 | This timeline of spaceflight may require cleanup to ensure consistency with other timeline of spaceflight articles. See Wikipedia:WikiProject Spaceflight/Timeline of spaceflight working group for guidelines on how to improve the article. Details |  |
 | |
| Orbital launches | |
|---|---|
| First | 11 January |
| Last | 26 December |
| Total | 54 |
| Successes | 50 |
| Failures | 1 |
| Partial failures | 3 |
| Catalogued | 53 |
| Rockets | |
| Maiden flights | Ariane 5G+ Delta IV Heavy Soyuz-2.1a (suborbital) |
| Retirements | Ariane 5G+ Atlas IIAS Atlas IIIA Atlas V 521 |
| Crewed flights | |
| Orbital | 2 |
| Suborbital | 3 |
| Total travellers | 8 |
This article outlines notable events occurring in 2004 in spaceflight, including major launches and EVAs.