$294 Cheap Flights from St. Louis (STL) to Yellowknife (YZF)

View $294 flight on Wed, Dec 24, 2025Opens 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 $294 for one-way flights and $705 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Air Canada
Fri, Aug 22 - Sat, Aug 30
STL
St. Louis
YZF
Yellowknife
$705 Roundtrip, found 2 hours ago
$705
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Fri, Aug 22 from St. Louis to Yellowknife, returning Sat, Aug 30, priced at $705 found 2 hours ago
United
Sat, Dec 27 - Wed, Dec 31
STL
St. Louis
YZF
Yellowknife
$738 Roundtrip, found 6 days ago
$738
Roundtrip
found 6 days ago
Select United flight, departing Sat, Dec 27 from St. Louis to Yellowknife, returning Wed, Dec 31, priced at $738 found 6 days ago
United
Tue, Aug 19 - Sat, Aug 30
STL
St. Louis
YZF
Yellowknife
$746 Roundtrip, found 10 hours ago
$746
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Aug 19 from St. Louis to Yellowknife, returning Sat, Aug 30, priced at $746 found 10 hours ago
Air Canada
Fri, Aug 22 - Sat, Aug 30
STL
St. Louis
YZF
Yellowknife
$756 Roundtrip, found 2 hours ago
$756
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Fri, Aug 22 from St. Louis to Yellowknife, returning Sat, Aug 30, priced at $756 found 2 hours ago
Air Canada
Fri, Aug 22 - Sat, Aug 30
STL
St. Louis
YZF
Yellowknife
$756 Roundtrip, found 2 hours ago
$756
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Fri, Aug 22 from St. Louis to Yellowknife, returning Sat, Aug 30, priced at $756 found 2 hours ago
United
Mon, Aug 25 - Sat, Aug 30
STL
St. Louis
YZF
Yellowknife
$765 Roundtrip, found 10 hours ago
$765
Roundtrip
found 10 hours ago
Select United flight, departing Mon, Aug 25 from St. Louis to Yellowknife, returning Sat, Aug 30, priced at $765 found 10 hours ago
United
Tue, Aug 19 - Sun, Aug 31
STL
St. Louis
YZF
Yellowknife
$769 Roundtrip, found 10 hours ago
$769
Roundtrip
found 10 hours ago
Select United flight, departing Tue, Aug 19 from St. Louis to Yellowknife, returning Sun, Aug 31, priced at $769 found 10 hours ago
Delta
Fri, Aug 22 - Sat, Aug 30
STL
St. Louis
YZF
Yellowknife
$776 Roundtrip, found 2 hours ago
$776
Roundtrip
found 2 hours ago
Select Delta flight, departing Fri, Aug 22 from St. Louis to Yellowknife, returning Sat, Aug 30, priced at $776 found 2 hours ago
Air Canada
Fri, Aug 22 - Sat, Aug 30
STL
St. Louis
YZF
Yellowknife
$781 Roundtrip, found 2 hours ago
$781
Roundtrip
found 2 hours ago
Select Air Canada flight, departing Fri, Aug 22 from St. Louis to Yellowknife, returning Sat, Aug 30, priced at $781 found 2 hours ago
WestJet
Tue, Aug 19 - Wed, Aug 20
STL
St. Louis
YZF
Yellowknife
$1,368 Roundtrip, found 10 hours ago
$1,368
Roundtrip
found 10 hours ago
Select WestJet flight, departing Tue, Aug 19 from St. Louis to Yellowknife, returning Wed, Aug 20, priced at $1,368 found 10 hours ago

Alternative airports near Yellowknife

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

Select flight to Yellowknife, NT YZF. Cheapest and Closest option available. Average driving time to city center is 6 minutes. Flights from $746
YZF
Yellowknife, NT
CheapestClosest
Average driving time to city center6 min
Flights from $746
Flights from St. Louis (STL) to Yellowknife (YZF)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Yellowknife
Roundtrip price
$704
Distance
1924 mi

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 August. 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 $294 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.

 

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 $294 or cheap return flight from $705 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 August, 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.

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*Available to One Key members.