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 $437 round trip and CA $271 one way. Prices and availability subject to change. Additional terms may apply.

Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $437 Roundtrip, just found
CA $437
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $437 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $451 Roundtrip, just found
CA $451
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $451 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $452 Roundtrip, just found
CA $452
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $452 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $464 Roundtrip, just found
CA $464
Roundtrip
just found
Select Delta flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $464 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $479 Roundtrip, just found
CA $479
Roundtrip
just found
Select Delta flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $479 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $501 Roundtrip, just found
CA $501
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $501 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $510 Roundtrip, just found
CA $510
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $510 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $515 Roundtrip, just found
CA $515
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $515 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $517 Roundtrip, just found
CA $517
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $517 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $520 Roundtrip, just found
CA $520
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $520 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $526 Roundtrip, just found
CA $526
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $526 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $533 Roundtrip, just found
CA $533
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $533 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $535 Roundtrip, just found
CA $535
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $535 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $547 Roundtrip, just found
CA $547
Roundtrip
just found
Select Delta flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $547 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $552 Roundtrip, just found
CA $552
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $552 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $562 Roundtrip, just found
CA $562
Roundtrip
just found
Select Delta flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $562 just found
Fri, Feb 20 - Sun, Mar 8
STL
St. Louis
ORD
Chicago
CA $566 Roundtrip, just found
CA $566
Roundtrip
just found
Select American Airlines flight, departing Fri, Feb 20 from St. Louis to Chicago, returning Sun, Mar 8, priced at CA $566 just found

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.