Washington breathes a sigh of relief as whirlwind Trump flies out to join First Lady Melania at Mar-a-Lago at the end of another white-knuckle week (but of course he still has Twitter . . .)

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President Donald Trump reunited with First Lady Melania Trump on Friday afternoon for his first weekend getaway from the White House after a whirlwind week which left Washington – and the world – reeling.

'I told you I'd win that election,' he told a crowd that welcomed him in Palm Beach after a flight aboard Air Force One.

The first lady gave him a kiss at the bottom of the stairs he used to exit the presidential aircraft after the flight from outside Washington. 

Traveling with the president aboard Air Force One was Blackstone CEO Stephen Schwarzman, who chairs a panel of business CEOs for the president.

The first lady has had no public appearances since the inauguration. She has been at the couple's Trump Tower home in New York while their 10-year-old son Barron attends school.

The first couple will be attending the white tie Red Cross ball held at Mar-a-Lago, Trump's 'winter White House,' the Palm Beach Daily News reported. The event is considered a highlight of the Palm Beach social season.

US President Donald Trump and wife Melania make their way across the tarmac to greet well-wishers upon arrival at Palm Beach International Airport in West Palm Beach

REUNITED: President Donald Trump and wife Melania make their way across the tarmac to greet well-wishers upon arrival at Palm Beach International Airport in West Palm Beach

First lady Melania Trump greets President Donald Trump as he walks down the stairs of Air Force One

U.S. President Donald Trump walks with his wife Melania Trump on the tarmac after he arrived on Air Force One at the Palm Beach International Airport for a visit to his Mar-a-Lago Resort

First Lady Melania Trump arrives to welcome U.S. President Donald Trump (not pictured) at West Palm Beach International airport

First Lady Melania Trump rejoined her husband, after being in New York during the first days of his administration

Up to 700 guests are expected to attend. The Trump's have been frequent attendees at the event over the last decade.

Among those expected are six ambassadors to the United States, those from Switzerland, Italy, Colombia, Afghanistan, Peru, and Jordan, according to the publication. The U.S. has bilateral trade agreements with Colombia and Peru, and maintains a military presence in Afghanistan that is propping up the government.

Royals are also among those expected, with Prince Charles and Princess Camilla of the Italian dynasty Bourbon-Two Sicilies, the Duke and Dutchess of Marlborough, Lady Henrietta Spencer-Churchill, Princess Clotilde d’Orleans, Prince Charles Philippe and Princess Diana d’Orleans, according to the publication.

Some of the best locations inside the luxury property that Trump purchased and rents as a club will go for $50,000. 

The party itself is expected to cost $400,000, according to a permit filed with the town, the Palm Beach Post reported. It expects to raise $950,000, with an in-kind contribution of $200,000.  

UPGRADE: Trump arrived at West Palm Beach International airport aboard Air Force One, and was greeted by First Lady Melania Trump

First lady Melania Trump left Washington after her husband's inauguration

NEXT STOP MAR-A-LAGO: President Donald Trump walks with his wife Melania Trump on the tarmac after he arrived on Air Force One at the Palm Beach International Airport for a visit to his Mar-a-Lago Resort for the weekend

President Donald Trump tosses a sharpie pen that he was using for autographs back to the group that greeted him after arriving on Air Force One

President Donald Trump pauses to speak to media as he walks from White House to the South Lawn on his way to Palm Beach for the weekend

President Donald Trump walks up the steps of Air Force One at Andrews Air Force Base, Md

President Donald Trump walks up the steps of Air Force One at Andrews Air Force Base, Md.

BUSTED: President Donald Trump chats with reporters on board Air Force One before departing from Andrews Air Force Base in Maryland

First Lady Melania Trump is rejoining her husband at Mar-a-Lago, where the couple are expected to attend the annual Red Cross ball

President Donald Trump walks to Marine One on the South Lawn of the White House

President Donald Trump makes his way to board Air Force One before departing from Andrews Air Force Base in Maryland

President Donald Trump gives the thumbs-up as he walks from White House in Washington

HAPPY HOUR: President Donald Trump gives the thumbs-up as he walks from White House in Washington, Friday afternoon to depart for Mar-a-Lago

SEE YOU IN A FEW WEEKS: First Lady Melania Trump went to New York immediately following her husband's inauguration

GETAWAY: Protests that erupted at U.S. airports following Trump's immigration order are expected to follow the president to Mar-a-Lago

LET'S DO THIS AGAIN: Then-President-elect Donald Trump arrives with his wife Melania for a New Year's Eve party December 31, 2016 at Mar-a-Lago

For the president, who must travel with a full compliment of security and technology, getting there won't be cheap. The trip will leave taxpayers on the hook for about $3 million, due to travel costs associated with bringing a full retinue of security and personnel wherever the president goes, Politico reported.

It's an issue Trump knows something about, having ridiculed President Obama for his own pricey trips to Hawaii and other locales. 

The ball is a fundraiser for an organization that has been dealign with the fallout from Trump's immigration order, which initially left immigrants stranded in airports.

A Red Cross spokeswoman told the Associated Press the group "will provide basic support to stranded travelers affected by the order, including providing food and water at ports of entry; blankets, toiletries and other aid; and health, mental health and spiritual care services." 

More than 1,000 protesters have indicated on Facebook that they will attend the "March to Mar-a-Lago for Humanity."

Miami resident and protest organizer Stephen Milo told the AP, "The Red Cross does good things, but there's some irony in having the fundraiser there, and I do want to shed light on that. Wait a minute — you're talking about alleviating human suffering and you're having this event here?"

The club recently drew media attention for doubling its dues to $200,000. Donald Trump Jr., who along with Eric Trump began running the Trump Organization when Donald Trump became president, is listed as the director in state business records.

According to the White House, 'This weekend the president will be shifting the operation of the White House to the Winter White House at Mar-A-Lago. While in Florida, he'll hold meetings and calls with advisers and staff and plan for another big week of action on behalf of the American people.'