All existing Hyatt Regency Mission Bay Spa And Marina reservations made before 1 April 2020 that are for arrivals through 30 June 2020 can be changed or cancelled at no charge up to 24 hours before your scheduled arrival. This includes Advance Purchase Rate reservations. Any Hyatt Regency Mission Bay Spa And Marina reservation you make between 2 April 2020 and 30 June 2020 – for any future arrival date – can be changed or cancelled at no charge up to 24 hours before your scheduled arrival. This includes Advance Purchase Rate reservations. For more information, visit the Hyatt Response to COVID-19 page. Get latest prices on KAYAK now