Ive been getting into flourishing with vintage decks and one thing i always come across are airline decks. They look amazing with the solid color bordered and basic logo on each side...but are they good for cardistry? I cant tell by the pics in ebay listings but i think they might be bridge sized, its hard to tell
Also i found this and i wish this was a whole deck because its the coolest back design ive seen! https://www.etsy.com/listing/287011321/vintage-airline-advertising-single
Originally, airlines were often using poker-sized playing cards for their branded decks, given to customers to use in-flight. As planes became more fully-packed with seats and tray tables became more narrow, they eventually switched to a bridge size, then airlines stopped making them altogether because of the added expense and the narrow margins under which many airlines operate. I don't know of any major airlines that were still offering branded playing cards past the 1990s - and that late, they were few and far between.
The quality of the cards themselves may vary. I'd be careful of using good vintage decks for cardistry - it takes a toll on them. We're talking about artifacts from another age, when flying on an airplane was a big deal and people actually dressed up for the occasion, whereas today it bears a closer resemblance to a cattle drive with a dash of "security theater." The decks are from a bygone era and won't hold up to hard use well at all.
For the most part, you'll find the decks are of "reasonable" quality - most of them were manufactured in an age when even a cheap deck was of decent quality, unlike today's "dollar store" decks that in some cases don't even adequately block light. American-based airlines will probably have had their decks made by either USPC or Arrco - combined, they had the bulk of the airline-deck market in this country. Outside the US, it's anyone's guess. Old Canadian airline decks are probably from IPCC, which is just USPC under another name.
Reasonable quality, however, doesn't necessarily mean good for cardistry; it can depend on your style. Some cardists do lots of cut work and prefer a deck that holds together in packets well, while others are more into flashier fans and spreads and prefer a card with more glide to it. I'd say that if you prefer more glide out of your cards, you'll want a modern deck with a slicker finish to it.
Another thing to bear in mind is that the cheaper airline decks might be smooth rather than embossed - no little "air pocket" effect when cards slide together, meaning they stay together better. Again, better for cuts than anything involving sliding cards against each other.