Passport: yes, and check the expiration
A valid passport is required to fly to all three destinations. The detail that trips people up is validity: several countries expect at least six months remaining on your passport beyond your travel dates. If yours is close to expiring, renew early — processing can take weeks, longer in busy seasons — so this doesn't become the thing that delays your trip.
Note that for air travel a passport book is required; a passport card alone is for land/sea border crossings, not flights.
Visa: generally not needed for short stays
For tourism or medical visits, U.S. citizens typically don't need a visa for short stays in Mexico, Costa Rica, or Colombia — entry is usually granted for a set tourist period (commonly 90 days, varying by country) on arrival. A dental trip of one to two weeks sits comfortably inside that. You'll usually fill out an entry/tourist form, and some countries have online entry registrations to complete before arrival.
Confirm current rules before you book
Entry requirements do change, so verify the current rules for your specific destination and citizenship before booking — the U.S. State Department country pages and the destination's official entry site are the authoritative sources. Non-U.S. citizens should check their own requirements, which may differ. A coordinator flags the documents and any entry forms for your specific trip as part of planning, so nothing is missed at the airport.
- A valid passport is required to fly to all three destinations.
- Check for the six-month validity rule and renew early if needed.
- No visa is generally required for short tourist/medical stays.
- Always confirm current rules on official sources before booking.