Thanks for the info.

i have an alternate flight booked out of Frankfurt too, just in case. But if there are long delays on this it might not help either - I’ve been seeing around 1h30m or so delayed arrival from Frankfurt in recent days in to HND.

Are they flying south of Russia for the Frankfurt route to avoid Russian airspace instead? Because the delay in FRA arrivals doesn’t seem to correspond to the roughly 4.5 hour delays expected for LHR departures flying north over Russia?