Flights from Chicago to San Luis

Cheapest flights from Chicago

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.

Fri, Oct 17 - Sun, Oct 19

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$104 Roundtrip, just found

$104

Roundtrip

just found

Select Spirit Airlines flight, departing Fri, Oct 17 from O'Hare Intl. to George Bush Intercontinental, returning Sun, Oct 19, priced at $104 just found

Wed, Oct 15 - Tue, Oct 21

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$114 Roundtrip, just found

$114

Roundtrip

just found

Select Spirit Airlines flight, departing Wed, Oct 15 from O'Hare Intl. to George Bush Intercontinental, returning Tue, Oct 21, priced at $114 just found

Fri, Jul 18 - Sun, Jul 20

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$131 Roundtrip, found 1 day ago

$131

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 18 from O'Hare Intl. to George Bush Intercontinental, returning Sun, Jul 20, priced at $131 found 1 day ago

Sat, Jul 26 - Wed, Aug 6

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$132 Roundtrip, found 1 day ago

$132

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Sat, Jul 26 from O'Hare Intl. to George Bush Intercontinental, returning Wed, Aug 6, priced at $132 found 1 day ago

Wed, Jul 16 - Mon, Jul 28

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$138 Roundtrip, found 1 day ago

$138

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Wed, Jul 16 from O'Hare Intl. to George Bush Intercontinental, returning Mon, Jul 28, priced at $138 found 1 day ago

Fri, Jul 18 - Sun, Jul 20

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$140 Roundtrip, found 1 day ago

$140

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Fri, Jul 18 from O'Hare Intl. to George Bush Intercontinental, returning Sun, Jul 20, priced at $140 found 1 day ago

Fri, Oct 17 - Sun, Oct 19

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$142 Roundtrip, just found

$142

Roundtrip

just found

Select Spirit Airlines flight, departing Fri, Oct 17 from O'Hare Intl. to George Bush Intercontinental, returning Sun, Oct 19, priced at $142 just found

Fri, Jul 18 - Sun, Jul 20

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$145 Roundtrip, found 1 day ago

$145

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Jul 18 from O'Hare Intl. to George Bush Intercontinental, returning Sun, Jul 20, priced at $145 found 1 day ago

Thu, Jul 31 - Thu, Aug 7

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$148 Roundtrip, found 1 day ago

$148

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jul 31 from O'Hare Intl. to George Bush Intercontinental, returning Thu, Aug 7, priced at $148 found 1 day ago

Fri, Aug 1 - Thu, Aug 7

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$150 Roundtrip, found 1 day ago

$150

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Fri, Aug 1 from O'Hare Intl. to George Bush Intercontinental, returning Thu, Aug 7, priced at $150 found 1 day ago

Sun, Oct 19 - Tue, Oct 21

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$152 Roundtrip, just found

$152

Roundtrip

just found

Select Spirit Airlines flight, departing Sun, Oct 19 from O'Hare Intl. to George Bush Intercontinental, returning Tue, Oct 21, priced at $152 just found

Thu, Jul 31 - Sun, Aug 3

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$153 Roundtrip, found 1 day ago

$153

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jul 31 from O'Hare Intl. to George Bush Intercontinental, returning Sun, Aug 3, priced at $153 found 1 day ago

Thu, Jul 17 - Sun, Jul 27

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$154 Roundtrip, found 1 day ago

$154

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jul 17 from O'Hare Intl. to George Bush Intercontinental, returning Sun, Jul 27, priced at $154 found 1 day ago

Thu, Jul 31 - Sat, Aug 2

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$156 Roundtrip, found 1 day ago

$156

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Thu, Jul 31 from O'Hare Intl. to George Bush Intercontinental, returning Sat, Aug 2, priced at $156 found 1 day ago

Tue, Jul 29 - Thu, Jul 31

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$195 Roundtrip, found 1 day ago

$195

Roundtrip

found 1 day ago

Select United flight, departing Tue, Jul 29 from O'Hare Intl. to George Bush Intercontinental, returning Thu, Jul 31, priced at $195 found 1 day ago

Tue, Oct 14 - Tue, Oct 14

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$211 Roundtrip, just found

$211

Roundtrip

just found

Select Delta flight, departing Tue, Oct 14 from O'Hare Intl. to George Bush Intercontinental, returning Tue, Oct 14, priced at $211 just found

Fri, Jul 18 - Sun, Jul 20

ORD

O'Hare Intl.

IAH

George Bush Intercontinental

$213 Roundtrip, found 1 day ago

$213

Roundtrip

found 1 day ago

Select American Airlines flight, departing Fri, Jul 18 from O'Hare Intl. to George Bush Intercontinental, returning Sun, Jul 20, priced at $213 found 1 day ago

Wed, Aug 6 - Tue, Aug 12

MDW

Midway Intl.

IAH

George Bush Intercontinental

$217 Roundtrip, found 3 days ago

$217

Roundtrip

found 3 days ago

Select Delta flight, departing Wed, Aug 6 from Midway Intl. to George Bush Intercontinental, returning Tue, Aug 12, priced at $217 found 3 days ago

Sun, Aug 3 - Sun, Aug 10

ORD

O'Hare Intl.

HOU

William P. Hobby

$305 Roundtrip, found 3 days ago

$305

Roundtrip

found 3 days ago

Select American Airlines flight, departing Sun, Aug 3 from O'Hare Intl. to William P. Hobby, returning Sun, Aug 10, priced at $305 found 3 days ago

Sun, Aug 3 - Sun, Aug 10

MDW

Midway Intl.

HOU

William P. Hobby

$658 Roundtrip, found 3 days ago

$658

Roundtrip

found 3 days ago

Select Delta flight, departing Sun, Aug 3 from Midway Intl. to William P. Hobby, returning Sun, Aug 10, priced at $658 found 3 days ago