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$42+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — STL
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Detroit All airports to Lambert-St Louis are usually found in July or August, booked 33 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap 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 14, 2025.

Round-trip from

$97
(FlightHub)

One-way from

$42
(FlightHub)

Popular in

December

Cheapest in

July

Average price

$148

Good round-trip deal

$118 or less

Good one-way deal

$68 or less
From Detroit (DTT) to Lambert-St Louis
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One-way flight from Detroit (DTT) to Lambert-St Louis
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Highest demand for flights based on searches. 15% potential increase in price ($52 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Detroit (DTT) to Lambert-St Louis.
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Price to beat on a one-way flight from Detroit (DTT) to Lambert-St Louis.
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Find 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 August 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/281:00 pmDTW - STL
Nonstop1h 32mSpirit Airlines
Sun 8/312:30 pmSTL - DTW
Nonstop1h 30mSpirit Airlines
Deal found 8/12$86
This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/291:00 pmDTW - STL
Nonstop1h 32mSpirit Airlines
Mon 9/12:30 pmSTL - DTW
Nonstop1h 30mSpirit Airlines
Deal found 8/14$108
This Mytrip deal was found by Cheapflights users on 8/13. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/291:00 pmDTW - STL
Nonstop1h 32mSpirit Airlines
Sun 8/312:30 pmSTL - DTW
Nonstop1h 30mSpirit Airlines
Deal found 8/13$110
This Priceline deal was found by Cheapflights users on 8/12. 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 8/251:00 pmDTW - STL
Nonstop1h 32mSpirit Airlines
Sun 8/312:30 pmSTL - DTW
Nonstop1h 30mSpirit Airlines
Deal found 8/12$119
This Southwest deal was found by Cheapflights users on 8/12. 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 9/258:55 amDTW - STL
Nonstop1h 35mSouthwest
Tue 9/305:25 pmSTL - DTW
Nonstop1h 30mSouthwest
Deal found 8/12$137
This Delta deal was found by Cheapflights users on 8/12. 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 9/46:25 pmDTW - STL
Nonstop1h 36mDelta
Sun 9/76:40 amSTL - DTW
Nonstop1h 33mDelta
Deal found 8/12$139
This FlightHub deal was found by Cheapflights users on 8/13. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/211:00 pmDTW - STL
Nonstop1h 32mSpirit Airlines
Fri 8/222:30 pmSTL - DTW
Nonstop1h 30mSpirit Airlines
Deal found 8/13$148
This Southwest deal was found by Cheapflights users on 8/14. 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 9/188:15 pmDTW - STL
Nonstop1h 35mSouthwest
Sun 9/2111:15 amSTL - DTW
Nonstop1h 30mSouthwest
Deal found 8/14$154
This Southwest deal was found by Cheapflights users on 8/14. 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 10/287:25 pmDTW - STL
Nonstop1h 35mSouthwest
Wed 10/295:30 pmSTL - DTW
Nonstop1h 30mSouthwest
Deal found 8/14$155
This Southwest deal was found by Cheapflights users on 8/13. 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 9/48:55 amDTW - STL
Nonstop1h 35mSouthwest
Sat 9/65:55 pmSTL - DTW
Nonstop1h 30mSouthwest
Deal found 8/13$158

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 August 14, 2025.
Use the filters below to find and compare flights from Detroit to St. Louis that are best for you.

Fly from

Detroit

Fly to

St. Louis

Route

Depart

Return

Price

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 8/28

1:00 pm-1:32 pm

Nonstop1h 32m

Lambert-St Louis

Mon 9/1

2:30 pm-5:00 pm

Nonstop1h 30m

$97

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 8/28

1:00 pm-1:32 pm

Nonstop1h 32m

Lambert-St Louis

Sun 8/31

2:30 pm-5:00 pm

Nonstop1h 30m

$106

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Fri 8/29

1:00 pm-1:32 pm

Nonstop1h 32m

Lambert-St Louis

Mon 9/1

2:30 pm-5:00 pm

Nonstop1h 30m

$108

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Fri 8/29

1:00 pm-1:32 pm

Nonstop1h 32m

Lambert-St Louis

Sun 8/31

2:30 pm-5:00 pm

Nonstop1h 30m

$108

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Mon 8/25

1:00 pm-1:32 pm

Nonstop1h 32m

Lambert-St Louis

Sun 8/31

2:30 pm-5:00 pm

Nonstop1h 30m

$130

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 9/18

8:15 pm-8:50 pm

Nonstop1h 35m

Lambert-St Louis

Sun 9/21

11:15 am-1:45 pm

Nonstop1h 30m

$154

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Wed 9/17

7:40 am-8:15 am

Nonstop1h 35m

Lambert-St Louis

Wed 9/24

5:25 pm-7:55 pm

Nonstop1h 30m

$155

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Sun 8/31

1:00 pm-1:32 pm

Nonstop1h 32m

$42

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 10/2

8:25 am-9:05 am

Nonstop1h 40m

$60

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 9/18

8:55 am-9:30 am

Nonstop1h 35m

$60

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 15 results
1
2

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 August 8, 2025.

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 33 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 $311). Flying from Detroit to St. Louis in March is currently the most expensive (average of $356). 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 14, 2025.

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 16% versus a flight in the morning.

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 10, 2025.

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. Sunday at noon 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 August 14, 2025.

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 (1 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 August 14, 2025.
See what other customers who have flown with Southwest, Delta, and Spirit 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
4,244 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,244 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,980 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,046 reviews
Southwest
8.0
Very good
4,244 reviews

Overall

8.0

Entertainment

7.5

Boarding

8.1

Crew

8.6

Comfort

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 5 different airlines have flights from All airports (DTT) to Lambert-St Louis (STL) on a regular basis. There are 12 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 30m.

  • 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 $36 on this airline. Additional options worth looking into are Delta and Southwest, starting at $143 and $149 round-trip. You may be able to fly from Detroit to St. Louis for 87% less than the average price by searching for these airlines.

  • 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: Aeromexico (91%), Endeavor Airlines (83%), Spirit Airlines (82%).

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

    While on average a flight from Detroit to St. Louis is generally $158, our data shows the cheapest flight currently is $39. When looking at the most popular route, (Detroit Metropolitan Wayne County - Lambert-St Louis), you can expect to pay $90 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 $311). Flying from Detroit to St. Louis in March is currently the most expensive (average of $356). 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
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Eureka
St. Peters
Glencoe
Alton
Chesterfield
Farmington
Festus

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Top 5 airlines flying from Detroit to St. Louis

Discover the top 5 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$36Average$82FlexibilityNo cancel feeOn-time65%
DeltaCheapest$143Average$305FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$149Average$299FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$179Average$277FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$340Average$528FlexibilityNo cancel feeOn-time69%

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