Flights from Alton

Cheapest flights from Alton

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.

Sat, Sep 27 - Sat, Oct 4

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$98 Roundtrip, found 6 days ago

$98

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Sat, Sep 27 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Oct 4, priced at $98 found 6 days ago

Tue, Oct 21 - Wed, Oct 22

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$103 Roundtrip, found 21 hours ago

$103

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Tue, Oct 21 from Lambert-St. Louis Intl. to Denver Intl., returning Wed, Oct 22, priced at $103 found 21 hours ago

Tue, Oct 21 - Fri, Oct 24

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$104 Roundtrip, found 21 hours ago

$104

Roundtrip

found 21 hours ago

Select Frontier Airlines flight, departing Tue, Oct 21 from Lambert-St. Louis Intl. to Denver Intl., returning Fri, Oct 24, priced at $104 found 21 hours ago

Wed, Oct 1 - Sat, Oct 4

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$113 Roundtrip, found 6 days ago

$113

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Wed, Oct 1 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Oct 4, priced at $113 found 6 days ago

Fri, Sep 26 - Sat, Oct 4

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$118 Roundtrip, found 6 days ago

$118

Roundtrip

found 6 days ago

Select Frontier Airlines flight, departing Fri, Sep 26 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Oct 4, priced at $118 found 6 days ago

Fri, Oct 31 - Sat, Nov 1

STL

Lambert-St. Louis Intl.

LAS

Harry Reid Intl.

$119 Roundtrip, found 2 days ago

$119

Roundtrip

found 2 days ago

Select Frontier Airlines flight, departing Fri, Oct 31 from Lambert-St. Louis Intl. to Harry Reid Intl., returning Sat, Nov 1, priced at $119 found 2 days ago

Thu, Sep 4 - Thu, Sep 11

STL

Lambert-St. Louis Intl.

DFW

Dallas-Fort Worth Intl.

$134 Roundtrip, found 5 days ago

$134

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Thu, Sep 4 from Lambert-St. Louis Intl. to Dallas-Fort Worth Intl., returning Thu, Sep 11, priced at $134 found 5 days ago

Sat, Oct 18 - Sat, Oct 25

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$157 Roundtrip, found 21 hours ago

$157

Roundtrip

found 21 hours ago

Select United flight, departing Sat, Oct 18 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Oct 25, priced at $157 found 21 hours ago

Thu, Oct 2 - Sun, Oct 5

STL

Lambert-St. Louis Intl.

PHX

Sky Harbor Intl.

$163 Roundtrip, found 4 days ago

$163

Roundtrip

found 4 days ago

Select Frontier Airlines flight, departing Thu, Oct 2 from Lambert-St. Louis Intl. to Sky Harbor Intl., returning Sun, Oct 5, priced at $163 found 4 days ago

Sun, Sep 14 - Sun, Sep 21

STL

Lambert-St. Louis Intl.

MCO

Orlando Intl.

$163 Roundtrip, found 5 days ago

$163

Roundtrip

found 5 days ago

Select Frontier Airlines flight, departing Sun, Sep 14 from Lambert-St. Louis Intl. to Orlando Intl., returning Sun, Sep 21, priced at $163 found 5 days ago

Thu, Sep 18 - Wed, Sep 24

STL

Lambert-St. Louis Intl.

MCO

Orlando Intl.

$173 Roundtrip, found 5 days ago

$173

Roundtrip

found 5 days ago

Select Spirit Airlines flight, departing Thu, Sep 18 from Lambert-St. Louis Intl. to Orlando Intl., returning Wed, Sep 24, priced at $173 found 5 days ago

Tue, Nov 4 - Wed, Nov 12

STL

Lambert-St. Louis Intl.

TPA

Tampa Intl.

$185 Roundtrip, found 1 day ago

$185

Roundtrip

found 1 day ago

Select Spirit Airlines flight, departing Tue, Nov 4 from Lambert-St. Louis Intl. to Tampa Intl., returning Wed, Nov 12, priced at $185 found 1 day ago

Sat, Sep 27 - Sat, Oct 4

STL

Lambert-St. Louis Intl.

DEN

Denver Intl.

$187 Roundtrip, found 6 days ago

$187

Roundtrip

found 6 days ago

Select American Airlines flight, departing Sat, Sep 27 from Lambert-St. Louis Intl. to Denver Intl., returning Sat, Oct 4, priced at $187 found 6 days ago

Sat, Nov 8 - Sat, Nov 8

STL

Lambert-St. Louis Intl.

TPA

Tampa Intl.

$191 Roundtrip, found 1 day ago

$191

Roundtrip

found 1 day ago

Select Delta flight, departing Sat, Nov 8 from Lambert-St. Louis Intl. to Tampa Intl., returning Sat, Nov 8, priced at $191 found 1 day ago

Sat, Oct 25 - Tue, Nov 4

STL

Lambert-St. Louis Intl.

DAL

Love Field

$197 Roundtrip, just found

$197

Roundtrip

just found

Select Delta flight, departing Sat, Oct 25 from Lambert-St. Louis Intl. to Love Field, returning Tue, Nov 4, priced at $197 just found

Tue, Dec 9 - Tue, Dec 16

STL

Lambert-St. Louis Intl.

MIA

Miami Intl.

$197 Roundtrip, found 4 days ago

$197

Roundtrip

found 4 days ago

Select Delta flight, departing Tue, Dec 9 from Lambert-St. Louis Intl. to Miami Intl., returning Tue, Dec 16, priced at $197 found 4 days ago

Wed, Sep 24 - Sat, Sep 27

STL

Lambert-St. Louis Intl.

SAN

San Diego Intl.

$228 Roundtrip, found 17 hours ago

$228

Roundtrip

found 17 hours ago

Select Frontier Airlines flight, departing Wed, Sep 24 from Lambert-St. Louis Intl. to San Diego Intl., returning Sat, Sep 27, priced at $228 found 17 hours ago

Tue, Oct 14 - Wed, Oct 15

STL

Lambert-St. Louis Intl.

RSW

Southwest Florida Intl.

$267 Roundtrip, found 2 days ago

$267

Roundtrip

found 2 days ago

Select Delta flight, departing Tue, Oct 14 from Lambert-St. Louis Intl. to Southwest Florida Intl., returning Wed, Oct 15, priced at $267 found 2 days ago

Tue, Sep 30 - Wed, Oct 1

STL

Lambert-St. Louis Intl.

LAS

Harry Reid Intl.

$318 Roundtrip, found 3 days ago

$318

Roundtrip

found 3 days ago

Select Alaska Airlines flight, departing Tue, Sep 30 from Lambert-St. Louis Intl. to Harry Reid Intl., returning Wed, Oct 1, priced at $318 found 3 days ago

Tue, Oct 21 - Thu, Oct 23

STL

Lambert-St. Louis Intl.

LAS

Harry Reid Intl.

$332 Roundtrip, found 2 days ago

$332

Roundtrip

found 2 days ago

Select Hawaiian Airlines flight, departing Tue, Oct 21 from Lambert-St. Louis Intl. to Harry Reid Intl., returning Thu, Oct 23, priced at $332 found 2 days ago