Visa Canada Immigration

Mexicans who have to change planes in the US on their way to europe. Do they need a US visa?

My partner’s mother is traveling from Mexico City to Frankfurt Germany. It is cheaper for her have a flight that makes one stop in a US city, where she would change planes and then fly to Frankfurt, rather than fly directly non-stop from Mexico City to Frankfurt. If she changes planes in the US, I believe she has to go through customs and immigration services prior to leaving for Frankfurt, Germany. Does she need to have a US visa (in addition to her passport) to change planes in the USA? A Mexican visitor to the USA needs a visa in addition to their passport to visit the USA. Does a tourist changing planes at a US airport also need a visa to pass through the USA on their way to Europe?

Randy is correct. there are no such things as transit visas anymore. She will go through a customs check and wait in a special lounge for international travellers. You can go to the website below, enter Meico as her country, U.S.A. as the transit country, and Germany as the destination, then click for the info to confirm this information.