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Cheap flights from Milwaukee to St. Louis from $97

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Milwaukee to St. Louis departing on 8/29. 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 Milwaukee to St. Louis

Cheap round-trip flights

United Airlines Logo
10:50 am - 2:19 pmMKE-STL
3h 29m1 stop
United Airlines Logo
5:30 pm - 9:56 pmSTL-MKE
4h 26m1 stop
$237United Airlines
Find Deal
Tue, Sep 16 - Tue, Sep 23
Southwest Logo
4:30 pm - 5:50 pmMKE-STL
1h 20mnonstop
Southwest Logo
8:25 am - 9:40 amSTL-MKE
1h 15mnonstop
$244Southwest
Find Deal
Tue, Sep 16 - Sat, Sep 20
Southwest Logo
4:30 pm - 5:50 pmMKE-STL
1h 20mnonstop
Southwest Logo
5:50 pm - 10:25 pmSTL-MKE
4h 35m1 stop
$247Southwest
Find Deal
Tue, Sep 16 - Tue, Sep 23
Southwest Logo
3:55 pm - 5:10 pmMKE-STL
1h 15mnonstop
Southwest Logo
8:20 pm - 9:35 pmSTL-MKE
1h 15mnonstop
$251Southwest
Find Deal
Sat, Sep 13 - Mon, Sep 15
Delta Logo
5:30 pm - 11:09 pmMKE-STL
5h 39m1 stop
Delta Logo
12:15 pm - 4:44 pmSTL-MKE
4h 29m1 stop
$254Delta
Find Deal
Sat, Sep 13 - Tue, Sep 23
Delta Logo
5:35 pm - 9:50 pmMKE-STL
4h 15m1 stop
Delta Logo
5:32 pm - 9:08 pmSTL-MKE
3h 36m1 stop
$261Delta
Find Deal
Sat, Sep 13 - Mon, Sep 15
Southwest Logo
2:45 pm - 9:40 pmMKE-STL
6h 55m2 stops
Southwest Logo
1:20 pm - 7:45 pmSTL-MKE
6h 25m1 stop
$262Southwest
Find Deal
Tue, Sep 16 - Tue, Sep 23
Southwest Logo
7:30 pm - 10:55 pmMKE-STL
3h 25m1 stop
Southwest Logo
4:15 pm - 9:10 pmSTL-MKE
4h 55m1 stop
$264Southwest
Find Deal
Mon, Oct 13 - Wed, Oct 15
United Airlines Logo
12:05 pm - 3:44 pmMKE-STL
3h 39m1 stop
United Airlines Logo
12:25 pm - 5:06 pmSTL-MKE
4h 41m1 stop
$304United Airlines
Find Deal
Fri, Sep 26 - Sun, Sep 28
Frontier Logo
8:04 pm - 9:06 amMKE-STL
13h 02m1 stop
Frontier Logo
7:55 pm - 6:41 pmSTL-MKE
22h 46m1 stop
$328Frontier
Find Deal
Mon, Sep 8 - Thu, Sep 11

Southwest flights from Milwaukee to St. Louis

Our best Southwest deals on Milwaukee to St. Louis flight tickets
Southwest
Sep 16
MKE4:30 pmMilwaukee-Mitchell
1h 20m
STL5:50 pmLambert-St Louis
Sep 20
STL8:25 amLambert-St Louis
1h 15m
MKE9:40 amMilwaukee-Mitchell
$244
Find similar
Southwest
Sep 16
MKE4:30 pmMilwaukee-Mitchell
1h 20m
STL5:50 pmLambert-St Louis
Sep 23
STL5:50 pmLambert-St Louis
4h 35m
1 stop
MKE10:25 pmMilwaukee-Mitchell
$247
Find similar
Southwest
Sep 13
MKE3:55 pmMilwaukee-Mitchell
1h 15m
STL5:10 pmLambert-St Louis
Sep 15
STL8:20 pmLambert-St Louis
1h 15m
MKE9:35 pmMilwaukee-Mitchell
$251
Find similar

Delta flights from Milwaukee to St. Louis

Our best Delta deals on Milwaukee to St. Louis flight tickets
Delta
Sep 13
MKE5:30 pmMilwaukee-Mitchell
5h 39m
1 stop
STL11:09 pmLambert-St Louis
Sep 23
STL12:15 pmLambert-St Louis
4h 29m
1 stop
MKE4:44 pmMilwaukee-Mitchell
$254
Find similar
Delta
Sep 13
MKE5:35 pmMilwaukee-Mitchell
4h 15m
1 stop
STL9:50 pmLambert-St Louis
Sep 15
STL5:32 pmLambert-St Louis
3h 36m
1 stop
MKE9:08 pmMilwaukee-Mitchell
$261
Find similar
Delta
Oct 17
MKE7:03 pmMilwaukee-Mitchell
4h 04m
1 stop
STL11:07 pmLambert-St Louis
Oct 21
STL12:14 pmLambert-St Louis
6h 04m
1 stop
MKE6:18 pmMilwaukee-Mitchell
$269
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Milwaukee 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 August 24, 2025.
Use the filters below to find and compare flights from Milwaukee to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 9/16

10:50 am-2:19 pm

1 stop3h 29m

Lambert-St Louis

Tue 9/23

5:30 pm-9:56 pm

1 stop4h 26m

$237

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 9/16

4:30 pm-5:50 pm

Nonstop1h 20m

Lambert-St Louis

Sat 9/20

8:25 am-9:40 am

Nonstop1h 15m

$244

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 9/16

4:30 pm-5:50 pm

Nonstop1h 20m

Lambert-St Louis

Tue 9/23

5:50 pm-10:25 pm

1 stop4h 35m

$247

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sat 9/13

3:55 pm-5:10 pm

Nonstop1h 15m

Lambert-St Louis

Mon 9/15

8:20 pm-9:35 pm

Nonstop1h 15m

$251

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sat 9/13

5:30 pm-11:09 pm

1 stop5h 39m

Lambert-St Louis

Tue 9/23

12:15 pm-4:44 pm

1 stop4h 29m

$254

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sat 9/13

5:35 pm-9:50 pm

1 stop4h 15m

Lambert-St Louis

Mon 9/15

5:32 pm-9:08 pm

1 stop3h 36m

$261

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 9/16

2:45 pm-9:40 pm

2 stops6h 55m

Lambert-St Louis

Tue 9/23

1:20 pm-7:45 pm

1 stop6h 25m

$262

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Mon 10/13

7:30 pm-10:55 pm

1 stop3h 25m

Lambert-St Louis

Wed 10/15

4:15 pm-9:10 pm

1 stop4h 55m

$264

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Fri 9/26

12:05 pm-3:44 pm

1 stop3h 39m

Lambert-St Louis

Sun 9/28

12:25 pm-5:06 pm

1 stop4h 41m

$304

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Mon 9/8

8:04 pm-9:06 am

1 stop13h 02m

Lambert-St Louis

Thu 9/11

7:55 pm-6:41 pm

1 stop22h 46m

$328

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 Milwaukee 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, January is the cheapest month to fly from Milwaukee to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $270. The month of May is another great option to travel to St. Louis, with average flight prices from Milwaukee averaging around $292.

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 Tuesday when prices can be found for as low as $350. 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 Saturday because tickets tend to average around $417. 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 Milwaukee in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $374 when looking at flights departing in the afternoon. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $436 per ticket.

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

Fly from Milwaukee-Mitchell to Lambert-St Louis for the best Milwaukee-Mitchell - Lambert-St Louis flight prices

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

There are 1 cabin classes available to choose from on Milwaukee-Mitchell 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 Milwaukee to St. Louis flights?

You could potentially save up to 55% on your flight if you consider stops on a Milwaukee to St. Louis flight.

How have Milwaukee to St. Louis flight prices changed over time?

As of August 2025, prices for Milwaukee to St. Louis flights are approximately 46% cheaper when compared to flights at the same time last year.

When to book flights from Milwaukee to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from Milwaukee to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Milwaukee to St. Louis (MKE to STL) flight deals and tips

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

Best Price Found

$155

Fastest flight time

1h 15m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Milwaukee in the past 72 hours is $155. The best round-trip flight deal from Milwaukee to St. Louis found on momondo in the last 72 hours is $271.
The fastest flight from Milwaukee to St. Louis takes 1h 15m
Direct flights go from Milwaukee to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • How far is Milwaukee-Mitchell to Lambert-St Louis by plane?

    The straight-line distance from Milwaukee-Mitchell to Lambert-St Louis is 327.2 mi. Flights usually cover this in 1h 15m, depending on flying conditions and air traffic around both airports.

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

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

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

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

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Milwaukee-Mitchell Airport to Lambert-St Louis Airport.

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

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

  • What is the most popular airline from Milwaukee to St. Louis?

Best airlines flying from Milwaukee to St. Louis

Compare and see reviews for airlines that fly from Milwaukee to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $156Free CancellationRating
7.4
8,937 reviews
Search United Airlines flights
American AirlinesPriceFrom $158Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
SouthwestPriceFrom $226Free CancellationRating
8.0
4,247 reviews
Search Southwest flights

  • Southwest Flights From Milwaukee to St. Louis

    Southwest is one of the most popular airlines flying from Milwaukee to St. Louis, operating 10 flights/week on average for this route. A good Southwest flight deal for Milwaukee to St. Louis starts from $226 round-trip, up to an average price of $332. Our users have rated Southwest at 8.0/10.

Traveling to a place near St. Louis?

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

Why use momondo?

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

Finding the right flight to St. Louis from Milwaukee is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to St. Louis quick and easy, saving you time and money.

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

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

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

momondo helps you find the best flight between Milwaukee and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Yes. momondo can track prices for Milwaukee to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your St. Louis trip

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