May I buy travel insurance on the day I travel? Published by Chris Harvey January 8, 2009 Yes, a few travel insurance providers allow you to purchase a policy on your departure day. However, the policy effective date is always the day following purchase. Should a claim situation arise on the day of purchase, you would not be covered. Related articles: One of the members of our family is much older than the rest of us. Does that effect the premium? What does "baggage delay" cover? What is "International Medical" travel insurance? My travel insurance policy excludes hazardous sports? What is considered a hazardous sport? I have already departed from my primary place of residence. May I purchase cancellation insurance for a return trip home?