Sherpa eVisa Help by Destination Mexico How long is my Mexican eTA valid for? Tessa November 22, 2022 20:13 Your eTA is valid for 30 days once it has been approved. Related articles My travel date to Mexico changed, what do I do? What’s the best way to upload an image of my passport biodata page? How long does it take for the Bahraini eVisa to be approved? When should I apply for a Mexican SAE? My Canadian eTA has been denied, what do I do?