Red circle around airports

i just joined grade 3 :) and i saw these red lines around some airports, what do they mean? pls let me know

thanks

They are TFR restrictions. If you tap on them it shows you what it is.

Hello, and congrats on making it to grade 3! Those are TFRs which are temporary flight restrictions. Some may have to do with what aircraft are allowed, others may have to do with things like runway usage.

check that out

thanks guys!!!

you can close this now