Cheap Flights From O'Hare Intl. (ORD) To Lambert-St. Louis Intl. (STL)

If you’d love to venture from O’Hare Airport to Lambert-St. Louis Intl. Airport (STL) as fast as possible, you’ll be happy to know multiple airlines operate nonstop flights. Choose your favorite seat with United Airlines or American Airlines.

You have a choice of a few airlines that advertise direct flights between Chicago and St. Louis. United Airlines (UA) is one of the most reputable. This carrier operates approximately 212 flights every month. Don’t forget to also look into the deals available through American Airlines (AA). Another leading carrier, it operates 165 flights each month on the Chicago to St. Louis route. Compare the two to find your perfect fare.

Airfares offered on Friday tend to be the cheapest, according to flight demand on Travelocity.ca in 2021. Purchasing your airfares on a Thursday or Saturday can also provide better value, however our advice if you’re looking to save money is to avoid booking on a Wednesday or Sunday. Our data shows that those two days have the highest ticket values on average, so keep this in mind if you’re browsing flight deals.

Frequent travellers may already know this, but earlier in the week is often the cheapest time to fly. Flights departing on a Monday are the cheapest of the week. Since flights towards the middle of the week tend to be more popular, this causes the prices to rise. This is why, on average, airfares booked on Travelocity.ca in 2021 were most expensive for Wednesday departures.

Here’s the deal: It is typically possible to start comparing international airfares on Travelocity.ca up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 2-4 weeks prior to their travel dates.*According to flight demand on Travelocity.ca from January to December 2021. Savings are subject to change and may vary depending on selections made.