$123 Cheap Flights from Kalamazoo (AZO) to St. Louis (STL)

View $123 flight on Thu, Sep 11, 2025Opens in a new window

Popular airlines from Kalamazoo, MI (AZO-Kalamazoo-Battle Creek Intl.) to St. Louis Lambert Intl. Airport (STL)

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Cheap Flights from Kalamazoo to St. Louis (AZO-STL)

Prices were available within the past 7 days and start at $123 for one-way flights and $216 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Sat, Aug 30 - Sun, Aug 31
AZO
Kalamazoo
STL
St. Louis
$216 Roundtrip, found 1 day ago
$216
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Kalamazoo to St. Louis, returning Sun, Aug 31, priced at $216 found 1 day ago
Delta
Sat, Aug 30 - Thu, Sep 4
AZO
Kalamazoo
STL
St. Louis
$231 Roundtrip, found 1 day ago
$231
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Kalamazoo to St. Louis, returning Thu, Sep 4, priced at $231 found 1 day ago
Delta
Mon, Aug 18 - Sat, Aug 30
AZO
Kalamazoo
STL
St. Louis
$237 Roundtrip, found 1 day ago
$237
Roundtrip
found 1 day ago
Select Delta flight, departing Mon, Aug 18 from Kalamazoo to St. Louis, returning Sat, Aug 30, priced at $237 found 1 day ago
Delta
Sat, Aug 30 - Sat, Sep 6
AZO
Kalamazoo
STL
St. Louis
$238 Roundtrip, found 1 day ago
$238
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Kalamazoo to St. Louis, returning Sat, Sep 6, priced at $238 found 1 day ago
American Airlines
Thu, Aug 14 - Mon, Aug 18
AZO
Kalamazoo
STL
St. Louis
$246 Roundtrip, found 6 days ago
$246
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Aug 14 from Kalamazoo to St. Louis, returning Mon, Aug 18, priced at $246 found 6 days ago
American Airlines
Thu, Aug 14 - Mon, Aug 18
AZO
Kalamazoo
STL
St. Louis
$249 Roundtrip, found 6 days ago
$249
Roundtrip
found 6 days ago
Select American Airlines flight, departing Thu, Aug 14 from Kalamazoo to St. Louis, returning Mon, Aug 18, priced at $249 found 6 days ago
Delta
Tue, Aug 26 - Mon, Sep 15
AZO
Kalamazoo
STL
St. Louis
$252 Roundtrip, found 1 day ago
$252
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Aug 26 from Kalamazoo to St. Louis, returning Mon, Sep 15, priced at $252 found 1 day ago
Delta
Thu, Sep 11 - Sat, Sep 13
AZO
Kalamazoo
STL
St. Louis
$253 Roundtrip, found 1 day ago
$253
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Sep 11 from Kalamazoo to St. Louis, returning Sat, Sep 13, priced at $253 found 1 day ago
American Airlines
Thu, Sep 11 - Sat, Sep 13
AZO
Kalamazoo
STL
St. Louis
$255 Roundtrip, found 1 day ago
$255
Roundtrip
found 1 day ago
Select American Airlines flight, departing Thu, Sep 11 from Kalamazoo to St. Louis, returning Sat, Sep 13, priced at $255 found 1 day ago
Delta
Sat, Aug 30 - Fri, Sep 5
AZO
Kalamazoo
STL
St. Louis
$256 Roundtrip, found 1 day ago
$256
Roundtrip
found 1 day ago
Select Delta flight, departing Sat, Aug 30 from Kalamazoo to St. Louis, returning Fri, Sep 5, priced at $256 found 1 day ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $342
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $342
Flights from Kalamazoo (AZO) to St. Louis (STL)
Origin airport
Kalamazoo-Battle Creek Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
American Airlines, Delta
Roundtrip price
$216
Distance
349 mi

Kalamazoo to St. Louis Flights

The cheapest times to fly from Kalamazoo to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Kalamazoo to St. Louis are during the month of August. You can find some of the cheapest flights from Kalamazoo to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Kalamazoo to St. Louis

Sunday is one of the best days to book for cheap flights from Kalamazoo to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Kalamazoo to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Kalamazoo to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $123 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Kalamazoo to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Kalamazoo to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Kalamazoo-Battle Creek Intl. Airport (AZO) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from AZO to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from AZO to STL?
The cheapest flights from AZO to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from AZO to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from AZO to STL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Kalamazoo-Battle Creek Intl. Airport (AZO) to Lambert-St. Louis Intl. Airport (STL)?
Direct flights from Kalamazoo-Battle Creek Intl. Airport (AZO) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel details and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from AZO to STL?
Usually you'll find the most flight options available on a Friday. Tuesdays are often the quietest.* But this can change based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Kalamazoo-Battle Creek Intl. Airport (AZO) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Kalamazoo-Battle Creek Intl. Airport (AZO) to Lambert-St. Louis Intl. Airport (STL) route, aim to travel before 3 PM. Later departures have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Kalamazoo-Battle Creek Intl. Airport (AZO) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from AZO to STL right before your trip is usually more expensive. But if there's some wiggle room with your itinerary, you could land a cheap last-minute fare.
Is it cheaper to book an AZO to STL flight and hotel package?
Compared with arranging hotels and flights separately, booking an AZO to STL flight and hotel package with Expedia could result in significant savings. Better yet, having everything in one place takes the hassle out of travel planning. Simply pick your flights and select from our extensive range of stays, then personalize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Kalamazoo-Battle Creek Intl. Airport (AZO) to Lambert-St. Louis Intl. Airport (STL)?
If you reserved your AZO to STL flight in the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of fare you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

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*Available to One Key members.