Six Flags has a Labor Day Flash Sale valid from 8/28 - 9/1/2014.
2015 Pass now and use it for free for the rest of 2014
Gold Season Pass Upgrade: Free Parking on Each Gold Season Pass for 2014 &
2015; Admission and Free Parking at Other Six Flags Theme Parks; Bring-A-
Friend Free (on select dates); VIP Early Entry
New England 官网上就有卖。