Home » Travel Packages Book Early Summer Sale at the Seneca Allegany Resort & Casino Starting at: $92.00 The Book Early Summer Sale at the Seneca Allegany Resort & Casino may be available from 04/23/2019 - 06/30/2019. Save up to 20% OFF this SUMMER! – SUNDAY THROUGH THURSDAY FOR SELECT DATES. Resort fee not included. Blackout dates apply. Other restrictions may apply. Cannot be combined with any other offers. Not valid for groups. Call to book or view online at Seneca Allegany Resort & Casino's website. Price based on double occupany, single occupancy available. Categorized in Spring Summer Email this page Travel Guide It's a full 56-page comprehensive guide, highlighting the activities and attractions in our County and it's FREE!! View the visitor's guide online or request that the Enchanted Mountains guide be snail mailed to you for FREE!