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Cheap flights from Michigan to St. Louis from $40

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Michigan to St. Louis departing on 4/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Michigan to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
7:40 pm - 9:05 pm
ORD
-
STL
1h 25mnonstop
United Airlines Logo
6:49 pm - 8:20 pm
STL
-
ORD
1h 31mnonstop
$91United Airlines
Sat, Mar 28 - Sat, May 2
United Airlines Logo
7:40 pm - 9:08 pm
ORD
-
STL
1h 28mnonstop
United Airlines Logo
9:10 am - 10:39 am
STL
-
ORD
1h 29mnonstop
$117United Airlines
Tue, Apr 14 - Tue, Apr 21
Frontier Logo
5:07 pm - 1:34 pm
DTW
-
STL
21h 27m
1 stop
Frontier Logo
11:32 am - 8:07 am
STL
-
DTW
19h 35m
1 stop
$135Frontier
Thu, Mar 12 - Wed, Mar 18
Southwest Logo
2:40 pm - 7:20 pm
ORD
-
STL
4h 40m
1 stop
Southwest Logo
5:45 am - 11:10 am
STL
-
ORD
5h 25m
1 stop
$137Southwest
Tue, Apr 14 - Tue, Apr 21
Frontier Logo
8:30 am - 10:27 pm
ORD
-
STL
13h 57m
1 stop
Frontier Logo
8:22 pm - 10:51 am
STL
-
ORD
14h 29m
1 stop
$138Frontier
Wed, Feb 25 - Fri, Feb 27
Multiple Airlines Logo
2:35 pm - 6:51 am
DTW
-
STL
17h 16m
1 stop
Multiple Airlines Logo
8:22 pm - 1:30 pm
STL
-
DTW
16h 08m
1 stop
$145Multiple Airlines
Tue, Feb 24 - Fri, Feb 27
Multiple Airlines Logo
2:35 pm - 6:51 am
DTW
-
STL
17h 16m
1 stop
Multiple Airlines Logo
1:09 pm - 8:47 am
STL
-
DTW
18h 38m
1 stop
$147Multiple Airlines
Tue, Mar 3 - Fri, Mar 6
Southwest Logo
6:30 pm - 7:45 pm
MDW
-
STL
1h 15mnonstop
Southwest Logo
5:40 am - 6:50 am
STL
-
MDW
1h 10mnonstop
$157Southwest
Sat, Apr 18 - Mon, Apr 20
Delta Logo
8:52 am - 1:05 pm
ORD
-
STL
4h 13m
1 stop
Delta Logo
11:43 am - 4:42 pm
STL
-
ORD
4h 59m
1 stop
$157Delta
Tue, Apr 14 - Tue, Apr 21
Delta Logo
9:35 am - 12:58 pm
MDW
-
STL
3h 23m
1 stop
Delta Logo
6:20 am - 1:32 pm
STL
-
MDW
7h 12m
1 stop
$191Delta
Wed, Apr 1 - Thu, Apr 30

Delta flights from Michigan to St. Louis

Our best Delta deals on Michigan to St. Louis flight tickets
Delta
Apr 14
ORD8:52 amChicago O'Hare Intl
4h 13m
1 stop
STL1:05 pmLambert-St Louis
Apr 21
STL11:43 amLambert-St Louis
4h 59m
1 stop
ORD4:42 pmChicago O'Hare Intl
$157
Delta
Apr 14
ORD8:52 amChicago O'Hare Intl
7h 58m
2 stops
STL4:50 pmLambert-St Louis
Apr 21
STL11:43 amLambert-St Louis
4h 59m
1 stop
ORD4:42 pmChicago O'Hare Intl
$162
Delta
Apr 14
ORD7:00 amChicago O'Hare Intl
9h 50m
2 stops
STL4:50 pmLambert-St Louis
Apr 21
STL6:20 amLambert-St Louis
6h 25m
2 stops
ORD12:45 pmChicago O'Hare Intl
$167

United Airlines flights from Michigan to St. Louis

Our best United Airlines deals on Michigan to St. Louis flight tickets
United Airlines
Mar 28
ORD7:40 pmChicago O'Hare Intl
1h 25m
STL9:05 pmLambert-St Louis
May 2
STL6:49 pmLambert-St Louis
1h 31m
ORD8:20 pmChicago O'Hare Intl
$91
United Airlines
Apr 14
ORD7:40 pmChicago O'Hare Intl
1h 28m
STL9:08 pmLambert-St Louis
Apr 21
STL9:10 amLambert-St Louis
1h 29m
ORD10:39 amChicago O'Hare Intl
$117
United Airlines
Mar 28
ORD8:12 pmChicago O'Hare Intl
1h 30m
STL9:42 pmLambert-St Louis
May 5
STL7:45 amLambert-St Louis
1h 27m
ORD9:12 amChicago O'Hare Intl
$131

momondo 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, momondo users made 832,500 searches. Data last updated February 3, 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

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 3/28

7:40 pm-9:05 pm

Nonstop1h 25m

Lambert-St Louis

Sat 5/2

6:49 pm-8:20 pm

Nonstop1h 31m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 4/14

7:40 pm-9:08 pm

Nonstop1h 28m

Lambert-St Louis

Tue 4/21

9:10 am-10:39 am

Nonstop1h 29m

$117

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 3/12

5:07 pm-1:34 pm

1 stop21h 27m

Lambert-St Louis

Wed 3/18

11:32 am-8:07 am

1 stop19h 35m

$135

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 4/14

2:40 pm-7:20 pm

1 stop4h 40m

Lambert-St Louis

Tue 4/21

5:45 am-11:10 am

1 stop5h 25m

$137

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 2/25

8:30 am-10:27 pm

1 stop13h 57m

Lambert-St Louis

Fri 2/27

8:22 pm-10:51 am

1 stop14h 29m

$138

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Tue 2/24

2:35 pm-6:51 am

1 stop17h 16m

Lambert-St Louis

Fri 2/27

8:22 pm-1:30 pm

1 stop16h 08m

$145

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Tue 3/3

2:35 pm-6:51 am

1 stop17h 16m

Lambert-St Louis

Fri 3/6

1:09 pm-8:47 am

1 stop18h 38m

$147

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Sat 4/18

6:30 pm-7:45 pm

Nonstop1h 15m

Lambert-St Louis

Mon 4/20

5:40 am-6:50 am

Nonstop1h 10m

$157

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Tue 4/14

8:52 am-1:05 pm

1 stop4h 13m

Lambert-St Louis

Tue 4/21

11:43 am-4:42 pm

1 stop4h 59m

$157

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 4/1

9:35 am-12:58 pm

1 stop3h 23m

Lambert-St Louis

Thu 4/30

6:20 am-1:32 pm

1 stop7h 12m

$191

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Michigan to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, August is the cheapest month to fly from Michigan to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $121. The month of July is another great option to travel to St. Louis, with average flight prices from Michigan averaging around $143.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Thursday when prices can be found for as low as $298. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $387. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Michigan at noon is the least expensive time of day to depart. momondo users have found prices as low as $283 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $328 per ticket.

What is the cheapest Michigan to Lambert-St Louis flight route?

Fly from Detroit Metropolitan Wayne County to Lambert-St Louis for the best Michigan - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from Michigan when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $275 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from Michigan for as low as $69 on momondo.

What cabin class options are available on Michigan to Lambert-St Louis flights?

There are 4 cabin classes available to choose from on Michigan to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Michigan to St. Louis flights?

No. A direct flight is the cheapest option for a flight between Michigan to St. Louis.

Cheap Michigan to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Michigan to St. Louis

Best Price Found

$168

Fastest flight time

1h 10m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Michigan in the past 72 hours is $168. The best round-trip flight deal from Michigan to St. Louis found on momondo in the last 72 hours is $299.
The fastest flight from Michigan to St. Louis takes 1h 10m
Direct flights go from Michigan to St. Louis every day.
There is 1 airport in St. Louis. From Michigan there are direct flights to Lambert-St Louis (STL).
Search flight deals

  • When did momondo last update prices for flights from Michigan to Lambert-St Louis Airport?

    Prices for flights from Michigan to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from Michigan to Lambert-St Louis Airport?

  • How old do you have to be to fly from Michigan to Lambert-St Louis Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Michigan to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Michigan to St. Louis?

Best airlines flying from Michigan to St. Louis

Compare and see reviews for airlines that fly from Michigan to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
Spirit AirlinesPriceFrom $28Free CancellationRating
6.3
8,404 reviews
Search Spirit Airlines flights
FrontierPriceFrom $111Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
DeltaPriceFrom $121Free CancellationRating
7.9
8,138 reviews
Search Delta flights
SouthwestPriceFrom $137Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
American AirlinesPriceFrom $200Free CancellationRating
7.2
11,216 reviews
Search American Airlines flights
United AirlinesPriceFrom $228Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from Michigan to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Michigan to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Michigan to St. Louis with flexible booking policies on momondo?

All flight searches from Michigan to St. Louis on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Michigan to St. Louis?

Once all potential Michigan to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Michigan to St. Louis right now. Can momondo alert me if prices change?

Price alerts on flights to St. Louis from Michigan are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

An easier way to manage your St. Louis trip

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