First time flying first class? Avoid being the most annoying person in a premium cabin with these 4 etiquette tips

First class is about indulgence, and business class is about sleeping and working comfortably, flight expert Gilbert Ott says.

Christian Charisius/picture alliance via Getty Images "When you wake up, and someone is looking over your space, it's odd," Gilbert Ott says.

Ott is a seasoned first-class flyer who shared a few tips on etiquette in upgraded cabins.

Here's what you should know before setting foot on your first business- or first-class flight.

When you board your inaugural first-class flight , act like you've been there before.

Accept a glass of bubbly without asking what it costs, stick to the overhead bin space above your seat, and please, don't hover over your fellow upgraded passengers.

When flying up front, etiquette is key for blending in with the first-class crowd, especially if you've never been in a premium cabin .

The same goes for business class .

Passengers in first and business class may be spoiled with welcome gifts, multicourse meals, and private lounge seats.

Although tickets aren't cheap, credit card and airline rewards programs have made the top-tier cabins accessible to travelers who accumulate points and miles.

If you're upgrading a flight for the first time, Gilbert Ott , who flies an estimated 200,000 miles a year, has a few tips to help you blend in and avoid annoying more seasoned premium passengers.

Don't ask whether everything is free in first class. imaginima/Getty Images "I think the etiquette is that first class is about indulgence," Ott told Business Insider.

Ott doesn't recommend asking flight attendants whether each bonus offering is free because everything is complimentary, from meals to sparkling wine.

And there's nothing wrong with "filling your boots" to make the most of the perks, he added.