Find cheap flights to Islip from $90
Trusted by millions
Kiwi.com Guarantee for stress-free travel
One search, all the best deals
Explore deals for your Islip getaway
Weather in Islip
Average Weather
Month | Average monthly max temperature | Average monthly min temperature |
January | 3°C | -1°C |
February | 4°C | -1°C |
March | 7°C | 2°C |
April | 12°C | 7°C |
May | 17°C | 12°C |
June | 22°C | 17°C |
July | 26°C | 21°C |
August | 26°C | 21°C |
September | 22°C | 18°C |
October | 17°C | 13°C |
November | 11°C | 6°C |
December | 7°C | 2°C |
14 day forecast
Cheapest month to fly to Islip
Explore price trends for trips to Islip
Showing prices in USD
Annual Avg. Price | 82 USD |
November 2025 | 33 USD |
December 2025 | 33 USD |
January 2026 | 45 USD |
February 2026 | 45 USD |
March 2026 | 49 USD |
April 2026 | 61 USD |
May 2026 | 108 USD |
June 2026 | 108 USD |
July 2026 | 108 USD |
August 2026 | 202 USD |
September 2026 | 108 USD |
Airlines flying to Islip
Best airlines flying to Islip
- Wizz Air
- Cape Air
- Tway Airlines
- Lufthansa
- Hainan Airlines
- Pegasus
- Vueling
- China Airlines
- Iberia Airlines
- Ryanair
- TUI fly Belgium
- Norwegian Air Shuttle
- SAS
- Saudi Arabian Airlines
- Air Canada
- HiSky Europe
- United Airlines
- Aer Lingus
- Royal Air Maroc
- Norse Atlantic Airways