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$99+ Cheap flights from Milwaukee to St. Louis (MKE - STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
MKE — STL
May 28 — Jun 41
Thu 5/28
Thu 6/4
1 adult, Economy
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Cheap flight deals from Milwaukee to St. Louis

Cheapest flights from Milwaukee to St. Louis
Explore the most affordable flight options available from Milwaukee to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 28, 2026.

This Trip.com deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/179:56 am
MKE
-
STL
1 stop14h 25m
Frontier
Mon 5/184:19 pm
STL
-
MKE
1 stop16h 42m
Frontier
Deal found 4/28$196
This United Airlines deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/165:56 pm
MKE
-
STL
1 stop5h 23m
United Airlines
Tue 5/197:45 am
STL
-
MKE
1 stop3h 46m
United Airlines
Deal found 4/23$211
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:30 am
MKE
-
STL
Nonstop1h 20m
Southwest
Mon 5/258:35 am
STL
-
MKE
Nonstop1h 15m
Southwest
Deal found 4/27$213
This American Airlines deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1611:13 am
MKE
-
STL
1 stop5h 28m
American Airlines
Tue 5/195:20 am
STL
-
MKE
1 stop5h 39m
American Airlines
Deal found 4/24$224
This Southwest deal was found by Cheapflights users on 4/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/1611:50 am
MKE
-
STL
1 stop6h 20m
Southwest
Tue 5/192:30 pm
STL
-
MKE
2 stops7h 15m
Southwest
Deal found 4/23$229
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:20 am
MKE
-
STL
1 stop7h 50m
Southwest
Mon 6/82:30 pm
STL
-
MKE
2 stops8h 15m
Southwest
Deal found 4/28$238
This Southwest deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/235:05 pm
MKE
-
STL
Nonstop1h 20m
Southwest
Fri 6/267:15 pm
STL
-
MKE
1 stop5h 00m
Southwest
Deal found 4/27$252
This American Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:46 pm
MKE
-
STL
1 stop7h 54m
American Airlines
Sat 8/295:11 pm
STL
-
MKE
1 stop5h 46m
American Airlines
Deal found 4/25$254
This United Airlines deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/75:00 am
MKE
-
STL
1 stop3h 41m
United Airlines
Tue 6/96:00 am
STL
-
MKE
1 stop3h 57m
United Airlines
Deal found 4/28$259
This Southwest deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/79:35 am
MKE
-
STL
1 stop5h 25m
Southwest
Mon 6/88:15 am
STL
-
MKE
Nonstop1h 10m
Southwest
Deal found 4/28$260

Find flight deals from Milwaukee to St. Louis

Discover tips and strategies to find the most affordable flight options for your journey from Milwaukee (MKE) to St. Louis (STL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$196
(Trip.com)

One-way from

$99
(Southwest)

Popular in

December

Cheapest in

August

Average price

$385

Good round-trip deal

$366 or less

Good one-way deal

$193 or less
Provider with most accurate pricing for Milwaukee-Mitchell-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Milwaukee-Mitchell-Lambert-St Louis flights.
Search Deals
From Milwaukee-Mitchell to Lambert-St Louis
Search Deals
One-way flight from Milwaukee-Mitchell to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($73 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals
Price to beat on a round-trip flight from Milwaukee-Mitchell to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from Milwaukee-Mitchell to Lambert-St Louis.
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated April 28, 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 - STL

MKESTL

Milwaukee-Mitchell

Wed 7/1

8:05 am-9:25 am

Nonstop1h 20m

Lambert-St Louis

Sun 7/5

6:45 pm-11:35 pm

1 stop4h 50m

$252

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Tue 6/23

8:05 am-9:25 am

Nonstop1h 20m

Lambert-St Louis

Fri 6/26

7:15 pm-12:15 am

1 stop5h 00m

$252

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sun 6/14

5:00 am-8:41 am

1 stop3h 41m

Lambert-St Louis

Tue 6/16

6:00 am-9:57 am

1 stop3h 57m

$257

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 6/10

8:05 am-9:25 am

Nonstop1h 20m

Lambert-St Louis

Fri 6/12

2:30 pm-10:45 pm

2 stops8h 15m

$257

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 7/1

5:29 pm-9:26 pm

1 stop3h 57m

Lambert-St Louis

Sun 7/5

5:33 pm-8:56 pm

1 stop3h 23m

$262

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Sat 5/16

5:40 am-1:35 pm

2 stops7h 55m

Lambert-St Louis

Wed 5/20

5:35 am-10:55 am

1 stop5h 20m

$284

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Fri 10/9

5:50 pm-11:18 pm

1 stop5h 28m

Lambert-St Louis

Sun 10/11

6:30 am-11:27 am

1 stop4h 57m

$307

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Mon 6/8

7:40 am-2:20 pm

1 stop6h 40m

Lambert-St Louis

Thu 6/11

7:15 pm-12:15 am

1 stop5h 00m

$307
Cheapest one-way
Quickest one-way

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 5/20

8:00 am-9:20 am

Nonstop1h 20m

$99

MilwaukeeSt. Louis

MKE - STL

MKESTL

Milwaukee-Mitchell

Wed 5/20

6:49 am-12:47 pm

1 stop5h 58m

$106

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/24

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

Compare providers for flights from Milwaukee to St. Louis

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Milwaukee to St. Louis in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Milwaukee-St. Louis flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Milwaukee-St. Louis flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Milwaukee-St. Louis flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Milwaukee-St. Louis flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Milwaukee-St. Louis flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Milwaukee to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Milwaukee with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Milwaukee to St. Louis

What is the cheapest month to book a flight from Milwaukee to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Milwaukee to St. Louis (average of $286). Flying from Milwaukee to St. Louis in December is currently the most expensive (average of $530). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from MKE to STL?

Find hourly flight availability from Milwaukee to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 28, 2026.

It’s typically best to fly out from Milwaukee to St. Louis at noon. Doing so could potentially save you 16% on the flight price compared to flying in the morning, which is usually more expensive.

How much does it cost to fly round-trip from Milwaukee to St. Louis?

Reviews of airlines servicing St. Louis

Get insights into the airlines that provide service to St. Louis. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to St. Louis. Reviews last updated April 28, 2026.
See what other customers who have flown with Southwest and United Airlines from Milwaukee to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,314 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,314 reviews
Southwest
8.0
Very good
4,314 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,675 reviews
Southwest
8.0
Very good
4,314 reviews

Entertainment

7.5

Overall

8.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Food

7.0

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Milwaukee to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Milwaukee to St. Louis?

    Booking a flight from Milwaukee-Mitchell (MKE) to Lambert-St Louis (STL) is your only option if you wish to fly from Milwaukee to St. Louis. On a typical day, there is 1 flight from Milwaukee-Mitchell to Lambert-St Louis, all of which are around 1h 20m for a nonstop flight. You can also purchase a plane ticket from 2 airlines when you book a flight from Milwaukee-Mitchell to St. Louis.

  • How popular is this Milwaukee to St. Louis flight route?

    The Milwaukee-Mitchell to Lambert-St Louis flight path was viewed by 20 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Milwaukee to St. Louis?

    A quick flight from Milwaukee to St. Louis can take about 1h 20m. United Airlines provides one of the quickest options available for as low as $252. The distance from Milwaukee to St. Louis is about 317 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Milwaukee to St. Louis round-trip?

    Currently priced at $161, United Airlines will fly you from Milwaukee to St. Louis and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Southwest for as low as $177. United Airlines is priced at 56% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest flights from Milwaukee to St. Louis?

    Looking for the cheapest flight from Milwaukee to St. Louis? While on average our users pay $334, our data indicates the cheapest price to be $148. The most popular route (Milwaukee-Mitchell - Lambert-St Louis), is priced around $211.

  • Can I find deals for flights from Milwaukee to St. Louis that include hotel bookings?

    Yes. In addition to deals on Milwaukee to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Milwaukee to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Milwaukee to St. Louis.

  • Can I find deals for business class flights from Milwaukee to St. Louis?

    Yes. Cheapflights offers flight deals from Milwaukee to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Milwaukee to St. Louis?

    Currently, August is the cheapest month in which you can book a flight from Milwaukee to St. Louis (average of $286). Flying from Milwaukee to St. Louis in December is currently the most expensive (average of $530). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Milwaukee to St. Louis

Discover the top 2 airlines that operate flights from Milwaukee to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$161Average$320FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$177Average$372FlexibilityNo cancel feeOn-time63%

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