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

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

What airlines fly to St. Louis?

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to St. Louis from Milwaukee according to our data. United Airlines is the first choice among our users, with 58% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 6 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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

1 flights are operational daily from Milwaukee to St. Louis as of June 2026. The most popular departure time for this route is 7:00AM, with 50% of flights per day taking off at noon.

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

The number of flights available between Milwaukee and St. Louis is 9 per week as of June 2026. The most frequent departure day is Mon, with 22% of weekly flights leaving on this day.

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?

The number of operators available for flights from Milwaukee-Mitchell Airport to Lambert-St Louis Airport is 2 as of June 2026.

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.

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

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

Prices are currently low for flights on this route. Typical prices usually range from $396 to $508. The lowest price recently found on this route was $211.

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Milwaukee to St. Louis

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:55 pm - 12:16 am

MKE

STL

5h 21m

1 stop

6:00 am - 11:02 am

STL

MKE

5h 02m

1 stop

$211American Airlines

Tue, Aug 4 - Tue, Aug 11

8:43 am - 12:14 am

MKE

STL

15h 31m

1 stop

4:10 pm - 7:58 am

STL

MKE

15h 48m

1 stop

$222Frontier

Tue, Aug 18 - Wed, Aug 19

8:14 pm - 10:20 am

MKE

STL

14h 06m

1 stop

11:01 am - 4:03 pm

STL

MKE

5h 02m

1 stop

$250American Airlines

Mon, Sep 14 - Wed, Sep 16

8:20 am - 9:35 am

MKE

STL

1h 15mnonstop

6:45 pm - 7:55 pm

STL

MKE

1h 10mnonstop

$253Southwest

Tue, Aug 4 - Tue, Aug 11

8:43 am - 11:59 pm

MKE

STL

15h 16m

1 stop

4:09 pm - 7:58 am

STL

MKE

15h 49m

1 stop

$256Frontier

Sun, Jul 12 - Sat, Jul 18

4:25 pm - 5:40 pm

MKE

STL

1h 15mnonstop

2:45 pm - 8:30 pm

STL

MKE

5h 45m

1 stop

$263Southwest

Tue, Aug 4 - Tue, Aug 11

7:03 pm - 12:16 am

MKE

STL

5h 13m

1 stop

5:00 am - 11:02 am

STL

MKE

6h 02m

1 stop

$268American Airlines

Sun, Aug 2 - Sat, Aug 8

8:20 am - 9:35 am

MKE

STL

1h 15mnonstop

8:30 am - 9:40 am

STL

MKE

1h 10mnonstop

$277Southwest

Tue, Aug 18 - Wed, Aug 19

4:25 pm - 5:40 pm

MKE

STL

1h 15mnonstop

2:15 pm - 3:30 pm

STL

MKE

1h 15mnonstop

$278Southwest

Tue, Aug 4 - Sat, Aug 8

8:30 am - 12:13 pm

MKE

STL

3h 43m

1 stop

5:36 pm - 10:59 pm

STL

MKE

5h 23m

1 stop

$281United Airlines

Wed, Oct 14 - Sat, Oct 17

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American Airlines flights from Milwaukee to St. Louis

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

American Airlines

Aug 4

MKE6:55 pmMilwaukee-Mitchell

5h 21m

1 stop

STL12:16 amLambert-St Louis

Aug 11

STL6:00 amLambert-St Louis

5h 02m

1 stop

MKE11:02 amMilwaukee-Mitchell

$211

American Airlines

Sep 14

MKE8:14 pmMilwaukee-Mitchell

14h 06m

1 stop

STL10:20 amLambert-St Louis

Sep 16

STL11:01 amLambert-St Louis

5h 02m

1 stop

MKE4:03 pmMilwaukee-Mitchell

$250

American Airlines

Aug 2

MKE7:03 pmMilwaukee-Mitchell

5h 13m

1 stop

STL12:16 amLambert-St Louis

Aug 8

STL5:00 amLambert-St Louis

6h 02m

1 stop

MKE11:02 amMilwaukee-Mitchell

$268

Southwest flights from Milwaukee to St. Louis

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

Southwest

Aug 4

MKE8:20 amMilwaukee-Mitchell

1h 15m

STL9:35 amLambert-St Louis

Aug 11

STL6:45 pmLambert-St Louis

1h 10m

MKE7:55 pmMilwaukee-Mitchell

$253

Southwest

Aug 4

MKE4:25 pmMilwaukee-Mitchell

1h 15m

STL5:40 pmLambert-St Louis

Aug 11

STL2:45 pmLambert-St Louis

5h 45m

1 stop

MKE8:30 pmMilwaukee-Mitchell

$263

Southwest

Aug 18

MKE8:20 amMilwaukee-Mitchell

1h 15m

STL9:35 amLambert-St Louis

Aug 19

STL8:30 amLambert-St Louis

1h 10m

MKE9:40 amMilwaukee-Mitchell

$277

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 8/4

6:55 pm-12:16 am

1 stop5h 21m

Lambert-St Louis

Tue 8/11

6:00 am-11:02 am

1 stop5h 02m

$211

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 8/18

8:43 am-12:14 am

1 stop15h 31m

Lambert-St Louis

Wed 8/19

4:10 pm-7:58 am

1 stop15h 48m

$222

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Mon 9/14

8:14 pm-10:20 am

1 stop14h 06m

Lambert-St Louis

Wed 9/16

11:01 am-4:03 pm

1 stop5h 02m

$250

Quickest round-trip

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 8/4

8:20 am-9:35 am

Nonstop1h 15m

Lambert-St Louis

Tue 8/11

6:45 pm-7:55 pm

Nonstop1h 10m

$253

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sun 7/12

8:43 am-11:59 pm

1 stop15h 16m

Lambert-St Louis

Sat 7/18

4:09 pm-7:58 am

1 stop15h 49m

$256

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 8/4

4:25 pm-5:40 pm

Nonstop1h 15m

Lambert-St Louis

Tue 8/11

2:45 pm-8:30 pm

1 stop5h 45m

$263

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sun 8/2

7:03 pm-12:16 am

1 stop5h 13m

Lambert-St Louis

Sat 8/8

5:00 am-11:02 am

1 stop6h 02m

$268

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 8/18

8:20 am-9:35 am

Nonstop1h 15m

Lambert-St Louis

Wed 8/19

8:30 am-9:40 am

Nonstop1h 10m

$277

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 8/4

4:25 pm-5:40 pm

Nonstop1h 15m

Lambert-St Louis

Sat 8/8

2:15 pm-3:30 pm

Nonstop1h 15m

$278

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 10/14

8:30 am-12:13 pm

1 stop3h 43m

Lambert-St Louis

Sat 10/17

5:36 pm-10:59 pm

1 stop5h 23m

$281

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 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

Prices

Airlines

Other information

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

What is the cheapest month to fly to St. Louis?

In general, October 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 $306. The month of September is another great option to travel to St. Louis, with average flight prices from Milwaukee averaging around $331.

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 Wednesday when prices can be found for as low as $342. 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 Sunday because tickets tend to average around $461. 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 at noon is the least expensive time of day to depart. momondo users have found prices as low as $331 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $403 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 to St. Louis flights?

There is only 1 cabin class available to choose from on Milwaukee to 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 21% 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 June 2026, prices for Milwaukee to St. Louis flights are approximately 72% more expensive 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	$174
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 $174. The best round-trip flight deal from Milwaukee to St. Louis found on momondo in the last 72 hours is $334.

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 in St. Louis. From Milwaukee there are direct flights to Lambert-St Louis (STL).

Search flight deals

Frequently asked questions about flying from Milwaukee to St. Louis

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?
The number of operators available for flights from Milwaukee-Mitchell Airport to Lambert-St Louis Airport is 2 as of June 2026.
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?
momondo data reveals that the most frequently booked plane model on the route from Milwaukee to St. Louis is Boeing 737 MAX 8, representing 14.01% of all bookings. The subsequent popular models are Boeing 737-800 at 8.21%, Boeing 737-900 at 6.76%, and Airbus A321-100/200 at 6.76%.
What is the most popular airline from Milwaukee to St. Louis?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Milwaukee to St. Louis is Southwest (86% of total bookings). The next most popular airline is United Airlines (14%).

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 Airlines	PriceFrom $161	Free Cancellation	Rating 7.4 9,874 reviews		Search United Airlines flights
Southwest	PriceFrom $254	Free Cancellation	Rating 7.9 4,242 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 9 flights/week on average for this route. A good Southwest flight deal for Milwaukee to St. Louis starts from $254 round-trip, up to an average price of $413. Our users have rated Southwest at 7.9/10.

St. Charles

Chesterfield

Fairview Heights

Hermann

Maryland Heights

Florissant

O'Fallon

Collinsville

St. Peters

Alton

Wentzville

Farmington

Fenton

Clayton

Festus

Eureka

Litchfield

Edwardsville

Grafton

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.

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Cheap flights from Milwaukee to St. Louis 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 Milwaukee to St. Louis departing on 8/15. 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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American Airlines flights from Milwaukee to St. Louis

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

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

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

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

What is the cheapest month to fly to St. Louis?

What is the cheapest day to depart on your flight to St. Louis?

What is the cheapest time of day to depart on your flight to St. Louis?

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

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

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

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

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

What airlines fly to St. Louis?

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

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

When to book flights from Milwaukee to St. Louis

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

Fastest flight time

Direct flights

Airports in St. Louis

Frequently asked questions about flying 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

Southwest Flights From Milwaukee to St. Louis

Traveling to a place near St. Louis?

Why use momondo?

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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