I'm not super educated on security stuff, but would airplane wifi add any significant risk?
I'd think that as long as your laptop isn't already compromised, and you don't need to use someone's proxy server, HTTPS would be secure enough. I.e., no worse than doing it from home.
The biggest risk is random mobile apps that disable HTTPS certificate checking, run APIs over plain HTTP, etc. On public Wi-Fi, anyone physically near you can intercept or snoop on that traffic.
Browsers generally do a good job of ensuring HTTPS these days, but still you should pay attention to make sure you're on HTTPS when using public Wi-Fi.
Maybe do it while being connected to a network that isn't infamous for its poor security :)