$84 Cheap Frontier Airlines flights Houston (IAH) to St. Louis (STL)

View $84 flight on Mon, Aug 25, 2025Opens in a new window

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$84 Cheap Frontier Airlines flights Houston (IAH) to St. Louis (STL)

Prices were available within the past 7 days and start at $84 for one-way flights and $167 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Sep 18 - Mon, Sep 22
IAH
Houston
STL
St. Louis
$167 Roundtrip, found 15 hours ago
$167
Roundtrip
found 15 hours ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Houston to St. Louis, returning Mon, Sep 22, priced at $167 found 15 hours ago
Frontier Airlines
Thu, Sep 4 - Tue, Sep 9
IAH
Houston
STL
St. Louis
$188 Roundtrip, found 4 hours ago
$188
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, Sep 4 from Houston to St. Louis, returning Tue, Sep 9, priced at $188 found 4 hours ago
Frontier Airlines
Thu, Sep 11 - Sun, Sep 14
IAH
Houston
STL
St. Louis
$191 Roundtrip, found 2 days ago
$191
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Thu, Sep 11 from Houston to St. Louis, returning Sun, Sep 14, priced at $191 found 2 days ago
Frontier Airlines
Tue, Aug 12 - Fri, Aug 15
IAH
Houston
STL
St. Louis
$199 Roundtrip, found 19 hours ago
$199
Roundtrip
found 19 hours ago
Select Frontier Airlines flight, departing Tue, Aug 12 from Houston to St. Louis, returning Fri, Aug 15, priced at $199 found 19 hours ago
Frontier Airlines
Thu, Sep 18 - Mon, Sep 22
IAH
Houston
STL
St. Louis
$206 Roundtrip, found 15 hours ago
$206
Roundtrip
found 15 hours ago
Select Frontier Airlines flight, departing Thu, Sep 18 from Houston to St. Louis, returning Mon, Sep 22, priced at $206 found 15 hours ago
Frontier Airlines
Thu, Sep 4 - Sun, Sep 7
IAH
Houston
STL
St. Louis
$208 Roundtrip, found 5 hours ago
$208
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Thu, Sep 4 from Houston to St. Louis, returning Sun, Sep 7, priced at $208 found 5 hours ago
Flights from Houston (IAH) to St. Louis (STL)
Origin airport
George Bush Intercontinental
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, Spirit Airlines, United
Popular airline
American Airlines
Distance
667 mi
Average flight time
2 hours 13 mins

Frequently asked questions

How much is a Frontier Airlines flight from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
Finding cheap one-way Frontier Airlines flights from IAH to STL from $84 on Expedia couldn't be simpler --- just filter by "Price (lowest to highest)." Alternatively, check out our affordable return fares from $167 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAH to STL with Frontier Airlines?
Search for one-way or round-trip flights to St. Louis in January or February. You could find cheaper fares with Frontier Airlines during these off-peak times.
What is the cheapest time to book flights from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL) with Frontier Airlines?
Look for cheap Frontier Airlines flights from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL) one to three months ahead of your departure day. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. Regardless of fare type and journey, the ideal day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Frontier Airlines fly nonstop from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
Simply enter your dates, click search and select the "Nonstop" filter on Expedia to find any direct flights from IAH to STL with Frontier Airlines or another carrier.
What is the earliest Frontier Airlines flight from IAH to STL?
To find the earliest departure from IAH to STL with Frontier Airlines, filter your results by "Early Morning" and "Morning." Choosing an early flight generally means you'll experience fewer cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Frontier Airlines fly into in St. Louis?
Lambert-St. Louis Intl. Airport (STL) is the main St. Louis hub for Frontier Airlines flights from George Bush Intercontinental Airport (IAH).
Why fly with Frontier Airlines from IAH to STL?
With a rewarding loyalty program, Frontier Airlines is a top choice for many travelers departing from IAH to STL. Plus, as a Frontier Miles and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights along with your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Frontier Airlines flight from George Bush Intercontinental Airport (IAH) to Lambert-St. Louis Intl. Airport (STL)?
Changes are typically free within 24 hours of booking, but your airline may add a charge after that. For further details about modifying your reservation, head to your "Trips," select your flight and click on "Manage Booking." If you'd like the freedom to change your plans without extra charges, apply the "Changes included" and "No cancel fee" filters when planning your next getaway.

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*Available to One Key members.