The Westin Seattle welcomes The ICFP 2023 Room Block arriving Saturday, September 2 and departing Sunday, September 10, 2023. All cancellations must be received 72 hours prior to your scheduled check-in date or you may be subject to a fee equal to one night's room and tax. Rate includes complimentary wireless internet service. *Please note that the $25 Destination Fee will not apply to your reservation.