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Cheap flights from Milwaukee to St. Louis from $81

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 9/10. 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

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.
Southwest Logo
4:50 pm - 6:05 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
1h 15mnonstop
Southwest Logo
8:25 am - 9:35 amSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
1h 10mnonstop
$220Southwest
Thu, Sep 24 - Mon, Sep 28
American Airlines Logo
8:14 pm - 12:27 amMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 13m1 stop Chicago O'Hare Intl
American Airlines Logo
5:00 am - 11:07 amSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
6h 07m1 stop Chicago O'Hare Intl
$220American Airlines
Thu, Sep 24 - Thu, Oct 1
Delta Logo
9:37 am - 3:14 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
5h 37m1 stop Detroit Metropolitan Wayne County
Delta Logo
6:15 am - 10:04 amSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
3h 49m1 stop Minneapolis St Paul
$221Delta
Sat, Sep 26 - Sat, Oct 3
Southwest Logo
1:05 pm - 7:05 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
6h 00m1 stop Kansas City
Southwest Logo
3:20 pm - 10:15 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
6h 55m1 stop Baltimore/Washington
$221Southwest
Mon, Oct 5 - Wed, Oct 7
American Airlines Logo
5:00 am - 8:24 amMKE  Milwaukee-Mitchell-STL Lambert-St Louis
3h 24m1 stop Chicago O'Hare Intl
American Airlines Logo
5:18 pm - 9:54 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
4h 36m1 stop Chicago O'Hare Intl
$221American Airlines
Mon, Sep 7 - Mon, Sep 14
Southwest Logo
4:20 pm - 10:10 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
5h 50m1 stop Chicago Midway
Southwest Logo
6:15 pm - 9:25 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
3h 10m1 stop Chicago Midway
$221Southwest
Mon, Sep 21 - Thu, Sep 24
Southwest Logo
3:45 pm - 11:10 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
7h 25m1 stop Tampa
Southwest Logo
4:05 pm - 9:30 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
5h 25m1 stop Chicago Midway
$221Southwest
Mon, Oct 19 - Wed, Oct 21
United Airlines Logo
10:19 am - 2:57 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 38m1 stop Chicago O'Hare Intl
United Airlines Logo
6:00 am - 10:00 amSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
4h 00m1 stop Chicago O'Hare Intl
$278United Airlines
Thu, Aug 27 - Mon, Aug 31
United Airlines Logo
10:19 am - 2:57 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 38m1 stop Chicago O'Hare Intl
United Airlines Logo
6:54 pm - 10:36 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
3h 42m1 stop Chicago O'Hare Intl
$291United Airlines
Wed, Sep 2 - Sat, Sep 5
United Airlines Logo
11:18 am - 3:38 pmMKE  Milwaukee-Mitchell-STL Lambert-St Louis
4h 20m1 stop Chicago O'Hare Intl
United Airlines Logo
9:30 am - 12:38 pmSTL  Lambert-St Louis-MKE Milwaukee-Mitchell
3h 08m1 stop Chicago O'Hare Intl
$335United Airlines
Fri, Aug 28 - Sun, Aug 30

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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
Sep 7
MKE5:00 amMilwaukee-Mitchell
3h 24m
1 stop
STL8:24 amLambert-St Louis
Sep 11
STL5:00 amLambert-St Louis
6h 07m
1 stop
MKE11:07 amMilwaukee-Mitchell
$239
American Airlines
Sep 4
MKE8:20 amMilwaukee-Mitchell
4h 34m
1 stop
STL12:54 pmLambert-St Louis
Sep 6
STL8:07 pmLambert-St Louis
11h 42m
1 stop
MKE7:49 amMilwaukee-Mitchell
$266
American Airlines
Sep 7
MKE5:00 amMilwaukee-Mitchell
3h 24m
1 stop
STL8:24 amLambert-St Louis
Sep 11
STL5:00 amLambert-St Louis
6h 07m
1 stop
MKE11:07 amMilwaukee-Mitchell
$272

Southwest flights from Milwaukee to St. Louis

Our best Southwest deals on Milwaukee to St. Louis flight tickets
Southwest
Sep 24
MKE4:50 pmMilwaukee-Mitchell
1h 15m
STL6:05 pmLambert-St Louis
Sep 28
STL8:25 amLambert-St Louis
1h 10m
MKE9:35 amMilwaukee-Mitchell
$220
Southwest
Sep 24
MKE4:20 pmMilwaukee-Mitchell
5h 50m
1 stop
STL10:10 pmLambert-St Louis
Sep 28
STL6:15 pmLambert-St Louis
3h 10m
1 stop
MKE9:25 pmMilwaukee-Mitchell
$221
Southwest
Sep 24
MKE4:20 pmMilwaukee-Mitchell
5h 50m
1 stop
STL10:10 pmLambert-St Louis
Oct 1
STL9:50 pmLambert-St Louis
1h 15m
MKE11:05 pmMilwaukee-Mitchell
$225

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 August 13, 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
Quickest round-trip

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Thu 9/24

4:50 pm-6:05 pm

Nonstop1h 15m

Lambert-St Louis

Mon 9/28

8:25 am-9:35 am

Nonstop1h 10m

$220

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Thu 9/24

8:14 pm-12:27 am

1 stop4h 13m

Lambert-St Louis

Thu 10/1

5:00 am-11:07 am

1 stop6h 07m

$220

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Sat 9/26

9:37 am-3:14 pm

1 stop5h 37m

Lambert-St Louis

Sat 10/3

6:15 am-10:04 am

1 stop3h 49m

$221

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Mon 10/5

1:05 pm-7:05 pm

1 stop6h 00m

Lambert-St Louis

Wed 10/7

3:20 pm-10:15 pm

1 stop6h 55m

$221

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Mon 9/7

5:00 am-8:24 am

1 stop3h 24m

Lambert-St Louis

Mon 9/14

5:18 pm-9:54 pm

1 stop4h 36m

$221

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Mon 9/21

4:20 pm-10:10 pm

1 stop5h 50m

Lambert-St Louis

Thu 9/24

6:15 pm-9:25 pm

1 stop3h 10m

$221

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Mon 10/19

3:45 pm-11:10 pm

1 stop7h 25m

Lambert-St Louis

Wed 10/21

4:05 pm-9:30 pm

1 stop5h 25m

$221

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Thu 8/27

10:19 am-2:57 pm

1 stop4h 38m

Lambert-St Louis

Mon 8/31

6:00 am-10:00 am

1 stop4h 00m

$278

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Wed 9/2

10:19 am-2:57 pm

1 stop4h 38m

Lambert-St Louis

Sat 9/5

6:54 pm-10:36 pm

1 stop3h 42m

$291

MilwaukeeSt. Louis

MKE Milwaukee-Mitchell - STL Lambert-St Louis

MKESTL

Milwaukee-Mitchell

Fri 8/28

11:18 am-3:38 pm

1 stop4h 20m

Lambert-St Louis

Sun 8/30

9:30 am-12:38 pm

1 stop3h 08m

$335

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 cheapest month to fly to St. Louis?

In general, September 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 $325. The month of May is another great option to travel to St. Louis, with average flight prices from Milwaukee averaging around $336.

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 $347. 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 $516. 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 $425 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?

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 August 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

$149

Fastest flight time

1h 15m

Direct flights

Mon, Tue, Wed, Fri, Sat and Sun

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from Milwaukee in the past 72 hours is $149. The best round-trip flight deal from Milwaukee to St. Louis found on momondo in the last 72 hours is $325.
The fastest flight from Milwaukee to St. Louis takes 1h 15m
Direct flights go from Milwaukee to St. Louis on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. 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
10,112 reviews
Search United Airlines flights
SouthwestPriceFrom $254Free CancellationRating
8.0
4,219 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 $254 round-trip, up to an average price of $413. 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
Fairview Heights
Hermann
St. Peters
Maryland Heights
Collinsville
Florissant
Alton
O'Fallon
Farmington
Clayton
Fenton
Festus
Wentzville
Eureka
Edwardsville
Litchfield
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.

An easier way to manage your St. Louis trip

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