| Date | Instrument | Run ID | PI | SA | Nights | Proposal title |
| 1-Feb-2004 | Gecko Red + Cafe | C20 | Bohlender | NM | 2.0 | A large-scale investigation of the small-scale structure of the interstellar medium |
| 3-Feb-2004 | C8 | Manset | NM | 2.0 | Spectroscopy of hot star candidates with recently formed circumstellar dust | |
| 5-Feb-2004 | CFHTIR | C14 | Edwards | OL | 2.0 | Molecular Hydrogen in Cooling Flow Clusters - Detections in Galaxies other than the Central Dominant Galaxy |
| 7-Feb-2004 | K4 | Kim | 2.0 | CFHT-IR K$'$-band Imaging Observations of Ultraluminous Infrared Galaxies and Field QSOs. | ||
| 9-Feb-2004 | C13 | Dawson | 0.3 | Empirical Temperature-Scale Calibration for Low-Mass Stars | ||
| 10-Feb-2004 | F1B | Doressoundiram | OL | 2.0 | Visible-infrared colors of the outer solar system objects | |
| 12-29 Feb 2004 | MegaPrime Queue | 18.0 | ||||
| 2-Mar-2004 | CFHTIR | H46A2 | Sanders | TF | 3.0 | |
| 5-Mar-2004 | C23 | McCall | TF | 3.0 | Probing the Uniformity of the Local Sheet Environment:PULSE | |
| 8-Mar-2004 | LAPOUNE | F20 | Charpinet | PM | 4.0 | Asteroseismology of pulsating subdwarf B stars: A CFHT/WHT campaign with multicolor photometry |
| 12-30 Mar 2004 | MegaPrime Queue | 19.0 | ||||
| 1-Apr-2004 | AOB IR | H59A | Ftaclas | OL | 1.0 | Adaptive Optics Search for Extrasolar Planet Companions Around White Dwarfs |
| 2-Apr-2004 | H52A | Stalder | OL | 2.0 | AO Studies of High z Radio Source Hosts Near Bright Natural Guide Stars | |
| 5-Apr-2004 | Gecko Red + Cafe | C11 | Bohlender | NM | 3.0 | The isotopic helium abundances of the hot field horizontal branch star Feige 86 |
| 9-29 Apr 2004 | MegaPrime Queue | 21.0 | ||||
| 2-May-2004 | CFHTIR | C4 | Willott | OL | 2.0 | The quasar luminosity and black hole mass functions at z=6 from the CFHTLS |
| 4-May-2004 | T2 | Kwok | OL | 2.0 | Imaging of Molecular Hydrogen Emission in Planetary Nebulae | |
| 8-13 May 2004 | MegaPrime Queue | 6.0 | ||||
| 14-May-2004 | MOS | C17 | Hanes | DW | 5.0 | Globular Clusters as Dynamical Probes of the Dark Halos of Early-Type Galaxies: Omnipresent or Not? |
| 19-26 May 2004 | MegaPrime Queue | 8.0 | ||||
| 27-May-2004 | CFHTIR | C18 | Yee | TF | 3.0 | Deep Imaging of High-z Galaxy Clusters with Submm Sources |
| 30-May-2004 | F13 | Bouvier | TF | 4.0 | Near-infrared imaging of optically selected brown dwarf candidates in pre-main sequence clusters | |
| 3-Jun-2004 | K1 | Sohn | OL | 1.5 | Near-Infrared Census of Metal Poor Globular Clsuters in the Galactic Bulge | |
| 5-Jun-2004 | F1A | Doressoundiram | OL | 2.0 | Visible-infrared colors of the outer solar system objects | |
| 9-25 Jun 2004 | MegaPrime Queue | 17.0 | ||||
| 26-Jun-2004 | AOB IR | F16 | Lagrange | OL | 4.0 | Investigating low-mass companions around early type stars |
| 1-Jul-2004 | AOB GRiF | F6 | Forveille | TF | 2.0 | The small scale structure of the Helix nebula (NGC~7293) |
| 3-Jul-2004 | F12 | Cl\'enet | TF | 3.0 | Spectro-imagerie de la r\'egion du centre galactique : recherche d'images d\'edoubl\'ees par lentille gravitationnelle et analyse spectrale de la population stellaire d'\'etoiles massives. | |
| 8-23 Jul 2004 | MegaPrime Queue | 16.0 | ||||
| 24-Jul-2004 | Espadons | NM/RC | 5.0 | Science Verification | ||
| 29-Jul-2004 | Gecko Red + Cafe | F3 | GERBALDI | NM | 3.0 | Probing time dependant diffusion in A-type stars members of open clusters |