MKE - STL

$99 Find Cheap Flights from Milwaukee to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Milwaukee to St. Louis departing on 5/20. 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 St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Milwaukee to St. Louis, 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 Milwaukee to St. Louis, 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
$196
Typical prices: $538-$236
Frontier
Sun 5/17Mon 5/18
MKE - STL • 1 stop
Cheapest non-stop
$213
Typical prices: $283-$206
Southwest
Sat 5/23Mon 5/25
MKE - STL • Non-stop
Top airlines
Cheapest • from $196 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
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Nonstop flights
You can fly direct with Southwest. Average duration is 1h 20m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Top layover airports
Cheapest • Avg $223 (round-trip)
Shortest trip • 3h 29m (one-way)
Insights
Insights
Insights
Insights
When to travel
Cheapest • 23% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
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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 St. Louis!
Flight Deals
Booking Insights
Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Milwaukee to St. Louis 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 Milwaukee to St. Louis

Sun, May 17 - Mon, May 18
Frontier Logo
9:56 am - 12:21 am
MKE
-
STL
14h 25m
1 stop
Frontier Logo
4:19 pm - 9:01 am
STL
-
MKE
16h 42m
1 stop
$196Frontier
Sat, May 23 - Mon, May 25
United Airlines Logo
7:15 pm - 10:50 pm
MKE
-
STL
3h 35m
1 stop
United Airlines Logo
7:22 am - 11:19 am
STL
-
MKE
3h 57m
1 stop
$211United Airlines
Sat, May 23 - Mon, May 25
Southwest Logo
6:30 am - 7:50 am
MKE
-
STL
1h 20mnonstop
Southwest Logo
8:35 am - 9:50 am
STL
-
MKE
1h 15mnonstop
$213Southwest
Tue, May 19 - Wed, May 20
Southwest Logo
2:45 pm - 9:05 pm
MKE
-
STL
6h 20m
1 stop
Southwest Logo
8:25 am - 9:40 am
STL
-
MKE
1h 15mnonstop
$215Southwest
Sat, May 23 - Mon, May 25
Southwest Logo
2:15 pm - 7:35 pm
MKE
-
STL
5h 20m
1 stop
Southwest Logo
8:35 am - 9:50 am
STL
-
MKE
1h 15mnonstop
$223Southwest
Tue, May 19 - Wed, May 20
Southwest Logo
6:25 am - 1:00 pm
MKE
-
STL
6h 35m
2 stops
Southwest Logo
1:25 pm - 5:15 pm
STL
-
MKE
3h 50m
1 stop
$230Southwest
Sat, Jun 6 - Mon, Jun 8
Southwest Logo
5:20 am - 1:10 pm
MKE
-
STL
7h 50m
1 stop
Southwest Logo
2:30 pm - 10:45 pm
STL
-
MKE
8h 15m
2 stops
$238Southwest
Tue, Jun 23 - Fri, Jun 26
Southwest Logo
8:05 am - 9:25 am
MKE
-
STL
1h 20mnonstop
Southwest Logo
7:15 pm - 12:15 am
STL
-
MKE
5h 00m
1 stop
$252Southwest
Tue, Aug 25 - Sat, Aug 29
American Airlines Logo
2:46 pm - 10:40 pm
MKE
-
STL
7h 54m
1 stop
American Airlines Logo
5:11 pm - 10:57 pm
STL
-
MKE
5h 46m
1 stop
$254American Airlines
Tue, Jun 23 - Fri, Jun 26
Southwest Logo
5:05 pm - 6:25 pm
MKE
-
STL
1h 20mnonstop
Southwest Logo
4:35 pm - 11:55 pm
STL
-
MKE
7h 20m
2 stops
$257Southwest
Booking Insights

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

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

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

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

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

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

When flying from Milwaukee to St. Louis, you should consider leaving on a Wednesday and avoid Sundays if you are looking for the best rates. For your return to Milwaukee, you’ll find the best rates on Tuesdays and the most expensive ones on Mondays.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Milwaukee to St. Louis, 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 Milwaukee to St. Louis is August, where tickets cost $286 (return) on average. On the other hand, the most expensive months are December and February, where the average cost of round-trip tickets is $530 and $507 respectively.

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

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 $325, prices are generally cheapest when you fly direct.

Good to know

Low seasonDecember
Cheapest flight$99
Best time to beat the crowds but there is an average 42% increase in price.
Most popular time to fly with an average 3% increase in price.
Flight from Milwaukee to St. Louis

When to book flights from Milwaukee to St. Louis

Are your dates flexible? Find out the best times to travel from Milwaukee to St. Louis 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 Milwaukee to St. Louis

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

    In the last 3 days, the lowest price for a flight from Milwaukee to St. Louis was $99 for a one-way ticket and $196 for a round-trip.

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

    No

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

    On your way to St. Louis, you’ll fly out from Milwaukee-Mitchell. You’ll be landing at Lambert-St Louis.

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

    Delta, American Airlines, JetBlue, and Alaska Airlines offer inflight Wi-Fi service on the Milwaukee to St. Louis flight route.

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

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

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

    Star Alliance is the only airline alliance operating flights between Milwaukee and St. Louis.

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

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

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

    The two airlines most popular with KAYAK users for flights from Milwaukee to St. Louis are Southwest and United Airlines. With an average price for the route of $375 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 $320 and an overall rating of 7.4.

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

    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 Milwaukee to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Milwaukee 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 Milwaukee to St. Louis?

    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 St. Louis with an airline and back to Milwaukee with another airline. Booking your flights between Milwaukee and STL 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 Milwaukee to St. Louis?

    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 St. Louis from Milwaukee 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 Milwaukee to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $193 or less one-way and $366 or less round-trip.

Prefer to fly direct from Milwaukee to St. Louis?

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

Direct departures

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

Direct returns

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

Reviews of the top airlines flying from Milwaukee to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Milwaukee to St. Louis. 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 Milwaukee to St. Louis? 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 4314 reviews
8.1Boarding
7.0Food
7.5Entertainment
8.0Comfort
8.6Crew
Airline reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

10.0 Excellentlarry, Apr 2026
LGB - PHX
Read more Southwest reviews

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

Southwest is kind of a slum airline. It’s gotten more expensive over the years for less and less service. I am a Southwest Chase Visa card holder and was forced to choose a seat in the 26th row in the middle seat. However my wife who is a rewards member but doesn’t hold a card or anything else, gets randomly assigned a normally paid seat in row 6! How does that work?

For the first time in a long time, the Wi-Fi actually worked the entire flight! The flight crew was amazing as usual.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Outstanding service, efficient & friendly crew, flight was safe, comfortable & on time

Delayed - weather wasn't bad at either end. Also sat on tarmac in ORD.

They told us yesterday APR21st that they were cleaning the plane and we got delayed. After that they said they didn't had any crew for the flight so they cancelled the flight till next day.

The crew was great. Very friendly and responsive. The plane was old, small and tight. We ran out of overhead space and I had to check. Middle seat was particularly tight.

The flight crew on this leg of my trip was very friendly and pleasant. Every one of them was humorous, as well as helpful and accommodating. This group was BY FAR the best crew I’ve flown with. They deserve kudos.

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

Information on your arrival and departure airports

Compare transportation modes for Milwaukee to St. Louis

Transportation modeAverage priceAverage duration
Flights$3341h 20m
Buses$22010h 30m