Originally Posted by
xliioper
There are a number of dates in May when you can find a D1 flight on JFK-SEA for a whopping $5 more than the 737 non-D1 flight ($499 vs. $494). And, yes, the D1 equipment is D1 marketed and carries a D1 fare.
Seattle in summer the last several years has had three kinds of flights to JFK:
* Delta One 757s.
* Lie flat 757s with no Delta one.
* 737s
There might have been other variants, but I've flown at least those 3 and several times.