I'm looking at LGA-ATL-FLL next Friday (the 14th). DL1745, DL726.

I check expertflyer.com and I see F0 Y9 B0, F0 Y6 B0 respectively. I was thinking well holiday weekend leisure travel to Florida==makes sense. Then I check Delta and I see they are selling F seats on the same flight for $1794 full F not a discount first ticket. Also, EF.com shows Y only available in economy yet DL.dumb will sell me a Q fare for $729 rt

So why does DL differ from EF.com? I'm well aware that delta will often times sell more seats in a cabin even if every seat is taken because they still come out ahead in the end after VDB etc. But I always thought they reported the correct number of seats for sale in each cabin to EF.com etc.

Stranger, and maybe this is key. If you search EF for LGA-ATL & ATL-FLL seperately you get different results. very different. F3, F9 etc.