Okay someone - what flight time do you need to be a 737 FO ...in the USA?
tfx,
If you're asking as someone
without a green card or US citizenship, I'm not aware of any US 737 operators taking E3s. Someone will correct that if I've overlooked anything.
A regional is your best bet if you want to head up here. Nothing wrong with ERJ/CRJ experience as a springboard to other things.
As for 737 FO spots, it ranges in the 1500-2500 hour area by my casual recollection. There's quite a range of quality to those jobs. Google knows everything so we don't have to.