While this clearly isn't an exhaustive list of international airlines, it represents the majority of the ones I've looked into. (And even so, my research is incomplete for a few of them). If you'd like to see stewardess uniforms of other airlines eventually displayed here, just send me a message through Instagram, clearly noting in the first sentence your purpose for writing & the name of the proposed company. As long as I can find legitimate historical resources on the corresponding stewardess outfits, I'd be more than happy to feature them!
Keep in mind that some of these companies are no longer in existence & a few of them rebooted under a different name or were absorbed by another company. (So please don't call your travel agent to try to book a flight under a defunct airline!) And obviously you can't select any of the airline links below just yet because the galleries are still being completed. So I appreciate your patience while I continue to finalize the artwork, learn how to spell, stop trying to compile a working list from memory, and while I also fervently try to research whether or not the Wright Brothers ever employed a stewardess…