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Cheap Flights from Chicago to St. Louis $197.8

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Cheapest Flights from Chicago to St. Louis (ORD to STL)

Prices found within past 7 days. Prices and availability subject to change. Additional terms may apply.

Interesting Facts About Flights from Chicago to St. Louis (ORD to STL)

Question : Should you be aware of any airlines that have a reputation of delays for this route?
Answer : If you decide to book your flight with Delta Air Lines, keep an eye on your departure time. Over the past month, Delta Air Lines flights from O'Hare International Airport (ORD) to Lambert-St. Louis International Airport (STL) are late 100% of the time.

Question : Are prices changing frequently for this route?
Answer : Flight prices for ORD to STL fluctuate much more than most routes. The further out you book a route, the more likely you are to save.

Question : If your plans are flexible, have you considered changing your departure day?
Answer : The best day to fly on a budget this month is Tuesday. Having flexibility in your travel plans means you can save, so be sure to plan ahead when possible.

Question : Is there a preferred airline for getting to Lambert-St. Louis International Airport (STL) on schedule?
Answer : Republic Airlines holds the best record for flights from ORD to STL with a 77% on-time rate. Note that if they do have a delay, it usually lasts about 20-30 minutes.

Question : Looking for the shortest flight from ORD to STL?
Answer : If you're able to take the quickest direct flight (which is offered by American Airlines), you can leave ORD at 8 PM CST and get to STL at 9:07 PM CST (1 hour and 7 minutes).

Question : If you're booking ORD to STL, how many different choices of departure times do you have on a daily basis?
Answer : On average, you can expect 11 different options of flight times when you book. That is lower than the global average of 31.

Question : If having the most departure times is important to you, are there particular days that offer more options than others?
Answer : The days with the most departure times for this route are Monday and Tuesday with 60 options. Note that Saturday offers the least number of options with 40 flight times.