Originally Posted by
reimero
40 minutes is the rule for domestic flights, international flights on widebodies are typically 55 minutes. In my experience, if you're flying a CRJ or ERJ (regional jet), the boarding pass will say 40 minutes but actual boarding begins at 30 minutes.
For domestic flights, my experience has generally trended to an actual boarding starting at the 30 min range even though the boarding consistently states it as 40 min. I have seen this on most domestic flights beyond those operated by CRJs and ERJs.