Travellers often become emotional watching films on planes because low cabin pressure causes mild hypoxia, dehydration and travel stress reduce emotional control, according to scientists.
Scientists say lower-than-usual cabin pressure causes mild hypoxia of the brain, which affects our ability to moderate emotion and manage stress. That helps explain why so many passengers become tearful during in-flight movies.
I rarely get weepy in front of the TV at home, but I can be a mess watching a movie on a plane. The film does not have to be something sad like Hamnet. I have been known to shed a tear watching Grease. As soon as the music wells up, I well up.

You could say I am a fully subscribed member of the Mile Cry Club. I am not alone in this. It is well documented that people tend to get overly sentimental on flights, and not just the ones who get stuck into the beers. Dehydration from dry cabin air leads to fatigue, which also causes less emotional resistance.
Add jet lag, alcohol and sleeping pills or tranquillisers to the mix and a flight can become an emotional roller-coaster before you have even tuned into Love Actually. In the air, our critical faculties can turn to mush. I have often eagerly rewatched a movie I enjoyed on a plane and found to my surprise it was absolute rubbish.
Maybe a smaller screen hides all the flaws, but I think it is more likely that lack of oxygen in my brain has created an altered state of perception. Hollywood studios should test all new movies on plane passengers. We would give every one of them 10 out of 10. True, a plane is a hybrid space that is not ideal for watching movies.
In-flight Entertainment Evolves
In the old days, there was only one movie screened in the cabin, so it was more like a public cinema. Now, with on-demand systems where you can choose your own entertainment, it is more like the experience of a private home. But you still share your enjoyment with hundreds of others.
Have you ever watched a particularly adult movie with explicit sex scenes, only to be aware the eyes of the stranger seated next to you are constantly sliding towards your screen? It can be a little embarrassing. The communal thing can also be frustrating when you have just started watching a thriller, only to realise another passenger in your direct line of sight has started the same movie ahead of you. That spoils the plot unless you keep looking away.
When I wander around the cabin I often note that at least half the passengers have tuned into the Marvel universe and similar superhero blockbusters. These movies are mindless, noisy, distracting and perfect for forgetting where you are: hurtling through the lower stratosphere at 900km/h in a tube of aluminium alloy with your knees around your chin. Hypoxia of the brain is not the only thing that accounts for an emotional response to in-flight movies, though.
Travel Stresses Prime Emotions
The stresses of travel that lead up to us taking our seats already prime us nicely for a few tears. Taxi does not show up? Check-in lines that wind around the concourse? A rabble at security?
A flight delay that might mean you will have a missed connection? I sink into my narrow seat and turn on the seatback screen with profound relief that I have made it through these hurdles. If the plane then actually takes off, I am ecstatic. For some people, such as those frightened of flying, taking off is the start of their anxiety.
Separation from loved ones, nervousness about the destination, feelings of loss of control, disorientation, ear pressure discomfort and motion sickness are all elements that can make us extra vulnerable at this time. Even the excitement of going away can create its own kind of psychological change as hearts race, butterflies flutter in the stomach, and hands get clammy.
Anxious Flyers Avoid Horror
I admit that if the flight gets excessively turbulent, I amp up the sound in my headphones so that I do not hear those thumps the wings make going over rough air. Psychologists advise that anxious flyers should avoid movies that heighten psychological arousal, especially horror movies and thrillers. It is obvious that films such as Hijack are not the best choice for nervous passengers.
This story was compiled and edited by the HeadTopics newsroom and HT AI from the reports above.
Mild Hypoxia Cabin Pressure Emotional Passengers Anxious Flyers
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