$84+ Cheap flights from Detroit to St. Louis (DTT - STL)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — STL
Sep 21 — Sep 281
Round-trip
1 adult, Economy
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Find cheap flights from Detroit to St. Louis with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Detroit to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Detroit to St. LouisExplore the most affordable flight options available from Detroit to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 22, 2026.
Explore the most affordable flight options available from Detroit to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 22, 2026.
This Southwest deal was found by Cheapflights users on 8/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:25 am -
Nonstop1h 35m
Sat 9/2610:15 am -
Nonstop1h 30m
Deal found 8/20![Southwest logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/43:34 pm -
1 stop19h 06m
Mon 11/910:35 am -
1 stop13h 07m
Deal found 8/18![Frontier logo]()
$169
This United Airlines deal was found by Cheapflights users on 8/21. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/39:02 am -
1 stop4h 12m
Sat 10/34:50 pm -
1 stop5h 54m
Deal found 8/21![United Airlines logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am -
1 stop7h 10m
Mon 9/282:29 pm -
1 stop20h 36m
Deal found 8/20![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:25 am -
1 stop12h 15m
Mon 11/96:44 pm -
1 stop18h 55m
Deal found 8/20![Frontier logo]()
$176
This Southwest deal was found by Cheapflights users on 8/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:25 am -
Nonstop1h 35m
Wed 9/1611:10 am -
Nonstop1h 30m
Deal found 8/18![Southwest logo]()
$177
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:30 am -
1 stop10h 20m
Wed 9/162:29 pm -
1 stop9h 13m
Deal found 8/17![Frontier logo]()
$178
This Frontier deal was found by Cheapflights users on 8/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:35 pm -
1 stop23h 42m
Mon 9/142:29 pm -
1 stop9h 13m
Deal found 8/18![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/43:34 pm -
1 stop19h 06m
Tue 11/1010:35 am -
1 stop27h 04m
Deal found 8/18![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am -
1 stop7h 10m
Fri 9/252:29 pm -
1 stop20h 22m
Deal found 8/20![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/293:34 pm -
1 stop19h 06m
Sun 11/110:35 am -
1 stop13h 07m
Deal found 8/17![Frontier logo]()
$184
Best flights from Detroit to St. LouisDiscover carefully curated flight deals from Detroit to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 22, 2026.
Discover carefully curated flight deals from Detroit to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 22, 2026.
This Southwest deal was found by Cheapflights users on 8/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/286:55 am -
Nonstop1h 50m
Wed 9/3011:10 am -
Nonstop1h 30m
Deal found 8/19![Southwest logo]()
$217
This Delta deal was found by Cheapflights users on 8/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/128:05 pm -
Nonstop1h 46m
Tue 11/177:18 pm -
1 stop4h 41m
Deal found 8/21![Delta logo]()
$267
This Southwest deal was found by Cheapflights users on 8/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/185:00 pm -
1 stop6h 00m
Sat 9/197:50 am -
2 stops8h 55m
Deal found 8/20![Southwest logo]()
$242
This Delta deal was found by Cheapflights users on 8/22. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/137:58 pm -
1 stop4h 25m
Tue 11/175:30 pm -
1 stop4h 25m
Deal found 8/22![Delta logo]()
$282
This Southwest deal was found by Cheapflights users on 8/21. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:25 pm -
Nonstop1h 35m
Mon 10/57:50 pm -
Nonstop1h 30m
Deal found 8/21![Southwest logo]()
$262
This Delta deal was found by Cheapflights users on 8/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:05 am -
1 stop4h 29m
Sun 9/136:40 am -
Nonstop1h 33m
Deal found 8/21![Delta logo]()
$292
This Southwest deal was found by Cheapflights users on 8/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/107:30 pm -
1 stop3h 40m
Sat 9/1210:15 am -
Nonstop1h 30m
Deal found 8/18![Southwest logo]()
$267
This Southwest deal was found by Cheapflights users on 8/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/172:40 pm -
Nonstop1h 30m
Thu 10/111:40 am -
1 stop3h 40m
Deal found 8/20![Southwest logo]()
$267
This Southwest deal was found by Cheapflights users on 8/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/246:55 am -
Nonstop1h 50m
Fri 9/252:45 pm -
2 stops6h 35m
Deal found 8/18![Southwest logo]()
$277
Last-minute flights from Detroit to St. LouisDiscover last-minute flight deals from Detroit to St. Louis. Data last updated August 22, 2026 and is based on user searches.
Discover last-minute flight deals from Detroit to St. Louis. Data last updated August 22, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/88:30 am -
1 stop10h 20m
Wed 9/162:29 pm -
1 stop9h 13m
Deal found 8/17![Frontier logo]()
$178
This Frontier deal was found by Cheapflights users on 8/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/108:35 pm -
1 stop23h 42m
Mon 9/142:29 pm -
1 stop9h 13m
Deal found 8/18![Frontier logo]()
$179
This CheapOair deal was found by Cheapflights users on 8/17. 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.
Thu 9/108:57 pm -
1 stop20h 37m
Sat 9/1212:17 pm -
1 stop15h 38m
Deal found 8/17![Frontier logo]()
$188
This Southwest deal was found by Cheapflights users on 8/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:25 am -
Nonstop1h 35m
Wed 9/1611:10 am -
Nonstop1h 30m
Deal found 8/18![Southwest logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:08 am -
1 stop13h 09m
Mon 9/282:29 pm -
1 stop9h 13m
Deal found 8/20![Frontier logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am -
1 stop7h 10m
Mon 9/282:29 pm -
1 stop20h 36m
Deal found 8/20![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am -
1 stop7h 10m
Fri 9/252:29 pm -
1 stop20h 22m
Deal found 8/20![Frontier logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am -
1 stop7h 10m
Wed 9/232:29 pm -
1 stop9h 13m
Deal found 8/20![Frontier logo]()
$191
This Southwest deal was found by Cheapflights users on 8/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:25 am -
Nonstop1h 35m
Sat 9/2610:15 am -
Nonstop1h 30m
Deal found 8/20![Southwest logo]()
$167
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:00 am -
1 stop7h 10m
Mon 9/282:29 pm -
1 stop20h 36m
Deal found 8/20![Frontier logo]()
$189
One-way flights from Detroit to St. LouisSearch for one-way flight options from Detroit to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 22, 2026.
Search for one-way flight options from Detroit to St. Louis. Find affordable one-way fares based on user searches. Data last updated August 22, 2026.
This Southwest deal was found by Cheapflights users on 8/20. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:25 am -
Nonstop1h 35m
Deal found 8/20![Southwest logo]()
$84
This Kiwi.com deal was found by Cheapflights users on 8/17. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/283:34 pm -
1 stop19h 06m
Deal found 8/17![Frontier logo]()
$85
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:08 am -
1 stop12h 49m
Deal found 8/21![Frontier logo]()
$86
This Trip.com deal was found by Cheapflights users on 8/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:00 am -
1 stop7h 10m
Deal found 8/17![Frontier logo]()
$87
This Trip.com deal was found by Cheapflights users on 8/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/26:25 am -
1 stop12h 15m
Deal found 8/20![Frontier logo]()
$88
This Southwest deal was found by Cheapflights users on 8/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:25 am -
Nonstop1h 35m
Deal found 8/18![Southwest logo]()
$89
This CheapOair deal was found by Cheapflights users on 8/19. 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 9/237:00 am -
1 stop7h 10m
Deal found 8/19![Frontier logo]()
$90
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/217:00 am -
1 stop7h 10m
Deal found 8/20![Frontier logo]()
$91
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:00 am -
1 stop7h 10m
Deal found 8/21![Frontier logo]()
$92
This Trip.com deal was found by Cheapflights users on 8/20. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/257:00 am -
1 stop7h 10m
Deal found 8/20![Frontier logo]()
$93
This Frontier deal was found by Cheapflights users on 8/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:08 am -
1 stop13h 09m
Deal found 8/17![Frontier logo]()
$95
Find flight deals from Detroit to St. Louis
Discover tips and strategies to find the most affordable flight options for your journey from Detroit (DTT) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $167 (Southwest) |
One-way from | $84 (Southwest) |
Popular in | February |
Cheapest in | January |
Average price | $300 |
Good round-trip deal | $330 or less |
Good one-way deal | $194 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Detroit to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 22, 2026.
Use the filters below to find and compare flights from Detroit to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Mon 9/28
6:55 am-7:45 am
Nonstop1h 50m
Lambert-St Louis
Wed 9/30
11:10 am-1:40 pm
Nonstop1h 30m
$217
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Fri 9/18
5:00 pm-10:00 pm
1 stop6h 00m
Lambert-St Louis
Sat 9/19
7:50 am-5:45 pm
2 stops8h 55m
$242
Quickest round-trip
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Fri 10/2
8:25 pm-9:00 pm
Nonstop1h 35m
Lambert-St Louis
Mon 10/5
7:50 pm-10:20 pm
Nonstop1h 30m
$262
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Thu 11/12
8:05 pm-8:51 pm
Nonstop1h 46m
Lambert-St Louis
Tue 11/17
7:18 pm-12:59 am
1 stop4h 41m
$267
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Thu 9/10
7:30 pm-10:10 pm
1 stop3h 40m
Lambert-St Louis
Sat 9/12
10:15 am-12:45 pm
Nonstop1h 30m
$267
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Thu 9/17
2:40 pm-3:10 pm
Nonstop1h 30m
Lambert-St Louis
Thu 10/1
11:40 am-4:20 pm
1 stop3h 40m
$267
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Thu 9/24
6:55 am-7:45 am
Nonstop1h 50m
Lambert-St Louis
Fri 9/25
2:45 pm-10:20 pm
2 stops6h 35m
$277
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Fri 11/13
7:58 pm-11:23 pm
1 stop4h 25m
Lambert-St Louis
Tue 11/17
5:30 pm-10:55 pm
1 stop4h 25m
$282
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Sat 9/12
7:05 am-10:34 am
1 stop4h 29m
Lambert-St Louis
Sun 9/13
6:40 am-9:13 am
Nonstop1h 33m
$292
Cheapest one-way
Quickest one-way
DetroitSt. Louis
DTW Detroit Metropolitan Wayne County - STL Lambert-St Louis
DTWSTL
Detroit Metropolitan Wayne County
Tue 9/22
6:25 am-7:00 am
Nonstop1h 35m
$84
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Detroit to St. Louis
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Detroit to St. Louis in August.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Detroit-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Detroit-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Detroit-St. Louis flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Detroit-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Detroit-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Detroit to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Detroit with our price prediction graph.
DTT-STL
DTW-STL
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Detroit to St. Louis
DTT-STL
DTW-STL
What is the cheapest month to book a flight from Detroit to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Detroit to St. Louis (average of $298). Flying from Detroit to St. Louis in April is currently the most expensive (average of $433). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from DTT to STL?
Find hourly flight availability from Detroit to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 22, 2026.
When flying from Detroit to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 22% versus a flight in the morning.
Weekly flight availability from Detroit to St. Louis
Explore weekly flight availability from Detroit to St. Louis. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated August 22, 2026.
The most flights from DTT to STL are scheduled on a Thursday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 on average).
How much does it cost to fly round-trip from Detroit to St. Louis?
Airfare is below average for this route at the moment.
Detroit to St. Louis flights typically cost between $236 and $348 in September.The cheapest round-trip price found within the last 5 days was $167 on Southwest (Sep 22-Sep 26).
How far ahead should I book a flight from Detroit to St. Louis?
The price you pay for your flight from Detroit to St. Louis may vary depending on when you book. For the best chance of a lower fare, look to book 43 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest day to fly from Detroit to St. Louis?
Use this chart to determine the cheapest time to fly round-trip from Detroit to St. Louis. Price data was last updated on August 15, 2026.
Travelers seeking maximum savings on their Detroit to St. Louis flight should consider departing on Tuesday at noon when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated August 22, 2026.
See what other customers who have flown with Southwest,Delta, andFrontier from Detroit to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Crew
8.6
Comfort
8.0
Overall
8.0
Boarding
8.1
Entertainment
7.5
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Related info for your journey
Find useful and relevant information for your journey from Detroit to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
Fairview Heights
O'Fallon
Fenton
Swansea
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Farmington
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Detroit and St. Louis flights
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Top 3 airlines flying from Detroit to St. Louis
Discover the top 3 airlines that operate flights from Detroit to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated August 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$125 | Average$310 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$177 | Average$373 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$205 | Average$350 | FlexibilityNo cancel fee | On-time63% |