Just to add that (I think) for US forces only possible airfield on Saipan on 24 June was captured Aslito airfield to have a 'friendly bomber' landing.
On youtube there's a film of Aslito, apparently shot on 24 June:
https://www.youtube.com/watch?v=uG8eRR4ZQh4
At around 3:05 there are two OY-1/L-4 types visible and further on in film P-47s (must be 19th/318th FG?) and TBM/TBF Avengers. And a lot of abandoned Japanese airplanes...
Regards,
Leendert