Minimum

Yea I meant max. Sorry. Post edited.
Either one of these may scoot through at 63-62.5" for a double case and if you could keep them under 50 lbs you maybe able to avoid baggage fees.
This case includes a rigid foam bunk-bed style system for protection and stable positioning of two bows or a bow/rifle combination, as well as an overall 10" depth for more gear storage. SKB iSeries Injection Molded Mil-Standard Waterproof Cases are molded of ultra high-strength polypropylene...
www.skbcases.com
SKB Cases is a manufacturer dedicated to travel, storage, and shipping protection needs for music, pro audio, sporting goods and industrial applications including government and military contract fulfillment.
www.skbcases.com
Multiple single bow cases work.
I went with the 46" long case specifically to be able to fit a gun as well. Or to be able to put 3 or 4 guns in a case as we normally travel in groups.
No problem on the help happy to sir.