Even if it means standing in a stationary line for ages.
See also: Why you shouldn't eat on planes
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It's an irresistible impulse. We just can't help ourselves. Plus, we all want to be first on that plane and have the choicest pick of all the seats.
Interestingly, while being the first person to board the plane may mean you get lots of lovely leg room and avoid the curse of a middle seat, it does come with a big drawback.
It could be bad for your health
Aeroplanes expose us to all sorts of germs and airborne nasties, which is why it's important to keep your air vent on .
A study was conducted into how illness spreads on a plane
Boarding the plane first could make you a lot more susceptible to catching a bug, according to research published in the American Physical Society journal, and which The Independent reports.
Different boarding scenarios and processes were studied by Arizona State University. They wanted to figure out how exactly illness spreads on a plane with just one ill passenger.
Their findings showed that when passengers board planes in groups such as first class or families, this increased the risk of other passengers being exposed to infections.
So, if you were sat at or near the front, having been one of the first to get on the plane, you'd have people walking past you to sit down - and you'd be right in the path of all their germs.
Obviously, if you're already ill and sat at the front, that's also bad news for everyone else.
To help prevent the spread of illness, airlines are trying to come up with a way to board passengers which keeps contact and possible contamination to a minimum.