“Why are airplanes so hard to see?”/“Because they’re in disguise.”

“Disguise” can sound like “de skies” (the skies). A pun is:
     
Q: Why are airplanes so hard to see?
A: Because they’re in disguise.

   
The joke was posted on Twitter by Seal_Massacre on August 26, 2020, and on Reddit—Dadjokes on August 28, 2020.
   
“Why is it so hard to recognize a pilot?”/“They always travel in disguise” is a similar riddle.
     
     
Twitter
(ᵔᴥᵔ) Seal_Massacre (ᵔᴥᵔ)
@SealMassacre
Why are planes so hard to see?
Because they’re in disguise.
9:33 AM · Aug 26, 2020·Twitter for Android
   
Twitter
spacefem
@spacefem
Okay I’ll tell an airplane joke to make up for it… why are planes hard to see?
.
.
.

Because they’re in DISGUISE!
(get it? AirplaneAirplaneAirplane)
7:51 PM · Aug 26, 2020·Twitter for iPhone
 
Reddit—Dadjokes
Posted by u/NotA_Drug_Dealer August 28, 2020
Take My Energy
Why are airplanes so hard to see?
Because they’re in disguise
COMMENTS
CloudyHero
Hopefully this joke won’t go over anyone’s head.
 
Twitter
keepingitcreel
@Keepingitcreel
Why are airplanes so hard to see? Because they’re in disguise
3:27 AM · Aug 28, 2020·IFTTT
 
Twitter
Vettel
@umarsuleman6789
Why are aeroplanes so hard to see?
Because they’re in disguise
4:29 AM · Aug 28, 2020·Twitter for Android
 
Twitter
laeni c:
@skepsmuse
dad joke of the day: why are airplanes so hard to see in the sky? because the are in disguise… hopefully this joke won’t go over anyone’s head! :D
1:35 PM · Aug 28, 2020·Twitter for iPhone