Upvote:1
You can book a flight without having any kind of visa.
Airlines do not check that you have a valid visa when you book a flight, because lots of people choose to buy a flight before they get the visa.
They will check your visa when you board, and if you don't have a visa by then you will be denied boarding and not given a refund.
Whether you are going to get a US visa, or be permitted to enter the US with or without a visa will depend hugely on the state of Covid-19 at the time.