Top Websites for Airfares

Okay--we are taking our 'real' honeymoon in December and I'm starting to investigate airfares. We are flying to Asia and I was wondering if anyone had booked international airfares on line and where you have found good deals. I've found great deals on Orbitz, but that was to Europe.

If you have found better deals via a travel agent or company, I would love to know that as well.

Thank you ladies