I have to say this article is either quite late in being published or hasn't been particularly well researched. At the time of writing, there is no travel ban in force. It was suspended by a judge about a week ago and the US Appeals Court upheld the suspension of the ban 4 days ago:
A federal appeals court refused Thursday to reinstate President Donald Trump's ban on travelers from seven predominantly Muslim nations, dealing another legal setback to the new administration's immigration policy.
In a unanimous decision, the panel of three judges from the San Francisco-based 9th U.S. Circuit Court of Appeals declined to block a lower-court ruling that suspended the ban and allowed previously barred travelers to enter the U.S. An appeal to the U.S. Supreme Court is possible.
Full article here. So it can't be affecting prices today when the OP article was published.
