Flying is by no means as luxurious as it was in the days of Pan Am. Flights can be an office, time to nap, an opportunity to finish a novel, a chance to catch up with a friend, and for those that fear flying incredibly stressful. Airfare is expensive, but that ticket price does not give you the right to make your fellow passengers miserable.
TONE DOWN THE LOUD CONVERSATIONS
I love flying with my sister. It's a chance to catch up, talk about our trip, and plan blog content. Unfortunately, not everyone cares how excited we are to return to Iceland. To be courteous we talk quietly, don't get too personal, and keep the conversations brief. After all, everyone paid to be on the flight and if they want to nap or read our discussion shouldn't disrupt that. In general, do you want random people knowing tons of personal and identifiable information about you (this sounds like the beginning of an SVU episode)?
DON'T BRING SMELLY FOOD ONBOARD YOUR FLIGHT
One of my favorite airports to layover in is Philly solely because of their Chipotle. Although I love Chipotle, that doesn't mean everyone around me wants to smell Mexican food on the plane. After all what if a fellow passenger is one of those unfortunate souls that got listeria from Chipotle? I would hate to be the cause of someone's food poisoning PTSD (I still cannot even hear "cheese filled bread" after my Georgian food poisoning debacle). Eat your Chipotle in the airport while it's hot and keep the smelly food out of the cabin.
DON'T STEAL THE MIDDLE SEAT ARMREST
Raise your hand if you hate being in the middle seat. Being in the middle seat is horrible, and the only consolation prize is that you get both middle armrests. Stealing the armrest from your middle seatmate is like throwing it in their face that they lost the airline seat lottery. Don't be a jerk and let them have the armrest.
EXCESSIVE PDA IS NOT OK
Would you grope or make out with your significant other if your grandmother was sitting next to you? I would hope not! I know my Grandma Gloria would be sending me bible verses daily and I would "lose" my invitation to all family gatherings if I exposed her to that kind of behavior. A plane is not a hotel room. Your grandma may not be on your flight, but someone else's probably is. Save the PDA for your house or a hotel room and don't traumatize a grandma.