SpaceX delays Starship Flight 12: New liftoff time set

SpaceX has delayed the debut launch of its upgraded Starship Flight 12 by one day, shifting liftoff to a new evening target window from its Starbase site in South Texas.

Launch slips a day, but evening window remains

Public launch-tracking data and recent coverage indicate that Starship Flight 12, the first mission for SpaceX’s redesigned Starship Version 3, is now targeting liftoff on Wednesday, May 20, 2026, rather than the previously expected May 19 date.

The mission is set to launch on a suborbital trajectory from the Starbase complex near Boca Chica, Texas. The move represents the latest in a series of incremental schedule adjustments during the final days of preparation for the powerful methane-fueled rocket system.

Despite the one-day delay, the basic timing of the attempt has not changed. Multiple independent launch calendars list the new target as 10:30 p.m. UTC, which corresponds to 5:30 p.m. Central Time at the launch site, keeping Starship’s twelfth test firmly in an evening launch window.

The adjustment follows a pattern familiar in orbital and deep-space launches, in which technical checkouts, regulatory coordination, and last-minute pad work can nudge scheduled attempts by hours or days without altering broader mission objectives.

New liftoff time: 5:30 p.m. Central on May 20

According to publicly accessible launch schedules that aggregate regulatory notices, tracking data, and company updates, SpaceX is now aiming for a liftoff time of 10:30 p.m. Coordinated Universal Time for Flight 12. For viewers in South Texas and across the U.S. central states, that translates to 5:30 p.m. Central Time on Wednesday.

The evening timing offers a relatively favorable viewing opportunity along the Gulf Coast region, with daylight still present at liftoff but fading during ascent. Starship’s climb to space is expected to be visible across portions of southern Texas and, weather permitting, may produce a bright plume stretching high over the Gulf of Mexico.

Launch windows for Starship are typically structured to balance several factors, including safety corridors over water, propellant-loading timelines, and range availability. The current plan maintains a roughly 90-minute window beginning at 10:30 p.m. UTC, giving teams flexibility to address minor issues during the countdown while still preserving a same-day launch opportunity.

Streaming coverage is expected to begin roughly half an hour before liftoff, aligning with patterns seen on earlier Starship tests. Viewers can anticipate the familiar milestones of propellant loading, final checkouts, and the last-minute hold points that mark the tense run-up to ignition.

What the delay suggests about Starship V3 readiness

The one-day slip highlights the cautious approach surrounding the debut of Starship Version 3, a significantly revised iteration of the two-stage launch system. Public information on the vehicle indicates that both the Super Heavy booster and the Starship upper stage carry extensive hardware and software changes compared with earlier flights.

These upgrades include a new generation of Raptor engines, structural and tank refinements, and modifications to the heat shield system. The redesigned launch pad, referred to as Launch Pad 2 at Starbase, is also entering service for the first time on this mission, adding further complexity to the preflight campaign.

Reports on recent dress rehearsals describe full-scale fueling tests with more than 5,000 metric tons of liquid oxygen and liquid methane loaded into the stacked rocket. The successful completion of those operations signaled that both ground systems and vehicle plumbing can support the extreme cryogenic conditions required for launch, even as teams continue to fine-tune procedures.

In this context, a 24-hour adjustment is broadly consistent with the methodical testing cadence seen across previous Starship campaigns. Each shift provides extra time to review data from pad runs, refine software, and verify that the new infrastructure at Starbase is performing as designed before committing to engine ignition.

Mission profile for Flight 12

Flight 12 is expected to follow a suborbital path, with the primary goal of testing Starship V3 in a real flight environment rather than reaching a stable orbit. Publicly available mission descriptions indicate that the Super Heavy booster will loft Starship off the pad and then follow a downrange trajectory over the Gulf, without attempting a return to the launch site.

The upper-stage Starship will conduct a series of maneuvers intended to evaluate performance of the upgraded propulsion, guidance, and thermal-protection systems. Plans call for the deployment of a cluster of non-operational Starlink simulator payloads, designed to mimic the mass and behavior of next-generation satellites without adding new spacecraft to orbit.

Another key objective is to test engine restarts and controlled reentry under the higher-performance conditions introduced with Version 3. The vehicle is not expected to be recovered, but surviving key phases of descent would mark a major step toward fully reusable operations in future missions.

Data from Flight 12 will feed directly into subsequent launches, including potential cargo and crewed missions under NASA’s Artemis program later in the decade. The outcome will be closely watched by space agencies, commercial customers, and competitors evaluating heavy-lift capabilities for deep-space exploration.

How to follow Wednesday’s launch attempt

For those planning to follow events from afar, the critical numbers are the new date and time: Wednesday, May 20, 2026, at 5:30 p.m. Central Time, within a broader early-evening launch window. Observers near the Texas Gulf Coast may seek vantage points that provide clear views to the southeast, while paying close attention to local safety advisories and temporary road or beach closures.

Online coverage is expected to feature real-time commentary, countdown graphics, and telemetry readouts, similar to previous Starship broadcasts. Enthusiast communities are maintaining their own trackers and discussion threads, often incorporating details from airspace and maritime notices that highlight the expected flight corridor over the Gulf.

As with any test flight of a new launch vehicle configuration, the schedule remains subject to change right up to the final minutes before liftoff. Weather, technical findings, or range coordination can still prompt further holds or scrubs. For now, however, the latest information points to a slightly delayed but still imminent debut for Starship Flight 12 as the world’s most powerful rocket readies for its next trial by fire.