Flights from St. Louis to Chicago

Cheapest flights from St. Louis

These prices were available within the past 7 days. Prices quoted are per person, round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 26 - Sat, Aug 30

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$137 Roundtrip, found 4 days ago

$137

Roundtrip

found 4 days ago

Select United flight, departing Tue, Aug 26 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sat, Aug 30, priced at $137 found 4 days ago

Wed, Aug 27 - Sat, Aug 30

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$151 Roundtrip, found 4 days ago

$151

Roundtrip

found 4 days ago

Select American Airlines flight, departing Wed, Aug 27 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sat, Aug 30, priced at $151 found 4 days ago

Tue, Aug 26 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$168 Roundtrip, found 4 days ago

$168

Roundtrip

found 4 days ago

Select American Airlines flight, departing Tue, Aug 26 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $168 found 4 days ago

Thu, Aug 28 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$185 Roundtrip, found 4 days ago

$185

Roundtrip

found 4 days ago

Select Southern Airways Express flight, departing Thu, Aug 28 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $185 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$186 Roundtrip, found 4 days ago

$186

Roundtrip

found 4 days ago

Select Southern Airways Express flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $186 found 4 days ago

Sun, Aug 31 - Sun, Aug 31

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$193 Roundtrip, found 4 days ago

$193

Roundtrip

found 4 days ago

Select United flight, departing Sun, Aug 31 from Lambert-St. Louis Intl. to O'Hare Intl., returning Sun, Aug 31, priced at $193 found 4 days ago

Fri, Aug 29 - Fri, Aug 29

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$199 Roundtrip, found 4 days ago

$199

Roundtrip

found 4 days ago

Select Southern Airways Express flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Fri, Aug 29, priced at $199 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$202 Roundtrip, found 4 days ago

$202

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $202 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$214 Roundtrip, found 4 days ago

$214

Roundtrip

found 4 days ago

Select United flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $214 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$216 Roundtrip, found 4 days ago

$216

Roundtrip

found 4 days ago

Select Southern Airways Express flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $216 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$218 Roundtrip, found 4 days ago

$218

Roundtrip

found 4 days ago

Select United flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $218 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$221 Roundtrip, found 4 days ago

$221

Roundtrip

found 4 days ago

Select Southern Airways Express flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $221 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$228 Roundtrip, found 4 days ago

$228

Roundtrip

found 4 days ago

Select United flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $228 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$232 Roundtrip, found 4 days ago

$232

Roundtrip

found 4 days ago

Select United flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $232 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$238 Roundtrip, found 4 days ago

$238

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $238 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$240 Roundtrip, found 4 days ago

$240

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $240 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$241 Roundtrip, found 4 days ago

$241

Roundtrip

found 4 days ago

Select American Airlines flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $241 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$244 Roundtrip, found 4 days ago

$244

Roundtrip

found 4 days ago

Select United flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $244 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$244 Roundtrip, found 4 days ago

$244

Roundtrip

found 4 days ago

Select United flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $244 found 4 days ago

Fri, Aug 29 - Mon, Sep 1

STL

Lambert-St. Louis Intl.

ORD

O'Hare Intl.

$459 Roundtrip, found 4 days ago

$459

Roundtrip

found 4 days ago

Select Delta flight, departing Fri, Aug 29 from Lambert-St. Louis Intl. to O'Hare Intl., returning Mon, Sep 1, priced at $459 found 4 days ago