Aircraft These are not all the airlines in the world but the ones that hold hands with the SFO Museum collection. There are 1,809 airlines and this is page 93 of 151.

Kalinin K-12 Firebird. It is related to Kalinin (the company) .
Kaman K-16. It is related to Kaman (the company) .
Kawasaki Ki-61 Hein. It is related to Kawasaki (the company) .
Kennedy Giant. It is related to Kennedy (the company) .
Keystone K-47 Pathfinder. It is related to Keystone (the company) .
Keystone K-78 Patrician. It is related to Keystone (the company) .
Kharkov KhAI-1. It is related to Kharkov (the company) .
Kinner Playboy. It is related to Kinner (the company) .
Kinner Sportster. It is related to Kinner (the company) .
Kinner Sportwing. It is related to Kinner (the company) .
Klemm Kl 35. It is related to Klemm (the company) .