$439 Cheap Flights from St. Louis (STL) to Yellowknife (YZF)

View $439 flight on Mon, Jan 19, 2026Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Yellowknife, NT (YZF)

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Cheap Flights from St. Louis to Yellowknife (STL-YZF)

Prices were available within the past 7 days and start at $439 for one-way flights and $632 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Jan 26 - Sun, Feb 15
STL
St. Louis
YZF
Yellowknife
$632 Roundtrip, found 3 days ago
$632
Roundtrip
found 3 days ago
Select United flight, departing Mon, Jan 26 from St. Louis to Yellowknife, returning Sun, Feb 15, priced at $632 found 3 days ago
United
Thu, Jan 29 - Sun, Feb 15
STL
St. Louis
YZF
Yellowknife
$639 Roundtrip, found 3 days ago
$639
Roundtrip
found 3 days ago
Select United flight, departing Thu, Jan 29 from St. Louis to Yellowknife, returning Sun, Feb 15, priced at $639 found 3 days ago
United
Sun, Jan 18 - Fri, Jan 30
STL
St. Louis
YZF
Yellowknife
$672 Roundtrip, found 3 days ago
$672
Roundtrip
found 3 days ago
Select United flight, departing Sun, Jan 18 from St. Louis to Yellowknife, returning Fri, Jan 30, priced at $672 found 3 days ago
United
Sat, Dec 6 - Tue, Dec 16
STL
St. Louis
YZF
Yellowknife
$685 Roundtrip, found 3 days ago
$685
Roundtrip
found 3 days ago
Select United flight, departing Sat, Dec 6 from St. Louis to Yellowknife, returning Tue, Dec 16, priced at $685 found 3 days ago
United
Tue, Jan 6 - Fri, Jan 23
STL
St. Louis
YZF
Yellowknife
$697 Roundtrip, found 3 days ago
$697
Roundtrip
found 3 days ago
Select United flight, departing Tue, Jan 6 from St. Louis to Yellowknife, returning Fri, Jan 23, priced at $697 found 3 days ago
United
Sun, Jan 18 - Thu, Jan 29
STL
St. Louis
YZF
Yellowknife
$703 Roundtrip, found 3 days ago
$703
Roundtrip
found 3 days ago
Select United flight, departing Sun, Jan 18 from St. Louis to Yellowknife, returning Thu, Jan 29, priced at $703 found 3 days ago
United
Sat, Jan 17 - Fri, Jan 30
STL
St. Louis
YZF
Yellowknife
$707 Roundtrip, found 3 days ago
$707
Roundtrip
found 3 days ago
Select United flight, departing Sat, Jan 17 from St. Louis to Yellowknife, returning Fri, Jan 30, priced at $707 found 3 days ago
Air Canada
Tue, Jan 20 - Tue, Feb 3
STL
St. Louis
YZF
Yellowknife
$710 Roundtrip, found 3 days ago
$710
Roundtrip
found 3 days ago
Select Air Canada flight, departing Tue, Jan 20 from St. Louis to Yellowknife, returning Tue, Feb 3, priced at $710 found 3 days ago
Air Canada
Sat, Jan 17 - Sat, Jan 31
STL
St. Louis
YZF
Yellowknife
$712 Roundtrip, found 3 days ago
$712
Roundtrip
found 3 days ago
Select Air Canada flight, departing Sat, Jan 17 from St. Louis to Yellowknife, returning Sat, Jan 31, priced at $712 found 3 days ago
WestJet
Wed, Jan 28 - Mon, Feb 16
STL
St. Louis
YZF
Yellowknife
$1,381 Roundtrip, found 3 days ago
$1,381
Roundtrip
found 3 days ago
Select WestJet flight, departing Wed, Jan 28 from St. Louis to Yellowknife, returning Mon, Feb 16, priced at $1,381 found 3 days ago

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Yellowknife Airport (YZF) cost?
Lock in a cheap one-way flight from $439 or cheap return flight from $632 from Lambert-St. Louis Intl. Airport (STL) to Yellowknife Airport (YZF) 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 Yellowknife Airport (YZF)?
The cheapest month to fly from STL to YZF is January, when demand is low. Off-peak months are generally when you'll find lower airfares between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Yellowknife Airport (YZF)?
To find the cheapest airline that'll fly you from STL to YZF, use Expedia's filter tool. Tailor your search based on your travel needs, such as preferred carriers and ideal departure window. 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 Yellowknife Airport (YZF)?
Nonstop flights from Lambert-St. Louis Intl. Airport (STL) to Yellowknife Airport (YZF) 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 dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from STL to YZF?
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 Lambert-St. Louis Intl. Airport (STL) to Yellowknife Airport (YZF)?
To avoid potential delays on the Lambert-St. Louis Intl. Airport (STL) to Yellowknife Airport (YZF) route, travel before 3 PM. Flights after this time 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 Yellowknife Airport (YZF) last-minute?
Waiting until just before your trip to book your flight from STL to YZF often results in higher prices. While you may find some last-minute discounts, there's no guarantee. Be flexible with your travel plans to boost your chances of snagging a bargain.
Is it cheaper to book a STL to YZF flight and hotel package?
You can save money by securing a STL to YZF flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. Once you've selected your preferred accommodations and flights, you can add extras like car rentals, activities and tours.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Yellowknife Airport (YZF)?
If you reserved your STL to YZF flight within the last 24 hours, you may be able to cancel or modify it without any fees. Depending on the airline and the ticket type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Yellowknife
Roundtrip price
$632
Distance
1924 mi

Book with confidence

St. Louis to Yellowknife Flights

The cheapest times to fly from St. Louis to Yellowknife

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

 

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

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

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 Yellowknife in 2025. You can also book with separate airlines for your outbound and return journeys, from $439 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 Yellowknife 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 Yellowknife 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 Yellowknife Flights

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*Available to One Key members.