Cheap Flights from Waukesha (UES) to St. Louis (STL)

Popular airlines from Waukesha, WI (UES-Waukesha County) to St. Louis Lambert Intl. Airport (STL)

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Frequently asked questions

How much does a flight from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL) cost?
Grab a cheap one-way flight or cheap return flight from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL)?
is the most affordable month to fly from UES to STL. Traveling during an off-peak travel window is often the key to landing a great deal.
Which airlines fly direct from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL)?
You can't take a direct flight from Waukesha, WI (UES-Waukesha County) to Lambert-St. Louis Intl. Airport (STL). However, you can arrive in St. Louis without any layovers by taking off from General Mitchell Intl. Airport (MKE).
What is the cheapest airline that flies from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from UES to STL, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filter tool. Enter your travel details and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from UES to STL?
You'll usually find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL) route, aim to travel before 3 PM. Departures after this hour are 22% more likely to be canceled.**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 Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your ticket from UES to STL right before your trip is generally more expensive. However, if there's some wiggle room with your travel times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a UES to STL flight and hotel package?
Securing a UES to STL flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Pick from our impressive range of hotels and then add flights, car rentals and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Waukesha County Airport (UES) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you can cancel or modify your UES to STL flight. However, there may be additional fees, especially if you booked more than 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you'd like further details, go to our Customer Service portal.

Travel information

Origin airport
Waukesha County
Destination airport
Lambert-St. Louis Intl.
Distance
316 mi

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Waukesha to St. Louis Flights

The cheapest times to fly from Waukesha 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 Waukesha to St. Louis are during the month of . You can find some of the cheapest flights from Waukesha to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Waukesha 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 Waukesha 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 Waukesha to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from 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 Waukesha 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 Waukesha 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.

 

Waukesha to St. Louis Flights

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