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$70+ 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 5/19. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — STL
Apr 21 — Apr 281
Tue 4/21
Tue 4/28
1 adult, Economy
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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”

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Cheapflights Tip: The best prices from Detroit All airports to Lambert-St Louis are usually found in August or July, booked 44 days in advance, depart on a Thursday or Friday and return on a Friday

Cheap flight deals from Detroit to St. Louis

Cheapest flights from Detroit to St. Louis
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 March 22, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Tue 4/217:04 pm
DTW
-
STL
1 stop12h 46m
Frontier
Wed 4/228:23 pm
STL
-
DTW
1 stop11h 42m
Frontier
Deal found 3/18$134
This Expedia deal was found by Cheapflights users on 3/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1311:48 am
DTW
-
STL
1 stop12h 37m
Frontier
Thu 4/1611:25 am
STL
-
DTW
1 stop6h 21m
Frontier
Deal found 3/21$140
This Kiwi.com deal was found by Cheapflights users on 3/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2812:33 pm
DTW
-
STL
1 stop19h 17m
Frontier
Wed 4/298:23 pm
STL
-
DTW
1 stop11h 42m
Frontier
Deal found 3/19$145
This Kiwi.com deal was found by Cheapflights users on 3/21. 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.
Tue 4/217:04 pm
DTW
-
STL
1 stop12h 46m
Frontier
Thu 4/2311:25 am
STL
-
DTW
1 stop6h 21m
Frontier
Deal found 3/21$154
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Tue 4/217:04 pm
DTW
-
STL
1 stop12h 46m
Frontier
Sat 4/258:17 pm
STL
-
DTW
1 stop13h 41m
Frontier
Deal found 3/18$169
This Kiwi.com deal was found by Cheapflights users on 3/20. 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.
Thu 4/168:43 pm
DTW
-
STL
1 stop11h 07m
Frontier
Mon 4/208:23 pm
STL
-
DTW
1 stop14h 15m
Frontier
Deal found 3/20$171
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Tue 4/217:04 pm
DTW
-
STL
1 stop12h 46m
Frontier
Fri 4/248:23 pm
STL
-
DTW
1 stop14h 22m
Frontier
Deal found 3/17$172
This Kiwi.com deal was found by Cheapflights users on 3/18. 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.
Sun 4/195:09 pm
DTW
-
STL
1 stop14h 41m
Frontier
Wed 4/228:23 pm
STL
-
DTW
1 stop11h 42m
Frontier
Deal found 3/18$177
This Travelocity deal was found by Cheapflights users on 3/20. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:50 pm
DTW
-
STL
1 stop8h 29m
Frontier
Wed 4/158:23 pm
STL
-
DTW
1 stop11h 42m
Frontier
Deal found 3/20$181
This Kiwi.com deal was found by Cheapflights users on 3/17. 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.
Fri 5/18:49 pm
DTW
-
STL
1 stop11h 01m
Frontier
Fri 5/85:27 pm
STL
-
DTW
1 stop19h 15m
Frontier
Deal found 3/17$183

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 March 22, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$134
(Kiwi.com)

One-way from

$70
(Kiwi.com)

Popular in

February

Cheapest in

August

Average price

$339

Good round-trip deal

$339 or less

Good one-way deal

$202 or less
Provider with most accurate pricing for Detroit (DTT)-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Detroit (DTT)-Lambert-St Louis flights.
Search Deals
From Detroit (DTT) to Lambert-St Louis
Search Deals
One-way flight from Detroit (DTT) to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Detroit (DTT) to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Detroit (DTT) to Lambert-St Louis.
Search Deals

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 2,558,603 searches. Data last updated March 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

Price

Cheapest round-trip

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Tue 5/5

7:10 pm-7:55 pm

Nonstop1h 45m

Lambert-St Louis

Tue 5/19

3:55 pm-8:15 pm

1 stop3h 20m

$207

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Wed 4/8

6:35 am-1:00 pm

2 stops7h 25m

Lambert-St Louis

Mon 4/13

1:45 pm-10:20 pm

2 stops7h 35m

$235

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Wed 4/8

8:10 pm-11:11 pm

1 stop4h 01m

Lambert-St Louis

Sat 4/11

9:16 am-6:48 pm

2 stops8h 32m

$290

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Wed 4/15

12:11 pm-9:13 pm

2 stops10h 02m

Lambert-St Louis

Wed 4/22

7:45 am-3:22 pm

1 stop6h 37m

$300

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 6/4

1:25 pm-9:00 pm

2 stops8h 35m

Lambert-St Louis

Sun 6/7

5:50 am-2:45 pm

2 stops7h 55m

$306

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Tue 7/21

4:10 pm-4:49 pm

Nonstop1h 39m

Lambert-St Louis

Tue 7/28

2:18 pm-4:49 pm

Nonstop1h 31m

$339

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Sat 4/25

4:00 pm-4:42 pm

Nonstop1h 42m

Lambert-St Louis

Mon 4/27

1:46 pm-4:22 pm

Nonstop1h 36m

$339
Quickest round-trip

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Wed 7/1

7:05 am-7:40 am

Nonstop1h 35m

Lambert-St Louis

Mon 7/6

7:55 pm-10:25 pm

Nonstop1h 30m

$339

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Tue 7/28

5:25 pm-11:55 pm

1 stop7h 30m

Lambert-St Louis

Fri 7/31

9:55 am-12:25 pm

Nonstop1h 30m

$349
Cheapest one-way

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Sat 5/16

3:40 pm-4:20 pm

Nonstop1h 40m

$107

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

Showing 1-10 of 21 resultsSorted by cheapest first
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2
3

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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

How far ahead should I book a flight from Detroit to St. Louis?

Use this chart to determine the optimal time to book a round-trip flight from Detroit to St. Louis. Price data was last updated on March 13, 2026.

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 42 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 $39). Flying from Detroit to St. Louis in January is currently the most expensive (average of $253). 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 March 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 20% versus a flight in the evening.

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 March 14, 2026.

Travelers seeking maximum savings on their Detroit to St. Louis flight should consider departing on Friday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 March 22, 2026.

The most flights from DTT to STL are scheduled on a Monday (14 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (12 on average).

How much does it cost to fly round-trip from Detroit to St. Louis?

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 March 22, 2026.
See what other customers who have flown with Southwest,Delta, andSpirit Airlines 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.
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,324 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,314 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Spirit Airlines
6.3
Okay
8,531 reviews
Southwest
8.0
Very good
4,324 reviews

Boarding

8.1

Food

7.0

Entertainment

7.5

Crew

8.6

Overall

8.0

Comfort

8.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

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.

  • What airports do I use to fly from Detroit to St. Louis?

    You will need to book a flight from Detroit All airports to Lambert-St Louis if you want to fly from Detroit to St. Louis. At least 4 different airlines have flights from All airports (DTT) to Lambert-St Louis (STL) on a regular basis. There are 13 flights to St. Louis from the Detroit airport per day. If you manage to book one that is nonstop, then you can expect the flight time from DTT to STL to be around 1h 35m.

  • How long is the flight from Detroit to St. Louis?

    A quick flight from Detroit to St. Louis can take about 1h 45m. Southwest provides one of the quickest options available for as low as $207. The distance from Detroit to St. Louis is about 439 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Detroit to St. Louis round-trip?

    Our cheapest airline available from Detroit to St. Louis is Spirit Airlines. Our recent data shows that you can find tickets from as low as $28 on this airline. Additional options worth looking into are Frontier and Delta, starting at $111 and $120 round-trip. You may be able to fly from Detroit to St. Louis for 89% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Detroit to St. Louis one-way?

    $36 is the cheapest one-way deal found within the past few days, from Spirit Airlines. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $60 and $69, respectively.

  • What are the most reliable airlines from Detroit to St. Louis?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Detroit to St. Louis on time: Air France (88%), KLM (78%), Southwest (78%).

  • What are the cheapest flights from Detroit to St. Louis?

    While on average a flight from Detroit to St. Louis is generally $453, our data shows the cheapest flight currently is $154. When looking at the most popular route, (Detroit Metropolitan Wayne County - Lambert-St Louis), you can expect to pay $186 for that flight.

  • Can I find deals for flights from Detroit to St. Louis that include hotel bookings?

    Yes. In addition to deals on Detroit to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Detroit to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Detroit to St. Louis.

  • Can I find deals for business class flights from Detroit to St. Louis?

    Yes. Cheapflights offers flight deals from Detroit to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 $39). Flying from Detroit to St. Louis in January is currently the most expensive (average of $253). 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.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 4 airlines flying from Detroit to St. Louis

Discover the top 4 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 2,558,603 searches. Data last updated March 22, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$28Average$88FlexibilityNo cancel feeOn-time65%
FrontierCheapest$111Average$229FlexibilityNo cancel feeOn-time62%
DeltaCheapest$120Average$334FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$121Average$310FlexibilityNo cancel feeOn-time63%

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