How long can a tourist visa stay in the United States at a time?

The US tourist visa can stay for 90 days at a time (subject to the seal of the consulate or the entry and border defense bureau).

1. Generally speaking, American visas issued by travel agencies are for more than ten years, subject to the issuance of the embassy. The maximum duration of a single stay is 90 days (subject to the issuance of the embassy);

2. Travel agencies can apply for business/tourist visas (B1/B2);

3. Generally, the visa issued by the American embassy is valid for ten years (specifically, the visa issued by the embassy shall prevail). But only if the visa is valid. If the visa is valid and the passport has expired, you can travel with the old and new passports.