Walk up fares is totally different then advance fare. Yes the walk up fare to BWI can't be beat and in a heart beat I'd book it if I needed to get down to BWI or DC. But the advanced fare it is high compared to B6, WN, and others. NAA should have created two fares for the route, walk up and advanced. Yes I am looking at this from a traveler’s perspective vs. an enthusiast stand point, which in itself are two different perspectives.