https://support.communitybrands.com/hc/en-us/community/posts/30735978684557-United-Refund-Policy-%F0%9D%9F%8F-%F0%9D%9F%96%F0%9D%9F%96%F0%9D%9F%96-%F0%9D%9F%96%F0%9D%9F%90%F0%9D%9F%97-%F0%9D%9F%8F%F0%9D%9F%8F%F0%9D%9F%8F%F0%9D%9F%95-Can-I-cancel-my-United-flight-free-of-charge-Complete-Travel-Guide