HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Detroit

$70+ Cheap flights from St. Louis to Detroit (STL - DTT)

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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — DTT
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from St. Louis to Detroit 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.
Cheapflights Tip: The best prices from Lambert-St Louis to Detroit All airports are usually found in August or July, booked 50 days in advance, depart on a Friday or Thursday and return on a Thursday

Cheap flight deals from St. Louis to Detroit

Cheapest flights from St. Louis to Detroit
Explore the most affordable flight options available from St. Louis to Detroit. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This Expedia deal was found by Cheapflights users on 3/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:27 pm
STL
-
DTW
1 stop6h 12m
Frontier
Sat 5/97:55 am
DTW
-
STL
1 stop12h 28m
Frontier
Deal found 3/22$140
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.
Wed 4/158:23 pm
STL
-
DTW
1 stop11h 42m
Frontier
Tue 4/2112:33 pm
DTW
-
STL
1 stop19h 17m
Frontier
Deal found 3/20$157
This Expedia deal was found by Cheapflights users on 3/22. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:16 pm
STL
-
DTW
1 stop13h 42m
Frontier
Sun 4/129:02 pm
DTW
-
STL
1 stop11h 49m
Frontier
Deal found 3/22$160
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.
Thu 4/2311:25 am
STL
-
DTW
1 stop6h 21m
Frontier
Sun 4/265:09 pm
DTW
-
STL
1 stop14h 41m
Frontier
Deal found 3/21$167
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 4/1611:25 am
STL
-
DTW
1 stop6h 21m
Frontier
Tue 4/217:04 pm
DTW
-
STL
1 stop12h 46m
Frontier
Deal found 3/20$169
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:23 pm
STL
-
DTW
1 stop11h 42m
Frontier
Thu 4/238:43 pm
DTW
-
STL
1 stop11h 07m
Frontier
Deal found 3/20$181
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/111:06 pm
STL
-
DTW
1 stop10h 53m
Frontier
Mon 4/1311:48 am
DTW
-
STL
1 stop12h 37m
Frontier
Deal found 3/20$182
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.
Fri 4/174:59 pm
STL
-
DTW
2 stops17h 46m
Frontier
Tue 4/217:04 pm
DTW
-
STL
1 stop12h 46m
Frontier
Deal found 3/20$185
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.
Fri 4/178:23 pm
STL
-
DTW
1 stop14h 22m
Frontier
Sun 4/195:09 pm
DTW
-
STL
1 stop14h 41m
Frontier
Deal found 3/18$191
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.
Thu 4/96:29 pm
STL
-
DTW
1 stop15h 43m
Multiple Airlines
Mon 4/139:50 pm
DTW
-
STL
2 stops34h 00m
Multiple Airlines
Deal found 3/18$192

Find flight deals from St. Louis to Detroit

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Detroit (DTT). 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 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$140
(Expedia)

One-way from

$70
(Frontier)

Popular in

February

Cheapest in

August

Average price

$339

Good round-trip deal

$390 or less

Good one-way deal

$187 or less
Provider with most accurate pricing for Lambert-St Louis-Detroit (DTT) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Detroit (DTT) flights.
Search Deals
From Lambert-St Louis to Detroit (DTT)
Search Deals
One-way flight from Lambert-St Louis to Detroit (DTT)
Search Deals
Highest demand for flights based on searches. 28% potential increase in price ($118 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($20 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 Lambert-St Louis to Detroit (DTT).
Search Deals
Price to beat on a one-way flight from Lambert-St Louis to Detroit (DTT).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from St. Louis to Detroit 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 23, 2026.
Use the filters below to find and compare flights from St. Louis to Detroit that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Thu 4/9

6:32 am-9:07 am

Nonstop1h 35m

Detroit Metropolitan Wayne County

Wed 4/15

4:00 pm-4:42 pm

Nonstop1h 42m

$205

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Sat 4/11

5:40 am-10:00 am

1 stop3h 20m

Detroit Metropolitan Wayne County

Tue 4/14

7:00 am-7:45 am

Nonstop1h 45m

$215

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Wed 4/22

2:30 pm-10:30 pm

2 stops7h 00m

Detroit Metropolitan Wayne County

Sat 4/25

7:20 am-8:00 am

Nonstop1h 40m

$220

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Wed 4/15

10:50 am-1:19 pm

Nonstop1h 29m

Detroit Metropolitan Wayne County

Wed 4/22

7:00 am-11:32 am

1 stop5h 32m

$225
Quickest round-trip

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Fri 5/1

5:59 pm-8:28 pm

Nonstop1h 29m

Detroit Metropolitan Wayne County

Sat 5/2

8:02 pm-8:44 pm

Nonstop1h 42m

$276

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Thu 6/4

4:35 pm-12:15 am

2 stops6h 40m

Detroit Metropolitan Wayne County

Sun 6/21

7:05 am-7:40 am

Nonstop1h 35m

$291

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Wed 4/15

9:10 am-3:22 pm

1 stop5h 12m

Detroit Metropolitan Wayne County

Wed 4/22

12:11 pm-9:52 pm

2 stops10h 41m

$292

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Fri 3/27

4:51 pm-10:07 am

1 stop16h 16m

Detroit Metropolitan Wayne County

Sun 3/29

10:27 pm-9:49 am

1 stop12h 22m

$295

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Fri 4/24

7:40 pm-10:10 pm

Nonstop1h 30m

Detroit Metropolitan Wayne County

Sun 4/26

7:00 am-7:45 am

Nonstop1h 45m

$324

St. LouisDetroit

STL - DTW

STLDTW

Lambert-St Louis

Sun 5/3

10:50 am-1:19 pm

Nonstop1h 29m

Detroit Metropolitan Wayne County

Thu 6/11

8:50 am-9:32 am

Nonstop1h 42m

$339

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

Compare providers for flights from St. Louis to Detroit

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 St. Louis to Detroit in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*1 star
PricelinePrice Accuracy1 starTrust 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 St. Louis-Detroit flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Detroit flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Detroit flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on St. Louis-Detroit 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 St. Louis-Detroit 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 St. Louis to Detroit

Have a flexible travel schedule? Discover the best time to fly to Detroit from St. Louis 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 St. Louis to Detroit

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

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

Booking 49 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Detroit. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from St. Louis to Detroit?

Currently, June is the cheapest month in which you can book a flight from St. Louis to Detroit (average of $48). Flying from St. Louis to Detroit in April is currently the most expensive (average of $241). 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 STL to DTT?

Find hourly flight availability from St. Louis to Detroit. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 23, 2026.

One of the essential ways to save on airfare from St. Louis to Detroit is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 64% on airfare.

What is the cheapest day to fly from St. Louis to Detroit?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Detroit. Price data was last updated on March 14, 2026.

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

Weekly flight availability from St. Louis to Detroit

Explore weekly flight availability from St. Louis to Detroit. 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 23, 2026.

The most flights from STL to DTT are scheduled on a Monday (17 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 on average).

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

Reviews of airlines servicing Detroit

Get insights into the airlines that provide service to Detroit. 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 Detroit. Reviews last updated March 23, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andJetBlue from St. Louis to Detroit to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,326 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

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
4,326 reviews
Southwest
8.0
Very good
4,326 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

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
8,317 reviews
Southwest
8.0
Very good
4,326 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

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.
JetBlue
7.2
Good
2,905 reviews
Southwest
8.0
Very good
4,326 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

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
8,539 reviews
Southwest
8.0
Very good
4,326 reviews

Comfort

8.0

Boarding

8.1

Overall

8.0

Entertainment

7.5

Crew

8.6

Food

7.0

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 St. Louis to Detroit. 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 St. Louis to Detroit?

    You will need to book a flight from Lambert-St Louis to Detroit All airports if you want to fly from St. Louis to Detroit. At least 4 different airlines have flights from Lambert-St Louis (STL) to All airports (DTT) on a regular basis. There are 14 flights to Detroit from the St. Louis airport per day. If you manage to book one that is nonstop, then you can expect the flight time from STL to DTT to be around 1h 29m.

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

    There are many flights that can get you from St. Louis to Detroit in 1h 35m. Fly via Delta or Southwest to get the fastest option. The distance between St. Louis and Detroit is about 439 mi. This flight may include one or multiple stops.

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

    Currently priced at $38, Spirit Airlines will fly you from St. Louis to Detroit and back. In addition to Spirit Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and Frontier - these airlines can fly you to your destination from $75 and $80, respectively. These flights start at 87% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as $30 on Spirit Airlines. Other airlines that offer cheap prices include Southwest from $60 and Delta from $75 one-way.

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

    Consider Endeavor Airlines (100%), Korean Air (87%) or Delta (79%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Detroit.

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

    Looking at all options, your cheapest flight can be booked for $137. While the most popular route (Lambert-St Louis - Detroit Metropolitan Wayne County) can be booked for $197 on average, our data indicates $402 when flying from St. Louis to Detroit.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Detroit 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 St. Louis to Detroit?

    Currently, June is the cheapest month in which you can book a flight from St. Louis to Detroit (average of $48). Flying from St. Louis to Detroit in April is currently the most expensive (average of $241). 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 Detroit?

Book flights to Detroit if you plan to visit one of these locations
Roseville
Port Huron

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top 4 airlines flying from St. Louis to Detroit

Discover the top 4 airlines that operate flights from St. Louis to Detroit. 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 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$38Average$78FlexibilityNo cancel feeOn-time65%
DeltaCheapest$75Average$297FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$80Average$275FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$119Average$277FlexibilityNo cancel feeOn-time63%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
Site
©2026 Cheapflights