DL has no 737 crews based in SEA. Not overwater. Not any. Remember that DL's intention was for SEA to be an int'l gateway while AS would provide the domestic feed outside of DL's hubs. Since AS wasn't interested in that role, DL is adding its own domestic feed. the crews will follow The 757 is common rated with the 767 and DL does have 757/767 crews at SEA. The 757 is a larger aircraft and is more capable than a 737 in every respect. The only difference between the 757 and a 737 is that the 757 costs more to operate - which should say how confident that DL is regarding the route. JNU is a port of call for many cruise ships. Wal Mart has nothing to do with anything. AS sends multiple 737s per day to JNU in the summer. I'm sure DL's single 757 is just a means by which DL will get a share of a market which is VERY premium priced. Perhaps next summer DL will add JNU - ANC since that is a high demand market as well. Western had a great network in Alaska. NW BUILT ANC airport. DL's west coast network would look great topped by a string of cities up and down Alaska. Maybe DL will christen a Salmon Fifty Salmon.