@0x47df @eta as someone who does this all of the time, If you have a window seat, you can almost [*] get a fix if you put your phone up against the window for ~20 seconds, even if state is reasonably cold.

[*] The only place where this didnt work was the suwalki gap, because of Russian jamming, On the way back I held a GPS lock from ground to past the suwalki gap, but it was extremely marginal.

Maybe the new dreamliners (or w/e the one with with the e-window shades) mess with this, but it's worked for 90%+ of the flights I've taken in the last 4 years