Cheap flights from Florida Keys to Illinois from $42
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Florida Keys to Illinois departing on 7/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from Florida Keys to Illinois
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from Florida Keys is in February. Flight prices, which tend to average around $160, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of February, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $178.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Florida Keys to Illinois is on a Thursday when prices can be found for as low as $329. Flights from Florida Keys to Illinois on a Sunday will generally be more expensive and average around $939. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Illinois?
Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Florida Keys to Illinois during this time can be as low as $353. Flights in the morning are often more expensive with an average ticket price of $507.
What is the cheapest Florida Keys to Illinois flight route?
Fly from Key West to Chicago O'Hare Intl for the best Florida Keys - Illinois flight prices
How far in advance should I book a flight to Illinois?
You are more likely to see cheaper flights to Illinois from Florida Keys when booking 8 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $240 when searching 8 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Florida Keys for as low as $199 on momondo.
What cabin class options are available on Florida Keys to Illinois flights?
There are 4 cabin classes available to choose from on Florida Keys to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
How many flights depart from Florida Keys to Illinois on average per day?
The number of flights available between Florida Keys and Illinois is 44 per day as of June 2025. The most frequent departure time is 1:00PM, with 100% of daily flights leaving in the afternoon.
How many flights depart from Florida Keys to Illinois on average per week?
As of June 2025, there are 313 flights per week flying from Florida Keys to Illinois. The most common day of the week flights depart is Thu, with 17% of flights taking off on this day.
Cheap Florida Keys to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Florida Keys to Illinois
When did momondo last update prices for flights from Florida Keys to Illinois?
Prices for flights from Florida Keys to Illinois are refreshed on a daily basis.
How many operators does momondo search for flights from Florida Keys to Illinois?
There are 6 operators available for flights from Florida Keys to Illinois as of June 2025.
How old do you have to be to fly from Florida Keys to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Florida Keys to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from Florida Keys to Illinois?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Florida Keys to Illinois is Boeing 737-800 (19.90% of total bookings). The next most popular plane models are Airbus A321neo (8.58%), Boeing 737 MAX 8 (8.19%), and Boeing 737-900 (7.81%).
Best airlines flying from Florida Keys to Illinois
Compare and see reviews for airlines that fly from Florida Keys to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $224 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $289 | Free Cancellation | Rating 7.2 10,000 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Florida Keys to Illinois?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Illinois from Florida Keys.
Can I find flights from Florida Keys to Illinois with flexible booking policies on momondo?
Yes. All flights to Illinois from Florida Keys on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Florida Keys to Illinois?
Once all potential Florida Keys to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Florida Keys to Illinois right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Florida Keys to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.