STL - MKE

$74 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 1/26. 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
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$138
Typical prices: $404-$581
Frontier
Tue 2/24Tue 3/3
STL - MKE • 1 stop
Cheapest non-stop
$287
Typical prices: $428-$596
Southwest
Tue 2/24Tue 3/3
STL - MKE • Non-stop
When to travel
April
Cheapest • 31% price drop
May
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, Feb 24 - Tue, Mar 3
Frontier Logo
3:49 pm - 3:44 pm
STL
-
MKE
23h 55m1 stop
Frontier Logo
4:39 pm - 10:27 pm
MKE
-
STL
29h 48m1 stop
$138Frontier
Fri, Jan 30 - Mon, Feb 2
Frontier Logo
5:42 pm - 10:17 am
STL
-
MKE
16h 35m1 stop
Frontier Logo
7:01 pm - 11:33 pm
MKE
-
STL
28h 32m1 stop
$152Frontier
Tue, Feb 10 - Tue, Feb 17
American Airlines Logo
3:54 pm - 11:23 pm
STL
-
MKE
7h 29m1 stop
American Airlines Logo
8:00 am - 1:16 pm
MKE
-
STL
5h 16m1 stop
$173American Airlines
Mon, Jan 19 - Wed, Jan 21
United Airlines Logo
6:40 pm - 10:56 pm
STL
-
MKE
4h 16m1 stop
United Airlines Logo
7:00 am - 12:29 pm
MKE
-
STL
5h 29m1 stop
$182United Airlines
Fri, Jan 30 - Mon, Feb 2
Frontier Logo
5:42 pm - 10:17 am
STL
-
MKE
16h 35m1 stop
Frontier Logo
7:01 pm - 6:51 am
MKE
-
STL
35h 50m2 stops
$196Frontier
Wed, Feb 25 - Sat, Feb 28
United Airlines Logo
6:55 pm - 10:28 pm
STL
-
MKE
3h 33m1 stop
United Airlines Logo
5:00 am - 10:36 am
MKE
-
STL
5h 36m1 stop
$242United Airlines
Sat, Jan 24 - Sun, Jan 25
American Airlines Logo
11:55 am - 5:05 pm
STL
-
MKE
5h 10m1 stop
American Airlines Logo
6:58 pm - 10:20 am
MKE
-
STL
15h 22m1 stop
$265American Airlines
Sun, Jan 18 - Mon, Jan 19
Frontier Logo
10:06 am - 6:47 pm
STL
-
MKE
8h 41m1 stop
Frontier Logo
7:37 pm - 11:33 pm
MKE
-
STL
27h 56m1 stop
$272Frontier
Tue, Feb 24 - Tue, Mar 3
Southwest Logo
7:55 pm - 9:10 pm
STL
-
MKE
1h 15mnonstop
Southwest Logo
5:30 am - 7:05 am
MKE
-
STL
1h 35mnonstop
$287Southwest
Tue, Feb 24 - Tue, Mar 3
Southwest Logo
10:15 am - 11:30 am
STL
-
MKE
1h 15mnonstop
Southwest Logo
5:10 am - 12:20 pm
MKE
-
STL
7h 10m1 stop
$297Southwest
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 February.

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, Monday is the cheapest day to fly on average and Sunday is the most expensive. Flying from Milwaukee back to St. Louis, the best deals are generally found on Tuesday, 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 April, where tickets cost $260 (return) on average. On the other hand, the most expensive months are February and May, where the average cost of round-trip tickets is $604 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.

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 $361 on average.

Good to know

Low seasonJune
Cheapest flight$74
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 19% 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 $74 for a one-way ticket and $138 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 is the only airline alliance operating flights between St. Louis and Milwaukee.

  • 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 American Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Milwaukee are Southwest and American Airlines. With an average price for the route of $372 and an overall rating of 8.0, Southwest is the most popular choice. American Airlines is also a great choice for the route, with an average price of $394 and an overall rating of 7.2.

  • 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 $405 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 airlines 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 4252 reviews
8.0Comfort
8.6Crew
7.5Entertainment
8.1Boarding
7.0Food
Airline reviews

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

2.0 MediocreMatthew, Dec 2025
DCA - OKC
Read more Southwest reviews

Haven’t flown on SW in years. Flight was on time departing and arriving. Served vegan butter onion flavored pretzels which were bad. Coke served was in a tiny paper cup. Crew was not engaging. Felt like they were going through the motions. Old plane, tight seats and no leg room.

Check-in, Boarding and flight were smooth. All the employees and crew was very nice and funny. They gave the kids crayons and workbooks to keep them occupied which was a big win. I’ve flown Southwest many times and that’s the first time I’ve seen that and it is a great addition.

Flight was on time. Wi-fi was a little spotty/slow. Boarding and exit were efficient.

Okay, not wonderful. Short flight. Wi-fi didn't work properly. Stuck waiting for a gate to open upon arrival for 20 or so minutes.

They sent a notice that they were boarding an hour early. We had to leave the club and run to the gate. They said sorry, that came from corporate and was a mistake. They did not have enough seating because the flight before it had not taken off on time. They moved our gate and delayed it for an hour.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

The lead steward kept singing about "San Francisco" and hotel California---more annoying than humorous....needs work. Flight was smooth and on time.

Still a fan of open seating. Flight was on schedule and arrived on time. The 737 MAX is very comfortable.

Airline travel is always too cramped to really be pleasant, but the cabin crew on this flight did a pretty good job of making up for it by putting on some music during boarding and sprinkling a few funny remarks into the safety briefing and announcements, and just generally being friendly and helpful. It definitely reminded me of why I prefer the in-flight experience on Southwest!

No delays and arrived to destination 30 min early. Staff was super friendly.

We were 4+ hours delayed. AA is absolutely obnoxious. They just kept pushing back the time to the point where we did not get into Vegas until after midnight when we were supposed to arrive like 845pm.

My last flight on 25 Dec, it’s Christmas Day, everyone happy and very good mood. I really enjoy traveling with Americans Airlines from Miami to Minneapolis my home town after long flight from lhe to Doha then Miami. Thank you again to make my travels comfortable and relaxed. Best regards

The boarding process needs to be fixed. The zone don't work, especially when there is hardly anyone in zones 3, 4,and 5, leaving the majority of the passengers backed up in the aisle, especially because passengers seated near the front are blocking passengers who are seated in the rear of the plane. It would also help if the size of carry on bags was more strictly enforced.

WiFi didn’t work the entire flight. Very disappointing. Minimal food and options - sadly the state of current affairs. All other aspects of the flight were fine.

Great flight - friendly and attentive team! Seats in coach were comfy, but a little cramped - but that is the case with all airlines ;)

The boarding by groups is pointless. The first two groups worked fine, but almost Noone boarded in goups three thru five leaving the vast majority boarding when group six was called. It defeated the purpose of spreading out the crowd.

For whatever reason, the flight was not catered -we were told it would be a 45 minute delay waiting for catering - so no food. There were opened candy and peanuts in the seatback pocket. Flight landed early in DFW but due to the assigned gate not being available, we sat on the ground for 30 minutes waiting for the gate to open - making the flight actually arrive at the gate late.

The pilot greased the landing and the crew was fantastic.

I bought wifi and most of the flight could not even use it my apps would just spin. I couldn't even listen to music. super frustrating.

delayed due to weather. Could not communicate with family since the wifi was broken

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

Information on your arrival and departure airports