On the bucket list is going to see the Aurora borealis so might as well hit a game in Calgary or Edmonton. CME's (Coronal mass ejections) are tracked through spaceweather.com so making a spur of the moment trip with high probability of seeing the Aurora isn't a complete shot in the dark.
Has anyone made a winter flight to either of these locations? I'm originally from Atlanta so Flames would be my first choice. I have not been to Canada in decades (saw the Calgary Stampede) and it was far easier to travel in 1970 than in 2016.
I know that I need a flexible airline (not ground) passport but any other suggestions would be appreciated.
Well, um, as a Canadian who has it on the bucket list to spend as little time as possible anywhere east of The Rockies in or approaching winter season, my best suggestion would be to stay home and watch the game on your screen. If you want the full effect of the Aurora Borealis without the ice 'n snow horror, get an awesome printer and some quality paper, print shots off an Internet site and plaster them to your ceiling.
The above strategy 1] will be way cheaper, 2] offers year-round ceiling decorations, and 3] represents a far more humane approach to spending a winter day.
On a tad more serious note, I actually flip over the mountains (from Vancouver) regularly and (sadly for me) frequently enough in the winter months... Think: long underwear, don't be afraid to invest in hats 'n gloves/mitts (and screw fashion - go for warmth!), and it'll all be fine. If in the height of winter, the cold will be crisp, biting, not wet/mushy. Bundle up and you're gold. Edmonton or Calgary, take your pick - both are actually civilized.
We're not talking backwater Canada here, lottsa business goes down btwn the two cities, so whichever destination you choose, you'll find the airport, hotels, taxis, all the local services, etc. to be in full operation (actually takes quite a lot of nasty weather for the locals not to be able to deal). I can't answer to the topic of required docs for internationals (though for sure, you'll need a passport to come near us ;-)), but winter or not, the treks are easy, things go smooth, etc.