Cheap Flights to Monroe County from $28

View $28 flight on Sat, May 16, 2026Opens in a new window

Popular airlines to Monroe County

  • American Airlines

  • Delta

  • United

  • Southwest Airlines

  • Frontier Airlines

  • Alaska Airlines

  • Air Canada

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How much is the cheapest flight to Monroe County?

Prices were available within the past 7 days and start at $28 for one-way flights and $56 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Sat, Apr 25 - Sat, May 2
DEN
Denver
STL
St. Louis
$56 Roundtrip, found 1 hour ago
$56
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, Apr 25 from Denver to St. Louis, returning Sat, May 2, priced at $56 found 1 hour ago
Frontier Airlines
Wed, Mar 18 - Wed, Mar 25
DEN
Denver
STL
St. Louis
$68 Roundtrip, found 5 hours ago
$68
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Wed, Mar 18 from Denver to St. Louis, returning Wed, Mar 25, priced at $68 found 5 hours ago
Frontier Airlines
Thu, May 7 - Sat, May 9
DEN
Denver
STL
St. Louis
$71 Roundtrip, found 1 hour ago
$71
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, May 7 from Denver to St. Louis, returning Sat, May 9, priced at $71 found 1 hour ago
Frontier Airlines
Thu, Apr 23 - Sat, Apr 25
DEN
Denver
STL
St. Louis
$72 Roundtrip, found 1 hour ago
$72
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Apr 23 from Denver to St. Louis, returning Sat, Apr 25, priced at $72 found 1 hour ago
Frontier Airlines
Mon, Mar 16 - Wed, Mar 18
DEN
Denver
STL
St. Louis
$77 Roundtrip, found 1 hour ago
$77
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Mon, Mar 16 from Denver to St. Louis, returning Wed, Mar 18, priced at $77 found 1 hour ago
Frontier Airlines
Wed, Apr 1 - Wed, Apr 8
DEN
Denver
STL
St. Louis
$78 Roundtrip, found 15 hours ago
$78
Roundtrip
found 15 hours ago
Select Frontier Airlines flight, departing Wed, Apr 1 from Denver to St. Louis, returning Wed, Apr 8, priced at $78 found 15 hours ago
United
Sat, Apr 25 - Sat, May 2
DEN
Denver
STL
St. Louis
$129 Roundtrip, found 1 hour ago
$129
Roundtrip
found 1 hour ago
Select United flight, departing Sat, Apr 25 from Denver to St. Louis, returning Sat, May 2, priced at $129 found 1 hour ago
Southwest Airlines
Wed, Apr 22 - Sat, May 2
DEN
Denver
STL
St. Louis
$178 Roundtrip, found 1 hour ago
$178
Roundtrip
found 1 hour ago
Select Southwest Airlines flight, departing Wed, Apr 22 from Denver to St. Louis, returning Sat, May 2, priced at $178 found 1 hour ago
Alaska Airlines
Fri, Aug 28 - Fri, Sep 11
SEA
Seattle
STL
St. Louis
$189 Roundtrip, just found
$189
Roundtrip
just found
Select Alaska Airlines flight, departing Fri, Aug 28 from Seattle to St. Louis, returning Fri, Sep 11, priced at $189 just found
American Airlines
Wed, Apr 22 - Sat, May 2
DEN
Denver
STL
St. Louis
$204 Roundtrip, found 1 hour ago
$204
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, Apr 22 from Denver to St. Louis, returning Sat, May 2, priced at $204 found 1 hour ago

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Airports in Monroe County

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Flights from $205
STL
Lambert-St. Louis Intl.
Cheapest
Flights from $205

Enjoy extra legroom, flight flexibility, and a seamless travel experience.

*Flight schedules are subject to change.

*Flight schedules are subject to change.

Trending flights to Monroe County

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.

Frontier Airlines
Sat, Apr 25 - Sat, May 2
DEN
Denver
STL
St. Louis
$56 Roundtrip, found 1 hour ago
$56
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Sat, Apr 25 from Denver to St. Louis, returning Sat, May 2, priced at $56 found 1 hour ago
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