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Dana White tells TMZ Sports he's thiiis close to closing a deal to host UFC fights on a private island -- where he would fly in fighters on private planes.

YES, THIS IS REAL!!!

The UFC boss tells us he's laser-focused on keeping the business alive during the COVID-19 pandemic -- starting with UFC 249 on April 18.

White says the location for that event is still top secret -- though he's locked up the mystery venue where it will take place for 2 months and plans on pumping out fights every week.

But, after that, White says he's planning to move the Octagon to the island -- where he will set up shop and host fights involving massive international fighters.

White says the deal for Fight Island isn't done yet -- but it's very close. And, no, we don't know what part of the world it's in.

White also revealed the rest of the card for UFC 249 ... which includes some pretty big fights including Rose Namajunas vs. Jessica Andrade and Francis Ngannou vs. Jairzinho Rozenstruik.

Greg Hardy will also be on the card as well as Ray Borg, Jeremy Stephens and more.

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White says every person involved in the fights -- from production staff to fighters -- will be screened thoroughly by a medical team before they will be allowed into the venue. White says safety is the highest priority.

White also talked about Khabib Nurmagomedov -- who was initially slated to fight Tony Ferguson in the main event at UFC 249 until the pandemic left him stuck in Russia. White says people should stop blaming Khabib for being out of the fight, there's nothing he could have done.