Flying with a chicken is part of the quests issued by Sgt. Winter for the Winterfest 2021 Challenges.
How to Fly With a Chicken in Fortnite
Flying with a chicken in Fortnite is simple. As long as the player is in the correct spots to find chickens, all it will take is to chase one around for a while until you can catch it.
Unfortunately for players, chickens are faster than them, so it may take a few attempts to actually get your hands on one.
The best way to capture a chicken is to build around it, so it becomes trapped, or you can go wild and just run after it. Once you're close enough, press the interact button to grab the chicken.
After the player has the chicken in their grasp, just run and jump to activate the slight floating or "flying" ability.
Now, the challenge is to fly 200 meters. Players can either pick a high spot to jump off with the chicken (such as from a house or mountain), or players can just run along a long strip of land and jump as they travel to float a little bit ahead.