MideastIran Issues NOTAM Closing Most Airports in Western Tehran FIR Until May 25All airports in the western part of the Tehran Flight Information Region are closed from 5:46 a.m. UTC on May 22 until 8:30 a.m. UTC on May 25.Defcon LevelMay 22, 2026∙ Paid42ShareMIDDLE EAST, On May 22 Iran’s Civil Aviation Authority issued NOTAM OIIX A1010/26 closing all airports in the western part of Tehran FIR.ShareDefcon Alerts Threat Monitor is a reader-supported publication. To receive new posts and support my work, consider becoming a free or paid subscriber.SubscribeNOTAM Details, Airport Closure Analysis:This post is for paid subscribersSubscribeAlready a paid subscriber? Sign inPrevious