When you are on a flight, the general etiquette and customary practice for armrest usage is that the passenger in the middle seat has access to both the left and right armrests. The passengers in the window and aisle seats typically have access to the respective armrests on their side.

However, it’s important to remember that this can vary depending on the specific situation and the dynamics between the passengers. In some cases, passengers may negotiate or share the armrests to ensure a more comfortable and amicable experience for everyone.

If you find yourself in a situation where there is a disagreement or discomfort regarding armrest usage, it’s advisable to communicate politely with the other passengers to find a mutually agreeable solution. Respect and consideration for fellow passengers’ comfort can help create a more pleasant travel experience for everyone onboard.