The departure time for my flight from Vienna to Lisbon (TAP) was changed from 13h15 to 18h30 (also the flight number changed). I was informed 2 days before departure about this by text message, but no reason was mentioned.
Does this situation count as a delayed flight (5h15 late) and am I entitled for any compensation (e.g. miles, discount on next flight, etc...)?
If the latter, where in Portugal should I apply for a compensation?
You are eligible for comensation under the European Union's EU261 compensation rules.
Your flight would classify as a "type 2" flight, which for a cancellation occurring less than 1 week before departure, resulting in an arrival delay of more than 3 hours, would be due €400 compensation, paid in cash (ie, not vouchers/discounts/etc).
You should contact the airline themselves to request this compensation.
It seems like your original flight was cancelled and your re-routed flight was delayed for more than 3 hours at the arrival airport.
In your case, the flight distance from Vienna to Lisbon is between 1500 and 3500 km. So, you are eligible to claim 400 euros as compensation from airlines as per EC Regulation 261/2004.
For more details about your air passenger rights and EC Regulation you can read here: https://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=CELEX:32004R0261:en:HTML
