Six Flags is currently running a special on season passes through the end of the year. If you buy up to four you can get them for around $75 including tax and handling if you buy one it's closer to $95.
There are only certain days you can bring a friend for free. It's not every day. You can usually get a year plus a few extra months oct-dec of the previous year in one season pass. Our two passes costs roughly 14/mo. Significantly cheaper than paying full price to go once. But you'll need to go at least 3 times for the passes to pay for themselves.
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