unless you have a valid work permit and all the paperwork, there's not a chance in hell you're getting in here.

I doubt people that are in high risk countries .. aka USA, won't probably be let in until after there is a vaccination, unless they get their confirmed cases down to near zero.

Vietnam is closed to foreigners

I'm sure there will be flights.. but be prepared for a long wait.

make sure you have insurance that covers covid-19 as a good prep to get here, because it will probably be needed.

july 1? how? do you have work permit,etc?

Looking at your prior post, it seems you are wanting to come as a tourist.

there is probably a snowballs chance in hell tourist will be coming back by july 1.

if they do allow it, you can look at what they are asking of people that have a really valid reason for being here; work permits .. which was 100K insurance, 14 day self paid mandatory quarantine, fit to fly certificate,etc.