It depends what you include and amortise over that flying hour.
The number generally bandied about for the Hornet is $25K which takes into account fuel & consumables, crewing, maintenance, spares etc. I heard reliable numbers north of $150K for the F-111 in its twilight years, although anecdotally this number dropped considerably during surges as the Pig just loved to be flown.
NREs, facilities, sims, tech pubs, training, upgrades and staffing are not included in this number.