There are many reasons to choose a long distance bus over motor vehicle or plane.
Greyhound bus is $68.28 Saskatoon to Calgary. Actually, I paid $58.28 after a $10 discount for my International Youth Hostel card.
The cheapest flight I can find over the next 30 days is $156.58, the average well over $200.
The main downside is TIME.
Also, WEIRDOS. Weirdos ride alongside the elderly, new immigrants, criminals. And me.

related – 9 ways to avoid weirdos on the bus