What is best Promotion Method for tour itineraries

Hi,
I have a tour and travel company that needs big promotion in Europe, What are the best promotion method for tour itinerary promotion,i have one specific tour itinerary that need massive promotions , please suggest me .

I mean, SEO is always an option but the travel industry is pretty competitive, and it could take months or years before you see traffic from google...

Other than this, I think Facebook Ads might work (well, PPC and social media in general are good venues if you have deep pockets and / or lots of time). Also, Youtube could work as travel videos are pretty popular. I, alone, have spent entire weeks this year watching traveling vlogs, even though I have no intention of traveling anytime soon

Your site needs to be improved. You can use social networks, blog with videos, customer reviews. You can also promote on hotel websites, etc.