Out of Istanbul
Thirty city pairs.
Distances are great-circle, computed from published airport coordinates (aviowiki open data, CC BY 4.0). Block time includes taxi, climb, routing and descent — it is not a schedule, and it is not a quotation.
Into Türkiye
Sixteen corridors that end in Türkiye.
Between the hubs
Three more, between London, Geneva and the islands.
Inside the United States
Six corridors, priced in dollars.
Not on the list
The route you need is probably not one of fifty-five.
Anywhere else
These are the pages, not the limits.
A page exists where enough people ask the same question. The desk prices any city pair an operator can legally fly, from a grass strip in Anatolia to a transatlantic sector, and the same rules apply: a named operator, the aircraft type written down, and the inclusions listed before you commit.