Cheap flights from Illinois to Missouri from $65
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to Missouri departing on 6/14. 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 Illinois to Missouri
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Southern / Mokulele flights from Illinois to Missouri
Our best Southern / Mokulele deals on Illinois to Missouri flight tickets
Frontier flights from Illinois to Missouri
Our best Frontier deals on Illinois to Missouri flight tickets
See travel insights to Missouri from
How to get the cheapest flight ticket from Illinois to Missouri
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 Missouri?
In general, May is the cheapest month to fly from Illinois to Missouri. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $233. If you aren’t able to travel to Missouri during the month of May, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $246.
What is the cheapest day to depart on your flight to Missouri?
The cheapest day to depart from Illinois to Missouri is on a Thursday when prices can be found for as low as $268. Flights from Illinois to Missouri on a Monday will generally be more expensive and average around $411. 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 Missouri?
According to our data, the cheapest time of day to fly to Missouri is in the afternoon. momondo users have found flights departing from Illinois to Missouri in the afternoon for as low as $275. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to Missouri are more costly in the morning, with an average ticket price of $332. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest Illinois to Missouri flight route?
Fly from Chicago O'Hare Intl to Lambert-St Louis for the best Illinois - Missouri flight prices
How far in advance should I book a flight to Missouri?
You are more likely to see cheaper flights to Missouri from Illinois when booking 18 weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around $270 when searching 18 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Illinois for as low as $150 on momondo.
What cabin class options are available on Illinois to Missouri flights?
There are 4 cabin classes available to choose from on Illinois to Missouri 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 Illinois to Missouri?
Contour, Southern / Mokulele, and Frontier are the most popular carriers operating from Illinois to Missouri
What airlines fly to Missouri?
American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Missouri from Illinois according to our data. American Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Missouri. Keep in mind that there are 5 different airlines that fly to Missouri on a routine basis, so you have a few additional options to choose from.
How many flights depart from Illinois to Missouri on average per day?
As of May 2025, 106 flights take off from Illinois and land in Missouri each day. The most common flight departure time for this route is 8:00PM, with 45% of daily flights taking off in the evening.
How many flights depart from Illinois to Missouri on average per week?
As of May 2025, there are 742 flights per week flying from Illinois to Missouri. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.
Cheap Illinois to Missouri flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Illinois to Missouri
When did momondo last update prices for flights from Illinois to Missouri?
Prices for flights from Illinois to Missouri were last updated today.
How many operators does momondo search for flights from Illinois to Missouri?
As of May 2025, there are 5 operators available to choose from for flights from Illinois to Missouri.
How old do you have to be to fly from Illinois to Missouri?
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 Illinois to Missouri.
What documentation or ID do you need to fly to Missouri?
The travel and health documents you'll need for your trip to Missouri may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Missouri. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Illinois to Missouri?
momondo data reveals that the most frequently booked plane model on the route from Illinois to Missouri is Airbus A319, representing 13.03% of all bookings. The subsequent popular models are Embraer 170 at 10.82%, Boeing 737-800 at 9.67%, and Embraer 175 at 9.07%.
Best airlines flying from Illinois to Missouri
Compare and see reviews for airlines that fly from Illinois to Missouri with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $88 | Free Cancellation | Rating 7.1 26 reviews | |||
| PriceFrom $115 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $116 | Free Cancellation | Rating 8.0 4,294 reviews | |||
| PriceFrom $117 | Free Cancellation | Rating 6.5 27 reviews | |||
| PriceFrom $141 | Free Cancellation | Rating 7.4 8,696 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Illinois to Missouri?
momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Illinois to Missouri. Millions of users trust and use momondo every year so you are in good hands.
Can I find flights from Illinois to Missouri with flexible booking policies on momondo?
Flights from Illinois to Missouri with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from Illinois to Missouri?
Once you have performed a search for Illinois to Missouri flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.
I’m not ready to book a flight from Illinois to Missouri right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of Illinois to Missouri flights. All you need is a valid email address and we will do the rest; it is that quick and easy.