Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Milwaukee to St. Louis from $86

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 3/17. 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.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Milwaukee to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:35 pm - 11:19 pm
MKE
-
STL
28h 44m
1 stop
Frontier Logo
9:05 pm - 5:02 pm
STL
-
MKE
19h 57m
1 stop
$215Frontier
Wed, Mar 11 - Sun, Mar 15
United Airlines Logo
5:10 am - 8:25 am
MKE
-
STL
3h 15m
1 stop
United Airlines Logo
7:45 am - 1:11 pm
STL
-
MKE
5h 26m
1 stop
$218United Airlines
Tue, Apr 28 - Thu, Apr 30
United Airlines Logo
6:50 am - 12:22 pm
MKE
-
STL
5h 32m
1 stop
United Airlines Logo
7:45 am - 11:32 am
STL
-
MKE
3h 47m
1 stop
$236United Airlines
Sat, Apr 11 - Tue, Apr 14
United Airlines Logo
2:32 pm - 9:08 pm
MKE
-
STL
6h 36m
1 stop
United Airlines Logo
6:30 am - 10:00 am
STL
-
MKE
3h 30m
1 stop
$247United Airlines
Mon, Apr 6 - Sat, Apr 11
Southwest Logo
2:55 pm - 4:15 pm
MKE
-
STL
1h 20mnonstop
Southwest Logo
8:25 am - 9:40 am
STL
-
MKE
1h 15mnonstop
$248Southwest
Sat, Apr 11 - Tue, Apr 14
United Airlines Logo
5:29 pm - 9:16 pm
MKE
-
STL
3h 47m
1 stop
United Airlines Logo
1:13 pm - 7:51 pm
STL
-
MKE
6h 38m
1 stop
$257United Airlines
Tue, Jul 21 - Sun, Jul 26
Southwest Logo
2:55 pm - 4:15 pm
MKE
-
STL
1h 20mnonstop
Southwest Logo
1:25 pm - 5:15 pm
STL
-
MKE
3h 50m
1 stop
$258Southwest
Sat, Apr 11 - Tue, Apr 14
United Airlines Logo
2:54 pm - 9:07 pm
MKE
-
STL
6h 13m
1 stop
United Airlines Logo
7:00 pm - 10:43 pm
STL
-
MKE
3h 43m
1 stop
$259United Airlines
Thu, Mar 5 - Sun, Mar 8
Frontier Logo
9:01 pm - 7:07 am
MKE
-
STL
10h 06m
1 stop
Frontier Logo
9:05 pm - 5:02 pm
STL
-
MKE
19h 57m
1 stop
$260Frontier
Fri, Mar 13 - Sun, Mar 15
Southwest Logo
4:50 pm - 10:45 pm
MKE
-
STL
5h 55m
1 stop
Southwest Logo
2:30 pm - 9:45 pm
STL
-
MKE
7h 15m
2 stops
$262Southwest
Fri, Apr 10 - Tue, Apr 14

Southwest flights from Milwaukee to St. Louis

Our best Southwest deals on Milwaukee to St. Louis flight tickets
Southwest
Apr 11
MKE2:55 pmMilwaukee-Mitchell
1h 20m
STL4:15 pmLambert-St Louis
Apr 14
STL8:25 amLambert-St Louis
1h 15m
MKE9:40 amMilwaukee-Mitchell
$248
Southwest
Apr 11
MKE2:55 pmMilwaukee-Mitchell
1h 20m
STL4:15 pmLambert-St Louis
Apr 14
STL1:25 pmLambert-St Louis
3h 50m
1 stop
MKE5:15 pmMilwaukee-Mitchell
$258
Southwest
Apr 10
MKE4:50 pmMilwaukee-Mitchell
5h 55m
1 stop
STL10:45 pmLambert-St Louis
Apr 14
STL2:30 pmLambert-St Louis
7h 15m
2 stops
MKE9:45 pmMilwaukee-Mitchell
$262

American Airlines flights from Milwaukee to St. Louis

Our best American Airlines deals on Milwaukee to St. Louis flight tickets
American Airlines
Mar 24
MKE8:00 amMilwaukee-Mitchell
5h 16m
1 stop
STL1:16 pmLambert-St Louis
Mar 26
STL6:00 amLambert-St Louis
5h 44m
1 stop
MKE11:44 amMilwaukee-Mitchell
$263
American Airlines
May 1
MKE8:11 amMilwaukee-Mitchell
8h 30m
1 stop
STL4:41 pmLambert-St Louis
May 3
STL7:05 amLambert-St Louis
10h 06m
1 stop
MKE5:11 pmMilwaukee-Mitchell
$305
American Airlines
Feb 26
MKE5:00 amMilwaukee-Mitchell
5h 03m
1 stop
STL10:03 amLambert-St Louis
Mar 1
STL6:00 amLambert-St Louis
5h 56m
1 stop
MKE11:56 amMilwaukee-Mitchell
$397

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 February 22, 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

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 3/11

6:35 pm-11:19 pm

1 stop28h 44m

Lambert-St Louis

Sun 3/15

9:05 pm-5:02 pm

1 stop19h 57m

$215

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 4/28

5:10 am-8:25 am

1 stop3h 15m

Lambert-St Louis

Thu 4/30

7:45 am-1:11 pm

1 stop5h 26m

$218

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sat 4/11

6:50 am-12:22 pm

1 stop5h 32m

Lambert-St Louis

Tue 4/14

7:45 am-11:32 am

1 stop3h 47m

$236

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Mon 4/6

2:32 pm-9:08 pm

1 stop6h 36m

Lambert-St Louis

Sat 4/11

6:30 am-10:00 am

1 stop3h 30m

$247

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sat 4/11

2:55 pm-4:15 pm

Nonstop1h 20m

Lambert-St Louis

Tue 4/14

8:25 am-9:40 am

Nonstop1h 15m

$248

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 7/21

5:29 pm-9:16 pm

1 stop3h 47m

Lambert-St Louis

Sun 7/26

1:13 pm-7:51 pm

1 stop6h 38m

$257

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sat 4/11

2:55 pm-4:15 pm

Nonstop1h 20m

Lambert-St Louis

Tue 4/14

1:25 pm-5:15 pm

1 stop3h 50m

$258

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Thu 3/5

2:54 pm-9:07 pm

1 stop6h 13m

Lambert-St Louis

Sun 3/8

7:00 pm-10:43 pm

1 stop3h 43m

$259

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Fri 3/13

9:01 pm-7:07 am

1 stop10h 06m

Lambert-St Louis

Sun 3/15

9:05 pm-5:02 pm

1 stop19h 57m

$260

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Fri 4/10

4:50 pm-10:45 pm

1 stop5h 55m

Lambert-St Louis

Tue 4/14

2:30 pm-9:45 pm

2 stops7h 15m

$262

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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, 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 $332. 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 $445. 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 evening is when there is more demand to fly to St. Louis, so prices are often more expensive at around $509 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 February 2026, prices for Milwaukee to St. Louis flights are approximately 103% 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

$162

Fastest flight time

1h 20m

Direct flights

Tue, Wed, Thu, 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 $162. The best round-trip flight deal from Milwaukee to St. Louis found on momondo in the last 72 hours is $330.
The fastest flight from Milwaukee to St. Louis takes 1h 20m
Direct flights go from Milwaukee to St. Louis on Tuesday, Wednesday, Thursday, 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

  • 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 20m, 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
9,341 reviews
Search United Airlines flights
SouthwestPriceFrom $227Free CancellationRating
8.0
4,299 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 7 flights/week on average for this route. A good Southwest flight deal for Milwaukee to St. Louis starts from $227 round-trip, up to an average price of $373. 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
Florissant
O'Fallon
St. Peters
Collinsville
Wentzville
Fenton
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
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

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 3/24
Tue 3/31
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States