A google search for "flights from TXL" or "flights to EZE" used to display the schedule of flights operating to that airport. For example, searching flights from TXL you would see a list of cities and # of flights per day:

Frankfurt, Germany - 6-12 flights per day

And clicking on it shows the actual flight #'s and days of the week each operates.

It doesn't *always* show up consistently anymore...sometimes I get a booking form, other times the classic view, and now some newfangled look which I don't like. In true Google fashion, they just can't make up their mind.

Is there any other online service with this data? The only other source I look at sometimes is the airlineroutes blog but it's not easy to search.