The 9th house also rules higher education, religion, philosophy, law and great literature.
The 3rd rules short-distance travel.
But you might also look at the situation of Jupiter, as well as the planetary ruler of the sign on the cusp of the 9th house.
Please keep in mind that the solar return is really just a snapshot of the sky on your birthday. It doesn't show transits that will occur later in the year. Annually, the sun, Mercury, and Venus will transit our 9th houses, and the moon will transit it every month. Mars will transit it every two years.
Then I don't take such a fatalistic view towards astrology, such that a solar return chart dictates people's travel in a yes-or-no fashion.