List of Thor and Delta launches (2020–2024)

The final half-decade of launches in the Thor/Delta family consisted of one Delta IV Heavy each year from 2020 through 2024. This followed the retirement of Delta II in 2018 and single-stick (non-Heavy) variants of the Delta IV in 2019. With the start of 2024, Vulcan Centaur took its first flight in time to maintain continuity of ULA's service in the heavy-lift launch vehicle market before the Delta IV Heavy program came to an end three months later on April 9, 2024.

Launch history
{| class="wikitable plainrowheaders" style="width: 100%;"


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2020
! scope="col" | Flight No. ! scope="col" | Date / time (UTC) ! scope="col" | Rocket, Configuration ! scope="col" | Launch site ! scope="col" | Payload ! scope="col" | Payload mass ! scope="col" | Orbit ! scope="col" | Customer ! scope="col" | Launch outcome

! scope="row" rowspan = 2 style="text-align:center;"| 385
 * 11 December 2020 01:09
 * Delta IV Heavy
 * CCSFS, SLC-37B
 * USA-311 (NROL-44)
 * Classified
 * GSO
 * US NRO
 * Success
 * colspan="8" | Reconnaissance satellite, likely an Orion satellite. Launch attempts on 29 August and 30 September were aborted due to problems with the Ground Service Equipment (GSE). The rocket finally lifted off on 11 December.
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2021
! scope="col" | Flight No. ! scope="col" | Date / time (UTC) ! scope="col" | Rocket, Configuration ! scope="col" | Launch site ! scope="col" | Payload ! scope="col" | Payload mass ! scope="col" | Orbit ! scope="col" | Customer ! scope="col" | Launch outcome

! scope="row" rowspan = 2 style="text-align:center;"| 386
 * 26 April 2021 20:47
 * Delta IV Heavy
 * VAFB, SLC-6
 * USA-314 (NROL-82)
 * Classified
 * LEO
 * US NRO
 * Success
 * colspan="8" | Reconnaissance satellite, likely a KH-11 Kennen satellite.
 * colspan="9" style="background:white;" |
 * colspan="9" style="background:white;" |
 * colspan="9" style="background:white;" |

2022
! scope="col" | Flight No. ! scope="col" | Date / time (UTC) ! scope="col" | Rocket, Configuration ! scope="col" | Launch site ! scope="col" | Payload ! scope="col" | Payload mass ! scope="col" | Orbit ! scope="col" | Customer ! scope="col" | Launch outcome ! scope="row" rowspan = 2 style="text-align:center;"| 387
 * 24 September 2022 22:25:30
 * Delta IV Heavy
 * VAFB, SLC-6
 * NROL-91
 * Classified
 * LEO
 * US NRO
 * Success
 * colspan="8" | Reconnaissance satellite, likely a KH-11 Kennen satellite. Final Delta flight from Vandenberg.
 * colspan=9 style="background:white;" |
 * colspan=9 style="background:white;" |
 * colspan=9 style="background:white;" |

2023
! scope="col" | Flight No. ! scope="col" | Date / time (UTC) ! scope="col" | Rocket, Configuration ! scope="col" | Launch site ! scope="col" | Payload ! scope="col" | Payload mass ! scope="col" | Orbit ! scope="col" | Customer ! scope="col" | Launch outcome ! scope="row" rowspan = 2 style="text-align:center;"| 388
 * 22 June 2023 09:18
 * Delta IV Heavy
 * CCSFS, SLC-37B
 * NROL-68
 * Classified
 * GEO
 * US NRO
 * Success
 * colspan="8" | Reconnaissance satellite, likely an Orion satellite.
 * colspan=9 style="background:white;" |
 * colspan=9 style="background:white;" |
 * colspan=9 style="background:white;" |

2024
! scope="col" | Flight No. ! scope="col" | Date / time (UTC) ! scope="col" | Rocket, Configuration ! scope="col" | Launch site ! scope="col" | Payload ! scope="col" | Payload mass ! scope="col" | Orbit ! scope="col" | Customer ! scope="col" | Launch outcome

! scope="row" rowspan = 2 style="text-align:center;"| 389
 * 9 April 2024 16:53
 * Delta IV Heavy
 * CCSFS, SLC-37B
 * NROL-70
 * Classified
 * GEO
 * US NRO
 * Success
 * colspan="8" | Reconnaissance satellite, likely an Orion satellite. Final flight of the Delta rocket family.
 * colspan="8" | Reconnaissance satellite, likely an Orion satellite. Final flight of the Delta rocket family.


 * }