This did not get moved to UA, so you should post there.

april 20,2003 is Easter. Easter is Mid term vacation. Mid term vacation is Florida. same story, re: HNL. Could also be a cruise boat, if cruise boats leave from that area.

UA typically does not assign 20 or 40% of the seats in the back of the plane. That shows up on the lack of seats on the seat map.

UA typically oversells economy by lots of seats if they can. (read the UA board) Maybe even 20%. That shows up as Y9 B5 M2 H0 Q0 V0 W0 S0 or some such. When all go to ZERO (Y in particular), that plane is full plus so much, they know they will never get another person on it.

I just checked going out on that 4/12 or Orbitz, and DL and US are $163 and 193 rt, with one stop. Sounds dirt cheap to me.

UA non stop on 1491 IAD-TPA is $326. There is a possibility they will not ticket.

If they show no seats in Y, then economy is almost certainly well oversold.