But that's not the only time it takes.
How long does it take to get to the airport?
How long do you have to be there before the plane takes off?
I never fly, so do not know these,, but I know that when my son's partner flew from Edinburgh to Copenhagen, an extra 3 hours was needed to ensure she got on the plane both journeys, so it wasn't just the time from when the plane took off.
Admittedly you have to be at the right station at the right time, but that's normal. And if you miss it, there's another one soon.