Cheap Flights from Champaign (CMI) to Islip (ISP)

Popular airlines from Champaign, IL (CMI-University Of Illinois Urbana-Champaign Williard) to MacArthur Airport (ISP)

  • Plan, book, fly with confidence

  • trending down icon
    Be in the know
    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon
    Book smarter
    Save up to 30% on select hotels after you book a flight*
  • one key icon
    Earn twice
    Earn your airline miles on top of our OneKeyCash
    Learn about One Key
Flights from Champaign (CMI) to Islip (ISP)
Origin airport
University Of Illinois Urbana-Champaign Williard
Destination airport
MacArthur
Distance
798 mi

Champaign to Islip Flights

The cheapest times to fly from Champaign to Islip

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Champaign to Islip are during the month of . You can find some of the cheapest flights from Champaign to Islip with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Champaign to Islip

Sunday is one of the best days to book for cheap flights from Champaign to Islip: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Champaign to Islip

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Champaign to Islip in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Champaign to Islip flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Champaign to Islip airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to MacArthur Airport (ISP) cost?
Discover the latest flight deals from CMI to ISP by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from CMI to ISP?
The cheapest flights from CMI to ISP are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from CMI to ISP?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from CMI to ISP. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from University Of Illinois Urbana-Champaign Williard Airport (CMI) to MacArthur Airport (ISP)?
Direct flights from University Of Illinois Urbana-Champaign Williard Airport (CMI) to MacArthur Airport (ISP) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filter tool. Enter your dates and pick either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from CMI to ISP?
Generally you’ll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* But this can vary depending on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from University Of Illinois Urbana-Champaign Williard Airport (CMI) to MacArthur Airport (ISP)?
To avoid possible delays on the University Of Illinois Urbana-Champaign Williard Airport (CMI) to MacArthur Airport (ISP) route, aim to fly before 3 PM. Flights after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from University Of Illinois Urbana-Champaign Williard Airport (CMI) to MacArthur Airport (ISP) last-minute?
Holding off until just before your departure to book a flight from CMI to ISP often results in higher prices. While you may come across some last-minute offers, there’s no guarantee. Be flexible with your travel plans to boost your chances of snagging a bargain.
Is it cheaper to book a CMI to ISP flight and hotel package?
Compared with arranging hotels and flights separately, booking a CMI to ISP flight and hotel package with Expedia could lead to significant savings. Better still, having everything in one easy place takes the hassle out of planning your trip. Just secure your flights and select from our extensive range of stays, then personalize your trip with other add-ons like tours and car rentals.
Can I cancel or change the date of my flight from University Of Illinois Urbana-Champaign Williard Airport (CMI) to MacArthur Airport (ISP)?
Typically, it’s possible to reschedule or cancel your CMI to ISP flight. However, if the booking was made more than 24 hours ago, additional fees may apply. Refer to your airline’s policies in your itinerary to see what changes are possible and if any costs are involved. You’ll also find more information on our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.