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---
title: This is the Reason There's a Tiny Hole in Airplane Windows
description: It turns out that itsy bitsy hole in the bottom of your airplane window is actually a very important safety feature.
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author: TIME
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article:published_time: 2017-04-05T20:28:52.000Z
article:modified_time: 2026-10-08T08:27:15.382Z
og:title: The Real Reason Why There's a Tiny Hole in Airplane Windows
og:description: It's actually a very important safety feature
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og:image:alt: Sun over clouds, view through aeroplane window
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![](https://static.time.com/v3/assets/bltea6093859af6183b/blt51fd8191925f47d0/6988c15f7cdbacda0ad57bbb/gettyimages-200135379-001-1-2.jpg?branch=production&width=1200&quality=75&auto=webp&crop=16:9)


# This is the Real Reason There's a Tiny Hole in Airplane Windows

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## TIME Newsletters: Reference Facts and FAQ

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#### What newsletters does TIME publish?

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#### How do I sign up for a TIME newsletter?

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### Sources

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## Video: The Cheapest Places to Travel Each Month of the Year MONEY

[Watch (HLS stream): The Cheapest Places to Travel Each Month of the Year MONEY](https://cdn.jwplayer.com/manifests/BZinDnFy.m3u8) (2:15)

![The Cheapest Places to Travel Each Month of the Year MONEY](https://cdn.jwplayer.com/v2/media/BZinDnFy/poster.jpg?width=720)

_Published 2017-03-24. These are the months to travel to these destinations for the best deals!_


by 

[Erika Owen / Travel + Leisure](https://time.com/author/travel-leisure/)


## Erika Owen / Travel + Leisure


Apr 5, 2017 8:28 PM UTC

by 

[Erika Owen / Travel + Leisure](https://time.com/author/travel-leisure/)


## Erika Owen / Travel + Leisure


Apr 5, 2017 8:28 PM UTC

It turns out that itsy bitsy hole in the bottom of your airplane window is actually a very important safety feature. It’s all-too-easy to let your mind wander when you’re confined to a tiny box of space while hurtling 40,000 feet in the air at hundreds of miles per hour, but rest assured: every single window on the airplane has the same hole. More officially, it’s called a breather hole and it’s used to regulate the amount of pressure that passes between the window’s inner and outer panes. In short, the system ensures that the outer pane bears the most pressure so that if there were a situation that caused added strain on the window, it’s the outside panel that gives out (meaning you can still breathe).

The breather hole also keeps the window fog-free by wicking moisture that gets stuck between the panes. After all, half the fun of an airplane ride is the in-flight scenery shots. Mystery solved.

This isn’t the only question we’ve had when it comes to the airplane experience. For one, if you’ve ever wondered [why airplane windows are round](http://www.travelandleisure.com/articles/why-are-there-ashtrays-in-airplane-bathrooms), there’s a reason for that. There’s [actual science](http://www.travelandleisure.com/articles/airplane-food-tastes-different) behind why food tastes different 40,000 feet in the air, too. And the next time you’re in an airplane bathroom, take note of the [ashtrays that are still there](http://www.travelandleisure.com/articles/why-are-there-ashtrays-in-airplane-bathrooms), even though there are strict laws about smoking on a flight.

_Erika Owen is the Audience Engagement Editor at_ Travel + Leisure. _Follow her on Twitter and Instagram at_ [_@erikaraeowen_](https://twitter.com/erikaraeowen)_._

_This_ [_article_](http://www.travelandleisure.com/articles/airplane-window-hole) _originally appeared on_ [_TravelandLeisure.com_](http://travelandleisure.com)

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