It seems that the plane had to go all the way around the closed airspaces of Finland and Norway (well, Scandinavia) to reach the Atlantic. Or maybe it's the projection.
The reciprocal closure of Russian airspace over Siberia to European and US airlines has a bigger impact on cross-continental flights. The London-Tokyo has been trending in the news, since it's now 3 hours longer and has to go over Alaska, [but I think the bigger impact is on nonstop flights like Washington, DC - New Delhi. These must be completely non-viable now for US carriers.]
edit: Chicago - Delhi was not actually routed over Siberia and is only 1.5 hours longer now: https://www.flightradar24.com/data/flights/ua898