Which airline is better to travel from LHR-MNL, Korean Air or Cathay Pacific Airways?

I don't want to malign Korean Air, but Cathay Pacific has had the reputation of being one of the best airlines in the world for quite some time now. If the price is comparable - I'd fly Cathay

Korean Air will mean a stop in Souel while Cathay will have a stop in Hong Kong. Cathay have been known to provide excellent service from economy to the best first class service in the world.

I haave a website which is airline reviews by normal people (not paid reviewers). Give it a read, it has influenced my travels before!

Both are great, world-class airlines. If you have a liking for Korean food or would like to do some shopping/sightseeing in Incheon or Seoul, I recommend Korean Airlines. Otherwise, I'd recommend Cathay, one of the world's best airlines.

Have you considered Oasis from Gatwick to Hong Kong and then Cebu Pacific from there? It's far cheaper than the "main" airlines and the service isn't much different.

Cathay is probably a little better, but that said it comes down to flight times. You can go to www.orbedia.com and start your travel search there with the shortest flight times.