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Cheap flights from St. Louis to Milwaukee from $98

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Milwaukee departing on 9/11. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from St. Louis to Milwaukee

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:27 am - 11:07 amSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
3h 40m1 stop Chicago O'Hare Intl
American Airlines Logo
8:14 pm - 12:27 amMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 13m1 stop Chicago O'Hare Intl
$221American Airlines
Sat, Sep 26 - Mon, Sep 28
Delta Logo
2:38 pm - 8:06 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
5h 28m1 stop Detroit Metropolitan Wayne County
Delta Logo
9:35 am - 1:53 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 18m1 stop Detroit Metropolitan Wayne County
$221Delta
Wed, Oct 7 - Wed, Oct 14
Southwest Logo
5:10 pm - 11:30 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
6h 20m1 stop Baltimore/Washington
Southwest Logo
4:15 pm - 9:55 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
5h 40m1 stop Chicago Midway
$221Southwest
Thu, Nov 12 - Mon, Nov 16
Southwest Logo
5:50 pm - 12:15 amSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
6h 25m1 stop Nashville Intl
Southwest Logo
11:45 am - 7:45 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
8h 00m1 stop Denver Intl
$221Southwest
Mon, Oct 19 - Tue, Oct 27
Delta Logo
6:30 am - 12:45 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
6h 15m1 stop Detroit Metropolitan Wayne County
Delta Logo
4:57 pm - 8:35 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
3h 38m1 stop Detroit Metropolitan Wayne County
$221Delta
Wed, Sep 2 - Tue, Sep 8
Delta Logo
1:55 pm - 8:05 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
6h 10m1 stop Detroit Metropolitan Wayne County
Delta Logo
6:30 am - 10:34 amMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 04m1 stop Minneapolis St Paul
$221Delta
Mon, Sep 21 - Sat, Sep 26
American Airlines Logo
5:18 pm - 9:54 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
4h 36m1 stop Chicago O'Hare Intl
American Airlines Logo
7:30 am - 1:16 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
5h 46m1 stop Chicago O'Hare Intl
$239American Airlines
Fri, Sep 11 - Thu, Sep 17
American Airlines Logo
7:21 am - 12:48 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
5h 27m1 stop Chicago O'Hare Intl
American Airlines Logo
8:14 pm - 12:27 amMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 13m1 stop Chicago O'Hare Intl
$249American Airlines
Wed, Sep 16 - Fri, Sep 18
United Airlines Logo
8:00 am - 11:30 amSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
3h 30m1 stop Chicago O'Hare Intl
United Airlines Logo
3:52 pm - 9:21 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
5h 29m1 stop Chicago O'Hare Intl
$277United Airlines
Fri, Oct 16 - Fri, Oct 16
United Airlines Logo
9:30 am - 2:33 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
5h 03m1 stop Chicago O'Hare Intl
United Airlines Logo
6:00 am - 10:12 amMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 12m1 stop Chicago O'Hare Intl
$278United Airlines
Mon, Sep 7 - Sun, Sep 13

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Southwest flights from St. Louis to Milwaukee

Our best Southwest deals on St. Louis to Milwaukee flight tickets
Southwest
Oct 19
STL9:50 pmLambert-St Louis
1h 15m
MKE11:05 pmMilwaukee-Mitchell
Oct 27
MKE5:55 amMilwaukee-Mitchell
6h 20m
1 stop
STL12:15 pmLambert-St Louis
$225
Southwest
Oct 19
STL2:00 pmLambert-St Louis
10h 15m
2 stops
MKE12:15 amMilwaukee-Mitchell
Oct 27
MKE2:30 pmMilwaukee-Mitchell
7h 55m
1 stop
STL10:25 pmLambert-St Louis
$227
Southwest
Oct 19
STL9:50 pmLambert-St Louis
1h 15m
MKE11:05 pmMilwaukee-Mitchell
Oct 27
MKE4:30 pmMilwaukee-Mitchell
1h 15m
STL5:45 pmLambert-St Louis
$229

American Airlines flights from St. Louis to Milwaukee

Our best American Airlines deals on St. Louis to Milwaukee flight tickets
American Airlines
Sep 11
STL5:18 pmLambert-St Louis
4h 36m
1 stop
MKE9:54 pmMilwaukee-Mitchell
Sep 17
MKE7:30 amMilwaukee-Mitchell
5h 46m
1 stop
STL1:16 pmLambert-St Louis
$239
American Airlines
Sep 16
STL7:21 amLambert-St Louis
5h 27m
1 stop
MKE12:48 pmMilwaukee-Mitchell
Sep 18
MKE8:14 pmMilwaukee-Mitchell
4h 13m
1 stop
STL12:27 amLambert-St Louis
$249
American Airlines
Sep 21
STL11:01 amLambert-St Louis
7h 20m
1 stop
MKE6:21 pmMilwaukee-Mitchell
Sep 24
MKE2:48 pmMilwaukee-Mitchell
9h 39m
1 stop
STL12:27 amLambert-St Louis
$285

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Milwaukee 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 15, 2026.
Use the filters below to find and compare flights from St. Louis to Milwaukee that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Sat 9/26

7:27 am-11:07 am

1 stop3h 40m

Milwaukee-Mitchell

Mon 9/28

8:14 pm-12:27 am

1 stop4h 13m

$221

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Wed 10/7

2:38 pm-8:06 pm

1 stop5h 28m

Milwaukee-Mitchell

Wed 10/14

9:35 am-1:53 pm

1 stop4h 18m

$221

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Thu 11/12

5:10 pm-11:30 pm

1 stop6h 20m

Milwaukee-Mitchell

Mon 11/16

4:15 pm-9:55 pm

1 stop5h 40m

$221

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Mon 10/19

5:50 pm-12:15 am

1 stop6h 25m

Milwaukee-Mitchell

Tue 10/27

11:45 am-7:45 pm

1 stop8h 00m

$221

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Wed 9/2

6:30 am-12:45 pm

1 stop6h 15m

Milwaukee-Mitchell

Tue 9/8

4:57 pm-8:35 pm

1 stop3h 38m

$221

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Mon 9/21

1:55 pm-8:05 pm

1 stop6h 10m

Milwaukee-Mitchell

Sat 9/26

6:30 am-10:34 am

1 stop4h 04m

$221

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Fri 9/11

5:18 pm-9:54 pm

1 stop4h 36m

Milwaukee-Mitchell

Thu 9/17

7:30 am-1:16 pm

1 stop5h 46m

$239

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Wed 9/16

7:21 am-12:48 pm

1 stop5h 27m

Milwaukee-Mitchell

Fri 9/18

8:14 pm-12:27 am

1 stop4h 13m

$249

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Fri 10/16

8:00 am-11:30 am

1 stop3h 30m

Milwaukee-Mitchell

Fri 10/16

3:52 pm-9:21 pm

1 stop5h 29m

$277

St. LouisMilwaukee

STL Lambert-St Louis - MKE Milwaukee-Mitchell

STLMKE

Lambert-St Louis

Mon 9/7

9:30 am-2:33 pm

1 stop5h 03m

Milwaukee-Mitchell

Sun 9/13

6:00 am-10:12 am

1 stop4h 12m

$278

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 Milwaukee from

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

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 typical price of a round-trip flight between St. Louis and Milwaukee?

Prices are currently low for flights on this route.

Typical prices usually range from $390 to $725.
The lowest price recently found on this route was $221.

What is the cheapest month to fly to Milwaukee?

The cheapest month to fly to Milwaukee from St. Louis is in October. Flight prices, which tend to average around $265, are often lower during this time because this is during the off-season. The month of September is another great option to travel to Milwaukee, with average flight prices from St. Louis averaging around $273.

What is the cheapest day to depart on your flight to Milwaukee?

According to our data, Saturday is the cheapest day to fly to Milwaukee from St. Louis. The lowest ticket price found for a Saturday departure recently was $327. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from St. Louis to Milwaukee on a Monday will generally be more expensive and average around $725. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Milwaukee?

In the morning is the cheapest time of day to fly from St. Louis to Milwaukee when you can find flight prices for as low as $392. Flying to Milwaukee in the morning is an ideal time because this is during off-peak travel hours. In the evening is when there is more demand to fly to Milwaukee, so prices are often more expensive at around $593 per ticket.

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

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

What cabin class options are available on St. Louis to Milwaukee flights?

There is only 1 cabin class available to choose from on St. Louis to Milwaukee 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 St. Louis to Milwaukee flights?

You could potentially save up to 70% on your flight if you consider stops on a St. Louis to Milwaukee flight.

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

As of August 2026, prices for St. Louis to Milwaukee flights are approximately 128% more expensive when compared to flights at the same time last year.

When to book flights from St. Louis to Milwaukee

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

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

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

Best Price Found

$295

Fastest flight time

1h 10m

Direct flights

Every day

Airports in Milwaukee

1 airport
The best one-way flight to Milwaukee from St. Louis in the past 72 hours is $295. The best round-trip flight deal from St. Louis to Milwaukee found on momondo in the last 72 hours is $342.
The fastest flight from St. Louis to Milwaukee takes 1h 10m
Direct flights go from St. Louis to Milwaukee every day.
There is 1 airport in Milwaukee. From St. Louis there are direct flights to Milwaukee-Mitchell (MKE).
Search flight deals

Frequently asked questions about flying from St. Louis to Milwaukee

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

    A flight from Lambert-St Louis to Milwaukee-Mitchell will travel around 327.2 mi. In terms of flight time, this usually takes a little over 1h 10m.

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

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Milwaukee-Mitchell Airport.

  • What documentation or ID do you need to fly to Milwaukee-Mitchell Airport?

    The travel and health documents you'll need for your trip to Milwaukee-Mitchell 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 Milwaukee-Mitchell 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 St. Louis to Milwaukee?

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

Best airlines flying from St. Louis to Milwaukee

Compare and see reviews for airlines that fly from St. Louis to Milwaukee with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $117Free CancellationRating
7.4
10,108 reviews
Search United Airlines flights
SouthwestPriceFrom $252Free CancellationRating
8.0
4,220 reviews
Search Southwest flights
American AirlinesPriceFrom $266Free CancellationRating
7.1
11,927 reviews
Search American Airlines flights

  • Southwest Flights From St. Louis to Milwaukee

    Southwest is one of the most popular airlines flying from St. Louis to Milwaukee, operating 6 flights/week on average for this route. A good Southwest flight deal for St. Louis to Milwaukee starts from $252 round-trip, up to an average price of $391. Our users have rated Southwest at 8.0/10.

Traveling to a place near Milwaukee?

Book flights to Milwaukee if you plan to visit one of these locations
Sheboygan
Waukesha
Wauwatosa
Oak Creek
Mequon
Glendale
West Bend
Port Washington
Kohler
Pewaukee
New Berlin
Grafton

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Milwaukee for you.

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

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

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

momondo provides multiple filters to help you find the best flight to Milwaukee from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Price alerts on flights to Milwaukee from St. Louis 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.

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