Cheap flights from Knoxville to Illinois from $53
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 6/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from Knoxville to Illinois
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Frontier flights from Knoxville to Illinois
Our best Frontier deals on Knoxville to Illinois flight tickets
American Airlines flights from Knoxville to Illinois
Our best American Airlines deals on Knoxville to Illinois flight tickets
See travel insights to Illinois from
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 $169, 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 $201.
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 $379. Flights from Knoxville to Illinois on a Sunday will generally be more expensive and average around $738. 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 $476. Flights at noon are often more expensive with an average ticket price of $765.
What is the cheapest Knoxville McGhee Tyson to Illinois flight route?
Fly from Knoxville McGhee Tyson to Chicago Midway 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 24 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $281 when searching 24 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 $178 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, Frontier, and American Airlines 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 55% 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 May 2025, there are 27 flights per day flying from Knoxville to Illinois. The most common time of day flights depart is 3:00PM, with 51% of flights taking off in the afternoon.
How many flights depart from Knoxville to Illinois on average per week?
As of May 2025, 192 flights take off from Knoxville and land in Illinois each week. The most common flight departure day for this route is Thu, with 15% 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 May 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 20.18% of the total bookings. Other popular models include Embraer 175 (Enhanced Winglets) with 18.04%, Embraer ERJ-145 with 13.55%, and Airbus A319 with 10.17%.
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 7.3 733 reviews | |||
| PriceFrom $164 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $181 | Free Cancellation | Rating 7.4 8,731 reviews | |||
| PriceFrom $233 | Free Cancellation | Rating 8.0 7,946 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.