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Cheap flights from Milwaukee to St. Louis from $76

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 4/30. 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
1 adult, Economy, 0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
1:37 pm - 11:25 pm
MKE
-
STL
9h 48m
1 stop
Frontier Logo
4:59 pm - 11:26 am
STL
-
MKE
18h 27m
1 stop
$199Frontier
Sat, Apr 11 - Wed, Apr 15
Southwest Logo
8:00 am - 9:20 am
MKE
-
STL
1h 20mnonstop
Southwest Logo
9:45 pm - 11:00 pm
STL
-
MKE
1h 15mnonstop
$205Southwest
Tue, Apr 28 - Thu, Apr 30
Southwest Logo
8:00 am - 9:20 am
MKE
-
STL
1h 20mnonstop
Southwest Logo
9:45 pm - 11:00 pm
STL
-
MKE
1h 15mnonstop
$213Southwest
Thu, May 14 - Mon, May 18
Southwest Logo
5:50 am - 11:30 am
MKE
-
STL
5h 40m
1 stop
Southwest Logo
9:45 pm - 11:00 pm
STL
-
MKE
1h 15mnonstop
$215Southwest
Tue, Apr 28 - Thu, Apr 30
Southwest Logo
6:25 am - 1:00 pm
MKE
-
STL
6h 35m
2 stops
Southwest Logo
9:45 pm - 11:00 pm
STL
-
MKE
1h 15mnonstop
$220Southwest
Tue, Apr 28 - Thu, Apr 30
Delta Logo
5:48 pm - 11:13 pm
MKE
-
STL
5h 25m
1 stop
Delta Logo
6:20 am - 10:13 am
STL
-
MKE
3h 53m
1 stop
$223Delta
Tue, Apr 28 - Wed, Apr 29
Southwest Logo
5:50 am - 3:15 pm
MKE
-
STL
9h 25m
2 stops
Southwest Logo
5:00 am - 12:10 pm
STL
-
MKE
7h 10m
1 stop
$230Southwest
Tue, Apr 28 - Thu, Apr 30
Southwest Logo
6:40 am - 1:45 pm
MKE
-
STL
7h 05m
1 stop
Southwest Logo
4:00 pm - 11:10 pm
STL
-
MKE
7h 10m
1 stop
$233Southwest
Thu, May 14 - Mon, May 18
Southwest Logo
11:30 am - 9:15 pm
MKE
-
STL
9h 45m
2 stops
Southwest Logo
4:00 pm - 11:10 pm
STL
-
MKE
7h 10m
1 stop
$238Southwest
Wed, Apr 22 - Thu, Apr 23
Southwest Logo
5:50 am - 3:15 pm
MKE
-
STL
9h 25m
2 stops
Southwest Logo
5:45 am - 3:15 pm
STL
-
MKE
9h 30m
2 stops
$241Southwest
Tue, Apr 28 - Thu, Apr 30

United Airlines flights from Milwaukee to St. Louis

Our best United Airlines deals on Milwaukee to St. Louis flight tickets
United Airlines
May 5
MKE5:10 amMilwaukee-Mitchell
3h 29m
1 stop
STL8:39 amLambert-St Louis
May 10
STL6:30 amLambert-St Louis
3h 15m
1 stop
MKE9:45 amMilwaukee-Mitchell
$248
United Airlines
May 2
MKE5:56 pmMilwaukee-Mitchell
5h 23m
1 stop
STL11:19 pmLambert-St Louis
May 6
STL7:45 amLambert-St Louis
5h 26m
1 stop
MKE1:11 pmMilwaukee-Mitchell
$266
United Airlines
May 2
MKE5:56 pmMilwaukee-Mitchell
3h 17m
1 stop
STL9:13 pmLambert-St Louis
May 6
STL8:21 amLambert-St Louis
4h 50m
1 stop
MKE1:11 pmMilwaukee-Mitchell
$290

Delta flights from Milwaukee to St. Louis

Our best Delta deals on Milwaukee to St. Louis flight tickets
Delta
Apr 28
MKE5:48 pmMilwaukee-Mitchell
5h 25m
1 stop
STL11:13 pmLambert-St Louis
Apr 29
STL6:20 amLambert-St Louis
3h 53m
1 stop
MKE10:13 amMilwaukee-Mitchell
$223
Delta
Apr 30
MKE6:30 amMilwaukee-Mitchell
5h 02m
1 stop
STL11:32 amLambert-St Louis
May 3
STL6:20 amLambert-St Louis
3h 53m
1 stop
MKE10:13 amMilwaukee-Mitchell
$265
Delta
Apr 10
MKE6:59 pmMilwaukee-Mitchell
4h 26m
1 stop
STL11:25 pmLambert-St Louis
Apr 15
STL6:19 amLambert-St Louis
3h 54m
1 stop
MKE10:13 amMilwaukee-Mitchell
$292

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 March 31, 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

Sat 4/11

1:37 pm-11:25 pm

1 stop9h 48m

Lambert-St Louis

Wed 4/15

4:59 pm-11:26 am

1 stop18h 27m

$199
Quickest round-trip

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 4/28

8:00 am-9:20 am

Nonstop1h 20m

Lambert-St Louis

Thu 4/30

9:45 pm-11:00 pm

Nonstop1h 15m

$205

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Thu 5/14

8:00 am-9:20 am

Nonstop1h 20m

Lambert-St Louis

Mon 5/18

9:45 pm-11:00 pm

Nonstop1h 15m

$213

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 4/28

5:50 am-11:30 am

1 stop5h 40m

Lambert-St Louis

Thu 4/30

9:45 pm-11:00 pm

Nonstop1h 15m

$215

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 4/28

6:25 am-1:00 pm

2 stops6h 35m

Lambert-St Louis

Thu 4/30

9:45 pm-11:00 pm

Nonstop1h 15m

$220

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 4/28

5:48 pm-11:13 pm

1 stop5h 25m

Lambert-St Louis

Wed 4/29

6:20 am-10:13 am

1 stop3h 53m

$223

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 4/28

5:50 am-3:15 pm

2 stops9h 25m

Lambert-St Louis

Thu 4/30

5:00 am-12:10 pm

1 stop7h 10m

$230

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Thu 5/14

6:40 am-1:45 pm

1 stop7h 05m

Lambert-St Louis

Mon 5/18

4:00 pm-11:10 pm

1 stop7h 10m

$233

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 4/22

11:30 am-9:15 pm

2 stops9h 45m

Lambert-St Louis

Thu 4/23

4:00 pm-11:10 pm

1 stop7h 10m

$238

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 4/28

5:50 am-3:15 pm

2 stops9h 25m

Lambert-St Louis

Thu 4/30

5:45 am-3:15 pm

2 stops9h 30m

$241

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 $328. 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 $389 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-Mitchell to Lambert-St Louis flights?

There is only 1 cabin class available to choose from on Milwaukee-Mitchell to Lambert-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?

No. A direct flight is the cheapest option for a flight between Milwaukee to St. Louis.

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

As of March 2026, prices for Milwaukee to St. Louis flights are approximately 75% 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

$220

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 $220. The best round-trip flight deal from Milwaukee to St. Louis found on momondo in the last 72 hours is $385.
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

  • 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 $156Free CancellationRating
7.4
9,525 reviews
Search United Airlines flights
SouthwestPriceFrom $177Free CancellationRating
8.0
4,332 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 $371. 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
Alton
Wentzville
Fenton
Farmington
Clayton
Festus
Eureka
Edwardsville
Litchfield
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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