Flights from Illinois

Cheapest flights from Illinois

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.

Wed, Aug 12 - Sun, Aug 23

STL

Lambert-St. Louis Intl.

ATL

Hartsfield-Jackson Atlanta Intl.

$66 Roundtrip, found 3 days ago

$66

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Wed, Aug 12 from Lambert-St. Louis Intl. to Hartsfield-Jackson Atlanta Intl., returning Sun, Aug 23, priced at $66 found 3 days ago

Sun, Sep 6 - Thu, Sep 10

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$108 Roundtrip, found 3 days ago

$108

Roundtrip

found 3 days ago

Select Frontier Airlines flight, departing Sun, Sep 6 from Lambert-St. Louis Intl. to Denver Intl., returning Thu, Sep 10, priced at $108 found 3 days ago

Sat, Sep 5 - Thu, Sep 10

ORD

O'Hare Intl.

ATL

Hartsfield-Jackson Atlanta Intl.

$114 Roundtrip, found 4 days ago

$114

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sat, Sep 5 from O'Hare Intl. to Hartsfield-Jackson Atlanta Intl., returning Thu, Sep 10, priced at $114 found 4 days ago

Tue, Aug 18 - Tue, Sep 1

STL

Lambert-St. Louis Intl.

DFW

Dallas-Fort Worth Intl.

$118 Roundtrip, found 1 hour ago

$118

Roundtrip

found 1 hour ago

Select Frontier Airlines flight, departing Tue, Aug 18 from Lambert-St. Louis Intl. to Dallas-Fort Worth Intl., returning Tue, Sep 1, priced at $118 found 1 hour ago

Sat, Aug 29 - Wed, Sep 2

ORD

O'Hare Intl.

FLL

Fort Lauderdale - Hollywood Intl.

$119 Roundtrip, found 2 days ago

$119

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Sat, Aug 29 from O'Hare Intl. to Fort Lauderdale - Hollywood Intl., returning Wed, Sep 2, priced at $119 found 2 days ago

Tue, Sep 15 - Mon, Oct 5

ORD

O'Hare Intl.

DEN

Denver Intl.

$126 Roundtrip, found 1 day ago

$126

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Sep 15 from O'Hare Intl. to Denver Intl., returning Mon, Oct 5, priced at $126 found 1 day ago

Tue, Nov 3 - Wed, Nov 18

ORD

O'Hare Intl.

MCO

Orlando Intl.

$158 Roundtrip, found 6 hours ago

$158

Roundtrip

found 6 hours ago

Select Frontier Airlines flight, departing Tue, Nov 3 from O'Hare Intl. to Orlando Intl., returning Wed, Nov 18, priced at $158 found 6 hours ago

Sun, Aug 23 - Tue, Aug 25

ORD

O'Hare Intl.

LAX

Los Angeles Intl.

$164 Roundtrip, found 4 days ago

$164

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Sun, Aug 23 from O'Hare Intl. to Los Angeles Intl., returning Tue, Aug 25, priced at $164 found 4 days ago

Mon, Oct 26 - Thu, Oct 29

ORD

O'Hare Intl.

PHX

Sky Harbor Intl.

$164 Roundtrip, found 16 hours ago

$164

Roundtrip

found 16 hours ago

Select Frontier Airlines flight, departing Mon, Oct 26 from O'Hare Intl. to Sky Harbor Intl., returning Thu, Oct 29, priced at $164 found 16 hours ago

Thu, Oct 29 - Tue, Nov 17

ORD

O'Hare Intl.

TPA

Tampa Intl.

$170 Roundtrip, found 2 days ago

$170

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Thu, Oct 29 from O'Hare Intl. to Tampa Intl., returning Tue, Nov 17, priced at $170 found 2 days ago

Wed, Sep 16 - Tue, Sep 29

ORD

O'Hare Intl.

MIA

Miami Intl.

$171 Roundtrip, found 2 hours ago

$171

Roundtrip

found 2 hours ago

Select American Airlines flight, departing Wed, Sep 16 from O'Hare Intl. to Miami Intl., returning Tue, Sep 29, priced at $171 found 2 hours ago

Tue, Sep 15 - Tue, Sep 22

MDW

Midway Intl.

MIA

Miami Intl.

$171 Roundtrip, found 2 days ago

$171

Roundtrip

found 2 days ago

Select Southwest Airlines flight, departing Tue, Sep 15 from Midway Intl. to Miami Intl., returning Tue, Sep 22, priced at $171 found 2 days ago

Wed, Oct 14 - Wed, Oct 21

MDW

Midway Intl.

FLL

Fort Lauderdale - Hollywood Intl.

$171 Roundtrip, found 1 day ago

$171

Roundtrip

found 1 day ago

Select Southwest Airlines flight, departing Wed, Oct 14 from Midway Intl. to Fort Lauderdale - Hollywood Intl., returning Wed, Oct 21, priced at $171 found 1 day ago

Tue, Sep 15 - Tue, Oct 20

MDW

Midway Intl.

ATL

Hartsfield-Jackson Atlanta Intl.

$172 Roundtrip, found 1 day ago

$172

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Tue, Sep 15 from Midway Intl. to Hartsfield-Jackson Atlanta Intl., returning Tue, Oct 20, priced at $172 found 1 day ago

Sat, Oct 3 - Wed, Oct 7

ORD

O'Hare Intl.

LAS

Harry Reid Intl.

$196 Roundtrip, found 1 day ago

$196

Roundtrip

found 1 day ago

Select Frontier Airlines flight, departing Sat, Oct 3 from O'Hare Intl. to Harry Reid Intl., returning Wed, Oct 7, priced at $196 found 1 day ago

Tue, Aug 18 - Tue, Sep 1

STL

Lambert-St. Louis Intl.

DAL

Love Field

$197 Roundtrip, found 1 hour ago

$197

Roundtrip

found 1 hour ago

Select Southwest Airlines flight, departing Tue, Aug 18 from Lambert-St. Louis Intl. to Love Field, returning Tue, Sep 1, priced at $197 found 1 hour ago

Mon, Aug 31 - Thu, Sep 3

STL

Lambert-St. Louis Intl.

MCO

Orlando Intl.

$198 Roundtrip, found 15 hours ago

$198

Roundtrip

found 15 hours ago

Select Frontier Airlines flight, departing Mon, Aug 31 from Lambert-St. Louis Intl. to Orlando Intl., returning Thu, Sep 3, priced at $198 found 15 hours ago

Tue, Oct 13 - Thu, Oct 15

MDW

Midway Intl.

TPA

Tampa Intl.

$209 Roundtrip, found 1 day ago

$209

Roundtrip

found 1 day ago

Select Southwest Airlines flight, departing Tue, Oct 13 from Midway Intl. to Tampa Intl., returning Thu, Oct 15, priced at $209 found 1 day ago

Tue, Aug 25 - Wed, Aug 26

ORD

O'Hare Intl.

DFW

Dallas-Fort Worth Intl.

$218 Roundtrip, found 14 hours ago

$218

Roundtrip

found 14 hours ago

Select Frontier Airlines flight, departing Tue, Aug 25 from O'Hare Intl. to Dallas-Fort Worth Intl., returning Wed, Aug 26, priced at $218 found 14 hours ago

Fri, Sep 11 - Tue, Sep 29

MDW

Midway Intl.

DEN

Denver Intl.

$236 Roundtrip, found 4 days ago

$236

Roundtrip

found 4 days ago

Select Delta flight, departing Fri, Sep 11 from Midway Intl. to Denver Intl., returning Tue, Sep 29, priced at $236 found 4 days ago