"depart together" is correct and usable in written English.
It is used when two or more people are planning to leave a place at the same time. For example: We decided to depart together at 5 PM.
When the ceremony starts, they will walk down two separate aisles toward each other — getting their first full glimpse of their dresses at that moment — and then they will depart together down a central aisle.
On Inauguration Day, when it is customary for the president-elect to greet the outgoing president before the two depart together for the ceremony, Eisenhower refused not only to enter the White House but even to leave his car to greet Truman before they drove off together.
He told me his incredible story one day when we were working on 'The Departed' together.
"We have loved every moment bringing the news to you," Mr. Consiglio said, before mentioning "some recent developments" that led the pair to conclude that "departing together is the best alternative we can take".
The three target-area aircraft arrived over Iwo Jima approximately three hours into the mission and departed together at 06:06.
After being shown her future should she accept, Maria declined Sam's offer, and he and Keiron departed together.
The Dream Team argued for most of the match, which led to Greg Valentine and Dino Bravo departing together, without Beefcake.
"HappyBrother23's father and brother-in-law departed together from the gate of the Shanghai Grand Theater at 7 a.m. on May 28, and then took a bus to Nanjing to get on the boat".
"It took them about 20 minutes and then the two ships departed together, again slow when they exited the water, and immediately they sped up to a very high speed.
The three target-area aircraft arrived over Iwo Jima approximately three hours into the mission and departed together at 06:07 The safeties on the bomb were removed at 07 30 90 minutes before time over target, and 15 minutes later the B-29s began a climb to the 30000 feet bombing altitude.
Local group formation in ravens could have been expected, as studies on raven roosting behaviour regularly describe troops of 5 30 birds arriving and departing together (Marzluff et al. 1996; Wright et al. 2003), or even subroost formation (Dall & Wright 2009).
