$180 Cheap Flights from St. Louis (STL) to Kitchener (YKF)

View $180 flight on Fri, Jan 9, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Kitchener, ON (YKF-Region of Waterloo Intl.)

Cheap Flights from St. Louis to Kitchener (STL-YKF)

Prices were available within the past 7 days and start at $180 for one-way flights and $408 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Fri, Jan 16 - Sun, Jan 18
STL
St. Louis
YKF
Kitchener
$408 Roundtrip, found 3 hours ago
$408
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Fri, Jan 16 from St. Louis to Kitchener, returning Sun, Jan 18, priced at $408 found 3 hours ago
Air Canada
Mon, Jan 19 - Sat, Jan 24
STL
St. Louis
YKF
Kitchener
$466 Roundtrip, found 1 day ago
$466
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Jan 19 from St. Louis to Kitchener, returning Sat, Jan 24, priced at $466 found 1 day ago
Air Canada
Fri, Jan 16 - Sun, Jan 18
STL
St. Louis
YKF
Kitchener
$483 Roundtrip, found 3 hours ago
$483
Roundtrip
found 3 hours ago
Select Air Canada flight, departing Fri, Jan 16 from St. Louis to Kitchener, returning Sun, Jan 18, priced at $483 found 3 hours ago
Air Canada
Mon, Jan 19 - Sat, Jan 24
STL
St. Louis
YKF
Kitchener
$541 Roundtrip, found 1 day ago
$541
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Jan 19 from St. Louis to Kitchener, returning Sat, Jan 24, priced at $541 found 1 day ago
Air Canada
Tue, Feb 3 - Thu, Feb 5
STL
St. Louis
YKF
Kitchener
$541 Roundtrip, found 2 days ago
$541
Roundtrip
found 2 days ago
Select Air Canada flight, departing Tue, Feb 3 from St. Louis to Kitchener, returning Thu, Feb 5, priced at $541 found 2 days ago
Air Canada
Fri, Jan 9 - Sun, Jan 11
STL
St. Louis
YKF
Kitchener
$550 Roundtrip, found 1 hour ago
$550
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Fri, Jan 9 from St. Louis to Kitchener, returning Sun, Jan 11, priced at $550 found 1 hour ago
Air Canada
Mon, Mar 30 - Sat, Apr 4
STL
St. Louis
YKF
Kitchener
$558 Roundtrip, found 1 day ago
$558
Roundtrip
found 1 day ago
Select Air Canada flight, departing Mon, Mar 30 from St. Louis to Kitchener, returning Sat, Apr 4, priced at $558 found 1 day ago
Air Canada
Thu, Feb 12 - Fri, Feb 13
STL
St. Louis
YKF
Kitchener
$578 Roundtrip, found 1 hour ago
$578
Roundtrip
found 1 hour ago
Select Air Canada flight, departing Thu, Feb 12 from St. Louis to Kitchener, returning Fri, Feb 13, priced at $578 found 1 hour ago
Air Canada
Fri, May 8 - Mon, May 11
STL
St. Louis
YKF
Kitchener
$588 Roundtrip, found 10 hours ago
$588
Roundtrip
found 10 hours ago
Select Air Canada flight, departing Fri, May 8 from St. Louis to Kitchener, returning Mon, May 11, priced at $588 found 10 hours ago
Air Canada
Thu, Mar 12 - Sun, Mar 15
STL
St. Louis
YKF
Kitchener
$617 Roundtrip, found 1 day ago
$617
Roundtrip
found 1 day ago
Select Air Canada flight, departing Thu, Mar 12 from St. Louis to Kitchener, returning Sun, Mar 15, priced at $617 found 1 day ago

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Flights from St. Louis (STL) to Kitchener (YKF)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Region of Waterloo Intl.
Airlines serving
Air Canada
Roundtrip price
$408
Distance
612 mi

St. Louis to Kitchener Flights

The cheapest times to fly from St. Louis to Kitchener

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

 

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

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

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 Kitchener in 2025. You can also book with separate airlines for your outbound and return journeys, from $180 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 Kitchener 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 Kitchener 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 Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF) cost?
Lock in a cheap one-way flight from $180 or cheap return flight from $408 from Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF)?
January is the most affordable month to fly from STL to YKF. Timing your trip outside of the busy season is often the key to finding better fares.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Tailor the search to your trip, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest STL to YKF flight.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF)?
You'll need to hop on a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF). There are no daily direct flights on this route. However, simply filter your search to include one or two stops to find an option that works for you.
What day of the week has the most flights from STL to YKF?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can vary depending on various factors, including the carrier and season.*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 Region of Waterloo Intl. Airport (YKF)?
Choose a flight from Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this time are on average 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.
What airports do you fly into for Kitchener from Lambert-St. Louis Intl. Airport (STL)?
Pearson Intl. Airport (YYZ) is the only airport in Kitchener with direct flights from Lambert-St. Louis Intl. Airport (STL). Explore the options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF) last-minute?
Waiting until just before your trip to book a ticket from STL to YKF often results in higher prices. While it's possible to find some last-minute offers, they aren't always guaranteed. Allow some flexibility in your schedule for the best chance of snagging a bargain.
Is it cheaper to book a STL to YKF flight and hotel package?
Securing a STL to YKF flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Pick from our extensive range of hotels and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Region of Waterloo Intl. Airport (YKF)?
In most cases, you can reschedule or cancel your STL to YKF flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you'd like more details, head to our Customer Service portal.

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*Available to One Key members.