Donald Trump, Dana White Make Grand Entrance At UFC's Freedom 250

President Donald Trump and Dana White might've just had the best walkout of the night, before a single punch was thrown, arriving on the South Lawn in style!

After a short rain delay -- thunderstorms were in the area -- POTUS and his longtime friend walked out of the White House's Oval Office, making their way to a balcony overlooking the Octagon ... as a 4,000-strong crowd, many military members, cheered from the stands.

Trump saluted while White held his hand over his heart as the National Anthem was played ... culminating with 12 U.S. military jets doing an AWESOME flyover.

After the anthem, the president and Dana walked a red, white, and blue carpet to their seats just feet from the Octagon.

When Joe Rogan got on the mic for the first time ... he summed up the atmosphere like this.

"It's such a scene. It's so surreal. It's so amazing. The energy is in the air. We're outside. We thought it might be called off for rain, but we're good. The whole thing is nuts!"

Of course, Freedom 250 is a historic event ... it's the first time a sporting event has ever been held at the White House.