I was the man that fled by the side door.

Instead she'd flee the house by the back door and leave them to it.

We would not flee by the river, there was no time.

He may have been forced to flee by city officials.

Or perhaps they'd figure he would have fled by some other route.

"Why do you leave your homes and flee by night?"

Perhaps they'd fled by some other means - this thought disturbed him.

He has fled by the time we arrive, leaving his wife to take the heat.

No money was taken and the robbers fled by car.

He then heard others in the woods around him and fled back to his camp by the southern lake.