That track on the map is south of the direct route, which crosses Mongolia, stays in Russia skirting Kazakhstan, and over St Petersburg to Paris.
If the route was modified south to avoid bits of falling Soyuz, and then military exercises prevented a direct flight from the Kazakh-Russia border to Paris, sending them back North, then I guess the route was longer than normal.
There's also headwinds to face heading West.
But better to stop in Hamburg than press on to Paris?