Cheap flights from St. Louis, MO to Islip, NY

Flights starting at $73. Choose between Frontier Airlines, Spirit Airlines, or Southern Airways Express to find the best price.

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Tips to know when travelling to Islip

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The most popular airlines for this route are Frontier Airlines, Spirit Airlines, Southern Airways Express, Silver Airways, and Sun Country Airlines. St. Louis and Islip have 38 direct flights per week. When you arrive at Islip, consider visiting Staten Island, Metropolitan Museum of Art, Statue of Liberty, Times Square, Empire State Building, and Manhattan Island.

Check-in for a flight from St. Louis to Islip

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
Southern Airways ExpressFDY9XYesNo
Silver AirwaysSIL3MNoOpens 24 days before flight
Closes 2 hours before flight
Sun Country AirlinesSCXSYYesNo

Weather in Islip

Average Weather

MonthAverage monthly max temperatureAverage monthly min temperature
January3°C-1°C
February4°C0°C
March7°C2°C
April12°C7°C
May17°C12°C
June22°C17°C
July26°C21°C
August26°C21°C
September22°C18°C
October17°C13°C
November11°C6°C
December7°C2°C
Hottest Month
26°C
July
Coldest month
-1°C
January
Sunny days
271
days per year
Snow days
8
days per year

14 day forecast

Friday
22 Mar
4°C-2°C
29 Mar
14°C7°C
Saturday
23 Mar
85%
11°C5°C
30 Mar
89%
12°C4°C
Sunday
24 Mar
6°C1°C
31 Mar
70%
9°C4°C
Monday
25 Mar
10°C1°C
1 Apr
9°C1°C
Tuesday
26 Mar
10°C2°C
2 Apr
9°C4°C
Wednesday
27 Mar
88%
6°C5°C
3 Apr
84%
10°C9°C
Thursday
28 Mar
81%
12°C6°C
4 Apr
88%
19°C10°C

Frequently asked questions

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What time do flights between St. Louis and Islip depart?
What time do flights between St. Louis and Islip arrive?

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