William Heyburn
Analyst · Oppenheimer
Thank you, Rob. I'll now walk through a few financial highlights from the quarter.
Starting with Medical, we're benefiting both from solid industry fundamentals and our strategy to establish and refine the most cost-effective and reliable end-to-end organ logistics platform in the United States. Nationwide heart, liver and lung organ transplants rose approximately 9% year-over-year in the first quarter of 2024. Blade's growth, both in terms of trip volumes and in terms of revenues, continues to exceed that market growth given new client additions and strong trip growth within our existing client base.
We continue to see growth related to our clients' use of multiple new perfusion and organ preservation technologies, which have expanded the transport market by enabling organs to travel over longer distances and by increasing the pool of viable organs for transplantation.
Market growth in company initiatives are evident in the commercial momentum we're seeing in the business. Medical segment revenue rose 34.6% year-over-year in the first quarter to $36 million, and rose 12.6% sequentially versus Q4 2023. New clients represented approximately half of the growth in the quarter, and we continue to drive strong revenue growth with our existing clients.
We're pleased with the sales pipeline and expect to onboard several new clients, both for logistics and for TOPS, our organ matching service, over the coming quarters.
We also wanted to highlight how our ground strategy is allowing us to build a deeper, more integrated and more cost-effective relationship with our clients. Blade now directly operates more than 30 medical vehicles, with many more available through our growing network of third-party drivers, all deployed in our densest markets. Ground represented more than 10% of Medical revenue this quarter, at above average margins, and it grew more than 70% versus the prior year.
Several factors are contributing to improved profitability in the Medical segment. Our increased use of dedicated aircraft and ground vehicles provides a mutual benefit to our clients and Blade. We also continue to see an increase in average trip distance, which all translates into improved profitability metrics within our Medical business.
Medical flight profit rose 84.5% year-over-year to $8 million in Q1 2024. Medical flight margin increased 6 points to 22.3% in the quarter versus the comparable period last year and 2 points versus Q4 2023. Medical segment adjusted EBITDA rose 134.5% year-over-year to $4.4 million in Q1 2024, as margins rose over 500 basis points to 12.2%.
Going forward in Medical, we expect to average single-digit sequential quarter-over-quarter revenue growth for the remainder of the year. As always, the timing of new client onboarding and other factors influences sequential growth rate in any quarter and can result in some quarter-to-quarter lumpiness. Our next quarter ending June 30, 2024, is a particularly tough year-over-year comp given our support of a large hospital on a temporary basis during the 2023 period, which we have discussed on our prior earnings calls.
For medical SG&A, we continue to expect single-digit sequential quarter-over-quarter growth for the remainder of the year as we ramp up our organ placement and ground offerings. As Rob mentioned, we closed on 7 of the 8 previously announced aircraft acquisitions. While these closings happened after quarter end, we're pleased with the free cash flow benefits we've seen in these early days, and we look forward to providing a more thorough update once we close on all the aircraft and have accumulated more operating data.
Turning to the Passenger business, in short distance, 26% growth in airport this quarter was more than offset by poor flying weather for European ski routes and lower passenger volume in Canada, leading to a 5.9% revenue decrease year-over-year. In Europe, where travel to and from the Alps is the primary driver in the first quarter, weather-related cancellations approximately doubled compared with last year.
In Jet and Other, revenues decreased 29.7% year-over-year driven by our decision to discontinue BladeOne at the end of the 2023 winter season, which had generated losses and $2.9 million of revenue in Q1 2023. Excluding BladeOne, Jet and Other revenue rose 9.4% year-over-year, driven by increased jet charter activity and growing brand partner revenues. Q2 will be our last quarter for this BladeOne revenue headwind expected to be in the range of $1 million.
We are delivering on the profitability improvements we promised in Passenger, cutting loss-making products like BladeOne and optimizing the cost structure. Importantly, Passenger segment adjusted EBITDA improved by $0.4 million year-over-year, even in the face of disappointing weather in Europe. Going forward in Passenger, we expect continued year-over-year improvement in Passenger segment adjusted EBITDA, driven by SG&A cost efficiencies.
On the corporate cost side, we once again reduced our adjusted unallocated corporate expenses with a 19% decline in Q1 2024 versus the prior year period. This, combined with our improvement in both Passenger and Medical segment adjusted EBITDA, led to a $4.2 million improvement in adjusted EBITDA versus the prior year period to negative $3.5 million in Q1 2024.
For the remainder of the year, we expect adjusted unallocated corporate expenses to be flat to down.
On the cash flow front, cash from operations was a $15.6 million usage in the quarter. The difference between adjusted EBITDA and cash from operations in the quarter was primarily driven by a $2.6 million increase in accounts receivable and a $10.2 million reduction in accounts payable and accrued expenses, which was driven by cash payments for the Trinity contingent consideration resulting from our acquisition and by our 2023 short-term incentive plan. Please note that this will be the last Trinity contingent consideration payment.
Capital expenditures of $1.1 million were driven primarily by leasehold improvements related to the build-out of larger office space in Tempe, Arizona for our growing medical business, along with investments in software development.
We ended the quarter with no debt and $151 million of cash and short-term investments, providing flexibility for strategic investments, acquisitions and opportunistic share repurchases.
On the guidance front, we are reiterating the 2024 and 2025 guidance we introduced last quarter. Most notably for positive adjusted EBITDA in 2024 and double-digit adjusted EBITDA in 2025, and we believe this quarter's results represent an important first step in achieving those goals.
Last but not least, I'd like to take this opportunity to welcome Mat Schneider to the team as VP of Investor Relations and Strategic Finance. Mat has had a long career spanning sell-side research and public equity investing with a focus on aerospace. We're lucky to have him on board, and I look forward to introducing many of you to him in the coming weeks.
With that, I'll turn it back over to Rob.