HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
St. Louis

$49+ Cheap flights from Michigan to St. Louis (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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
DTW — STL
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Michigan 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 Michigan to St. Louis

Cheapest flights from Michigan to St. Louis
Explore the most affordable flight options available from Michigan to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.

This Kiwi.com deal was found by Cheapflights users on 3/9. 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 5/125:09 pm
DTW
-
STL
1 stop14h 41m
Frontier
Mon 5/188:13 pm
STL
-
DTW
1 stop14h 18m
Frontier
Deal found 3/9$146
This Frontier deal was found by Cheapflights users on 3/8. 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 4/143:50 pm
DTW
-
STL
1 stop8h 29m
Frontier
Wed 4/158:23 pm
STL
-
DTW
1 stop11h 42m
Frontier
Deal found 3/8$160
This Kiwi.com deal was found by Cheapflights users on 3/9. 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
Mon 4/278:23 pm
STL
-
DTW
1 stop20h 44m
Frontier
Deal found 3/9$162
This Kiwi.com deal was found by Cheapflights users on 3/8. 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 4/248:49 pm
DTW
-
STL
1 stop11h 01m
Frontier
Mon 4/278:23 pm
STL
-
DTW
1 stop20h 44m
Frontier
Deal found 3/8$163
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 3/249:02 am
DTW
-
STL
2 stops25h 47m
Frontier
Thu 3/2611:21 am
STL
-
DTW
1 stop19h 46m
Frontier
Deal found 3/6$185
This Kiwi.com deal was found by Cheapflights users on 3/6. 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
Sun 5/38:06 pm
STL
-
DTW
2 stops12h 04m
Frontier
Deal found 3/6$189
This Kiwi.com deal was found by Cheapflights users on 3/6. 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 5/87:57 pm
DTW
-
STL
1 stop11h 53m
Frontier
Sun 5/104:55 pm
STL
-
DTW
2 stops22h 19m
Frontier
Deal found 3/6$193
This Southwest deal was found by Cheapflights users on 3/10. 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 4/77:10 pm
DTW
-
STL
Nonstop1h 45m
Southwest
Tue 4/146:45 pm
STL
-
DTW
Nonstop1h 30m
Southwest
Deal found 3/10$197
This Kiwi.com deal was found by Cheapflights users on 3/9. 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 4/238:43 pm
DTW
-
STL
1 stop11h 07m
Frontier
Mon 4/278:23 pm
STL
-
DTW
1 stop20h 44m
Frontier
Deal found 3/9$201
This Southwest deal was found by Cheapflights users on 3/7. 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.
Sat 4/46:25 pm
MDW
-
STL
1 stop5h 10m
Southwest
Sat 4/115:15 am
STL
-
MDW
2 stops6h 55m
Southwest
Deal found 3/7$234
This United Airlines deal was found by Cheapflights users on 3/9. 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.
Tue 5/127:45 pm
ORD
-
STL
Nonstop1h 28m
United Airlines
Sat 5/167:45 am
STL
-
ORD
Nonstop1h 27m
United Airlines
Deal found 3/9$234
This Southwest deal was found by Cheapflights users on 3/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/267:45 am
MDW
-
STL
Nonstop1h 15m
Southwest
Thu 3/269:50 pm
STL
-
MDW
Nonstop1h 10m
Southwest
Deal found 3/5$235

Find flight deals from Michigan to St. Louis

Keep the following information in mind while searching for Michigan to St. Louis flight deals. Data was last updated March 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$146
(Kiwi.com)

One-way from

$49
(Southwest)

Popular in

February

Cheapest in

August

Average price

$339

Good round-trip deal

$366 or less

Good one-way deal

$179 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 Michigan to Lambert-St Louis
Search Deals
One-way flight from Michigan to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($69 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($15 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 Michigan to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Michigan to Lambert-St Louis.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Michigan 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 10, 2026.
Use the filters below to find and compare flights from Michigan 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

Thu 4/9

7:00 am-7:45 am

Nonstop1h 45m

Lambert-St Louis

Mon 4/13

7:40 pm-10:10 pm

Nonstop1h 30m

$215

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Mon 4/6

8:25 pm-11:30 pm

1 stop4h 05m

Lambert-St Louis

Mon 4/13

1:45 pm-10:20 pm

2 stops7h 35m

$240

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sun 4/26

2:40 pm-11:45 pm

1 stop9h 05m

Lambert-St Louis

Tue 4/28

8:35 am-3:00 pm

1 stop6h 25m

$243

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 4/22

2:35 pm-8:00 pm

1 stop5h 25m

Lambert-St Louis

Wed 4/29

1:15 pm-7:35 pm

2 stops6h 20m

$245

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Fri 4/10

9:30 pm-10:45 pm

Nonstop1h 15m

Lambert-St Louis

Mon 4/13

4:10 pm-9:15 pm

1 stop5h 05m

$254

LansingSt. Louis

LAN - STL

LANSTL

Lansing Capital City

Tue 3/31

6:26 pm-8:42 pm

1 stop3h 16m

Lambert-St Louis

Sat 4/4

6:32 am-10:50 am

1 stop3h 18m

$255

KalamazooSt. Louis

AZO - STL

AZOSTL

Kalamazoo Intl

Tue 3/31

6:17 pm-8:42 pm

1 stop3h 25m

Lambert-St Louis

Sat 4/4

6:32 am-11:59 am

1 stop4h 27m

$258

South BendSt. Louis

SBN - STL

SBNSTL

South Bend/Michiana

Wed 4/1

2:16 pm-4:32 pm

1 stop3h 16m

Lambert-St Louis

Mon 4/6

6:32 am-1:33 pm

1 stop6h 01m

$259

South BendSt. Louis

SBN - STL

SBNSTL

South Bend/Michiana

Thu 5/21

8:20 am-1:10 pm

1 stop5h 50m

Lambert-St Louis

Mon 5/25

6:45 am-1:38 pm

1 stop5h 53m

$259

South BendSt. Louis

SBN - STL

SBNSTL

South Bend/Michiana

Wed 4/1

12:19 pm-5:53 pm

1 stop6h 34m

Lambert-St Louis

Sun 4/5

6:32 am-1:33 pm

1 stop6h 01m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 60 resultsSorted by cheapest first
1
2
3
...
6

Best time to book a flight from Michigan to St. Louis

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

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

Currently, August is the cheapest month in which you can book a flight from Michigan to St. Louis (average of $39). Flying from Michigan 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 MI to STL?

Find hourly flight availability from Michigan 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 10, 2026.

It’s typically best to fly out from Michigan to St. Louis at noon. Doing so could potentially save you 17% on the flight price compared to flying in the morning, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from Michigan to St. Louis. Price data was last updated on February 21, 2026.

Travelers seeking maximum savings on their Michigan 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 Michigan to St. Louis

Explore weekly flight availability from Michigan 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 10, 2026.

The most flights from USMI to STL are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

Related info for your journey

Find useful and relevant information for your journey from Michigan 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 airport do you fly into for flights to St. Louis from Michigan?

    For a flight from Michigan to St. Louis, you will be flying into Lambert-St Louis. Lambert-St Louis (STL) is just 12.7 mi from the center of the city.

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

    There are many flights that can get you from Michigan to St. Louis in 1h 45m. Fly via Southwest, Delta, or American Airlines to get the fastest option. Airlines will cover a distance of 439 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    The cheapest airline one-way is Spirit Airlines, with whom users have recently found tickets for as low as $36. However, be on the lookout for offers from Delta and Southwest, as they are both options that can get you from Michigan to St. Louis for a low price.

  • What are the most popular routes from Michigan to St. Louis?

    The most popular route from Michigan to St. Louis is Detroit Metropolitan Wayne County - Lambert-St Louis. You may also consider Chicago O'Hare Intl - Lambert-St Louis or Chicago Midway - Lambert-St Louis.

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

    No one likes to see their flight delayed. When booking a flight from Michigan to St. Louis consider choosing Endeavor Airlines (100%), Aeromexico (89%) or Korean Air (80%) as they are the most reliable in getting you off to your destination on time.

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

    Looking for the cheapest flight from Michigan to St. Louis? While on average our users pay $429, our data indicates the cheapest price to be $157. The most popular route (Detroit Metropolitan Wayne County - Lambert-St Louis), is priced around $183.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Michigan to St. Louis (average of $39). Flying from Michigan 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

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

Alternative routes for Michigan to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Kansas City flights
Newark to St. Louis flights
LaGuardia to Kansas City flights
LaGuardia to St. Louis flights
Newark to Kansas City flights
John F Kennedy Intl to St. Louis flights
Atlanta to Kansas City flights
Denver to St. Louis flights
Los Angeles to Kansas City flights
Seattle to Kansas City flights
Boston to St. Louis flights
Dulles Intl to St. Louis flights
Dulles Intl to Kansas City flights
Seattle to St. Louis flights
Boston to Kansas City flights
Minneapolis to Kansas City flights
Denver to Kansas City flights
San Francisco to Kansas City flights
Los Angeles to St. Louis flights
Dallas/Fort Worth to St. Louis flights
Baltimore to St. Louis flights
Reagan-National to St. Louis flights
O'Hare Intl to Kansas City flights
Atlanta to St. Louis flights
O'Hare Intl to St. Louis flights
Reagan-National to Kansas City flights
Hobby to St. Louis flights
San Francisco to St. Louis flights
Philadelphia to St. Louis flights
Hobby to Kansas City flights
Baltimore to Kansas City flights
Orlando to St. Louis flights
Sky Harbor Intl to St. Louis flights
Sky Harbor Intl to Kansas City flights
George Bush Intcntl to St. Louis flights
George Bush Intcntl to Kansas City flights
Minneapolis to St. Louis flights
Miami to Kansas City flights
Tampa to Kansas City flights
Dallas/Fort Worth to Kansas City flights
Philadelphia to Kansas City flights
Orlando to Kansas City flights
Raleigh to St. Louis flights
Charlotte to St. Louis flights
Salt Lake City to Kansas City flights
Detroit to St. Louis flights
Austin to St. Louis flights
Raleigh to Kansas City flights
Denver to Springfield flights
Detroit to Kansas City flights

Top 6 airlines flying from Michigan to St. Louis

Discover the top 6 airlines that operate flights from Michigan 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 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$28Average$88FlexibilityNo cancel feeOn-time65%
FrontierCheapest$111Average$262FlexibilityNo cancel feeOn-time62%
DeltaCheapest$120Average$348FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$121Average$357FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$200Average$328FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$228Average$368FlexibilityNo cancel feeOn-time69%

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.