You should not speak to strangers (or really anyone) on airplanes

When you are boarding, it’s acceptable to let someone know you are sitting next to them, or perhaps say a simple hello. You should always treat others with courtesy, particularly the flight crew (eg, politely letting a seat mate know you need to use the restroom, placing a drink order). And it’s occasionally ok to strike up a conversation while deplaning as the other person is no longer trapped. Other than that, quietly keep to yourself.

The chances the person next to you just wants a moment to themselves is high. They had a long work trip. They are returning from a funeral. They are leaving school after finals. Even if they are relaxed, the chances they want to spend the flight speaking with a stranger who has a solid 50% chance of being insane is also low. No good can come of cornering someone in a tiny metal tube with no escape at 30,000 feet for multiple hours. It can only make someone feel trapped, desperate, and claustrophobic. And we’d all rather just listen to music, work, or watch a movie.

As a bonus, if you are flying with a friend or family member and yelling or speaking loudly you are also a monster. We are all trapped with you. Use your inside voice. No one wants you shouting about your life for three hours six inches from their head. Speak in hushed tones and politely.