Is 40 minutes enough for connecting flight?

Is 40 minutes enough for connecting flight?

As a rule of thumb, on domestic routes, you need a minimum of 45 minutes between flights. That’s because you don’t have to go through security, customs, and immigration. Oct 3, 2013

See also  Can a COVID-19 test taken before departure from the US be used to return within the 1-day or 3-day time frame?