Thor has flown in a quinjet lots of times without personally holding Mjolnir, so I assume an airplane would be fine.
ETA: Though I suppose it is possible quinjets are more worthy than civilian airplanes.
Thor has flown in a quinjet lots of times without personally holding Mjolnir, so I assume an airplane would be fine.
ETA: Though I suppose it is possible quinjets are more worthy than civilian airplanes.