This is a great site, FlightRadar24, as you can track live flights. It has most of the EU flights to Asia on it, but all other EU & US flights. The Philippines is a bit short on planes, more than likely due to the lack of radar, unlike the US & EU which is covered in them.

The best thing about this is you can switch to Cockpit View This loads up a window with the view out of the cockpit window on Google Earth, amazing. So find a flight over the Grand Canyon and see what the passengers and crew are seeing now

You can use the filter to find certain airlines, airports, etc.

I have the app on my Galaxy S3 and if you point it up in the sky at a plane it tells you what it is, and a load of other details about the flight