STL - MKE

$90 Find Cheap Flights from St. Louis to Milwaukee

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Milwaukee departing on 5/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Milwaukee

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Milwaukee, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Milwaukee, as well as popular online travel agencies
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$202
Typical prices: $354-$212
Delta
Tue 4/21Tue 4/28
STL - MKE • 1 stop
Cheapest non-stop
$213
Typical prices: $489-$393
Southwest
Mon 5/11Mon 5/18
STL - MKE • Non-stop
Top airlines
Cheapest • from $202 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with Southwest. Average duration is 1h 15m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $286 (round-trip)
Shortest trip • 3h 42m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 34% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Milwaukee!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Milwaukee that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Milwaukee

Tue, Apr 21 - Tue, Apr 28
Delta Logo
12:23 pm - 4:34 pm
STL
-
MKE
4h 11m
1 stop
Delta Logo
10:53 am - 4:50 pm
MKE
-
STL
5h 57m
1 stop
$202Delta
Tue, Apr 14 - Tue, Apr 21
American Airlines Logo
7:05 am - 10:43 am
STL
-
MKE
3h 38m
1 stop
American Airlines Logo
6:40 pm - 10:19 pm
MKE
-
STL
3h 39m
1 stop
$205American Airlines
Mon, May 11 - Mon, May 18
Southwest Logo
8:35 am - 9:50 am
STL
-
MKE
1h 15mnonstop
Southwest Logo
5:20 pm - 6:40 pm
MKE
-
STL
1h 20mnonstop
$213Southwest
Wed, Apr 8 - Sun, Apr 12
Frontier Logo
4:59 pm - 6:17 pm
STL
-
MKE
25h 18m
1 stop
Frontier Logo
7:02 pm - 7:51 am
MKE
-
STL
12h 49m
1 stop
$217Frontier
Tue, Apr 21 - Tue, Apr 28
Southwest Logo
8:25 am - 4:05 pm
STL
-
MKE
7h 40m
1 stop
Southwest Logo
6:25 am - 1:00 pm
MKE
-
STL
6h 35m
2 stops
$218Southwest
Tue, Apr 21 - Tue, Apr 28
Southwest Logo
1:25 pm - 5:15 pm
STL
-
MKE
3h 50m
1 stop
Southwest Logo
8:00 am - 9:20 am
MKE
-
STL
1h 20mnonstop
$219Southwest
Tue, Apr 21 - Thu, Apr 30
Delta Logo
6:48 am - 1:14 pm
STL
-
MKE
6h 26m
1 stop
Delta Logo
5:48 pm - 11:13 pm
MKE
-
STL
5h 25m
1 stop
$222Delta
Tue, Apr 21 - Tue, Apr 28
Southwest Logo
2:30 pm - 9:45 pm
STL
-
MKE
7h 15m
2 stops
Southwest Logo
5:50 am - 3:15 pm
MKE
-
STL
9h 25m
2 stops
$223Southwest
Mon, May 11 - Mon, May 18
Southwest Logo
1:45 pm - 11:25 pm
STL
-
MKE
9h 40m
2 stops
Southwest Logo
5:20 pm - 6:40 pm
MKE
-
STL
1h 20mnonstop
$228Southwest
Tue, Apr 21 - Tue, Apr 28
Southwest Logo
9:00 pm - 10:15 pm
STL
-
MKE
1h 15mnonstop
Southwest Logo
4:40 pm - 6:00 pm
MKE
-
STL
1h 20mnonstop
$235Southwest
Booking Insights

KAYAK's insights & trends for St. Louis to Milwaukee flights

Get data-powered insights and trends into flights from St. Louis to Milwaukee to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Milwaukee?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Milwaukee departing in April.

What’s the cheapest day of the week to fly from St. Louis to Milwaukee?

The average price of all round-trip flights from St. Louis to Milwaukee clicked on KAYAK for each day over the last 12 months.

For St. Louis to Milwaukee, Wednesday is the cheapest day to fly on average and Monday is the most expensive. Flying from Milwaukee back to St. Louis, the best deals are generally found on Wednesday, with Sunday being the most expensive.

What is the cheapest month to fly from St. Louis to Milwaukee?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Milwaukee, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Milwaukee is October, where tickets cost $263 (return) on average. On the other hand, the most expensive months are January and February, where the average cost of round-trip tickets is $649 and $499 respectively.

Can I save money by flying with a layover from St. Louis to Milwaukee?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $360 on average.

Good to know

Low seasonAugust
Cheapest flight$90
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly with an average 7% increase in price.
Flight from St. Louis to Milwaukee

When to book flights from St. Louis to Milwaukee

Are your dates flexible? Find out the best times to travel from St. Louis to Milwaukee based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Milwaukee

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

    In the last 3 days, the lowest price for a flight from St. Louis to Milwaukee was $90 for a one-way ticket and $202 for a round-trip.

  • Do I need a passport to fly between St. Louis and Milwaukee?

    No, a passport isn't needed to fly from St. Louis to Milwaukee. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from St. Louis to Milwaukee?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Milwaukee, also known as Milwaukee-Mitchell.

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to Milwaukee?

    Only American Airlines offers inflight Wi-Fi service on the St. Louis to Milwaukee flight route.

  • Which aircraft models fly most regularly from St. Louis to Milwaukee?

    The Boeing 737 MAX 8 is the aircraft model that flies most regularly on the St. Louis to Milwaukee flight route.

  • Which airline alliances offer flights from St. Louis to Milwaukee?

    oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Milwaukee, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from St. Louis to Milwaukee?

    There are nonstop flights from St. Louis to Milwaukee on a daily basis.

  • Which is the best airline for flights from St. Louis to Milwaukee, Southwest or United Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Milwaukee are Southwest and United Airlines. With an average price for the route of $389 and an overall rating of 8.0, Southwest is the most popular choice. United Airlines is also a great choice for the route, with an average price of $336 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from St. Louis to Milwaukee?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Milwaukee.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Milwaukee?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Milwaukee from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Milwaukee?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Milwaukee with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and MKE can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Milwaukee?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Milwaukee from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from St. Louis to Milwaukee

  • Looking for a cheap flight? 25% of our users found flights on this route for $185 or less one-way and $344 or less round-trip.

Prefer to fly direct from St. Louis to Milwaukee?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Lambert-St Louis to Milwaukee-Mitchell.
Find which airlines fly direct from Lambert-St Louis Airport to Milwaukee-Mitchell Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to Milwaukee-Mitchell

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Milwaukee-Mitchell to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Reviews of the top 3 airlines serving from St. Louis to Milwaukee

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Milwaukee. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Milwaukee? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4333 reviews
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
8.0Comfort
Airline reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

2.0 MediocreStuart, Mar 2026
HOU - STL
Read more Southwest reviews

I have roller bag with food and medication told me I couldn't bring on my 2nd flight today. 15 years flying with SW never an issue with that bag.

Southwest continues to do less for more money. Flight attendants used to be fun and friendly. But now it’s like they don’t even see you. Such a shame.

Great flight. Good snacks and drinks. Grateful it was free. The flight from Nashville to louisville, i think her name was Tracy (not sure that's right) super awesome, nice and cheerful. She really enjoyed being at work today! She was the person who scanned the boarding pass on flight wn941. She should be recommended for a raise !

I liked it better when you were truer to your roots Am paying more for less fun

Southwest was greaat! The most expensive but the least upsetting for those we were flying to see.

I flew twice this week on Southwest, was delayed over 2 hours both ways. From Pittsburgh to Chicago it was due to weather but the gate agents, pilot etc were great at updating everyone. Today from Midway to Pittsburgh the plane had come from an international location, kept getting delayed, no information was given until we were delayed for the third time. It was ridiculous, whoever scheduled that plane to fly to Pittsburgh after didn’t consider a lot of things.

Boarding was easy. The seats are small and fairly uncomfortable

I was supposed to be on a later flight. When I showed up at the gate, the woman working there was extremely helpful getting moved up to this earlier flight.

We had a 5 hour delay on the tarmac in Baltimore

Long layover between flights to Long Island from BWI - need better coordination between flights

They promise free wi-fi prior to boarding and then once on board you are informed you have to purchase wifi even after being a mileagePlus member.

I've been flying American mostly, and it's been very frustrating. This united flight makes me realize maybe the issue isn't flying, but the airline. United was a significantly better experience. The plane was more comfortable, with a normal amount of leg room (vs the ridiculous reductions AA has made), more comfortable seats, screens to watch movies. It was a much better experience!

Awful. No counter attendants. No dinner offered due to delays.

Horrible service no Wi-Fi connection on both leg of the flight and they are refusing to fix bad service

3 hour delay…. Nearly 2 hours sitting on tarmac. Do better, United. Or at least have the sense to not say “we hope you enjoyed your flight with us” upon disembarking.

Flights were on time. Free Wifi on plane. Everything was well organized.

During landing. 2 crew members passed 3 times by my lane and didn't notice that people in front of us had their site to the furthermore reclined... That was uncomfortable and could have been dangerous.

They delayed the flight from 9:00 to 11:55 At 11:45 they canceled the flight. I paid a premium price for the tickets with poor service

We had excellent customer service despite the chaos at George Bush airport in Houston!

It isvvery small flight. No leg room . No space to put my personal item at feet.

The flight changed gates multiple times and flight had to be delayed multiple times

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

I was in last row so that is never great bc the person in front of me leaned his seat all the way back into me.

Delayed for mechanical and no updates on what was happening and how long the delay might be.

My flight from LGA was cancelled and my rebooked flight from JFK was delayed numerous times. I will now be getting home after 2am.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

On the return flight, arriving in Denver we sat on the tarmac in Denver for over 20 minutes.

Typical AA - late by 90+ mn. Gate changed twice... Changed the departure time 6 times No explanation, no communication on reasons for delay I travel with AA twice a year... and it is consistently very poor.. I will continue to use AA only when i have to.

The flight attendant in business class was excellent! Professional, friendly and attentive.

Delays with no explanation. It could have been handled better.

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

Information on your arrival and departure airports