We can always pretend the NPC is lying or insane.
With that said, we should remember that this is fantasy and we can twist reality a bit. What's more, we can twist it a bit further because this isn't just fantasy but also cooperative storytelling, and nobody wants to spend a month roleplaying walking from one city to the next. Sure, you could go ahead and make a time skip, but then people are just going to get confused, and there are many things that could happen in a month of in-universe time.
With the interests of rapidity but also of consistency and coherency in mind, I think stating that it takes a week of travel from Gridania to Limsa Lominsa is decent enough. It gives you time to roleplay the journey if you want, and if you decide to skip it for whatever reason you do not break the flow of everyone's micro-canonical chronology too much.
Though, of course, if you want it to take a month you can also go with that. But I do not feel that is fast enough for a fantasy setting where most characters are controlled by a person. We all have things to do, after all.
With that said, we should remember that this is fantasy and we can twist reality a bit. What's more, we can twist it a bit further because this isn't just fantasy but also cooperative storytelling, and nobody wants to spend a month roleplaying walking from one city to the next. Sure, you could go ahead and make a time skip, but then people are just going to get confused, and there are many things that could happen in a month of in-universe time.
With the interests of rapidity but also of consistency and coherency in mind, I think stating that it takes a week of travel from Gridania to Limsa Lominsa is decent enough. It gives you time to roleplay the journey if you want, and if you decide to skip it for whatever reason you do not break the flow of everyone's micro-canonical chronology too much.
Though, of course, if you want it to take a month you can also go with that. But I do not feel that is fast enough for a fantasy setting where most characters are controlled by a person. We all have things to do, after all.