What happens when a Frontier flight gets delayed by 3 hours or more? When there is a delay in Frontier flight for 3 hours or more the passengers get Frontier 3 Hour Delay compensation. As indicated by Frontier Airlines guideline, you are qualified for a voucher for the sum matching the delay span. The voucher doesn't rely upon the travel date and can't be utilised following 90 days of its issue.In case the traveller does not wish to fly, then, they can be remunerated with a refund,