$77 Cheap Flights from Milwaukee (MKE) to St. Louis (STL)

View $77 flight on Mon, Sep 22, 2025Opens in a new window

Popular airlines from General Mitchell Intl. Airport (MKE) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Milwaukee to St. Louis (MKE-STL)

Prices were available within the past 7 days and start at $77 for one-way flights and $145 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Mon, Sep 22 - Thu, Sep 25
MKE
Milwaukee
STL
St. Louis
$145 Roundtrip, found 5 days ago
$145
Roundtrip
found 5 days ago
Select Southwest Airlines flight, departing Mon, Sep 22 from Milwaukee to St. Louis, returning Thu, Sep 25, priced at $145 found 5 days ago
Southwest Airlines
Sat, Sep 20 - Thu, Sep 25
MKE
Milwaukee
STL
St. Louis
$153 Roundtrip, found 3 days ago
$153
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Sat, Sep 20 from Milwaukee to St. Louis, returning Thu, Sep 25, priced at $153 found 3 days ago
United
Wed, Dec 17 - Tue, Dec 23
MKE
Milwaukee
STL
St. Louis
$157 Roundtrip, found 20 hours ago
$157
Roundtrip
found 20 hours ago
Select United flight, departing Wed, Dec 17 from Milwaukee to St. Louis, returning Tue, Dec 23, priced at $157 found 20 hours ago
American Airlines
Wed, Aug 13 - Sat, Aug 16
MKE
Milwaukee
STL
St. Louis
$159 Roundtrip, just found
$159
Roundtrip
just found
Select American Airlines flight, departing Wed, Aug 13 from Milwaukee to St. Louis, returning Sat, Aug 16, priced at $159 just found
American Airlines
Sat, Aug 16 - Mon, Aug 18
MKE
Milwaukee
STL
St. Louis
$159 Roundtrip, found 22 hours ago
$159
Roundtrip
found 22 hours ago
Select American Airlines flight, departing Sat, Aug 16 from Milwaukee to St. Louis, returning Mon, Aug 18, priced at $159 found 22 hours ago
American Airlines
Tue, Aug 12 - Sat, Aug 16
MKE
Milwaukee
STL
St. Louis
$160 Roundtrip, found 3 days ago
$160
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Aug 12 from Milwaukee to St. Louis, returning Sat, Aug 16, priced at $160 found 3 days ago
Southwest Airlines
Sat, Sep 20 - Sat, Sep 27
MKE
Milwaukee
STL
St. Louis
$163 Roundtrip, found 3 days ago
$163
Roundtrip
found 3 days ago
Select Southwest Airlines flight, departing Sat, Sep 20 from Milwaukee to St. Louis, returning Sat, Sep 27, priced at $163 found 3 days ago
American Airlines
Fri, Aug 22 - Tue, Aug 26
MKE
Milwaukee
STL
St. Louis
$165 Roundtrip, found 13 hours ago
$165
Roundtrip
found 13 hours ago
Select American Airlines flight, departing Fri, Aug 22 from Milwaukee to St. Louis, returning Tue, Aug 26, priced at $165 found 13 hours ago
United
Fri, Oct 3 - Sat, Oct 4
MKE
Milwaukee
STL
St. Louis
$165 Roundtrip, found 2 days ago
$165
Roundtrip
found 2 days ago
Select United flight, departing Fri, Oct 3 from Milwaukee to St. Louis, returning Sat, Oct 4, priced at $165 found 2 days ago
Delta
Wed, Dec 17 - Tue, Dec 23
MKE
Milwaukee
STL
St. Louis
$173 Roundtrip, found 20 hours ago
$173
Roundtrip
found 20 hours ago
Select Delta flight, departing Wed, Dec 17 from Milwaukee to St. Louis, returning Tue, Dec 23, priced at $173 found 20 hours ago

Find the cheapest month to fly from Milwaukee (MKE) to St. Louis (STL)

August is typically the cheapest month to fly

From $141 - $583 per traveler.

Graph displaying average flight prices per month

Flights from Milwaukee (MKE) to St. Louis (STL)
Origin airport
General Mitchell Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta, Southwest Airlines, United
Roundtrip price
$145
Distance
317 mi
Average flight time
1 hour 16 mins

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 September. 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 $77 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.

 

Frequently asked questions

How much does a flight from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL) cost?
You can pick up cheap return flights starting from $137 from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Southwest Airlines flight leaving MKE on August 4 2025 and touching down at STL. The price was last updated on July 10 2025 and has not changed since.
What is the cheapest month to fly from MKE to STL?
To pick up a cheap fare, search for nonstop flights from MKE to STL taking off in September. You can find a one-way Southwest Airlines flight for $69 leaving on September 1 2025. This price is based on the cheapest direct flight found on Expedia for this route in the next 330 days. The price was last updated on July 10 2025 and remains unchanged.
Which airlines fly direct from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL)?
If you're departing from General Mitchell Intl. Airport (MKE), you can take a nonstop flight to Lambert-St. Louis Intl. Airport (STL) with Southwest Airlines.
What is the cheapest airline that flies from MKE to STL?
Journey from MKE to STL with Southwest Airlines. This carrier currently has the cheapest one-way fare on this route, starting from $69. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from MKE on September 1 2025. Prices were last updated on July 10 2025 and have not changed since.
How many flights per day from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL)?
On average, there's only 1 direct flight departing from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL) per day. If this doesn't suit your schedule, check out flights with a layover. Just customize your search on Expedia to include one stop or more to discover the next best option.
What are the most popular departure times for flights from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL)?
The 6 AM departures from MKE to STL see the highest demand. They can also be more expensive. If you want to save on your fare, choose a less crowded time to fly.
What day of the week has the most flights from MKE to STL?
Jet off on a Friday if you're searching for the largest selection of flights from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL).
What is the earliest flight from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL)?
Hop on the earliest flight at around 6:00AM UTC-6, departing from General Mitchell Intl. Airport (MKE). You'll be flying for approximately 1h 35m, touching down at Lambert-St. Louis Intl. Airport (STL) at approximately 7:35AM UTC-6.
How long does it take to fly from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL)?
It takes about 1 hour and 26 minutes to fly the 320 mi from MKE to STL.
What airline has the least delays from MKE to STL?
United Airlines has the strongest track record for on-time direct flights from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL), with an on-time rating of 100%. Use the Expedia App to view your journey status before you jet off and get immediate updates about any changes.
What is the best time to fly from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL)?
Opt for a flight from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this time are on average 22% more likely to be canceled.**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 St. Louis from General Mitchell Intl. Airport (MKE)?
If you're on a direct flight from General Mitchell Intl. Airport (MKE) to St. Louis, Lambert-St. Louis Intl. Airport (STL) is the only airport you can touch down at.
Is it cheaper to buy a plane ticket from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute fares from MKE to STL are typically more expensive. To secure the lowest rates, start searching for flights well in advance. That being said, if you're flexible with your travel plans, it's possible to score a cheap fare right before your journey.
Is it cheaper to book a MKE to STL flight and hotel package?
You can save money by booking a MKE to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've chosen your ideal accommodations and flights, you can add extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from General Mitchell Intl. Airport (MKE) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you can reschedule or cancel your MKE to STL flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you need more information, go to our Customer Service portal.

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