My guess is it would be on landing - they take off relatively steeply out over the ocean and by the time they get anywhere near downtown (10 miles) they're way higher than that office/condo building.
I've flown in and out of HNL a lot since 1994 (we live on Oahu) and we've never flown OVER the city - always over the ocean. The closest we came was a little 9-seater to Moloka'i that followed the coast pretty closely till we got to the airport. A friend is an Aloha pilot, and unless their restrictions have lifted quite recently, they had rules against getting close to anything of substance, which would include anything over the city.