Donald Trump will sell any remaining casino assets he owns if his $1 billion-plus bid emerges as the highest accepted offer for the NFL’s Buffalo Bills, The Post has learned.

The Donald is one of three bidders looking to buy the storied franchise, which went on the block after owner Ralph Wilson Jr. died in March.

Separately, the Wilson estate is expected to extend the July 29 bidding deadline, according to two sources close to the situation — perhaps because it was disappointed after only three bidders materialized.

In addition to the outspoken Manhattan developer, Pennsylvania fracking billionaire Terrance Pegula and a group that includes rocker Jon Bon Jovi and two Toronto sports team owners also bid.

Trump has not put a value on his bid, but sources said all the offers submitted topped $1 billion.

Trump and Pegula would keep the team in Buffalo, while the Bon Jovi group would likely move it to Toronto.

Michael Cohen, a lawyer for Trump, declined to comment on any possible sale of casino stock.