Sherpa 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? Why haven't I received my Mexican eTA yet? 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?