Not that I have found. It you use the ITA matrix model, I have only been able to get it to work with Priceline. Maybe other OTAs work, too, but Delta.com just errors and gives you the lowest fare. Since I want to book on Delta.com, so I don't have to deal with OTAs, this work around doesn't work well for me. I'm sure if you call they can book it in whatever fare class you want as long as it is available.