3 doctors weighed in:

How long does it take to lose consciousness without airplane pressure?

3 doctors weighed in
Dr. Sarah Kohl
Travel Medicine
2 doctors agree

In brief: Several minutes

Airplanes are pressurized to keep you relatively comfortable: set to alttudes between 6, 500 and 8, 000 ft.
Sudden decompression while flying at altitudes of 30, 000 ft is an emergency. It is very cold and the oxygen level is very low. You will pass out within a few minutes due to low oxygen, that is why the plane is equipted with emergency oxygen masks.

In brief: Several minutes

Airplanes are pressurized to keep you relatively comfortable: set to alttudes between 6, 500 and 8, 000 ft.
Sudden decompression while flying at altitudes of 30, 000 ft is an emergency. It is very cold and the oxygen level is very low. You will pass out within a few minutes due to low oxygen, that is why the plane is equipted with emergency oxygen masks.
Dr. Sarah Kohl
Dr. Sarah Kohl
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