"on returning from" is a grammatically correct phrase and is commonly used in written English.
It is typically used to talk about what happened after someone returned from a particular place or event, for example, "On returning from school, I had a snack before starting my homework."
Visiting a friend on returning from one of those weddings, I found a yellowing paperback in her bookshelf — a memoir by one of my favorite poets, Mark Doty, about the death of his partner, from AIDS.
He was not an intellectual: on returning from one evening at the opera he wrote, "Went to Covent Garden and saw Fidelio and damned dull it was".
On returning from India, one of our ambassadors, Natasha Kaplinsky, helped lobby behind the scenes for a big breakthrough that came last week on vaccines for killer diseases like pneumonia and diarrhoea, vaccines that will save four million lives.
This fortification wasn't something he noticed as a child, but on returning from a year in California, where "one was always asked to explain where they came from," he said, he started to write about it.
On returning from Exile Dune, Brendan made his one smart move: he lied to his whole tribe, telling them that Taj got a clue and he didn't.
Apparently, one of my neighbourhood's more discerning teenage gangs had heard about my acquisition and, sure enough, on returning from a family trip to Gran's one day, we discovered that our house had been burgled.
It is rather difficult to clearly identify one particular trigger when a child gets a migraine attack in the afternoon on returning from school.
One afternoon, on returning from lunch, I found her crying her heart out at the switchboard.
On returning from Italy, he inherited the family estate and painted only intermittently.
On returning from a mission to England in July 1790, Orléans took a seat in the National Assembly.
(The next night, a Monday, he told Stratou, on returning from work, "Honey, I shut the banks").
