For tours:
You can search combining: (i) a geographic region, (ii) a type of trip from safaris to cultural-historic tours and (iii) five types of solo-pricing.
5 Solo Travel Pricing Methods:
1. No single supplement specials
2. Lower or reduced single supplements
3. Sharing to avoid a single supplement
4. Solo-priced lodging/cabins
5. Single parent offerings-We only found these in Europe. Terms do vary so take a look at what is covered.