jbsay

UA: IAD/DCA<->BUR from $251.60 ai RT
Fare Basis NA21KS

This is a special fare, only valid for travel between 10/28/13 and 10/31/13 (" VALID FOR TRAVEL COMMENCING ON EACH TRIP ON/AFTER 28OCT13. TRAVEL ON THIS FARE COMPONENT MUST COMMENCE BY MIDNIGHT ON 31OCT13.")

Here's a sample routing w/ same-day turn that can be booked as two one-ways on United.com (link via Hipmunk) for $259.40 @ 3.6cpm (7130 PQMs incl. 500mi mins):

Tue., Oct. 29, 2013 | Washington, DC (IAD - Dulles) to New York/Newark, NJ (EWR - Liberty) 5:48 a.m. - 7:00 a.m.
Flight:UA3540
Tue., Oct. 29, 2013 | New York/Newark, NJ (EWR - Liberty) to San Francisco, CA (SFO) 9:24 a.m. - 12:46 p.m.
Flight:UA73
Tue., Oct. 29, 2013 | San Francisco, CA (SFO) to Burbank, CA (BUR) 4:08 p.m. - 5:25 p.m.
Flight:UA6410

Tue., Oct. 29, 2013 | Burbank, CA (BUR) to San Francisco, CA (SFO) 5:55 p.m. - 7:15 p.m.
Flight:UA6410
Tue., Oct. 29, 2013 | San Francisco, CA (SFO) to New York/Newark, NJ (EWR - Liberty) 11:01 p.m. - 7:30 a.m. +1 Day
Flight:UA1452
Wed., Oct. 30, 2013 | New York/Newark, NJ (EWR - Liberty) to Washington, DC (DCA - National) 9:06 a.m. - 10:20 a.m.
Flight:UA4882

IADCAflyer

Havent seen $252 in a while, but $302 is the current rate. Lots of same day turns available.

MadeInTaiwan

I'm seeing $310 now... I think the fare is gone...

abhicoolmax

I missed out. I wanted one badly out of IAD or DCA.