Cheap Flights from St. Louis (STL) to Lafayette (LAF)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University)

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Cheap Flights from St. Louis to Lafayette (STL-LAF)

Prices were available within the past 7 days and start at for one-way flights and $326 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Dec 25 - Thu, Jan 1
STL
St. Louis
LAF
Lafayette
$326 Roundtrip, found 6 days ago
$326
Roundtrip
found 6 days ago
Select United flight, departing Thu, Dec 25 from St. Louis to Lafayette, returning Thu, Jan 1, priced at $326 found 6 days ago
United
Thu, Dec 25 - Tue, Jan 6
STL
St. Louis
LAF
Lafayette
$336 Roundtrip, found 6 days ago
$336
Roundtrip
found 6 days ago
Select United flight, departing Thu, Dec 25 from St. Louis to Lafayette, returning Tue, Jan 6, priced at $336 found 6 days ago
United
Fri, Dec 26 - Thu, Jan 1
STL
St. Louis
LAF
Lafayette
$337 Roundtrip, found 6 days ago
$337
Roundtrip
found 6 days ago
Select United flight, departing Fri, Dec 26 from St. Louis to Lafayette, returning Thu, Jan 1, priced at $337 found 6 days ago
United
Tue, Dec 23 - Thu, Jan 1
STL
St. Louis
LAF
Lafayette
$363 Roundtrip, found 6 days ago
$363
Roundtrip
found 6 days ago
Select United flight, departing Tue, Dec 23 from St. Louis to Lafayette, returning Thu, Jan 1, priced at $363 found 6 days ago
United
Mon, Dec 22 - Thu, Jan 1
STL
St. Louis
LAF
Lafayette
$373 Roundtrip, found 6 days ago
$373
Roundtrip
found 6 days ago
Select United flight, departing Mon, Dec 22 from St. Louis to Lafayette, returning Thu, Jan 1, priced at $373 found 6 days ago
United
Mon, Dec 22 - Tue, Jan 6
STL
St. Louis
LAF
Lafayette
$383 Roundtrip, found 6 days ago
$383
Roundtrip
found 6 days ago
Select United flight, departing Mon, Dec 22 from St. Louis to Lafayette, returning Tue, Jan 6, priced at $383 found 6 days ago
United
Thu, Dec 25 - Sat, Jan 3
STL
St. Louis
LAF
Lafayette
$390 Roundtrip, found 6 days ago
$390
Roundtrip
found 6 days ago
Select United flight, departing Thu, Dec 25 from St. Louis to Lafayette, returning Sat, Jan 3, priced at $390 found 6 days ago
United
Sat, Dec 27 - Thu, Jan 1
STL
St. Louis
LAF
Lafayette
$400 Roundtrip, found 6 days ago
$400
Roundtrip
found 6 days ago
Select United flight, departing Sat, Dec 27 from St. Louis to Lafayette, returning Thu, Jan 1, priced at $400 found 6 days ago
United
Wed, Dec 24 - Sun, Jan 4
STL
St. Louis
LAF
Lafayette
$410 Roundtrip, found 6 days ago
$410
Roundtrip
found 6 days ago
Select United flight, departing Wed, Dec 24 from St. Louis to Lafayette, returning Sun, Jan 4, priced at $410 found 6 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University) cost?
Snag a cheap one-way flight or cheap return flight from $326 from Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University) 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 Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University)?
The cheapest month to fly from STL to LAF is December, when demand is low. Off-peak months are usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University)?
To find the cheapest airline that'll fly you from STL to LAF, use Expedia's filter tool. Customize your search based on what matters most to you, such as preferred carriers and cabin class. You can then sort your results by "Price (lowest to highest)" to see the cheapest fares upfront.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University) aren't available daily, so you'll need 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 STL to LAF?
You'll generally 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 Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University) 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 Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University) last-minute?
Holding off until right before your break to book a flight from STL to LAF generally means paying more. While it's possible to find some last-minute offers, they're not always guaranteed. Keep your travel schedule open to boost your chances of scoring a bargain.
Is it cheaper to book a STL to LAF flight and hotel package?
Compared with arranging flights and hotels separately, booking a STL to LAF flight and hotel package with Expedia could lead to significant savings. What's more, having it all in one place takes the hassle out of planning your trip. Simply pick your flights and choose from our wide range of stays, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Lafayette, IN (LAF-Purdue University)?
It's generally possible to cancel or reschedule your STL to LAF flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Purdue University
Roundtrip price
$326
Distance
216 mi

Book with confidence

St. Louis to Lafayette Flights

The cheapest times to fly from St. Louis to Lafayette

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

 

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

Sunday is one of the best days to book for cheap flights from St. Louis to Lafayette: 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 St. Louis to Lafayette

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 St. Louis to Lafayette 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 St. Louis to Lafayette 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 St. Louis to Lafayette 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.

 

St. Louis to Lafayette Flights

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*Available to One Key members.