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