http://www.coindesk.com/mexico-tar-latin-america-airline-bitcoin/
"In a statement, Jose Calzadias, commercial manager at TAR, said that the company, which serves 12 destinations throughout Mexico, would continue to evaluate payment options that give "real added value" to customers."
apparently there is another Latvian airline that started accepting bitcoin from July last year.
what do you think the effect of this is on bitcoin?
This is definitely positive, but only a small step. Most people who use those airlines won't know about it. Won't look into what bitcoin is even if they see the payment option either. And mainstream news won't cover this. I don't expect bitcoin price to be affected either. But little by little it always helps.