Travel-type gift certificates?

[Alphathree33]

I'm looking for a last-minute gift for someone who travels a lot.

It'd be nice if I could find a general gift certificate for hotels/flights etc... but the obvious place, Expedia, doesn't seem to sell such a thing?

 

[CrackRabbit]

I know that airlines will sell gift vouchers but I don't think any of the travel sites do.