Cheap flights from Knoxville to Illinois from $49
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Illinois departing on 7/28. 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 Knoxville 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 Knoxville is in September. Flight prices, which tend to average around $179, 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 September, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $202.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Knoxville to Illinois is on a Friday when prices can be found for as low as $397. Flights from Knoxville to Illinois on a Sunday will generally be more expensive and average around $750. 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 in the morning. Flights from Knoxville to Illinois during this time can be as low as $484. Flights at noon are often more expensive with an average ticket price of $709.
What is the cheapest Knoxville McGhee Tyson to Illinois flight route?
Fly from Knoxville McGhee Tyson to Belleville for the best Knoxville McGhee Tyson - 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 Knoxville when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $278 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Knoxville for as low as $205 on momondo.
What cabin class options are available on Knoxville McGhee Tyson to Illinois flights?
There are 4 cabin classes available to choose from on Knoxville McGhee Tyson to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Knoxville McGhee Tyson to Illinois?
Allegiant Air and Frontier are the most popular carriers operating from Knoxville McGhee Tyson to Illinois
What airlines fly to Illinois?
United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Illinois from Knoxville according to our data. United Airlines is the first choice among our users, with 52% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from Knoxville to Illinois on average per day?
As of July 2025, there are 17 flights per day flying from Knoxville to Illinois. The most common time of day flights depart is 1:00PM, with 55% of flights taking off in the afternoon.
How many flights depart from Knoxville to Illinois on average per week?
As of July 2025, 119 flights take off from Knoxville and land in Illinois each week. The most common flight departure day for this route is Thu, with 26% of weekly flights taking off on this day.
Cheap Knoxville to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Knoxville to Illinois
When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Illinois?
Prices for flights from Knoxville McGhee Tyson Airport to Illinois are updated daily.
How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Illinois?
There are 4 operators available for flights from Knoxville McGhee Tyson Airport to Illinois as of July 2025.
How old do you have to be to fly from Knoxville McGhee Tyson Airport to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents required for your trip to Illinois can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Illinois. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from Knoxville to Illinois?
Based on momondo bookings for flights between Knoxville and Illinois, the leading plane model is Canadair (Bombardier) Regional Jet CRJ-550, making up 19.69% of the total bookings. Other popular models include Embraer 175 (Enhanced Winglets) with 18.38%, Canadair (Bombardier) Regional Jet 700 with 10.89%, and Embraer ERJ-145 with 9.57%.
Best airlines flying from Knoxville to Illinois
Compare and see reviews for airlines that fly from Knoxville to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $74 | Free Cancellation | Rating 7.2 708 reviews | |||
| PriceFrom $164 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $183 | Free Cancellation | Rating 7.4 8,861 reviews | |||
| PriceFrom $233 | Free Cancellation | Rating 8.0 7,982 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Knoxville to Illinois?
Finding the right flight to Illinois from Knoxville is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Illinois quick and easy, saving you time and money.
Can I find flights from Knoxville to Illinois with flexible booking policies on momondo?
Yes. momondo allows you to filter the results for Knoxville to Illinois flights to just show those with flexible booking policies.
How can momondo help me find flights from Knoxville to Illinois?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Illinois from Knoxville.
I’m not ready to book a flight from Knoxville to Illinois right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Illinois from Knoxville. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.