$84+ Cheap flights from Islip, NY (ISP) to Illinois
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 2/21. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Islip to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Islip to Illinois
Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Illinois (USIL). 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 January 8, 2025.
Round-trip from | $101 (Frontier) |
|---|---|
One-way from | $84 (Cheapflightsfares) |
Find flight deals from Islip to Illinois
Cheapest flights from Islip to IllinoisExplore the most affordable flight options available from Islip to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2025.
Explore the most affordable flight options available from Islip to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 8, 2025.
This Frontier deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This CheapOair deal was found by Cheapflights users on 1/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Southwest deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 1/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Find flights from Islip to Illinois within your budget
Customize your flight search to find flights from Islip to Illinois 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 2,558,603 searches. Data last updated January 8, 2025.
Fly from
Fly to
Route
Depart
Return
Price
IslipChicago
ISP - ORD
ISPORD
Islip Long Island
Sat 2/22
9:33 pm-7:09 am
1 stop10h 36m
Chicago O'Hare Intl
Sat 3/1
8:44 pm-7:52 am
1 stop10h 08m
IslipSt. Louis
ISP - STL
ISPSTL
Islip Long Island
Mon 2/10
8:12 pm-11:31 pm
1 stop28h 19m
Lambert-St Louis
Sat 2/15
5:20 pm-12:11 pm
1 stop17h 51m
IslipChicago
ISP - ORD
ISPORD
Islip Long Island
Tue 2/4
1:35 pm-10:20 pm
1 stop9h 45m
Chicago O'Hare Intl
Tue 2/11
7:00 am-12:10 pm
1 stop4h 10m
IslipChicago
ISP - ORD
ISPORD
Islip Long Island
Mon 1/27
5:20 pm-8:13 pm
2 stops27h 53m
Chicago O'Hare Intl
Mon 2/3
5:50 am-4:40 pm
2 stops9h 50m
IslipChicago
ISP - ORD
ISPORD
Islip Long Island
Fri 2/21
9:07 am-3:53 pm
1 stop7h 46m
IslipChicago
ISP - ORD
ISPORD
Islip Long Island
Fri 1/17
5:55 am-4:45 pm
2 stops11h 50m
IslipSt. Louis
ISP - STL
ISPSTL
Islip Long Island
Tue 6/24
6:05 pm-11:37 pm
1 stop6h 32m
Best time to book a flight from Islip to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Islip with our price prediction graph.
Travel insights for flights from Islip to Illinois
Get recent, data-driven insights about flights from Islip to Illinois including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Islip, New York to Illinois?
Currently, August is the cheapest month in which you can book a flight from Islip, New York to Illinois (average of $245). Flying from Islip, New York to Illinois in March is currently the most expensive (average of $318). 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.
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated January 8, 2025.
Read through reviews of airlines operating flights from Islip to Illinois, such as Frontier and Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Comfort
Overall
Entertainment
Boarding
Food
Crew
Reviews
We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
Comfort
Overall
Entertainment
Boarding
Food
Crew
Reviews
We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
Comfort
Overall
Entertainment
Boarding
Food
Crew
Reviews
We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.
Related info for your journey
Find useful and relevant information for your journey from Islip to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Islip to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Islip to Illinois
Discover the top airline that operate flights from Islip to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 8, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$243 | Average$328 | FlexibilityNo cancel fee | On-time62% |