$103 Find Cheap Flights from Milwaukee to St. Louis - Compare and Save

Among airlines operating Milwaukee to St. Louis flights:

• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only Southwest operates flights between Milwaukee and St. Louis.

Flights from Milwaukee to St. Louis usually depart from Milwaukee-Mitchell (MKE) and arrive at Lambert-St Louis (STL).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Two cabin classes are available on flights from Milwaukee to St. Louis:

• Economy Class
• First Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $223 round-trip via Dallas/Fort Worth (DFW), compared to $413 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$90 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737-800 Passenger/BBJ2 (winglets) family is used most often on this route, operated mainly by Southwest. Other aircraft seen on the route include Boeing 737 MAX 8 variants.

One-stop flights from Milwaukee to St. Louis most commonly connect through:

• Chicago O'Hare Intl (ORD) - 73% of one-stop connections
• Detroit Metropolitan Wayne County (DTW) - 13% of one-stop connections
• Nashville Intl (BNA) - 3% of one-stop connections
• Dallas/Fort Worth (DFW) - 3% of one-stop connections

Chicago O'Hare Intl (ORD) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 23% on the Milwaukee to St. Louis route. Wednesday is the cheapest departure day at $351 round-trip on average, while Sunday is the most expensive at $455, a difference of $104. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on Milwaukee to St. Louis flights, with 50% of flights leaving in that window. Afternoon departures account for 50%, evening flights for 0%, and night flights for 0%.

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

These are the earliest and latest flight times available from Milwaukee to St. Louis:

• Earliest: departs at 5:30 am and lands at 6:50 am
• Latest: departs at 6:35 pm and lands at 7:55 pm.

The flight takes about 1h 20m.

A nonstop flight from Milwaukee to St. Louis takes 1h 20m, covering 317 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $276 to $594. That means the highest observed fare was about 2x higher than the lowest one.

One-way fares from Milwaukee to St. Louis are currently lower than usual. Average one-way flight prices are about $132, which is 41% below the typical average for this route.

Flying via Chicago Midway (MDW) gives the shortest average 1-stop total travel time at 3h 09m, compared with 3h 42m via Nashville Intl (BNA) and 3h 43m via Chicago O'Hare Intl (ORD).

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Round-trip flights from Milwaukee to St. Louis range from $351 to $503, with an average of $402 over the past 12 months. Anything below $351 counts as a good deal.