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

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

The cheapest flights to O'Hare Intl. found within the past 7 days were CA $246 round trip and CA $124 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $246 Roundtrip, found 2 days ago
CA $246
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $246 found 2 days ago
Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $251 Roundtrip, found 2 days ago
CA $251
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $251 found 2 days ago
Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $264 Roundtrip, found 2 days ago
CA $264
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $264 found 2 days ago
Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $271 Roundtrip, found 2 days ago
CA $271
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $271 found 2 days ago
Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $300 Roundtrip, found 2 days ago
CA $300
Roundtrip
found 2 days ago
Select American Airlines flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $300 found 2 days ago
Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $305 Roundtrip, found 2 days ago
CA $305
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $305 found 2 days ago
Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $306 Roundtrip, found 2 days ago
CA $306
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $306 found 2 days ago
Sun, Aug. 10 - Thu, Aug. 14
STL
St. Louis
ORD
Chicago
CA $311 Roundtrip, found 1 day ago
CA $311
Roundtrip
found 1 day ago
Select Southern Airways Express flight, departing Sun, Aug. 10 from St. Louis to Chicago, returning Thu, Aug. 14, priced at CA $311 found 1 day ago
Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $313 Roundtrip, found 2 days ago
CA $313
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $313 found 2 days ago
Sat, Aug. 30 - Mon, Sep. 1
STL
St. Louis
ORD
Chicago
CA $314 Roundtrip, found 2 days ago
CA $314
Roundtrip
found 2 days ago
Select Delta flight, departing Sat, Aug. 30 from St. Louis to Chicago, returning Mon, Sep. 1, priced at CA $314 found 2 days ago

Frequently asked questions

Are there direct flights from Lambert Field to ORD?
Your next incredible adventure is on the opposite side of just one flight. You can travel direct from St. Louis Lambert International Airport to ORD with multiple airlines, including United Airlines and American Airlines.
What airlines fly from St. Louis Lambert International Airport to O'Hare Intl. Airport (ORD)?
Choose from a number of airlines that offer direct flights between St. Louis and Chicago. United Airlines (UA) is one of the most well-known. This air carrier operates roughly 212 flights every month. You may want to also look up the deals on offer from American Airlines (AA). This airline operates 165 flights monthly on the St. Louis to Chicago route. Compare the two to find your ideal fare.
What is the best day to buy a plane ticket?
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.
What are the cheapest days to fly?
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.
How far in advance can you book a flight?
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.

Popular Flight Routes from St. Louis (STL)

Travelers at STL love to visit these top cities. Roam to the top destinations from St. Louis (STL) today with the cheap prices from Travelocity!

Popular Flight Routes from Chicago (ORD)

Travelers at ORD love to visit these top cities. Roam to the top destinations from Chicago(ORD) today with the cheap prices from Travelocity!

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.