STL - MKE

$106 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 8/15. 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
$211
Typical prices: $410-$182
United Airlines
Sat 9/5Mon 9/7
STL - MKE • 1 stop
Cheapest non-stop
$279
Typical prices: $391-$361
Southwest
Tue 6/23Tue 6/30
STL - MKE • Non-stop
Top airlines
Cheapest • from $211 (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 11m
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 • 33% 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

Sat, Sep 5 - Mon, Sep 7
United Airlines Logo
5:30 pm - 9:00 pm
STL
-
MKE
3h 30m
1 stop
United Airlines Logo
6:15 am - 12:02 pm
MKE
-
STL
5h 47m
1 stop
$211United Airlines
Tue, Jun 23 - Tue, Jun 30
American Airlines Logo
1:42 pm - 7:58 pm
STL
-
MKE
6h 16m
1 stop
American Airlines Logo
6:17 pm - 11:44 pm
MKE
-
STL
5h 27m
1 stop
$217American Airlines
Fri, Jul 3 - Tue, Jul 7
American Airlines Logo
6:55 am - 12:44 pm
STL
-
MKE
5h 49m
1 stop
American Airlines Logo
5:02 am - 8:31 am
MKE
-
STL
3h 29m
1 stop
$258American Airlines
Tue, Jun 23 - Tue, Jun 30
Southwest Logo
8:30 am - 9:45 am
STL
-
MKE
1h 15mnonstop
Southwest Logo
8:05 am - 9:25 am
MKE
-
STL
1h 20mnonstop
$279Southwest
Mon, Aug 10 - Mon, Aug 17
American Airlines Logo
5:59 am - 10:57 am
STL
-
MKE
4h 58m
1 stop
American Airlines Logo
6:48 pm - 12:14 am
MKE
-
STL
5h 26m
1 stop
$281American Airlines
Tue, Jun 23 - Tue, Jun 30
Southwest Logo
5:55 pm - 10:00 pm
STL
-
MKE
4h 05m
1 stop
Southwest Logo
8:05 am - 9:25 am
MKE
-
STL
1h 20mnonstop
$289Southwest
Sat, Sep 5 - Mon, Sep 7
Southwest Logo
10:10 am - 11:20 am
STL
-
MKE
1h 10mnonstop
Southwest Logo
8:00 am - 9:15 am
MKE
-
STL
1h 15mnonstop
$290Southwest
Sat, Sep 5 - Mon, Sep 7
Southwest Logo
2:15 pm - 3:30 pm
STL
-
MKE
1h 15mnonstop
Southwest Logo
5:00 pm - 9:40 pm
MKE
-
STL
4h 40m
1 stop
$293Southwest
Sat, Jun 27 - Mon, Jun 29
Southwest Logo
10:15 am - 11:30 am
STL
-
MKE
1h 15mnonstop
Southwest Logo
5:15 pm - 10:50 pm
MKE
-
STL
5h 35m
1 stop
$302Southwest
Thu, Aug 6 - Sun, Aug 9
American Airlines Logo
6:25 pm - 11:57 pm
STL
-
MKE
5h 32m
1 stop
American Airlines Logo
4:25 pm - 11:54 pm
MKE
-
STL
7h 29m
1 stop
$303American Airlines
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 September.

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, Saturday 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 $265 (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 $381 on average.

Good to know

Low seasonAugust
Cheapest flight$106
Best time to beat the crowds with an average 6% drop in price.
Most popular time to fly and prices are also 2% 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 $106 for a one-way ticket and $211 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.

  • 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 $381 and an overall rating of 7.9, 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 $381 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 4264 reviews
7.0Food
8.6Crew
8.1Boarding
7.5Entertainment
8.0Comfort
Airline reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

4.0 OkayAnonymous, May 2026
MDW - LAX
Read more Southwest reviews

The first time I flew in the extra legroom section. It was difficult to notice a difference. I had bad luck with my neighbors. The crew was okay. Southwest has reduced the live TV options.

The flight was smooth. The Southwest experience has degraded overall, but this one was okay.

No gluten free snacks. Seats felt worn or bare bones even though it was a new 737 MAX 8.

One major problem that was very unprofessional and uncalled for. Plane landed and we had to wait 20 minutes to get off the plane since they were waiting for someone to come to the gate to drive the jetway. Southwest couldn't have someone available and waiting for the plane to land? Is there only one person in Hobby airport who knows to drive the jetway? Was he at lunch? In the bar? Uncomfortable and uncalled for!

The checking experience in Orlando was terrible, almost missed the flight. Too many travelers and Southwest completely understaffed.

I'm glad it wasn't only 75% full because I could get a good seat

if I was good. Not happy that I have to pay extra money to get the seat I need for lake room, but I guess that’s a sign of the times.

Seats were very comfortable. They tilted back. Drinks and snacks were free and served 3 times. Attendants were awesome.

Plane was clean and comfortable. Flight attendants and gate staff were professional, friendly and efficient. Boarding and deplaning were orderly and efficient. All in all, the typical excellent Southwest experience.

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

6 1/2 hours from Tampa to SFO on a Boeing 737. Cramped. No Service. No real food. One pass for coffee at the beginning and a second pass THREE hours later. And check-in in Tampa was nasty even by United standards. And I am at almost TWO million miles on United. It's a non-stop. But terrible service.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

We had a delay, but thankfully I made it to my connection. Overall it went smooth

The flight had a delay but I made it to my connection. Flight was smooth overall

As I wrote earlier, poor planning and/or communication. At least twice, we were told that we would be boarding in less than ten minutes, only to have the flight again delayed at least another hour.

This flight is a quick way to get to Chicago, but a bit expensive.

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

Movies on my phone are great. It would be nice to have a gluten free snack option.

It was what i expected. I like the movies you can access from your phone. It would be nice if there was a gluten free snack offered. But I did bring my own snack knowing there would not be a gluten free option

The flight was peaceful, just s slight turbulence, pilots and crews were all nice and made a great job! Arrived safely in the Philippines. Thank you ya’ll!

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

American Airlines II: Delay Boogaloo. Multiple gate changes, delays, boarded and then MORE delays. I hate to say this won’t matter, but posting stuff about major corporations in 2026 is a post-modern “scream into the void.” Was multiple hours late coming home, so there you go.

Awful, tons of delays, I got into Chicago multiple hours late meaning I hit the very traffic I tried so desperately to avoid. Just empty apologies from American Airlines text alerts. Trash behavior from a trash airline.

The flight attendants were very friendly, efficient, and helpful. The plane was ahead of schedule, and it all went very smoothly. Thank you.

They lost my baggage and I am still struggling to the information and update

We got delayed getting out of DFW for broken overhead bins. Once the flight got underway the captain kept the seatbelt sign lit the entire flight despite little perceptible turbulence, preventing use of the rest rooms and any sort of refreshment service in the main cabin.

Flight delays for communication overall not a good experience uncomfortable on the plane. Person in front of me reclined his seat, putting them inches from my lap.

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

Information on your arrival and departure airports

Compare transportation modes for St. Louis to Milwaukee

Transportation modeAverage priceAverage duration
Flights$3101h 10m
Buses$15814h 50m