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$54+ 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 2/24. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — ORD
Dec 15 — Dec 221
Sun 12/15
Sun 12/22
1 adult, Economy
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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 December 10, 2024.

Round-trip from

$104
(Frontier)

One-way from

$54
(Cheapflightsfares)
From Islip Long Island to Illinois
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One-way flight from Islip Long Island to Illinois
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Find flight deals from Islip to Illinois

Cheapest flights from Islip to Illinois
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 December 10, 2024.

This CheapOair deal was found by Cheapflights users on 12/8. 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.
Sun 12/158:12 pmISP - ORD
1 stop14h 42mFrontier
Mon 12/166:07 pmORD - ISP
1 stop15h 18mFrontier
Deal found 12/8$235
This Southwest deal was found by Cheapflights users on 12/9. 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.
Tue 12/314:30 pmISP - ORD
1 stop6h 00mSouthwest
Sun 1/51:45 pmORD - ISP
2 stops9h 10mSouthwest
Deal found 12/9$401
This KAYAK deal was found by Cheapflights users on 12/8. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1512:43 pmISP - STL
1 stop11h 41mFrontier
Mon 12/169:15 amSTL - ISP
1 stop8h 47mFrontier
Deal found 12/8$438
This Southwest deal was found by Cheapflights users on 12/10. 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.
Sat 12/216:30 amISP - STL
1 stop11h 20mSouthwest
Sun 12/2210:50 amSTL - ISP
1 stop7h 25mSouthwest
Deal found 12/10$636
This Mytrip deal was found by Cheapflights users on 12/8. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/203:05 pmISP - ORD
3 stops24h 31mMultiple Airlines
Sat 12/217:53 pmORD - ISP
2 stops16h 24mMultiple Airlines
Deal found 12/8$828
This Mytrip deal was found by Cheapflights users on 12/9. 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.
Sat 12/215:51 pmISP - STL
3 stops19h 19mMultiple Airlines
Sun 12/225:15 pmSTL - ISP
3 stops23h 41mMultiple Airlines
Deal found 12/9$838

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 2,857,848 searches. Data last updated December 10, 2024.

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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

Wed 2/26

7:25 am-6:05 pm

1 stop9h 40m

$104

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Mon 1/6

8:40 am-11:40 pm

1 stop16h 00m

Lambert-St Louis

Wed 1/8

5:05 pm-7:02 pm

1 stop24h 57m

$117

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Thu 1/9

10:50 am-11:32 pm

3 stops13h 42m

Chicago O'Hare Intl

Thu 1/16

6:55 am-9:30 am

2 stops25h 35m

$328

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Tue 1/14

1:35 pm-7:40 pm

1 stop7h 05m

Lambert-St Louis

Thu 1/16

10:30 am-5:00 pm

1 stop5h 30m

$360

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Thu 5/8

5:40 am-11:50 am

1 stop7h 10m

Chicago O'Hare Intl

Sun 5/11

1:50 pm-7:05 pm

1 stop4h 15m

$376

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Sat 12/21

5:51 pm-12:10 pm

3 stops19h 19m

Lambert-St Louis

Sun 12/22

5:15 pm-5:56 pm

3 stops23h 41m

$838

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Mon 2/24

9:07 am-4:03 pm

1 stop7h 56m

$54

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Thu 1/23

10:50 am-11:32 pm

3 stops13h 42m

$165

IslipChicago

ISP - ORD

ISPORD

Islip Long Island

Thu 1/23

6:10 am-4:45 pm

2 stops11h 35m

$188

IslipSt. Louis

ISP - STL

ISPSTL

Islip Long Island

Tue 12/31

4:30 pm-8:45 pm

1 stop5h 15m

$213

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

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.
Estimated round-trip 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.

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, September is the cheapest month in which you can book a flight from Islip, New York to Illinois (average of $232). Flying from Islip, New York to Illinois in June is currently the most expensive (average of $308). 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 December 10, 2024.
Read through reviews of airlines operating flights from Islip to Illinois, such as Southwest and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,902 reviews

Food

7.2

Comfort

8.1

Crew

8.7

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

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.

Southwest
8.1
Very good
4,902 reviews
Southwest
8.1
Very good
4,902 reviews

Food

7.2

Comfort

8.1

Crew

8.7

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

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.

Frontier
6.1
Okay
3,494 reviews
Southwest
8.1
Very good
4,902 reviews

Food

7.2

Comfort

8.1

Crew

8.7

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

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.

  • What airport do you fly from for flights from Islip to Illinois?

    Islip Long Island (ISP), located 7.2 mi from the city center, is the airport you fly out of when you book flights from Islip to Illinois.

  • What are the most popular routes from Islip, New York to Illinois?

    Most travelers choose Islip Long Island - Chicago O'Hare Intl, Islip Long Island - Lambert-St Louis or Islip Long Island - Decatur Arpt when deciding on the best route from Islip, New York to Illinois.

  • Can I find deals for flights from Islip to Illinois that include hotel bookings?

    Yes. In addition to deals on Islip to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Illinois.

  • Can I find deals for business class flights from Islip to Illinois?

    Yes. Cheapflights offers flight deals from Islip to Illinois 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, New York to Illinois?

    Currently, September is the cheapest month in which you can book a flight from Islip, New York to Illinois (average of $232). Flying from Islip, New York to Illinois in June is currently the most expensive (average of $308). 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

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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 2,857,848 searches. Data last updated December 10, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$243Average$328FlexibilityNo cancel feeOn-time62%
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