UPDATE 1-Six Flags faces delisting from NYSE

NEW YORK, Oct 31 (Reuters) - Theme park operator Six Flags Inc SIX.N, already facing delisting for its low share price, said on Friday it received a second letter from the New York Stock Exchange, this one warning about its low capitalization.

Six Flags said it was not in compliance with NYSE's rule requiring it to maintain a market cap, as well as stockholders' equity, of more than $75 million each.

The U.S. company, whose stock tumbled toward the $1 threshold this summer, said it will consider "all available alternatives to achieve compliance" with NYSE's rule. It has 45 days to submit a plan to boost market cap.

On Oct. 2, Six Flags received a letter warning that its stock had fallen below $1, on average, for 30 days. (Reporting by Jonathan Spicer; editing by Carol Bishopric)