Techum?
– No techum in the air, though if takes off on shabbos is a problem on the runway. Even if argue that are 10 tefachuim off the ground, if plane sitting on ground may be a problem
Causing the plane to burn more fuel?
– not sure what melacha that would be? Mavir is it mavir if more fuel gets consumed to do the same “work”? (obviously the plane is doing more work from a scientific standpoint, but I don’t think halacha recognizes that.
for example if I have two cars one gets 30 mpg the other gets 20 mpg is it a bigger melacha to use the less fuel efficient car to drive the same distance? seems doubtful. And of course the amount is negligible
At any rate this has long been discussed regarding cars and busses and Poskim say it is not an issue, comes up with choleh going to hospital or accompanying a child (although are other issues with getting in car/bus on Shabbos)
hotzaah,
– don’t carry outdoors, on the plane is not an issue a plane is not a reshus harabim nor a karmelis nor are you going between reshus hayahcids
Muktze
– Put stuff in a bag that is bassis for heter and issur.
not sayign it is 100% muttar, it definitely isnt shabbosdig, but the issurim are not as great as made out.
It seems to be imore of an inconvenience (understatement) than issur