Cheep rates to London (no LBC)

Weren't we just talking about cheep rates to fly to London?  British 
Airways is having an autumn sale.

http://msn.expedia.com/daily/advert/BAsale/BAautumnsale.asp

But not from Philadelphia or New York.  We gotta go to DC to get 
the special.

And how come it is $169 to Dublin, which is closer than London?!?
Doesn't it use less gas?

Well, I guess I'm not going.

Allen Hefner
SCCA Philly Region Rally Steward
'77 Midget
'92 Mitsubishi Expo LRV Sport