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Cheap flights from St. Louis to Milwaukee from $95

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 2/25. 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.
Frontier Logo
3:49 pm - 3:44 pm
STL
-
MKE
23h 55m
1 stop
Frontier Logo
7:37 pm - 12:27 am
MKE
-
STL
28h 50m
1 stop
$309Frontier
Mon, Feb 23 - Thu, Feb 26
American Airlines Logo
2:29 pm - 8:25 pm
STL
-
MKE
5h 56m
1 stop
American Airlines Logo
7:52 am - 11:35 am
MKE
-
STL
3h 43m
1 stop
$315American Airlines
Wed, Apr 1 - Fri, Apr 3
United Airlines Logo
5:29 pm - 11:59 pm
STL
-
MKE
6h 30m
1 stop
United Airlines Logo
12:13 pm - 3:46 pm
MKE
-
STL
3h 33m
1 stop
$330United Airlines
Sun, Jul 5 - Wed, Jul 8
Southwest Logo
6:40 am - 11:45 am
STL
-
MKE
5h 05m
1 stop
Southwest Logo
8:15 am - 2:50 pm
MKE
-
STL
6h 35m
2 stops
$344Southwest
Sun, Jul 5 - Wed, Jul 8
Southwest Logo
6:40 am - 11:45 am
STL
-
MKE
5h 05m
1 stop
Southwest Logo
8:05 am - 9:25 am
MKE
-
STL
1h 20mnonstop
$350Southwest
Sun, Jul 5 - Wed, Jul 8
Southwest Logo
4:45 pm - 10:30 pm
STL
-
MKE
5h 45m
1 stop
Southwest Logo
5:30 pm - 6:55 pm
MKE
-
STL
1h 25mnonstop
$351Southwest
Fri, Mar 6 - Mon, Mar 9
United Airlines Logo
7:41 am - 2:05 pm
STL
-
MKE
6h 24m
1 stop
United Airlines Logo
6:00 am - 10:36 am
MKE
-
STL
4h 36m
1 stop
$352United Airlines
Wed, Feb 25 - Sat, Feb 28
Frontier Logo
3:49 pm - 3:44 pm
STL
-
MKE
23h 55m
1 stop
Frontier Logo
6:20 pm - 8:56 am
MKE
-
STL
14h 36m
2 stops
$355Frontier
Mon, Feb 16 - Fri, Feb 20
Southwest Logo
4:25 pm - 11:55 pm
STL
-
MKE
7h 30m
2 stops
Southwest Logo
6:20 pm - 11:45 pm
MKE
-
STL
5h 25m
1 stop
$356Southwest
Fri, Mar 6 - Mon, Mar 9
Southwest Logo
4:25 pm - 11:55 pm
STL
-
MKE
7h 30m
2 stops
Southwest Logo
4:55 pm - 12:05 am
MKE
-
STL
7h 10m
2 stops
$361Southwest
Fri, Mar 6 - Mon, Mar 9

Frontier flights from St. Louis to Milwaukee

Our best Frontier deals on St. Louis to Milwaukee flight tickets
Frontier
Feb 23
STL3:49 pmLambert-St Louis
23h 55m
1 stop
MKE3:44 pmMilwaukee-Mitchell
Feb 26
MKE7:37 pmMilwaukee-Mitchell
28h 50m
1 stop
STL12:27 amLambert-St Louis
$309
Frontier
Feb 14
STL9:41 amLambert-St Louis
9h 11m
1 stop
MKE6:52 pmMilwaukee-Mitchell
Feb 17
MKE4:39 pmMilwaukee-Mitchell
29h 48m
1 stop
STL10:27 pmLambert-St Louis
$336
Frontier
Feb 16
STL3:49 pmLambert-St Louis
23h 55m
1 stop
MKE3:44 pmMilwaukee-Mitchell
Feb 20
MKE6:20 pmMilwaukee-Mitchell
14h 36m
2 stops
STL8:56 amLambert-St Louis
$355

American Airlines flights from St. Louis to Milwaukee

Our best American Airlines deals on St. Louis to Milwaukee flight tickets
American Airlines
Apr 1
STL2:29 pmLambert-St Louis
5h 56m
1 stop
MKE8:25 pmMilwaukee-Mitchell
Apr 3
MKE7:52 amMilwaukee-Mitchell
3h 43m
1 stop
STL11:35 amLambert-St Louis
$315
American Airlines
Feb 20
STL4:13 pmLambert-St Louis
7h 06m
1 stop
MKE11:19 pmMilwaukee-Mitchell
Feb 23
MKE5:00 amMilwaukee-Mitchell
3h 41m
1 stop
STL8:41 amLambert-St Louis
$401
American Airlines
Feb 20
STL4:13 pmLambert-St Louis
7h 06m
1 stop
MKE11:19 pmMilwaukee-Mitchell
Feb 23
MKE5:00 amMilwaukee-Mitchell
3h 41m
1 stop
STL8:41 amLambert-St Louis
$433

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 February 3, 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

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Mon 2/23

3:49 pm-3:44 pm

1 stop23h 55m

Milwaukee-Mitchell

Thu 2/26

7:37 pm-12:27 am

1 stop28h 50m

$309

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 4/1

2:29 pm-8:25 pm

1 stop5h 56m

Milwaukee-Mitchell

Fri 4/3

7:52 am-11:35 am

1 stop3h 43m

$315

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Sun 7/5

5:29 pm-11:59 pm

1 stop6h 30m

Milwaukee-Mitchell

Wed 7/8

12:13 pm-3:46 pm

1 stop3h 33m

$330

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Sun 7/5

6:40 am-11:45 am

1 stop5h 05m

Milwaukee-Mitchell

Wed 7/8

8:15 am-2:50 pm

2 stops6h 35m

$344

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Sun 7/5

6:40 am-11:45 am

1 stop5h 05m

Milwaukee-Mitchell

Wed 7/8

8:05 am-9:25 am

Nonstop1h 20m

$350

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Fri 3/6

4:45 pm-10:30 pm

1 stop5h 45m

Milwaukee-Mitchell

Mon 3/9

5:30 pm-6:55 pm

Nonstop1h 25m

$351

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 2/25

7:41 am-2:05 pm

1 stop6h 24m

Milwaukee-Mitchell

Sat 2/28

6:00 am-10:36 am

1 stop4h 36m

$352

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Mon 2/16

3:49 pm-3:44 pm

1 stop23h 55m

Milwaukee-Mitchell

Fri 2/20

6:20 pm-8:56 am

2 stops14h 36m

$355

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Fri 3/6

4:25 pm-11:55 pm

2 stops7h 30m

Milwaukee-Mitchell

Mon 3/9

6:20 pm-11:45 pm

1 stop5h 25m

$356

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Fri 3/6

4:25 pm-11:55 pm

2 stops7h 30m

Milwaukee-Mitchell

Mon 3/9

4:55 pm-12:05 am

2 stops7h 10m

$361

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, Tuesday is the cheapest day to fly to Milwaukee from St. Louis. The lowest ticket price found for a Tuesday departure recently was $348. 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 $593. 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 $375. 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 $393 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 76% 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 February 2026, prices for St. Louis to Milwaukee flights are approximately 3% cheaper 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

$361

Fastest flight time

1h 10m

Direct flights

Every day

Airports in Milwaukee

1 airport
The best flight deal from St. Louis to Milwaukee found on momondo in the last 72 hours is $361
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

  • 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
American AirlinesPriceFrom $158Free CancellationRating
7.2
11,216 reviews
Search American Airlines flights
SouthwestPriceFrom $199Free CancellationRating
8.0
4,272 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 10 flights/week on average for this route. A good Southwest flight deal for St. Louis to Milwaukee starts from $199 round-trip, up to an average price of $381. 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
Pewaukee
Kohler
West Bend
Port Washington
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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