dans vs par

Question

In one of the previous lesson it was taught that we can use "par" with planes, here I use par but it was market incorrectly.

Accepted Answer

Bonjour Abdul,
When you are talking about how you are travelling, then you will use à for "individual" modes of transport (walking, bicycle, bike etc), en for "group" modes of transport (bus, coach, car, subway, etc) or par with planes.
If you are talking about which means of transport you are "on", then you'll use "dans" (as in "inside").
See here: Question regarding En vs Dans
I hope this is helpful.
Bonne journée !

Answer

"by plane" (par avion...air mail goes par avion) vs "in a plane" (dans avion)