Cheap Flights from Milwaukee (MKE) to St. Louis (CPS)

Popular airlines from General Mitchell Intl. Airport (MKE) to St. Louis, MO (CPS-St. Louis Downtown)

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $456
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $456

Frequently asked questions

How much does a flight from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS) cost?
Snag a cheap one-way flight or cheap return flight from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS)?
Planning your trip for is a good way to save, as it's the cheapest month for flights between MKE and CPS. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS)?
Use the filters on Expedia to compare airlines and find the most affordable carrier that'll take you from MKE to CPS. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS)?
There are no daily nonstop flights available from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS). But you can opt for flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be soaring above the clouds in no time.
What day of the week has the most flights from MKE to CPS?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS)?
To land at St. Louis Downtown Airport (CPS) without delays, pick a flight that leaves from General Mitchell Intl. Airport (MKE) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for East St. Louis from General Mitchell Intl. Airport (MKE)?
If you're on a direct flight from General Mitchell Intl. Airport (MKE) to East St. Louis, Lambert-St. Louis Intl. Airport (STL) is the only airport you can land at.
Is it cheaper to buy a plane ticket from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS) last-minute?
Booking your ticket from MKE to CPS right before your trip is usually more expensive. But if you're flexible with your travel times and dates, you could bag a cheap last-minute fare.
Is it cheaper to book a MKE to CPS flight and hotel package?
Booking a MKE to CPS flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Select from our wide range of hotels and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from General Mitchell Intl. Airport (MKE) to St. Louis Downtown Airport (CPS)?
In most instances, you can reschedule or cancel your MKE to CPS flight. However, additional fees may apply, especially if you made your booking over 24 hours ago. Check your itinerary for the airline's fees and rules on flight changes, or if you need more information, go to our Customer Service portal.

Travel information

Origin airport
General Mitchell Intl.
Destination airport
St. Louis Downtown
Distance
324 mi

Book with confidence

Milwaukee to St. Louis Flights

The cheapest times to fly from Milwaukee to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Milwaukee to St. Louis are during the month of . You can find some of the cheapest flights from Milwaukee to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Milwaukee to St. Louis

Sunday is one of the best days to book for cheap flights from Milwaukee to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Milwaukee to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Milwaukee to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Milwaukee to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Milwaukee to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Milwaukee to St. Louis Flights

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*Available to One Key members.