On flag day, some 32 hornets were in the air, flying over major cities (and that is the reason for that picture with large number of planes on the highway.)
As a curious, and kind of ridiculous side story: some Russian sites now claim that these were instead a sort of provocation, simulated attacks against Russian bases...
Сразу 32 истребителя F-18 ВВС Финляндии пролетели всего в трех десятках километров от границ России, имитируя таким образом массированный скоординированный удар по российской территории. Это одна из первых крупных провокаций, устроенных этой страны и имевшая все признаки реальной
actualnews.org
В небо поднялись 32 истребителя F/A-18 Hornet.
piter.tv
32 истребителя F-18 пролетели в 30 километрах от российской границы, имитируя координированный удар по России
avia.pro
I'm saying this mostly for our Russian members; if you follow these kind of sites, to me they don't appear to be a very good news sources. They quote a post from the Air Force which clearly states "the aim was to show that the air force can be quickly deployed to all parts of the country" in honor of the flag day. And they still claim that the Air Force itself stated that they were "bombing Russian bases".
Or are these Russian versions of the onion?
These flights were a replacement for the yearly parade that was cancelled due to COVID-19.