Ewout Steenbergen
Executive Vice President and Chief Financial Officer at Booking
Thank you, Glenn and good afternoon. I'm very excited to join the Booking Holdings team. I look forward to continuing to work with you and David in his new role and the rest of the leadership team to help drive continued future success for our investors, employees, traveler customers and supplier partners.
I will now review our results for the first quarter and provide our thoughts for the second quarter. All growth rates are on a year-over-year basis. Information regarding reconciliation of non-GAAP results to GAAP results can be found on our earnings release. We'll post our prepared remarks to the Booking Holdings investor relations website after the conclusion of the earnings call. Now let's move to the first quarter results.
Our Room nights in the first quarter grew 9%, which exceeded the high end of our guidance by about 3 percentage points,
The higher than expected room night growth was driven by a continued expansion of the booking window, as well as healthy underlying demand with better-than-expected performance in Europe and less of a negative impact from the war in the Middle East than expected.
Looking at our room night growth by region, in the first quarter, Asia was up mid teens, Europe and the rest of the world were up high single digits and US was up low single digit. We're encouraged by the continued progress we are making in strengthening the direct relationships with our travelers.
Over the last four quarters, the mix of our total room nights coming to us through the direct channel was in the mid 50% range and when we exclude our B2B business was in the low 60% range. We have seen both these mixes increase year-over-year in each of those four quarters. We're focused on continuing to increase our direct mix going forward, which we believe will benefit from our efforts to improve the experience for our travelers, including building towards our connected trip vision.
Increasing our direct mix benefits our P&L by driving higher efficiency of our marketing spend as a percentage of growth bookings, while reducing the mix of bookings resourced through paid marketing channels. In our mobile apps, the significant majority of bookings we receive are direct and we continue to see favorable repeat direct booking behavior from consumers in our mobile apps when compared to direct bookings on desktop or mobile web. The mobile apps also allow us more opportunities to engage directly with consumers.
In the first quarter, mobile app mix of about 51% was 5 percentage points higher than the first quarter of 2023. We continue to offer our travelers a broad selection of places to stay and are seeing an increasing mix of our room nights being booked in alternative accommodation properties. For our alternative accommodations at Booking.com, our first quarter room night growth was 13% and the global mix of alternative accommodation room nights was 36%, which was up versus 33% in the first quarter of 2023.
Outside of accommodations, we saw airline tickets booked on our platforms in the first quarter increased 33%, driven by the continued growth of Booking.com's flight offering. First quarter growth bookings increased 10%, which exceeded our expectations. The 10% increase in growth bookings was approximately 2 percentage points higher than the 9% room night growth on an unrounded basis due to about 1% higher accommodation ADRs, plus about one point of positive impact from flight bookings. There was an immaterial impact from changes in FX on our gross bookings growth rate.
Our ADR growth was negatively impacted by regional mix due to a higher mix of room nights from Asia. Excluding regional mix, ADRs were up about 2 percentage points. Similar to comments we have made in the past, we have not seen a change in the mix of hotel star rating levels being booked or changes in the length of stay that could indicate that consumers are trading down. We continue to watch these dynamics closely.
Revenue for the first quarter of $4.4 billion also exceeded our expectations, increasing 17% year-over-year. Revenue as a percentage of gross bookings was 10.1% and improved versus the first quarter of 2023, due mostly to the Easter timing shift, as well as the easier year-on-year take rate compare due to changes in the booking window last year, as mentioned on our first quarter 2023 earnings call. Marketing expense, which is a highly variable expense line increased 6% year over year.
Marketing expense as a percentage of growth bookings was 3.7%, about 15 basis points lower than the first quarter of 2023 due to higher ROIs in our paid channels and a higher mix of direct business. Performance marketing ROIs increased year-over-year helped by our ongoing efforts to improve the efficiency of our marketing spend.
First quarter sales and other expenses as a percentage of gross bookings was 1.6%, about 20 basis points higher than last year, due in large part to a higher merchant mix. Our more fixed expenses on an adjusted basis were up a 11%, which was below our expectation, due primarily to lower G&A expense. We recognize that this fixed expense growth is elevated as we invest in the business, but are fully focused on driving operating leverage from our more fixed expenses and targeting a much lower opex growth level in 2025.
Adjusted EBITDA of approximately $900 million was above our expectations, largely driven by stronger than expected bookings, as well as better than expected marketing efficiency. Adjusted EBITDA was up 53%, including about 20 percentage points of benefit from the shift in easter timing. Note that we expect the first quarter will be our seasonally lowest EBITDA quarter for the year. Adjusted net income of over $700 million resulted in adjusted EPS of $20.39 per share, which was up 76%. Our average share count in the first quarter was 9% below the first quarter of 2023. On a GAAP basis, we had net income of $776 million in the quarter.
Now onto our cash and liquidity position. Our first quarter ending cash and investments balance of $16.4 billion was up versus our fourth quarter ending balance of $13.1 billion, due to the $3 billion debt issuance in the first quarter and $2.6
Billion in free cash flow generated in the first quarter. This was partially offset by the $1.9 billion in capital return, including share repurchases and the dividend we initiated in the quarter, as well as $350 million in additional share repurchases to satisfy employee withholding tax obligations.
Now on to our thoughts for the second quarter. We expect second quarter room night growth to be between 4% and 6%, a deceleration from the fourth quarter, as the first quarter benefited more from the year-over-year expansion of the booking window. We expect the booking window to be closer to the prior year in the second quarter. Additionally, the impact from the ongoing war in the Middle East was less negative than we expected in the first quarter. However, we expect a more negative impact in the second quarter, given the geopolitical situation in April.
April room night growth rate was above the high end of that range and benefited by a couple points from Easter being in March this year versus April last year. Adjusting for Easter, April room night growth was about in line with the high end of that range.
We expect second quarter growth bookings growth to be between 3% and 5%, slightly below room night growth due to about 3 points of negative impact from changes in FX, offset by about 1% higher constant currency accommodation ADRs, plus about 1 point of positive impact from flight bookings. We expect second quarter revenue growth to be between 4% and 6% and for revenue growth to be impacted by about 2 points of negative impact from changes in FX.
Adjusted for the changes in FX, we expect second quarter revenue growth to be in line with second quarter growth bookings growth, as the negative impact from the shift in Easter timing is offset by increasing revenues associated with payments. We expect marketing to be a source of slight deleverage in the quarter, but if you adjust for Easter timing, we expect marketing as a percentage of revenue to be neutral year-over-year. We expect our sales and other expenses to grow faster than revenue in the second quarter, driven by a higher merchant mix.
We expect our more fixed opex to grow faster than revenue in the second quarter due primarily to faster IT expense growth, as we have been investing in new tech platforms and in line with the full year guidance we provided last quarter. We expect second quarter adjusted EBITDA to be between about $1.7 billion and $1.75 billion, down low single digits year-over-year due to about 7 points of pressure from the shift in Easter timing and about 2 points of negative impact on growth from changes in FX. Normalizing for Easter timing and changes in FX, our expectation for second quarter adjusted EBITDA would be for mid to high single digit growth.
In closing, we are pleased with our first quarter results and the healthy leisure demand environment we are seeing. In terms of our outlook for the full year, we're not updating our previous full year commentary at this time. We want to see how the next few months develop before considering any updated commentary. We continue to expect 2024 to be a strong year for the company.
Lastly, I would like to thank all my new colleagues across the company for their hard work and dedication to make these strong first quarter results possible and thank you for your continued commitment towards our shared vision of making it easier for everyone to experience the world.
We'll now move to Q&A and Kathleen, will you please open the lines?