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St. Louis

$42+ 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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.
DTW — STL
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap 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 August 14, 2025.

Round-trip from

$87
(Southwest)

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 Michigan to Lambert-St Louis
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One-way flight from Michigan 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 Michigan to Lambert-St Louis.
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Price to beat on a one-way flight from Michigan to Lambert-St Louis.
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Find 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 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 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.
Wed 9/35:40 pmMDW - STL
Nonstop1h 15mSouthwest
Sat 9/610:30 amSTL - MDW
1 stop5h 40mSouthwest
Deal found 8/12$87
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1810:34 pmORD - STL
Nonstop1h 14mAmerican Airlines
Tue 10/78:42 amSTL - ORD
Nonstop1h 23mAmerican Airlines
Deal found 8/12$91
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 9/257:30 amMDW - STL
Nonstop1h 10mSouthwest
Sat 9/277:15 amSTL - MDW
2 stops6h 15mSouthwest
Deal found 8/13$92
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:10 pmORD - STL
Nonstop1h 22mAmerican Airlines
Sat 10/45:25 pmSTL - ORD
Nonstop1h 33mAmerican Airlines
Deal found 8/13$92
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/112:09 pmORD - STL
Nonstop1h 22mAmerican Airlines
Thu 10/26:05 amSTL - ORD
Nonstop1h 20mAmerican Airlines
Deal found 8/12$93
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 9/42:45 pmMDW - STL
1 stop5h 15mSouthwest
Mon 9/84:15 pmSTL - MDW
1 stop5h 20mSouthwest
Deal found 8/14$97
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 9/47:00 amORD - STL
1 stop5h 30mSouthwest
Mon 9/85:10 pmSTL - ORD
1 stop5h 55mSouthwest
Deal found 8/13$97
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/131:03 pmORD - STL
Nonstop1h 24mUnited Airlines
Mon 10/203:23 pmSTL - ORD
Nonstop1h 25mUnited Airlines
Deal found 8/13$107
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 Southwest deal was found by Cheapflights users on 8/11. 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 9/117:30 amORD - STL
2 stops11h 05mSouthwest
Mon 9/155:10 amSTL - ORD
1 stop5h 35mSouthwest
Deal found 8/11$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

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

Fly from

Michigan

Fly to

St. Louis

Route

Depart

Return

Price

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Mon 10/6

12:10 pm-5:00 pm

1 stop4h 50m

Lambert-St Louis

Tue 10/7

6:30 am-7:40 am

Nonstop1h 10m

$87

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 9/18

11:45 am-12:55 pm

Nonstop1h 10m

Lambert-St Louis

Sat 9/20

8:30 am-3:45 pm

1 stop7h 15m

$87

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 9/4

9:30 am-1:25 pm

1 stop3h 55m

Lambert-St Louis

Mon 9/8

5:25 am-6:35 am

Nonstop1h 10m

$87

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 9/3

5:40 pm-6:55 pm

Nonstop1h 15m

Lambert-St Louis

Sat 9/6

10:30 am-4:10 pm

1 stop5h 40m

$87

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Mon 9/29

10:34 pm-11:48 pm

Nonstop1h 14m

Lambert-St Louis

Wed 10/1

6:10 am-7:30 am

Nonstop1h 20m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 9/27

8:31 pm-9:53 pm

Nonstop1h 22m

Lambert-St Louis

Tue 9/30

6:10 am-7:30 am

Nonstop1h 20m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 9/3

2:29 pm-3:52 pm

Nonstop1h 23m

Lambert-St Louis

Sat 9/6

7:23 am-8:45 am

Nonstop1h 22m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/18

10:34 pm-11:48 pm

Nonstop1h 14m

Lambert-St Louis

Tue 10/7

8:42 am-10:05 am

Nonstop1h 23m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 9/18

10:34 pm-11:48 pm

Nonstop1h 14m

Lambert-St Louis

Sat 9/20

6:10 am-7:30 am

Nonstop1h 20m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 10/15

10:34 pm-11:54 pm

Nonstop1h 20m

Lambert-St Louis

Thu 10/16

7:16 am-8:43 am

Nonstop1h 27m

$91

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 60 results
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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 $311). Flying from Michigan 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 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 August 14, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Michigan to St. Louis as you normally would.

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 August 14, 2025.

The most flights from USMI 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).

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.

  • 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 $42. However, be on the lookout for offers from American Airlines 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 Chicago O'Hare Intl - Lambert-St Louis. You may also consider Detroit Metropolitan Wayne County - 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 Aeromexico (91%), Endeavor Airlines (83%) or Spirit Airlines (82%) 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 $158, our data indicates the cheapest price to be $39. The most popular route (Chicago O'Hare Intl - Lambert-St Louis), is priced around $77.

  • 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 $311). Flying from Michigan 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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Alternative routes for Michigan to St. Louis

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Top 5 airlines flying from Michigan to St. Louis

Discover the top 5 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$36Average$82FlexibilityNo cancel feeOn-time65%
DeltaCheapest$143Average$311FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$149Average$308FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$179Average$316FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$228Average$387FlexibilityNo cancel feeOn-time69%

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