The phrase "flee something" is correct and usable in written English.
It can be used when describing the act of escaping or running away from a particular situation, place, or person.
Example: "In the face of danger, many chose to flee the city rather than confront the threat."
Alternatives: "escape from" or "run away from".
There were two of them, a couple who had been trying to flee something – fighting, a village being burned, none of us would ever know.
So the administration unleashes its anti-abortion fury on the most vulnerable among us, unaccompanied minors, pregnant and alone, who are here only because they had the gumption or desperation to flee something even worse.
No longer are they leaving in search of something positive, rather they are fleeing something negative.
Both men came to Britain as so many immigrants do, fleeing something else.
With refugees, deterrents don't matter because a refugee by definition is fleeing something.
People come to America, he says, either because they yearn for freedom or because they are fleeing something.
He is fleeing something — a romantic disappointment is mentioned in the first story, and hints of post-apartheid moral exhaustion pervade all three.
With staff members fleeing, something of a solution evolved on its own in the Bronx, and it involved Mr. Medina's favorite program for assisting parents with children in foster care.
Beginning with the surprise arrival of an inscrutable, mute young female relative who's obviously fleeing something terrible (only the spirits can say what), the sense of destiny reaches a painful density.
Although actually, it's more interesting than that, because the first shot fired sends the group fleeing – something the player won't know until they commit to pulling the trigger.
"I'm not fleeing something bad, I'm going to something I want to do more".
