Filing

Yes, you can claim travels expenses for both ways of a trip.

If you are not sure if your medical expense travel meets the "Substantially equivalent medical services were not available near your home." requirement, you can contact the Canada Revenue Agency (CRA) and confirm it with them. 

If you are in Canada or the United States, you can call the CRA at 1-800-959-8281. If you are elsewhere, you can call 613-940-8495. This page has more ways to contact the CRA: Contact the Canada Revenue Agency