Present perfect tense and past simple

Hey all,

My question is about the use of present perfect tense. To my knowledge this tense is used for the actions that have started in the past and continues up until now. I have questions about different cases for the same thing:

1)Lets assume that I went to another country for a vacation and I stayed there for a few days. Now today is my last day in that country and now I will return and I am calling a taxi and the receptionist in the hotel asks me how my trip was and I answer him: It's been lovely to be here or to stay here /It was lovely to be here or to stay here

2) I am in the airplane waiting to go back. Now another persons asks me the same question and which tense should I use?

3) I have returned and I arrived at my home country. for example my father asks me the same question and which tense should I use?

Thank you very much for your help.