What is the cheapest airline that flies from Lambert-St Louis to Milwaukee-Mitchell?

Southwest and Delta are the most popular carriers operating from Lambert-St Louis to Milwaukee-Mitchell

How many flights depart from St. Louis to Milwaukee on average per day?

The number of flights available between St. Louis and Milwaukee is 2 per day as of June 2026. The most frequent departure time is 8:00AM, with 50% of daily flights leaving at noon.

How many flights depart from St. Louis to Milwaukee on average per week?

16 flights are operational weekly from St. Louis to Milwaukee as of June 2026. The most popular departure day for this route is Mon, with 19% of flights per week taking off on this day.

What airlines fly to Milwaukee?

American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Milwaukee from St. Louis according to our data. American Airlines is the first choice among our users, with 33% of people opting to fly with this airline when traveling to Milwaukee. Keep in mind that there are 4 different airlines that fly to Milwaukee on a routine basis, so you have a few additional options to choose from.

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?

The number of operators available for flights from Lambert-St Louis Airport to Milwaukee-Mitchell Airport is 3 as of June 2026.

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.

$106 Cheap Flights from St. Louis to Milwaukee in 2026

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Find the cheapest flights from St. Louis to Milwaukee

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:00 am - 11:07 am

STL

MKE

6h 07m

1 stop

8:14 pm - 12:27 am

MKE

STL

4h 13m

1 stop

$211American Airlines

Thu, Sep 24 - Mon, Sep 28

6:00 am - 9:53 am

STL

MKE

3h 53m

1 stop

5:00 am - 8:39 am

MKE

STL

3h 39m

1 stop

$237United Airlines

Wed, Jul 29 - Tue, Aug 4

7:05 pm - 10:29 pm

STL

MKE

3h 24m

1 stop

7:23 pm - 11:29 pm

MKE

STL

4h 06m

1 stop

$244United Airlines

Wed, Jul 29 - Wed, Aug 5

8:30 am - 9:45 am

STL

MKE

1h 15mnonstop

8:20 am - 9:35 am

MKE

STL

1h 15mnonstop

$253Southwest

Wed, Jul 29 - Wed, Aug 5

6:00 am - 9:53 am

STL

MKE

3h 53m

1 stop

7:23 pm - 11:29 pm

MKE

STL

4h 06m

1 stop

$255United Airlines

Thu, Aug 6 - Mon, Aug 10

2:18 pm - 6:04 pm

STL

MKE

3h 46m

1 stop

5:50 pm - 11:18 pm

MKE

STL

5h 28m

1 stop

$263Delta

Wed, Oct 7 - Wed, Oct 14

7:05 pm - 8:15 pm

STL

MKE

1h 10mnonstop

4:25 pm - 5:40 pm

MKE

STL

1h 15mnonstop

$266Southwest

Thu, Sep 17 - Tue, Sep 22

6:00 am - 11:02 am

STL

MKE

5h 02m

1 stop

6:48 pm - 12:14 am

MKE

STL

5h 26m

1 stop

$268American Airlines

Fri, Aug 14 - Mon, Aug 17

7:05 pm - 8:15 pm

STL

MKE

1h 10mnonstop

6:40 am - 11:20 am

MKE

STL

4h 40m

1 stop

$276Southwest

Thu, Sep 17 - Tue, Sep 22

3:15 pm - 10:25 pm

STL

MKE

7h 10m

2 stops

8:10 am - 1:15 pm

MKE

STL

5h 05m

1 stop

$278Southwest

Wed, Jul 29 - Tue, Aug 4

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United Airlines flights from St. Louis to Milwaukee

Our best United Airlines deals on St. Louis to Milwaukee flight tickets

United Airlines

Jul 29

STL6:00 amLambert-St Louis

3h 53m

1 stop

MKE9:53 amMilwaukee-Mitchell

Aug 4

MKE5:00 amMilwaukee-Mitchell

3h 39m

1 stop

STL8:39 amLambert-St Louis

$237

United Airlines

Jul 29

STL7:05 pmLambert-St Louis

3h 24m

1 stop

MKE10:29 pmMilwaukee-Mitchell

Aug 5

MKE7:23 pmMilwaukee-Mitchell

4h 06m

1 stop

STL11:29 pmLambert-St Louis

$244

United Airlines

Aug 6

STL6:00 amLambert-St Louis

3h 53m

1 stop

MKE9:53 amMilwaukee-Mitchell

Aug 10

MKE7:23 pmMilwaukee-Mitchell

4h 06m

1 stop

STL11:29 pmLambert-St Louis

$255

Southwest flights from St. Louis to Milwaukee

Our best Southwest deals on St. Louis to Milwaukee flight tickets

Southwest

Jul 29

STL9:15 pmLambert-St Louis

1h 15m

MKE10:30 pmMilwaukee-Mitchell

Aug 4

MKE4:25 pmMilwaukee-Mitchell

1h 15m

STL5:40 pmLambert-St Louis

$253

Southwest

Jul 22

STL9:15 pmLambert-St Louis

1h 15m

MKE10:30 pmMilwaukee-Mitchell

Jul 29

MKE5:00 amMilwaukee-Mitchell

5h 45m

1 stop

STL10:45 amLambert-St Louis

$263

Southwest

Sep 17

STL7:05 pmLambert-St Louis

1h 10m

MKE8:15 pmMilwaukee-Mitchell

Sep 22

MKE4:25 pmMilwaukee-Mitchell

1h 15m

STL5:40 pmLambert-St Louis

$266

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Thu 9/24

5:00 am-11:07 am

1 stop6h 07m

Milwaukee-Mitchell

Mon 9/28

8:14 pm-12:27 am

1 stop4h 13m

$211

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 7/29

6:00 am-9:53 am

1 stop3h 53m

Milwaukee-Mitchell

Tue 8/4

5:00 am-8:39 am

1 stop3h 39m

$237

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 7/29

7:05 pm-10:29 pm

1 stop3h 24m

Milwaukee-Mitchell

Wed 8/5

7:23 pm-11:29 pm

1 stop4h 06m

$244

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 7/29

8:30 am-9:45 am

Nonstop1h 15m

Milwaukee-Mitchell

Wed 8/5

8:20 am-9:35 am

Nonstop1h 15m

$253

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Thu 8/6

6:00 am-9:53 am

1 stop3h 53m

Milwaukee-Mitchell

Mon 8/10

7:23 pm-11:29 pm

1 stop4h 06m

$255

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 10/7

2:18 pm-6:04 pm

1 stop3h 46m

Milwaukee-Mitchell

Wed 10/14

5:50 pm-11:18 pm

1 stop5h 28m

$263

Quickest round-trip

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Thu 9/17

7:05 pm-8:15 pm

Nonstop1h 10m

Milwaukee-Mitchell

Tue 9/22

4:25 pm-5:40 pm

Nonstop1h 15m

$266

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Fri 8/14

6:00 am-11:02 am

1 stop5h 02m

Milwaukee-Mitchell

Mon 8/17

6:48 pm-12:14 am

1 stop5h 26m

$268

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Thu 9/17

7:05 pm-8:15 pm

Nonstop1h 10m

Milwaukee-Mitchell

Tue 9/22

6:40 am-11:20 am

1 stop4h 40m

$276

St. LouisMilwaukee

STL - MKE

STLMKE

Lambert-St Louis

Wed 7/29

3:15 pm-10:25 pm

2 stops7h 10m

Milwaukee-Mitchell

Tue 8/4

8:10 am-1:15 pm

1 stop5h 05m

$278

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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

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 $691. 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 $381. 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 47% 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 June 2026, prices for St. Louis to Milwaukee flights are approximately 38% 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	$175
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 $175. The best round-trip flight deal from St. Louis to Milwaukee found on momondo in the last 72 hours is $271.

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?
The number of operators available for flights from Lambert-St Louis Airport to Milwaukee-Mitchell Airport is 3 as of June 2026.
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?
Based on momondo bookings for flights between St. Louis and Milwaukee, the leading plane model is Boeing 737 MAX 8, making up 34.21% of the total bookings. Other popular models include Boeing 737-800 Passenger/BBJ2 (winglets) with 28.95%, Airbus A319 with 5.26%, and Airbus A320-100/200 with 5.26%.
What is the most popular airline from St. Louis to Milwaukee?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Milwaukee is Southwest, representing 75% of all bookings. The subsequent popular airlines are United Airlines at 15% and American Airlines at 10%.

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 Airlines	PriceFrom $117	Free Cancellation	Rating 7.4 9,888 reviews	Search United Airlines flights
Southwest	PriceFrom $205	Free Cancellation	Rating 7.9 4,243 reviews	Search Southwest flights
American Airlines	PriceFrom $266	Free Cancellation	Rating 7.1 11,757 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 10 flights/week on average for this route. A good Southwest flight deal for St. Louis to Milwaukee starts from $205 round-trip, up to an average price of $379. Our users have rated Southwest at 7.9/10.
United Airlines Flights From St. Louis to Milwaukee
The best United Airlines deal for St. Louis to Milwaukee flight tickets found on momondo in the last 72 hours was $117, round-trip. It should be noted that an average United Airlines flight deal for this route in this time was higher, at $336 round-trip. United Airlines operates 6 flights out of St. Louis into Milwaukee in an average week, so prices vary by time and availability. 9,888 United Airlines reviews by users on momondo have scored the airline at 7.4/10.

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Oak Creek

Mequon

Glendale

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Port Washington

Kohler

New Berlin

Grafton

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

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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?

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Cheap flights from St. Louis to Milwaukee from $106

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 9/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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United Airlines flights from St. Louis to Milwaukee

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

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

What is the cheapest month to fly to Milwaukee?

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

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

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

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

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

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

What is the cheapest airline that flies from Lambert-St Louis to Milwaukee-Mitchell?

What airlines fly to Milwaukee?

How many flights depart from St. Louis to Milwaukee on average per day?

How many flights depart from St. Louis to Milwaukee on average per week?

When to book flights from St. Louis to Milwaukee

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

Fastest flight time

Direct flights

Airports in Milwaukee

Frequently asked questions about flying 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

Southwest Flights From St. Louis to Milwaukee

United Airlines Flights From St. Louis to Milwaukee

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An easier way to manage your Milwaukee trip

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