Rosy evening clouds and lone ducks fly together.; Sunset clouds float with the lone wild ducks.

落霞与孤鹜齐飞。

《新英汉大辞典》

Thumbelina is so light that she can fly together with a feather.

拇指姑娘身体很轻，可以和羽毛一起飞翔。

youdao

May all lovers fly together forever, no matter morning or evening!

祝愿有情人永远双双对对飞，不管清晨还是夕阳！

youdao

They became the first African-American men to fly together on a shuttle mission.

VOA: standard.2010.02.02

Expect to hear more about these shrewd but superstitious brothers (they consider 13 to be their lucky number and won't fly together).

FORBES: The Ruias Return

The two Edinburgh passengers cannot then fly together.

ECONOMIST: Business travel

Then we have the Flying Monkeys: when lots of investors fly off together in a bad direction.

FORBES: Wizards, Witches, and Flying Monkeys