While his old passport was in transit, he tried to apply for another visa but was refused due to a 2002 arrest in the US following an altercation at a night club when he was maced by an undercover police officer.
Hunt was eventually released without charge but it's understood that arrest is a spanner in the works.
Hunt has travelled to the USA numerous times in the past decade on his existing visa but because Hunt's flights have been scheduled for the evening, nobody in the US has been available to help due to the time difference.
The UFC are treating the situation seriously and it's believed president Dana White is personally helping to clear up the situation.
Hunt's long-time trainer Steve Oliver said they expected to have the drama sorted by this evening.
"We got to the gate yesterday but got denied at the gate," he said. "It's getting silly. Immigration's saying it's alright. We get there and we are getting spat out."
Hunt is currently on a four-fight win streak in the UFC and is confident it will all be ironed out and the bout will go ahead.
"It hasn't been too bad," Oliver said in regards to the team's stress levels. "But we need to get over there and it puts a bit of a hiccup in our training."
Hunt has documented his struggles on his verified Twitter account during the week but could finally be on a plane tonight.
