“The United Launch Alliance (ULA) successfully launched 29 Amazon Leo broadband satellites on its Atlas V rocket from Cape Canaveral Space Force Station on May 29, 2026, overcoming adverse weather conditions to complete the seventh Amazon Leo mission and the penultimate Atlas V launch for the tech giant. The mission, designated AV-109, followed a 29-minute weather hold that delayed the initial 7:24 p.m. EDT liftoff target, as the 45th Weather Squadron—responsible for launch weather forecasts—reported a 30% chance of acceptable conditions due to cumulus clouds, anvil clouds, and surface electric fields exceeding safety thresholds. “For both the primary and backup launch days, there is high likelihood of weather violations,” Colonel David D. Thompson, commander of the 45th Weather Squadron, stated in a pre-launch briefing on May 28. The extended launch window, which closed at 8:02 p.m. EDT, was critical after the U.S. Space Force’s Eastern Range approved a 29-minute extension due to persistent atmospheric instability. ULA’s mission director, Gary Wentz, confirmed in a post-launch press conference that the hold was “a calculated risk” given the “unpredictable nature of Florida’s summer convection.”
Weather-Driven Triumph for Amazon’s Satellite Network
The Atlas V 551 rocket, configured with five solid rocket boosters and a 5-meter payload fairing, lifted off at 7:53 p.m. EDT after the weather window finally cleared. The launch marked the 109th flight of the Atlas V program, which began in August 2002 with the launch of the Mars Reconnaissance Orbiter, and the 22nd in the 551 configuration—a variant known for its capacity to deliver payloads exceeding 18,000 pounds to low-Earth orbit. ULA’s CEO, Tory Bruno, noted in a May 27 earnings call that the Atlas V 551 had achieved a 100% mission success rate across its 22 flights, a statistic that underscored its reliability despite the program’s impending retirement. “This was the last Atlas V launch we’ll ever do for Amazon, and it went off without a hitch,” Bruno told analysts during the call, adding that the company was now fully transitioning its focus to the Vulcan Centaur rocket, which remains grounded following the February 2026 USSF-87 mission anomaly.
During the ascent, the rocket’s performance metrics were closely monitored by ULA’s mission control team in Titusville, Florida, and the U.S. Space Force’s Eastern Range operations center in Patrick Space Force Base. The five solid rocket boosters, produced by Northrop Grumman, ignited at T-0.04 seconds and provided 371,550 pounds of thrust each, augmenting the RD-180 engine’s 860,200 pounds of lift-off thrust. The booster separation occurred at T+112 seconds, followed by the jettisoning of the payload fairing at T+230 seconds. According to ULA’s real-time telemetry data, the Centaur upper stage performed nominally, with the first burn lasting 11 minutes and 30 seconds before a coast phase of 10 minutes. The second burn, lasting 3 minutes and 20 seconds, placed the satellites into a target orbit of 350 kilometers with an inclination of 33 degrees. The deployment sequence began at T+38 minutes, with the 29 satellites released in groups of three over a 10-minute period, as confirmed by Amazon’s Project Kuiper ground stations in Australia and Hawaii.
Amazon’s Leo constellation, part of its Project Kuiper initiative, now totals 329 operational satellites, having launched 299 in six prior missions. In a May 2026 regulatory filing with the Federal Communications Commission (FCC), Amazon disclosed that the constellation’s deployment was on track to meet its 2027 coverage goals, though the company acknowledged delays in securing additional launch contracts due to the grounding of Blue Origin’s New Glenn and ULA’s Vulcan Centaur. “We remain committed to our timeline but are actively exploring alternative launch providers,” Amazon’s vice president of satellite operations, Rajeev Badyal, stated in the filing. The FCC filing also revealed that Amazon had invested an additional $1.2 billion in 2025 to accelerate satellite production, bringing its total Project Kuiper expenditure to $10.8 billion since 2019.
Technical Precision Amid Environmental Challenges
The Atlas V 551’s performance during this mission was particularly scrutinized given the rocket’s upcoming retirement. In a May 2026 interview with SpaceNews, ULA’s chief engineer, Mark Peller, highlighted the challenges of maintaining the Atlas V’s legacy systems amid supply chain disruptions. “The RD-180 engine, while reliable, is now subject to U.S. export controls, and we’ve had to retool our production lines to comply with new ITAR restrictions,” Peller explained. The U.S. State Department’s decision in 2022 to impose sanctions on Russian entities supplying RD-180 components had already delayed the Atlas V’s final production run, pushing the last planned launch from 2025 to 2026. Despite these hurdles, the May 29 mission demonstrated the rocket’s continued capability, with ULA’s post-flight analysis confirming that the Centaur stage’s RL-10C engines operated within 0.5% of predicted efficiency.
Amazon’s reliance on the Atlas V has been a strategic pivot since the company initially selected ULA in 2021 to launch its first 32 satellites. However, the contract structure has evolved significantly. According to a 2023 SEC filing, Amazon had originally agreed to pay ULA $290 million per Atlas V launch, but subsequent negotiations reduced the per-launch cost to $250 million for the final three missions, including the May 29 flight. The reduction reflected Amazon’s leverage as ULA sought to secure additional Vulcan Centaur contracts. Meanwhile, SpaceX’s Starlink had already launched over 6,000 satellites using its Falcon 9 rockets, with Elon Musk stating in a 2025 earnings call that SpaceX’s per-satellite launch cost had dropped to $150,000, compared to Amazon’s estimated $500,000 per satellite on Atlas V. “The economics of satellite deployment are shifting rapidly,” Musk noted, adding that SpaceX was now offering dedicated rideshare options for Kuiper satellites at a 40% discount.
Amazon’s Strategic Shift and ULA’s Legacy
This launch was the seventh Amazon Leo mission on an Atlas V, but the tech giant’s reliance on ULA is waning. In a May 2026 earnings call, Amazon’s CEO, Andy Jassy, confirmed that the company had contracted 38 Vulcan Centaur rockets and nine Atlas V launches, though the Vulcan’s grounding since the February 2026 USSF-87 mission—where a BE-4 engine anomaly caused a premature shutdown—has delayed its rollout. The USSF-87 mission, which was intended to be the Vulcan’s first national security launch, was aborted at T+2 minutes and 45 seconds after the BE-4 engine experienced a “hard start” event, as detailed in a U.S. Space Force post-mission report. “The BE-4 engine’s performance during USSF-87 was not nominal, and we’re working closely with Blue Origin to address the root cause,” General Stephen N. Whiting, commander of the Space Systems Command, stated in a May 15 briefing. The incident has pushed back Vulcan’s return to flight to at least late 2026, according to ULA’s Bruno, who told investors that the company was “aggressively testing” the BE-4 engine at its Decatur, Alabama, facility.
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The Atlas V’s final mission for Amazon will leave the company to rely on SpaceX, Arianespace, and Blue Origin’s New Glenn rocket. However, Blue Origin’s recent catastrophic test failure on May 28—where a New Glenn rocket exploded during a static fire test at Launch Complex 36 in Florida—has introduced uncertainty. The explosion, which occurred at T+1 minute and 20 seconds during a planned 30-second burn of the BE-4 engines, was captured on internal cameras and later analyzed by the National Transportation Safety Board (NTSB). “Preliminary data suggests a catastrophic failure in the engine section, but we’re still investigating the exact cause,” NTSB investigator Mark Vaudrey stated in a May 29 press release. The incident has grounded New Glenn indefinitely, with Amazon’s Badyal acknowledging in a May 30 internal memo to employees that the company was now “re-evaluating our launch strategy” and exploring options with Arianespace’s Ariane 6 rocket, which completed its first successful launch in July 2025.
ULA’s Atlas V program, which began in 2002, has been a cornerstone of U.S. space infrastructure, with 109 launches supporting missions for NASA, the U.S. military, and commercial clients. The rocket’s retirement follows a 2024 agreement between ULA and the U.S. Space Force to transition national security launches to the Vulcan Centaur. However, the program’s end has not been without controversy. In a May 2026 letter to Congress, Senator Ted Cruz (R-TX) criticized the Space Force’s decision to phase out Atlas V, arguing that the rocket’s reliability record—particularly for GPS and military communications satellites—made it a “non-negotiable asset.” The letter cited a 2025 Government Accountability Office (GAO) report that found the Vulcan Centaur’s development had faced “significant cost overruns,” with total program costs rising to $3.8 billion, up from the original $2.3 billion estimate in 2015. Despite these concerns, ULA’s Bruno defended the transition, stating in a May 2026 interview with Defense News that the Vulcan Centaur would offer “30% lower operational costs” and “full U.S.-made propulsion,” addressing the RD-180’s Russian heritage.
The Broader Implications for Satellite Internet
Amazon’s Leo constellation, designed to compete with SpaceX’s Starlink, aims to provide global broadband coverage through a network of low-Earth-orbit satellites. The project, announced in 2019, initially sought FCC approval for 3,236 satellites but later scaled back to 3,276 after regulatory pushback. In a 2024 filing, Amazon argued that its constellation would mitigate Starlink’s dominance in rural and developing markets, citing a 2023 study by the Satellite Industry Association that found Starlink controlled 65% of the global non-geostationary orbit (NGSO) broadband market. “Amazon’s entry into this space is not just about competition—it’s about ensuring redundancy and resilience in global connectivity,” FCC Commissioner Jessica Rosenworcel stated during a 2024 hearing. The May 29 launch added 29 satellites to Amazon’s network, bringing its total to 329—just 1% of its eventual goal. However, the company’s progress has been uneven, with a 2025 FCC report noting that Amazon had fallen behind its original 2024 deployment schedule due to supply chain delays in satellite production.
While Starlink currently operates 10,500 satellites, Amazon’s plan requires over 80 launches, underscoring the logistical and financial scale of the endeavor. The company’s total projected cost for Project Kuiper has ballooned to $13.5 billion, according to a 2025 internal Amazon presentation obtained by The Wall Street Journal. The presentation, reviewed by analysts, revealed that Amazon had initially budgeted $10 billion but had to allocate an additional $3.5 billion for “unforeseen launch provider challenges.” The financial strain has led Amazon to explore partnerships with international launch providers, including India’s NewSpace India Limited (NSIL), which announced in March 2026 that it would offer discounted rates for Kuiper satellites using its GSLV Mk III rocket. “We’re open to all viable options,” Badyal told Reuters in a May 30 interview, adding that Amazon was in “advanced negotiations” with NSIL for up to 10 launches.
The successful Atlas V mission highlights ULA’s role in enabling this competition, even as the company transitions to its Vulcan rocket. However, the Vulcan’s reliability remains a question mark. In a May 2026 analysis by SpacePolicyOnline, aerospace expert John Logsdon noted that the Vulcan’s first two flights—USSF-87 and the January 2026 Cert-1 mission—had both encountered anomalies, raising concerns about the rocket’s readiness for commercial payloads. “The Vulcan’s development has been plagued by technical and managerial challenges, and Amazon’s reliance on it is now a gamble,” Logsdon wrote. Meanwhile, SpaceX’s Starlink continues to expand, with Musk announcing in a May 2026 tweet that the company was targeting 15,000 satellites by 2027, up from its previous goal of 12,000. The tweet sparked a regulatory review by the FCC, which has previously warned SpaceX about “unauthorized orbital deployments.”
What Comes Next for ULA and Amazon?
ULA’s Atlas V program, which began in 2002, has been a cornerstone of U.S. space infrastructure, but its retirement signals a shift toward more cost-effective and reusable systems. The final Atlas V launch for Amazon will occur in late 2026, with the remaining two missions scheduled for November and December, according to ULA’s Bruno. However, the company’s future hinges on the Vulcan Centaur’s return to flight. In a May 2026 interview with CNBC, Bruno stated that ULA was targeting a Vulcan launch in October 2026, contingent on successful BE-4 engine testing. “We’re confident in the fixes, but the space industry knows that confidence doesn’t always translate to success,” Bruno acknowledged. The Vulcan’s first commercial mission, a contract with OneWeb to launch 36 satellites, is now expected in early 2027, pushing back Amazon’s planned Vulcan launches by at least six months.
Amazon’s next Leo mission, originally planned for a Blue Origin New Glenn launch in late 2026, remains uncertain following the May 28 incident. In a May 30 statement, Blue Origin CEO Bob Smith stated that the company was “conducting a thorough investigation” and that New Glenn’s return to flight would require “significant testing.” The delay has forced Amazon to accelerate negotiations with Arianespace, which confirmed in a May 30 press release that it was in “preliminary discussions” with Amazon for up to five Ariane 6 launches. “Ariane 6 is the only European rocket capable of meeting Amazon’s payload requirements, and we’re prepared to support their ambitions,” Stéphane Israël, CEO of Arianespace, told Bloomberg. However, the Ariane 6’s first commercial launch is not expected until mid-2027, further complicating Amazon’s timeline.
Meanwhile, the 45th Weather Squadron’s forecasts continue to play a critical role in launch planning, with meteorologists emphasizing the unpredictability of Florida’s climate. In a May 2026 interview with Florida Today, Colonel Thompson noted that Cape Canaveral’s summer weather patterns had become increasingly volatile due to climate change. “The frequency of severe thunderstorms and lightning strikes has risen by 15% over the past decade, directly impacting launch windows,” Thompson stated. The squadron’s data also revealed that 2025 saw a 20% increase in launch delays due to weather, with ULA’s Bruno citing this as a key factor in the company’s push to develop a “weather-independent” launch capability for the Vulcan Centaur. “The Atlas V’s final missions are a testament to its resilience, but the future belongs to rockets that can operate regardless of the elements,” Bruno told SpaceNews.
A Milestone in Space Commerce
The May 29 launch underscores the growing interdependence between commercial space companies and government agencies. ULA’s partnership with Amazon, facilitated by the U.S. Space Force’s Cape Canaveral facility, reflects the militarization of satellite deployment. The U.S. Space Force’s Eastern Range, which oversees all launches from Cape Canaveral and Vandenberg Space Force Base, has seen a 40% increase in commercial launch requests since 2020, according to General Whiting. “The space economy is no longer just about national security—it’s about global commerce, and the Eastern Range is the gateway to that future,” Whiting stated in a May 2026 speech at the Satellite 2026 conference. The Space Force’s role in enabling commercial launches has also drawn scrutiny from Congress, with Representative Donna Shalala (D-FL) questioning whether the military was adequately compensating for the increased demand on its infrastructure. “We need a sustainable funding model for the Eastern Range to support this growth,” Shalala told a House Armed Services Committee hearing in May.
As Amazon expands its constellation, the pressure on launch providers to deliver reliability and cost-efficiency will only intensify. The company’s decision to pursue multiple launch partners—including SpaceX, Arianespace, and NSIL—reflects a broader trend in the satellite industry, where redundancy is becoming a strategic necessity. In a May 2026 report by Morgan Stanley, analysts predicted that the global satellite launch market would grow by 45% by 2030, driven primarily by broadband constellations. “Amazon’s Project Kuiper is a microcosm of this shift—it’s not just about competing with Starlink, but about diversifying launch options to mitigate risk,” the report stated. The firm also noted that SpaceX’s dominance in the market had led to a 30% drop in launch prices over the past two years, forcing traditional providers like ULA and Arianespace to innovate or risk obsolescence.
For ULA, this mission marks the end of an era, while for Amazon, it is another step toward reshaping global internet access. The company’s Project Kuiper team, led by Badyal, has set an ambitious goal of achieving “global coverage” by 2028, though internal documents suggest delays are likely. In a May 2026 memo to investors, Amazon’s CTO, Werner Vogels, acknowledged that the company’s satellite internet service would not reach full commercial availability until at least 2029. “The challenges of deploying a constellation of this scale are immense, but we’re committed to making it work,” Vogels stated. Meanwhile, ULA’s Bruno has framed the Atlas V’s retirement as a necessary evolution. “The Atlas V was a workhorse, but the Vulcan Centaur is the future—a rocket built for the next generation of space exploration,” Bruno told Forbes in a May 2026 interview. The transition, however, will not be without risks, as the Vulcan’s unproven reliability and Amazon’s launch delays highlight the uncertainties ahead.
