Cheap flights from Missouri to Illinois from $39
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Missouri to Illinois departing on 9/2. 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 Missouri 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 Missouri is in May. Flight prices, which tend to average around $184, 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 May, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $196.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from Missouri to Illinois is on a Thursday when prices can be found for as low as $813. Flights from Missouri to Illinois on a Tuesday will generally be more expensive and average around $1,041. 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 Missouri to Illinois during this time can be as low as $670. Flights at noon are often more expensive with an average ticket price of $1,303.
What is the cheapest Missouri to Illinois flight route?
Fly from Lambert-St Louis to Chicago Midway for the best Missouri - 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 Missouri when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $264 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Missouri for as low as $194 on momondo.
What cabin class options are available on Missouri to Illinois flights?
There are 4 cabin classes available to choose from on Missouri 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 Missouri to Illinois?
United Airlines, Southwest, and American Airlines are the most popular carriers operating from Missouri to Illinois
What airlines fly to Illinois?
American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Illinois from Missouri according to our data. American Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 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 Missouri to Illinois on average per day?
As of April 2025, there are 139 flights per day flying from Missouri to Illinois. The most common time of day flights depart is 3:00PM, with 44% of flights taking off in the afternoon.
How many flights depart from Missouri to Illinois on average per week?
As of April 2025, there are 975 flights per week flying from Missouri to Illinois. The most common day of the week flights depart is Fri, with 18% of flights taking off on this day.
Cheap Missouri to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Missouri to Illinois
When did momondo last update prices for flights from Missouri to Illinois?
Prices for flights from Missouri to Illinois refresh daily.
How many operators does momondo search for flights from Missouri to Illinois?
As of April 2025, there are 5 operators available to choose from for flights from Missouri to Illinois.
How old do you have to be to fly from Missouri to Illinois?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Missouri 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 Missouri to Illinois?
Based on momondo bookings for flights between Missouri and Illinois, the leading plane model is Boeing 737-800, making up 10.48% of the total bookings. Other popular models include Airbus A319 with 9.90%, Embraer 170 with 9.62%, and Embraer 175 with 8.47%.
Best airlines flying from Missouri to Illinois
Compare and see reviews for airlines that fly from Missouri to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $86 | Free Cancellation | Rating 7.1 26 reviews | |||
| PriceFrom $115 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $118 | Free Cancellation | Rating 6.5 27 reviews | |||
| PriceFrom $122 | Free Cancellation | Rating 7.4 8,685 reviews | |||
| PriceFrom $168 | Free Cancellation | Rating 8.0 4,287 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Missouri 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 Missouri.
Can I find flights from Missouri to Illinois with flexible booking policies on momondo?
Yes. All flights to Illinois from Missouri on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from Missouri to Illinois?
momondo helps you find the best flight between Missouri and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from Missouri to Illinois right now. Can momondo alert me if prices change?
Price alerts on flights to Illinois from Missouri are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.