circuitous route(букв. и перен.: "he took a circuitous route to avoid the accident site"; "this is quite a circuitous route to achieve your goal!" Рина Грант)
by a circuitous route('Otherwise why should not her luggage have been openly labelled for Baden? Both she and it reached the Rhenish spa by some circuitous route.' (Sir Arthur Conan Doyle)ART Vancouver)