STL - MKE

$80 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 9/27. 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

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
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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

Wed, Sep 24 - Wed, Oct 1
Delta Logo
6:00 am - 11:23 amSTL-MKE
5h 23m1 stop
Delta Logo
9:27 am - 1:20 pmMKE-STL
3h 53m1 stop
$237Delta
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Sat, Oct 4 - Tue, Oct 7
Southwest Logo
1:45 pm - 3:00 pmSTL-MKE
1h 15mnonstop
Southwest Logo
5:45 am - 7:05 amMKE-STL
1h 20mnonstop
$244Southwest
Find Deal
Sat, Oct 4 - Tue, Oct 7
United Airlines Logo
12:25 pm - 5:06 pmSTL-MKE
4h 41m1 stop
United Airlines Logo
12:05 pm - 3:44 pmMKE-STL
3h 39m1 stop
$247United Airlines
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Sat, Oct 4 - Tue, Oct 7
Southwest Logo
1:45 pm - 3:00 pmSTL-MKE
1h 15mnonstop
Southwest Logo
5:25 pm - 10:05 pmMKE-STL
4h 40m1 stop
$254Southwest
Find Deal
Fri, Sep 19 - Sat, Sep 20
United Airlines Logo
7:04 pm - 10:41 pmSTL-MKE
3h 37m1 stop
United Airlines Logo
3:44 pm - 7:27 pmMKE-STL
3h 43m1 stop
$267United Airlines
Find Deal
Thu, Sep 25 - Sun, Sep 28
American Airlines Logo
4:36 pm - 12:09 amSTL-MKE
7h 33m1 stop
American Airlines Logo
7:06 am - 11:57 amMKE-STL
4h 51m1 stop
$294American Airlines
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Fri, Nov 14 - Sun, Nov 16
American Airlines Logo
5:17 am - 11:20 amSTL-MKE
6h 03m1 stop
American Airlines Logo
5:00 am - 8:10 amMKE-STL
3h 10m1 stop
$304American Airlines
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Thu, Sep 11 - Mon, Sep 15
Frontier Logo
7:55 pm - 6:41 pmSTL-MKE
22h 46m1 stop
Frontier Logo
8:04 pm - 9:06 amMKE-STL
13h 02m1 stop
$330Frontier
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Sun, Aug 31 - Thu, Sep 4
Logo
2:02 pm - 11:06 pmSTL-MKE
9h 04m1 stop
Logo
12:53 pm - 1:02 pmMKE-STL
24h 09m1 stop
$584
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Wed, Sep 3 - Sun, Sep 7
Logo
7:54 pm - 8:55 pmSTL-MKE
25h 01m2 stops
Logo
9:50 pm - 8:44 pmMKE-STL
22h 54m1 stop
$608
Find Deal
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?

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, Tuesday is the cheapest day to fly on average and Saturday is the most expensive. Flying from Milwaukee back to St. Louis, the best deals are generally found on Tuesday, with Saturday 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 April, where tickets cost $256 (return) on average. On the other hand, the most expensive months are February and May, where the average cost of round-trip tickets is $585 and $452 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.

No, with an average price for the route of $208, prices are generally cheapest when you fly direct.

Find deals

Good to know

Low seasonJune
Cheapest flight$80
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly and prices are also 6% lower on average.
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 $80 for a one-way ticket and $237 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 737-800 Passenger/BBJ2 (winglets) is the aircraft model that flies most regularly on the St. Louis to Milwaukee flight 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.

  • 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 $273 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 airline flying 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 4242 reviews
7.5Entertainment
8.0Comfort
8.1Boarding
8.6Crew
7.0Food
Airline reviews

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

6.0 GoodCarl, Aug 2025MSY - BWI
Read more Southwest reviews

After being assaulted by a flight attendant I was then brushed off as oh well because he long braids didn’t mean to whip me in the eye. I have filed complaints and will see. But like any other issue I’ve had with kayak involved it’s been trash. Last time I’ll be using your app

AC sub par. WiFi not working correctly. Ac sucked. Seats very narrow.

Near 4 hour flight with only 1 service. Had to use call button to request water. Internet and power not working until into flight. Internet would stop working during flight.

Southwest's seats are the least comfortable I have ever sat in.

The cabin was quiet for the redeye flight. The area was clean. The staff was great. The 787 Max was in good condition. Drawbacks were that the seat widths were tight for some passengers. The seat padding was at best average and for a long flight uncomfortable.

Southwest like most American domestic airlines, is a mediocre airline. But it is among the cheapest. Oh well.

My flight was delayed 50 minutes and we were rushed to board to then sit for 15 minutes until the pilot arrived. Unacceptable since we could have waited to board. Also the delayed flight was updated AFTER we boarded to more than the 10 minutes as originally stated.

Other than a bit of a delay, everything was good. Again, the boarding process and picking seats is the only thing I don't enjoy.

If we are going to have to pay for luggage, make it easier to do. Put something on the app during check-in so I don't need to do it at the kiosk. I've done it twice recently and I ended up having to pay at the desk because something went wrong at the kiosk in Tampa.

southwest just starting charging for luggage. hadnt realized it until it was too late. now out $70 when i couldve bought a carry on if i wouldve known. free bags was one of the only reasons i chose southwest over another airline (the other being no assigned seats, which is apparently also being changed). stupid business decision. wont be flying southwest anymore.

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

Information on your arrival and departure airports

St. Louis (STL)
Milwaukee (MKE)

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