advisor - Signed up for conference, having second thoughts

My advisor suggested that I should sign up for a conference, which I did - I now have to give a 15 minute talk.

However, the conference is taking place very far from me (+20 hour flight), and I am having second thoughts on whether I should go or not. Here are my thoughts:

Pro

• Meet new people/socialize


• Present my work at a talk, instead of merely a poster session

Con

• Conference is only 4 days, two ~20 hours flights are very exhausting


• The audience are not completely aligned with my field, so I have to make my presentation simpler than what the work actually is


• Will not learn things that I directly need for my research because of the audience (they are in geology and engineering, I'm in math)

Honestly, I don't feel like going because of the above list. But I am worried that

• My advisor will think I'm being annoying by "backing" out


• I can't say no now, since I have been given a talk

I would be very happy to hear your opinions on this matter. Maybe I am putting too much thought into this.