Hello Manolo,
That sounds like a fantastic trip! – Dublin and Madrid make a wonderful combination!
About your question on the ETA: If you’re only visiting Dublin (the Republic of Ireland), then you don’t need an ETA.
The ETA only applies if you plan to cross into Northern Ireland, since that’s part of the UK.
Here are the key things to know about the UK ETA: It’s not a visa, just an electronic travel authorisation linked to your passport.
It costs £16, is valid for 2 years (or until your passport expires), and allows multiple short visits.
Most people get approval within minutes, but it’s best to apply at least a few days before traveling.
You can apply online or through the official UK ETA app.
You can find more information related to the
Electronic Travel Authorisation (ETA) on Tourism Ireland's website.
So, in short: for Dublin only, you’re all set—no ETA needed!
Now, have you already picked out what you’d like to see in Dublin? Hopefully, this list of
top attractions in the city will be helpful!
Wishing you a great trip—can’t wait to hear how it goes!
Best wishes,
Vivian