The fight took place outside of Japan’s airspace. That’s more important than the 50km distance Hawks gave for their landing point, since that means they were 300+ km from the mainland going by Japan’s airspace map.
The only way for the belief that she was 50km from Japanese airspace AND a mainland Air Force base airport to be true, is if she was heading to an airport in the Hokkaito region, which make zero sense since I can’t seem to find any American AFB’s in the northern part of that region where she would land. The closes military Air Force base where they would be able to land that is near Hokkaito would’ve been Misawa Air Force base, which can only be approached, from the US, over 300+ km of Japanese Airspace.
So unless there’s another Air Force base that Star was headed towards, the statements “she’s 50 km from the landing point” and “she’s about to enter our airspace” point to her planning to land somewhere that is not on the mainland, which would be an aircraft carrier of sorts or a small island of unknown name or origin that happens to have a military base on it.
As we’ve seen with New Order, the objects she affects do things that are not exactly natural, even if the rule applied to them doesn’t imply the effect. For example, she stated “I can hold lasers,” and the laser became bendable as well as being holdable by her. So making the claim that her rule of a giant formed in her body’s image shaped by the air can’t produce force equivalent or greater than her own force simply because of the material used is a strange stance given the oddities involved with her Quirks usage.
Also, air pressure in this verse is treated as a physical punch if you are strong enough. Star swinging a punch and clapping her hands with her strength rule active would be producing force enough to harm Shigaraki, and her Giant would be mimicking her, likely taking her actual strength into account and simply scaling it up.
The specific panel I’m referring to, where the words “Interconinental Cruise Punch” are stated, is before the actual explosion has happened yet. That’s just the beginnings of the explosion before all the water is displaced and vaporized by the fireball created moments later, which pushes back the jets. The clouds are not yet affected heavily by this explosion, and even if they were, the attack only seems to push them in a horizontal manner, not vertically. If the clouds were pushed vertically, they would be curved upwards, not making a flat disk.
