Entirely unrelated to the content, but wow, that's a horrific URL. There's a #hackernews channel on Freenode that streams front page news - the URL took up 4 lines and got reported as a bug, as it looks like one.
We tried to test it beforehand but it's hard to prepare for such a number of users :) We've launched just 3 weeks ago. If you leave the site open it loads after a while, or you can bookmark it and come back - it's worth it :)
How much load are you talking about? Once it finally loaded for me, I gave up after about 45 seconds. I suspect you're doing some really cool things on the backend, in terms of checking permutations of flights and wiring together the cheapest rates. Still, I wonder if you're doing anything with your Angular front-end that really hurting usability.
Round Trip, SFO<->PEK mid-November, non-stop on United currently $477, per Hipmunk.
Last time I saw fares this low was in 2006, where I flew SFO<->LHR for about $450. $250 of that was fees & taxes. United got $100 to fly me non stop to London.