I notice that a lot of people ask senders to use “air mail” stickers. Can someone explain this? Does mail these days travel across continents in any way other than by air? I don’t know where I would even get these. I don’t believe the postal service offers them. Will the US Postal Service take my direction on what form of transport they use to get my postcard to its destination? I do understand that 100 years ago when planes were new, this might have been a “thing”. But now?
Any insights into this are much appreciated.
Thanks