If you crash leaves you floating in icy water you're dead in minutes without a dedicated cold water survival suit. Wearing one of those on a regular trans-atlantic flight is a bit over the top for even the most über-prepared, isn't it? I have absolutely no idea of how the rafts on a commercial airline works, but I imagine it could give you perhaps as much as a couple of hours before freezing to death.



That's only good advice if you're dressed for it. If not, I can promise you that slogging through snow is hellish work that will make you very wet, very tired and very soon very cold.

In fact, even dressed for it, slogging through snow _*will*_ make you wet (and tired). If you have to, improvise some snow shoes and poles.

As stated above, if you're stranded in the middle of Arctic nowhere in typical every day clothing, your best bet is to make the best use of whatever you have available for shelter, huddle together for warmth and pray.