Cheap flights from St. Louis to Milwaukee from $79
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Milwaukee departing on 8/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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.Find the cheapest flights from St. Louis to Milwaukee
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Cheap direct flights
Spirit Airlines flights from St. Louis to Milwaukee
Our best Spirit Airlines deals on St. Louis to Milwaukee flight tickets
United Airlines flights from St. Louis to Milwaukee
Our best United Airlines deals on St. Louis to Milwaukee flight tickets
See travel insights to Milwaukee from
How to get the cheapest flight ticket from St. Louis to Milwaukee
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 Milwaukee?
The cheapest month to fly to Milwaukee from St. Louis is in April. Flight prices, which tend to average around $256, are often lower during this time because this is during the off-season. The month of December is another great option to travel to Milwaukee, with average flight prices from St. Louis averaging around $292.
What is the cheapest day to depart on your flight to Milwaukee?
According to our data, Tuesday is the cheapest day to fly to Milwaukee from St. Louis. The lowest ticket price found for a Tuesday departure recently was $290. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from St. Louis to Milwaukee on a Saturday will generally be more expensive and average around $432. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.
What is the cheapest time of day to depart on your flight to Milwaukee?
In the evening is the cheapest time of day to fly from St. Louis to Milwaukee when you can find flight prices for as low as $329. Flying to Milwaukee in the evening is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Milwaukee, so prices are often more expensive at around $489 per ticket.
What is the cheapest Lambert-St Louis to Milwaukee-Mitchell flight route?
Fly from Lambert-St Louis to Milwaukee-Mitchell for the best Lambert-St Louis - Milwaukee-Mitchell flight prices
What cabin class options are available on Lambert-St Louis to Milwaukee-Mitchell flights?
There are 1 cabin classes available to choose from on Lambert-St Louis to Milwaukee-Mitchell flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
How have St. Louis to Milwaukee flight prices changed over time?
As of June 2025, prices for St. Louis to Milwaukee flights are approximately 30% cheaper when compared to flights at the same time last year.
What is the cheapest airline that flies from Lambert-St Louis to Milwaukee-Mitchell?
Southwest, Spirit Airlines, and American Airlines are the most popular carriers operating from Lambert-St Louis to Milwaukee-Mitchell
What airlines fly to Milwaukee?
American Airlines, United Airlines and Southwest are the top three most popular airlines that fly to Milwaukee from St. Louis according to our data. American Airlines is the first choice among our users, with 50% of people opting to fly with this airline when traveling to Milwaukee. Keep in mind that there are 6 different airlines that fly to Milwaukee on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to Milwaukee on average per day?
The number of flights available between St. Louis and Milwaukee is 1 per day as of June 2025. The most frequent departure time is 10:00PM, with 44% of daily flights leaving at noon.
How many flights depart from St. Louis to Milwaukee on average per week?
10 flights are operational weekly from St. Louis to Milwaukee as of June 2025. The most popular departure day for this route is Mon, with 20% of flights per week taking off on this day.
When to book flights from St. Louis to Milwaukee
Cheap St. Louis to Milwaukee (STL to MKE) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Milwaukee
How far is Lambert-St Louis to Milwaukee-Mitchell by plane?
A flight from Lambert-St Louis to Milwaukee-Mitchell will travel around 327.2 mi. In terms of flight time, this usually takes a little over 1h 10m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Milwaukee-Mitchell Airport?
Prices for flights from Lambert-St Louis Airport to Milwaukee-Mitchell Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Milwaukee-Mitchell Airport?
The number of operators available for flights from Lambert-St Louis Airport to Milwaukee-Mitchell Airport is 3 as of June 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Milwaukee-Mitchell Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Milwaukee-Mitchell Airport.
What documentation or ID do you need to fly to Milwaukee-Mitchell Airport?
The travel and health documents you'll need for your trip to Milwaukee-Mitchell Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Milwaukee-Mitchell Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from St. Louis to Milwaukee?
Based on momondo bookings for flights between St. Louis and Milwaukee, the leading plane model is Boeing 737-700 Passenger/BBJ1 (winglets), making up 31.37% of the total bookings. Other popular models include Boeing 737 MAX 8 with 25.49%, Boeing 737-800 Passenger/BBJ2 (winglets) with 23.53%, and Boeing 737-800 with 3.92%.
What is the most popular airline from St. Louis to Milwaukee?
momondo data reveals that the most frequently booked airline on the route from St. Louis to Milwaukee is Southwest, representing 69% of all bookings. The subsequent popular airlines are American Airlines at 19% and Delta at 12%.
Best airlines flying from St. Louis to Milwaukee
Compare and see reviews for airlines that fly from St. Louis to Milwaukee with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $156 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $158 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $254 | Free Cancellation | Rating 8.0 4,287 reviews |
Southwest Flights From St. Louis to Milwaukee
Southwest is one of the most popular airlines flying from St. Louis to Milwaukee, operating 10 flights/week on average for this route. A good Southwest flight deal for St. Louis to Milwaukee starts from $254 round-trip, up to an average price of $331. Our users have rated Southwest at 8.0/10.
Traveling to a place near Milwaukee?
Book flights to Milwaukee if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from St. Louis to Milwaukee?
We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from St. Louis to Milwaukee for you.
Can I find flights from St. Louis to Milwaukee with flexible booking policies on momondo?
All flight searches from St. Louis to Milwaukee on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from St. Louis to Milwaukee?
momondo provides multiple filters to help you find the best flight to Milwaukee from St. Louis. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.
I’m not ready to book a flight from St. Louis to Milwaukee right now. Can momondo alert me if prices change?
Price alerts on flights to Milwaukee from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.