Cheap flights from Missouri to Illinois
Find cheap flights from Missouri to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Missouri to Illinois
Keep the following information in mind while searching for Missouri to Illinois flight deals. Data was last updated April 17, 2025.
Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $97 (Southwest) |
One-way from | $49 (Southwest) |
Popular in | March |
Cheapest in | September |
Average price | $309 |
Good round-trip deal | $199 or less |
Good one-way deal | $79 or less |
Best time to book a flight from Missouri to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Missouri with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Missouri to Illinois
What is the cheapest month to book a flight from Missouri to Illinois?
Currently, August is the cheapest month in which you can book a flight from Missouri to Illinois (average of $245). Flying from Missouri to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from MO to IL?
Find hourly flight availability from Missouri to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Missouri to Illinois as you normally would.
Weekly flight availability from Missouri to Illinois
Explore weekly flight availability from Missouri to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 17, 2025.
The most flights from USMO to USIL are scheduled on a Thursday (68 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (36 on average).
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated April 17, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Missouri to Illinois. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
Crew
Entertainment
Boarding
Comfort
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Overall
Crew
Entertainment
Boarding
Comfort
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Overall
Crew
Entertainment
Boarding
Comfort
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Overall
Crew
Entertainment
Boarding
Comfort
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Overall
Crew
Entertainment
Boarding
Comfort
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Overall
Crew
Entertainment
Boarding
Comfort
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Related info for your journey
Find useful and relevant information for your journey from Missouri to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Missouri to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Missouri to Illinois
Discover the top 5 airlines that operate flights from Missouri to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$86 | Average$154 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$115 | Average$296 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$118 | Average$181 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$122 | Average$308 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$168 | Average$307 | FlexibilityNo cancel fee | On-time63% |