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Cheap flights from St. Louis to Milwaukee from $79

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 1/13. 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 St. Louis to Milwaukee

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
10:19 am - 4:26 pm
STL
-
MKE
6h 07m1 stop
Delta Logo
5:11 pm - 8:43 pm
MKE
-
STL
3h 32m1 stop
$157Delta
Tue, Jan 13 - Tue, Jan 20
American Airlines Logo
6:44 pm - 10:05 pm
STL
-
MKE
3h 21m1 stop
American Airlines Logo
4:05 pm - 11:12 pm
MKE
-
STL
7h 07m1 stop
$159American Airlines
Wed, Jan 14 - Wed, Jan 21
Frontier Logo
8:32 pm - 6:47 pm
STL
-
MKE
22h 15m2 stops
Frontier Logo
6:56 pm - 11:33 pm
MKE
-
STL
28h 37m1 stop
$287Frontier
Wed, Jan 14 - Wed, Jan 21
United Airlines Logo
6:40 pm - 10:56 pm
STL
-
MKE
4h 16m1 stop
United Airlines Logo
6:00 am - 12:29 pm
MKE
-
STL
6h 29m1 stop
$314United Airlines
Wed, Jan 14 - Sun, Jan 18
United Airlines Logo
6:40 pm - 10:56 pm
STL
-
MKE
4h 16m1 stop
United Airlines Logo
2:32 pm - 9:13 pm
MKE
-
STL
6h 41m1 stop
$322United Airlines
Wed, Jan 14 - Sun, Jan 18
American Airlines Logo
6:05 am - 8:54 am
STL
-
MKE
2h 49m1 stop
American Airlines Logo
5:13 am - 9:25 am
MKE
-
STL
4h 12m1 stop
$351American Airlines
Mon, Apr 20 - Thu, Apr 23
American Airlines Logo
6:00 am - 5:49 pm
STL
-
MKE
11h 49m1 stop
American Airlines Logo
8:08 pm - 1:25 am
MKE
-
STL
5h 17m1 stop
$423American Airlines
Wed, Dec 31 - Sun, Jan 4
American Airlines Logo
6:41 am - 9:47 am
STL
-
MKE
3h 06m1 stop
American Airlines Logo
8:08 pm - 11:44 pm
MKE
-
STL
3h 36m1 stop
$433American Airlines
Tue, Dec 30 - Tue, Dec 30
Southwest Logo
6:45 am - 11:25 am
STL
-
MKE
4h 40m1 stop
Southwest Logo
6:30 pm - 7:55 pm
MKE
-
STL
1h 25mnonstop
$447Southwest
Tue, Dec 30 - Tue, Dec 30
Southwest Logo
7:50 am - 5:10 pm
STL
-
MKE
9h 20m2 stops
Southwest Logo
7:40 pm - 12:05 am
MKE
-
STL
4h 25m1 stop
$491Southwest
Tue, Dec 30 - Tue, Dec 30

Delta flights from St. Louis to Milwaukee

Our best Delta deals on St. Louis to Milwaukee flight tickets
Delta
Jan 13
STL10:19 amLambert-St Louis
6h 07m
1 stop
MKE4:26 pmMilwaukee-Mitchell
Jan 20
MKE5:11 pmMilwaukee-Mitchell
3h 32m
1 stop
STL8:43 pmLambert-St Louis
$157
Find similar
Delta
Dec 25
STL6:05 amLambert-St Louis
4h 23m
1 stop
MKE10:28 amMilwaukee-Mitchell
Dec 25
MKE4:04 pmMilwaukee-Mitchell
6h 12m
1 stop
STL10:16 pmLambert-St Louis
$635
Find similar
Delta
Dec 24
STL6:05 amLambert-St Louis
4h 23m
1 stop
MKE10:28 amMilwaukee-Mitchell
Dec 24
MKE4:04 pmMilwaukee-Mitchell
6h 12m
1 stop
STL10:16 pmLambert-St Louis
$657
Find similar

American Airlines flights from St. Louis to Milwaukee

Our best American Airlines deals on St. Louis to Milwaukee flight tickets
American Airlines
Jan 14
STL6:44 pmLambert-St Louis
3h 21m
1 stop
MKE10:05 pmMilwaukee-Mitchell
Jan 21
MKE4:05 pmMilwaukee-Mitchell
7h 07m
1 stop
STL11:12 pmLambert-St Louis
$159
Find similar
American Airlines
Apr 20
STL6:05 amLambert-St Louis
2h 49m
1 stop
MKE8:54 amMilwaukee-Mitchell
Apr 23
MKE5:13 amMilwaukee-Mitchell
4h 12m
1 stop
STL9:25 amLambert-St Louis
$351
Find similar
American Airlines
Dec 31
STL6:00 amLambert-St Louis
11h 49m
1 stop
MKE5:49 pmMilwaukee-Mitchell
Jan 4
MKE8:08 pmMilwaukee-Mitchell
5h 17m
1 stop
STL1:25 amLambert-St Louis
$423
Find similar

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 December 18, 2025.
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

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Tue 1/13

10:19 am-4:26 pm

1 stop6h 07m

Milwaukee-Mitchell

Tue 1/20

5:11 pm-8:43 pm

1 stop3h 32m

$157

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 1/14

6:44 pm-10:05 pm

1 stop3h 21m

Milwaukee-Mitchell

Wed 1/21

4:05 pm-11:12 pm

1 stop7h 07m

$159

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 1/14

8:32 pm-6:47 pm

2 stops22h 15m

Milwaukee-Mitchell

Wed 1/21

6:56 pm-11:33 pm

1 stop28h 37m

$287

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 1/14

6:40 pm-10:56 pm

1 stop4h 16m

Milwaukee-Mitchell

Sun 1/18

6:00 am-12:29 pm

1 stop6h 29m

$314

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 1/14

6:40 pm-10:56 pm

1 stop4h 16m

Milwaukee-Mitchell

Sun 1/18

2:32 pm-9:13 pm

1 stop6h 41m

$322

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Mon 4/20

6:05 am-8:54 am

1 stop2h 49m

Milwaukee-Mitchell

Thu 4/23

5:13 am-9:25 am

1 stop4h 12m

$351

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 12/31

6:00 am-5:49 pm

1 stop11h 49m

Milwaukee-Mitchell

Sun 1/4

8:08 pm-1:25 am

1 stop5h 17m

$423

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Tue 12/30

6:41 am-9:47 am

1 stop3h 06m

Milwaukee-Mitchell

Tue 12/30

8:08 pm-11:44 pm

1 stop3h 36m

$433

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Tue 12/30

6:45 am-11:25 am

1 stop4h 40m

Milwaukee-Mitchell

Tue 12/30

6:30 pm-7:55 pm

Nonstop1h 25m

$447

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Tue 12/30

7:50 am-5:10 pm

2 stops9h 20m

Milwaukee-Mitchell

Tue 12/30

7:40 pm-12:05 am

1 stop4h 25m

$491

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 cheapest month to fly to Milwaukee?

The cheapest month to fly to Milwaukee from St. Louis is in April. Flight prices, which tend to average around $260, are often lower during this time because this is during the off-season. The month of October is another great option to travel to Milwaukee, with average flight prices from St. Louis averaging around $263.

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

According to our data, Monday is the cheapest day to fly to Milwaukee from St. Louis. The lowest ticket price found for a Monday departure recently was $301. 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 Sunday will generally be more expensive and average around $663. 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 evening is the cheapest time of day to fly from St. Louis to Milwaukee when you can find flight prices for as low as $332. Flying to Milwaukee in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Milwaukee, so prices are often more expensive at around $375 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 Lambert-St Louis to Milwaukee-Mitchell flights?

There is only 1 cabin class available to choose from on Lambert-St Louis to Milwaukee-Mitchell 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 40% 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 December 2025, prices for St. Louis to Milwaukee flights are approximately 1% 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

$391

Fastest flight time

1h 15m

Direct flights

Mon, Tue, Wed, Fri and Sat

Airports in Milwaukee

1 airport
The best flight deal from St. Louis to Milwaukee found on momondo in the last 72 hours is $391
The fastest flight from St. Louis to Milwaukee takes 1h 15m
Direct flights go from St. Louis to Milwaukee on Monday, Tuesday, Wednesday, Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport in Milwaukee. From St. Louis there are direct flights to Milwaukee-Mitchell (MKE).
Search flight deals

  • 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 15m.

  • 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
American AirlinesPriceFrom $158Free CancellationRating
7.2
11,054 reviews
Search American Airlines flights
SouthwestPriceFrom $187Free CancellationRating
7.9
4,250 reviews
Search Southwest 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 $187 round-trip, up to an average price of $362. Our users have rated Southwest at 7.9/10.

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
Pewaukee
Kohler
Port Washington
West Bend
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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