Yes, there is no problem with that. Your embryos will be okay, floating freely inside your uterus. You can travel without being concerned about staying laying down, or your embryos falling out after transfer.
Read the full article on: What to do after embryo transfer? – Recommendations ( 62).

Andrea Rodrigo
B.Sc., M.Sc.
Bachelor's Degree in Biotechnology from the Polytechnic University of Valencia. Master's Degree in Biotechnology of Human Assisted Reproduction from the University of Valencia along with the Valencian Infertility Institute (IVI). Postgraduate course in Medical Genetics.