Originally Posted by rwinn

How about this for December 11 for 4,888 miles: http://www.gcmap.com/dist?P=sea-bwi-...a&DU=mi&SU=mph

SEA-BWI on AS (2,335 miles) and BWI-SLC-SEA (2,553 miles) on Delta: http://goo.gl/flights/Lvza

Currently showing $385 with similar fares for a few days out... but you may have to book separately or fiddle around with OTAs, I couldn't replicate it with Hipmunk or Oribtz as a RT.