Searching for cheap Chicago St. Louis flights? Take a look at the flight schedule and book your travel only on Cleartrip.com. We offer you a wide choice of airlines like AirTran, Frontier, United, Air Canada, British Airways, Gulf Air, Iberia, Aer Lingus, Etihad Airways and American Airlines for your flight booking. There are 174 weekly flights from Chicago to St. Louis. The first flight from Chicago St. Louis is at 6:20 AM, which is AirTran airline 2856. The last flight from Chicago St. Louis is at 10:10 PM, which is American Airlines 1865. Be sure to find the best offers and deals for cheap flights from CHI to STL.
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| Departure (Chicago) | Arrival (St. louis) | Airlines | Days | Flight No. |
| 7:05 AM | 8:10 AM | AirTran | Mon,Tue,Wed,Thu,Fri | 2213 |
| 7:10 AM | 8:18 AM | United | Mon,Tue,Wed,Thu,Fri | 3624 |
| 7:20 AM | 8:25 AM | Frontier | Fri | 47 |
| 8:20 AM | 9:25 AM | AirTran | Sat | 2639 |
| 8:27 AM | 9:40 AM | United | Mon,Tue,Wed,Thu,Fri | 3388 |
| 9:10 AM | 9:00 PM | AirTran | Sat | 2864 |
| 10:17 AM | 11:31 AM | United | Mon,Tue,Wed,Thu,Fri | 3362 |
| 11:25 AM | 12:25 PM | AirTran | Sat | 4054 |
| 11:55 AM | 1:00 PM | British Airways | Daily | 1631 |
| 11:55 AM | 1:00 PM | Gulf Air | Daily | 6815 |
| 12:00 PM | 10:40 PM | AirTran | Mon,Fri,Sun | 2257 |
| 12:08 PM | 1:16 PM | United | Wed,Thu,Fri | 3374 |
| 12:15 PM | 1:20 PM | AirTran | Mon,Tue,Wed,Thu,Fri | 2050 |
| 1:40 PM | 2:45 PM | British Airways | Daily | 1677 |
| 1:40 PM | 2:45 PM | Air Berlin | Mon,Wed,Thu,Sat,Sun | 4627 |
| 2:05 PM | 5:25 PM | AirTran | Mon,Tue,Wed,Thu,Fri,Sun | 2793 |
| 3:10 PM | 4:20 PM | AirTran | Sat | 2786 |
| 3:30 PM | 4:35 PM | American Airlines | Daily | 1092 |
| 3:30 PM | 4:35 PM | Iberia | Daily | 7066 |
| 3:35 PM | 4:40 PM | AirTran | Mon,Tue,Wed,Thu,Fri | 2323 |
| 4:00 PM | 5:13 PM | United | Mon,Thu,Fri | 3650 |
| 5:00 PM | 6:17 PM | Aer Lingus | Daily | 6386 |
| 5:20 PM | 6:30 PM | American Airlines | Mon,Tue,Wed,Thu,Fri,Sun | 337 |
| 5:20 PM | 6:30 PM | Iberia | Mon,Tue,Wed,Thu,Fri,Sun | 4333 |
| 5:20 PM | 6:30 PM | American Airlines | Sat | 1371 |
| 5:30 PM | 8:10 PM | AirTran | Mon,Tue,Wed,Thu,Fri | 2739 |
| 6:20 PM | 7:30 PM | Iberia | Daily | 7062 |
| 6:20 PM | 7:25 PM | AirTran | Sat | 4187 |
| 6:35 PM | 7:45 PM | Etihad Airways | Daily | 3081 |
| 6:35 PM | 7:45 PM | WestJet | Daily | 5138 |
| 7:05 PM | 8:10 PM | AirTran | Mon,Tue,Wed,Thu,Fri,Sun | 3205 |
| 7:40 PM | 8:45 PM | Etihad Airways | Mon,Tue,Wed,Thu,Fri,Sun | 3227 |
| 8:00 PM | 9:05 PM | Iberia | Sat | 7180 |
| 9:55 PM | 11:00 PM | AirTran | Mon,Thu,Fri,Sun | 2451 |
| 10:02 PM | 11:15 PM | United | Mon,Fri | 3714 |
| 10:10 PM | 11:15 PM | WestJet | Mon,Tue,Wed,Thu,Fri,Sun | 5154 |