Check Alaska policy if you have Alaska Air Visa and are enrolled in frequent flyer program. I've had status with them for a long time and get two free bags and standard golf travel bags qualify if under 50 pounds.
Last year I flew Qantas, Cathay Pacific, Japan Air, Icelandair, and British Air, with a golf travel bag. They had good baggage allowances, but British Air allows one in Economy. British Air and Qantas allow two free bags in Premium Economy. I think Cathay does too. In business, you often are allowed two 32 kilo bags free on these airlines.
Always check the website.
Charles Lund