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Cheap flights from Milwaukee to St. Louis from $99

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 6/17. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Milwaukee to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
7:01 am - 11:47 am
MKE
-
STL
4h 46m
1 stop
American Airlines Logo
7:30 am - 12:50 pm
STL
-
MKE
5h 20m
1 stop
$209American Airlines
Tue, May 19 - Tue, Jun 9
Southwest Logo
11:30 am - 8:00 pm
MKE
-
STL
8h 30m
2 stops
Southwest Logo
12:40 pm - 6:15 pm
STL
-
MKE
5h 35m
1 stop
$215Southwest
Tue, May 19 - Tue, Jun 9
Southwest Logo
9:10 am - 4:00 pm
MKE
-
STL
6h 50m
1 stop
Southwest Logo
9:15 pm - 10:25 pm
STL
-
MKE
1h 10mnonstop
$219Southwest
Tue, May 19 - Tue, Jun 9
Southwest Logo
6:25 am - 1:00 pm
MKE
-
STL
6h 35m
2 stops
Southwest Logo
3:15 pm - 10:20 pm
STL
-
MKE
7h 05m
2 stops
$220Southwest
Tue, May 19 - Tue, Jun 9
Delta Logo
9:10 am - 2:31 pm
MKE
-
STL
5h 21m
1 stop
Delta Logo
6:30 am - 11:11 am
STL
-
MKE
4h 41m
1 stop
$223Delta
Tue, Aug 25 - Sat, Aug 29
Southwest Logo
4:40 pm - 6:00 pm
MKE
-
STL
1h 20mnonstop
Southwest Logo
9:15 pm - 10:25 pm
STL
-
MKE
1h 10mnonstop
$235Southwest
Tue, May 19 - Tue, Jun 9
Delta Logo
9:35 am - 1:10 pm
MKE
-
STL
3h 35m
1 stop
Delta Logo
1:59 pm - 5:55 pm
STL
-
MKE
3h 56m
1 stop
$242Delta
Wed, Jun 3 - Fri, Jun 5
Delta Logo
1:08 pm - 5:16 pm
MKE
-
STL
4h 08m
1 stop
Delta Logo
6:21 am - 11:20 am
STL
-
MKE
4h 59m
1 stop
$243Delta
Thu, May 28 - Mon, Jun 1
Southwest Logo
6:50 am - 2:55 pm
MKE
-
STL
8h 05m
2 stops
Southwest Logo
4:40 pm - 10:15 pm
STL
-
MKE
5h 35m
1 stop
$248Southwest
Thu, May 28 - Mon, Jun 1
Southwest Logo
4:40 pm - 6:00 pm
MKE
-
STL
1h 20mnonstop
Southwest Logo
7:15 pm - 12:15 am
STL
-
MKE
5h 00m
1 stop
$252Southwest
Wed, Jun 3 - Fri, Jun 5

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Delta flights from Milwaukee to St. Louis

Our best Delta deals on Milwaukee to St. Louis flight tickets
Delta
Aug 25
MKE9:10 amMilwaukee-Mitchell
5h 21m
1 stop
STL2:31 pmLambert-St Louis
Aug 29
STL6:30 amLambert-St Louis
4h 41m
1 stop
MKE11:11 amMilwaukee-Mitchell
$223
Delta
Jun 3
MKE9:35 amMilwaukee-Mitchell
3h 35m
1 stop
STL1:10 pmLambert-St Louis
Jun 5
STL1:59 pmLambert-St Louis
3h 56m
1 stop
MKE5:55 pmMilwaukee-Mitchell
$242
Delta
May 28
MKE1:08 pmMilwaukee-Mitchell
4h 08m
1 stop
STL5:16 pmLambert-St Louis
Jun 1
STL6:21 amLambert-St Louis
4h 59m
1 stop
MKE11:20 amMilwaukee-Mitchell
$243

United Airlines flights from Milwaukee to St. Louis

Our best United Airlines deals on Milwaukee to St. Louis flight tickets
United Airlines
May 22
MKE8:35 amMilwaukee-Mitchell
3h 36m
1 stop
STL12:11 pmLambert-St Louis
May 25
STL6:00 amLambert-St Louis
3h 57m
1 stop
MKE9:57 amMilwaukee-Mitchell
$275
United Airlines
May 19
MKE5:56 pmMilwaukee-Mitchell
3h 17m
1 stop
STL9:13 pmLambert-St Louis
May 20
STL7:45 amLambert-St Louis
5h 26m
1 stop
MKE1:11 pmMilwaukee-Mitchell
$279
United Airlines
May 19
MKE3:25 pmMilwaukee-Mitchell
5h 48m
1 stop
STL9:13 pmLambert-St Louis
May 20
STL7:45 amLambert-St Louis
5h 26m
1 stop
MKE1:11 pmMilwaukee-Mitchell
$285

momondo Fare Finder

 
Customize your flight search to find flights from Milwaukee to St. Louis 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 April 23, 2026.
Use the filters below to find and compare flights from Milwaukee to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 5/19

7:01 am-11:47 am

1 stop4h 46m

Lambert-St Louis

Tue 6/9

7:30 am-12:50 pm

1 stop5h 20m

$209

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 5/19

11:30 am-8:00 pm

2 stops8h 30m

Lambert-St Louis

Tue 6/9

12:40 pm-6:15 pm

1 stop5h 35m

$215

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 5/19

9:10 am-4:00 pm

1 stop6h 50m

Lambert-St Louis

Tue 6/9

9:15 pm-10:25 pm

Nonstop1h 10m

$219

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 5/19

6:25 am-1:00 pm

2 stops6h 35m

Lambert-St Louis

Tue 6/9

3:15 pm-10:20 pm

2 stops7h 05m

$220

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 8/25

9:10 am-2:31 pm

1 stop5h 21m

Lambert-St Louis

Sat 8/29

6:30 am-11:11 am

1 stop4h 41m

$223
Quickest round-trip

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 5/19

4:40 pm-6:00 pm

Nonstop1h 20m

Lambert-St Louis

Tue 6/9

9:15 pm-10:25 pm

Nonstop1h 10m

$235

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 6/3

9:35 am-1:10 pm

1 stop3h 35m

Lambert-St Louis

Fri 6/5

1:59 pm-5:55 pm

1 stop3h 56m

$242

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Thu 5/28

1:08 pm-5:16 pm

1 stop4h 08m

Lambert-St Louis

Mon 6/1

6:21 am-11:20 am

1 stop4h 59m

$243

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Thu 5/28

6:50 am-2:55 pm

2 stops8h 05m

Lambert-St Louis

Mon 6/1

4:40 pm-10:15 pm

1 stop5h 35m

$248

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 6/3

4:40 pm-6:00 pm

Nonstop1h 20m

Lambert-St Louis

Fri 6/5

7:15 pm-12:15 am

1 stop5h 00m

$252

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 St. Louis from

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

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, August 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 $286. The month of October is another great option to travel to St. Louis, with average flight prices from Milwaukee averaging around $287.

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 $329. 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 $452. 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 $396 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 20% 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 April 2026, prices for Milwaukee to St. Louis flights are approximately 48% 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

$189

Fastest flight time

1h 15m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Milwaukee in the past 72 hours is $189. The best round-trip flight deal from Milwaukee to St. Louis found on momondo in the last 72 hours is $366.
The fastest flight from Milwaukee to St. Louis takes 1h 15m
Direct flights go from Milwaukee to St. Louis on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.
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?

  • 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?

  • What is the most popular airline 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
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $161Free CancellationRating
7.4
9,635 reviews
Search United Airlines flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,327 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 11 flights/week on average for this route. A good Southwest flight deal for Milwaukee to St. Louis starts from $177 round-trip, up to an average price of $372. Our users have rated Southwest at 8.0/10.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
Grafton

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.

An easier way to manage your St. Louis trip

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