Find cheap Frontier flights to St. Louis
ICT — STL
Nov 5 — Nov 121
Round-trip
1 adult, Economy
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Cheapest Frontier flights from USA to St. LouisExplore the most affordable Frontier flight options available from USA to St. Louis. Find the lowest fares with prices last updated on October 6, 2026.
Explore the most affordable Frontier flight options available from USA to St. Louis. Find the lowest fares with prices last updated on October 6, 2026.
This Booking.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:49 pm -
Nonstop1h 53m
Mon 11/236:35 pm -
Nonstop1h 49m
Deal found 10/2![Frontier logo]()
$64
This Cheapflightsfares deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/304:47 pm -
Nonstop1h 53m
Mon 11/26:44 pm -
Nonstop1h 45m
Deal found 10/1![Frontier logo]()
$65
This Cheapflightsfares deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:49 pm -
Nonstop1h 53m
Wed 11/186:34 pm -
Nonstop1h 50m
Deal found 10/5![Frontier logo]()
$66
Best Frontier flights from USA to St. LouisDiscover carefully curated Frontier flight deals from USA to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 6, 2026.
Discover carefully curated Frontier flight deals from USA to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 6, 2026.
This Expedia deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/129:24 am -
1 stop14h 52m
Fri 11/136:34 pm -
Nonstop1h 50m
Deal found 10/1![Frontier logo]()
$109
This Priceline deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:47 pm -
Nonstop1h 53m
Mon 11/26:44 pm -
Nonstop1h 45m
Deal found 10/2![Frontier logo]()
$118
This Cheapflightsfares deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/77:09 pm -
1 stop6h 03m
Tue 12/86:13 pm -
1 stop14h 01m
Deal found 10/1![Frontier logo]()
$136
Direct Frontier flights from USA to St. LouisExplore non-stop Frontier flight options from USA to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated October 6, 2026.
Explore non-stop Frontier flight options from USA to St. Louis based on user searches, and compare prices and availability for your desired travel dates. Data last updated October 6, 2026.
This Booking.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:49 pm -
Nonstop1h 53m
Mon 11/236:35 pm -
Nonstop1h 49m
Deal found 10/2![Frontier logo]()
$64
This Cheapflightsfares deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/304:47 pm -
Nonstop1h 53m
Mon 11/26:44 pm -
Nonstop1h 45m
Deal found 10/1![Frontier logo]()
$65
This Cheapflightsfares deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:49 pm -
Nonstop1h 53m
Wed 11/186:34 pm -
Nonstop1h 50m
Deal found 10/5![Frontier logo]()
$66
Last-minute Frontier flights from USA to St. LouisDiscover last-minute Frontier flight deals from USA to St. Louis. Data last updated October 6, 2026 and is based on user searches.
Discover last-minute Frontier flight deals from USA to St. Louis. Data last updated October 6, 2026 and is based on user searches.
This Booking.com deal was found by Cheapflights users on 10/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:49 pm -
Nonstop1h 53m
Mon 11/236:35 pm -
Nonstop1h 49m
Deal found 10/2![Frontier logo]()
$64
This Cheapflightsfares deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/304:47 pm -
Nonstop1h 53m
Mon 11/26:44 pm -
Nonstop1h 45m
Deal found 10/1![Frontier logo]()
$65
This Cheapflightsfares deal was found by Cheapflights users on 10/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:49 pm -
Nonstop1h 53m
Wed 11/186:34 pm -
Nonstop1h 50m
Deal found 10/5![Frontier logo]()
$66
One-way Frontier flights to St. LouisSearch for one-way Frontier flight options to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 6, 2026.
Search for one-way Frontier flight options to St. Louis. Find affordable one-way fares based on user searches. Data last updated October 6, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/284:47 pm -
Nonstop1h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$23
This Flightnetwork deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/44:47 pm -
Nonstop1h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$24
This CheapOair deal was found by Cheapflights users on 10/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1812:21 pm -
Nonstop2h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/1![Frontier logo]()
$24
Flights to St. Louis with Frontier at a glance
Find detailed information about Frontier flights from USA to St. Louis. Explore the options provided by Frontier to plan your journey from USA to St. Louis. Data last updated October 6, 2026.
Cheapflights Insights
Find cheap Frontier flights to St. Louis
US0-STL
ATL-STL
DEN-STL
How long is the flight to St. Louis with Frontier?
On average, Frontier flights from the United States to St. Louis take 2 hours 5 minutes. Flights to St. Louis from other popular cities in the United States will vary in length. Below are a few examples of popular routes and their flight times.
Frontier weekly flight availability to St. Louis
The most flights to St. Louis operated by Frontier are scheduled on a Friday (8 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).
When is the best time to book a flight to St. Louis with Frontier?
The best time to book a flight to St. Louis with Frontier is 45 days before departure. On average, fares are higher if you book 1 day before departure.
When is the cheapest time to fly to St. Louis with Frontier?
Users looking for the cheapest Frontier fares to St. Louis should consider flying on Tuesday at noon, when prices are typically cheapest. Budget-minded travellers will want to avoid Wednesday at noon, when prices are usually at their highest.
FAQs about flights to St. Louis with Frontier
Reviews of Frontier
See what Cheapflights users have to say about their Frontier experience.
Overview
Reviews
Frontier
2,550 reviews
Overview
Crew
6.5
Entertainment
4.2
Food
4.5
Comfort
5.4
Boarding
5.8
Recent reviews
2.0
|Sep 2026They charge $25 to check in with an agent and the only other option is to install the app, so I installed it just for this one flight. Then the app didn't find my reservation so they sent me to an agent anyway. The agent was unfriendly and printed my boarding pass without tsa pre check, so I had to go through the standard line. Also the flight was delayed two hours.
8.0
|Sep 2026I was traveling with a lap infant and got to TSA only to be turned around saying that something was wrong with my boarding pass. I went to an agent and said nothing was wrong, printed me a board pass and I had to rejoin the line. The when I get to the ticket counter I found out they changed my family seat even though I purchased it prior. I was told I got a refund so I’ll see
2.0
|Jul 2026Flight was delayed a whole day - no compensation on food or drinks. Gate staff gave an older gentleman a hard time about his confusion and concern regarding the overnight delay.
10.0
|Jul 2026Better Food and there was no entertainment . You guys could provide head phones and wifi for the passengers
2.0
|Jul 2026Flight delayed 3 hours
1 out of 850
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