It will be interesting to see how this plays out. Delta fumbled SEA. Given its investment I can not imagine DL did not run risk scenarios and see AA/AS/oneWorld coming. There is no way SEA can support hubs for AA/AS and DL. Barring AA having to significantly shrink, DL will have to retrench, at best making SEA a focus city, and place more network emphasis on LAX.
AA should be well positioned in SEA with AS, CX and JL to be extremely successful. If AA can’t make SEA work, the whole executive team should be ousted. Was anyone at DL ousted for its SEA mess?
One advantage that AA has over AS, DL, UA, or WN in the SEA market is that AA is the only airline to serve its CLT hub nonstop from SEA.
While DL is currently the only airline serving KIX nonstop from SEA, JL adding SEA-KIX nonstop service might be a possibility due to
(a) JL having a FF base in the Keihanshin (Kyoto/Osaka/Kobe) region to support SEA-KIX nonstop service on JL,
(b) AS having a FF base in Greater Seattle and other Pacific Northwest markets to support SEA-KIX nonstop service on JL,
(c) Business ties that exist between Greater Seattle and the Keihanshin region such as Kyoto-based Nintendo having its North American headquarters in Redmond, WA,
(d) Business ties that exist between the Keihanshin region and other cities in the contiguous U.S. such as Chicago, Cincinnati, Dallas, Indianapolis, and Newark,
(e) JL being able to connect passengers from KIX onto AS and AA flights out of SEA (and vice versa) if it adds SEA-KIX nonstop service,
(f) JL being able to offer connections onto its KIX-BKK/ISG/OKA/TPE flights from SEA if it adds SEA-KIX nonstop service, and
(g) AS would be able to offer 1-stop connections onto SEA-KIX from some U.S. destinations that DL doesn't serve nonstop from SEA if JL adds SEA-KIX nonstop service.
While JL already serves NRT nonstop from SEA, JL could add SEA-HND nonstop service in order to better compete against DL and NH on the SEA-TYO route. JL would also have strong point-of-sale on both the SEA and HND ends of the SEA-HND route if JL adds SEA-HND nonstop service, whereas NH has stronger point-of-sale on the HND end of its SEA-HND route and DL has stronger point-of-sale on the SEA end of its SEA-HND route.