https://support.hammerhead.io/hc/en-us/community/posts/29744490677787--88-88-29-14-67-united-date-change-policy-within-24-hours-Full-Guide
The 24-hour timeframe begins at the time you book your ticket.
All flights for all passengers on the reservation must be cancelled within this timeframe; partial cancels are not eligible for this policy. Requests for refunds will be credited back in the original form of payment.
