Want to hook up with other travelers to cut costs or find companionship? Well, the matchmakers have gone online.

If you’re planning to take a cab to or from a New York area airport, why not split the cost and share the ride?

Hitchers.com is a free site that can set that up.

You can also plan cab sharing on AirTroductions, but its main purpose is to connect air travelers. The downside is the $5 fee per “airtroduction.”

And finally, TripUp, Soul Escape, and 2 Instead Of 1 offer social networking and trip-long companions, among other online offerings.

All three sites are free and have members all over the world, with most looking for vacation companions, but some looking for love.

Get more ideas in our Solo Travel section.