Originally Posted by
moondog
I'm not 100% certain (and I suppose this is pretty easy to check on sites like Flightaware), but I think MU's 2 JFK slot pairs, CZ's single JFK slot pair (already in use before the 2023 Q2/Q3 bilateral), and CX's 21 JFK + BOS slot pairs (not subject to the bilateral) are the only ones that use Russian air space. I'm not sure about the Taiwanese airlines.
Taiwanese airlines cannot use Russian (or for the most part, even Chinese) airspace right now. I recently took CI73 (TPE-AMS)....the route they fly is almost comically circuitous.