Brian Dykes
Executive Vice President and Chief Financial Officer at United Parcel Service
Thank you, Carol, and good morning, everyone. This morning, I will cover our third quarter results, review our capital allocation for the year, and then I'll wrap up by providing additional detail for our fourth quarter and full year financial outlook.
Starting with our results. In the third quarter, we returned to revenue and profit growth the first time in two years. Looking at our consolidated performance, in the third quarter, we generated $22.2 billion in revenue, an increase of 5.6% compared to the third quarter of last year, with all three of our business segments delivering revenue growth. Consolidated operating profit was $2 billion, an increase of 22.8% versus the third quarter of 2023 and consolidated operating margin was 8.9%, an increase of 120 basis points compared to the third quarter of last year. Diluted earnings per share was $1.76, up 12.1% from the third quarter of 2023.
Now, let's look at our business segments. In the US Domestic segment, our performance in the third quarter was driven by two factors. First was strong volume growth, the highest growth rate we've seen in more than three years, and second was excellent cost management, which resulted in a year-over-year decrease in cost per piece of 4.1%. US average daily volume or ADV increased 6.5% compared to the third quarter of 2023. Looking at product mix in the third quarter, ground average daily volume increased 8.9%, while total air average daily volume was down 6.3%.
We continue to see customers shifting down from air to ground and some ground volume is shifting down to share post. Within ground, SurePost volume levels rose slightly compared to the second quarter, driven by growth in our digital access program. While SurePost volume comes at a lower revenue per piece, given the enhancements we've made to our matching algorithm, we were able to redirect more SurePost packages into our network driving delivery density.
For the quarter, B2B average daily volume was up 0.8% year-over-year, increasing for the first time in two years. Growth was driven by SMBs, which had an increase in B2B average daily volume of 3.8%. B2C average daily volume increased 11% year-over-year and made up 58.3% of our volume, a slight downward shift from the second quarter.
In terms of customer mix, we saw ADV growth from both enterprise and SMB customers. SMBs made up 29.4% of total US volume in the third quarter. For the quarter, US domestic generated revenue of $14.5 billion, up 5.8% compared to last year, driven by strong volume growth. As expected, US Domestic revenue per piece was down year-over-year. In the third quarter, revenue per piece declined 2.2% year-over-year, but showed a 40-basis point sequential improvement from the second quarter.
Breaking down the components, first, we took actions to address revenue quality, which translated into higher base rate. In the quarter, base rates increased the revenue per piece growth rate by 170 basis points. Second, the combination of product mix, lighter weights and shorter zones decreased the revenue per piece growth rate by 300 basis points. And finally, we experienced a 90-basis point decline in the revenue per piece growth rate due to the combination of changes in customer mix and fuel.
Turning to costs. As you will recall, the cost of our new labor contract was front-end loaded. As of the end of July, we lapped the first year of the contract and for the quarter, union wage rate growth slowed to 5.2% year-over-year. Productivity is a virtuous cycle at UPS and in the third quarter, we took several actions to drive productivity.
Through our Network of the Future initiative, this year, we've completed 45 operational closures, contributing to an 8% improvement in pieces per workforce hour. While 8% might not seem like a big number, that translated into an efficiency gain of 11 million hours. Production improvements, including total service plan, offset 50% of the union wage increase and we continued to see positive trends in our safety performance, which contributed to lower expense.
The US Domestic segment delivered $974 million in operating profit, a 46.5% increase compared to the third quarter of 2023, and the operating margin was 6.7%, a year-over-year increase of 180 basis points.
Moving to our International segment. In the third quarter, our international business grew revenue and operating profit and expanded operating margin for the first time in nearly three years. This performance was driven by strength in exports in 13 of our top 20 export countries. Total international average daily volume growth continued its sequential improvement trend from the second quarter and was about flat to last year.
In the third quarter, international revenue was $4.4 billion, up 3.4% from last year, with all regions growing revenue year-over-year. International revenue per piece increased 2.5%, driven by strong base pricing and the positive impact of region and product mix.
Touching on costs, total international expense was relatively flat year-over-year, which was achieved by optimizing our network and our ongoing cost management efforts. Operating profit in the International segment was $792 million, an increase of 17.3% year-over-year. Operating margin in the third quarter was 18%, an increase of 220 basis points from a year ago.
Moving to Supply Chain Solutions. In the third quarter, revenue was $3.4 billion, up 8% year-over-year. Looking at the key drivers, air and ocean forwarding revenue was up 15.1%, driven by strong market demand out of Asia. Logistics delivered revenue growth driven primarily by the impact of the MNX acquisition and onboarding of USPS air cargo contributed to revenue growth in SCS. Partially offsetting these gains was weaker performance at Coyote, our truckload brokerage business and the completion of the sale in mid-September.
In the third quarter, Supply Chain Solutions generated operating profit of $217 million, down $58 million year-over-year, primarily driven by our efforts to configure our air network as we onboarded the USPS air cargo business. Now that we have fully onboarded this volume, we expect it to generate consistent revenue and we expect an attractive margin on a consolidated basis. For SCS, operating margin in the third quarter was 6.4%.
Walking through the rest of the income statement, we had $230 million of interest expense, our other pension income was $68 million and our effective tax rate for the third quarter was approximately 21%.
Now, let's turn to cash and capital allocation. So far this year, we've generated $6.8 billion in cash from operations and free cash flow of $4 billion, including our annual pension contribution of $1.4 billion. We refinanced $1.5 billion in current maturities year-to-date and we finished the quarter with strong liquidity and no outstanding commercial paper. So far this year, UPS has paid $4 billion in dividends. And lastly, we've completed our targeted $500 million share repurchase program in the third quarter, which brings us to our outlook.
In July, we provided an update to our full year financial targets based on global economic forecast and our performance in the first half of the year. Now, looking ahead at the full year, we have updated our outlook to reflect three things. First, our third quarter results and the focus on revenue quality; second, the sale of Coyote; and finally, new softer peak volume forecast from our customers. At the consolidated level, we now expect full year revenue of approximately $91.1 billion. Due to our focus on revenue quality, coupled with the efficiency of our integrated network and our ability to manage costs, we are lifting our consolidated operating margin expectation to approximately 9.6% to align with these new volume and revenue expectations.
Now, looking at the segments in the fourth quarter. Starting with US Domestic, we expect the combination of both volume and revenue per piece growth to increase revenue by 1.5% in the fourth quarter. We expect to generate a fourth quarter operating margin of approximately 9.5%, and we now expect the operating margin in December to be slightly higher than 10%.
Looking at International, we expect the positive volume momentum we've experienced throughout the year will continue. With that in mind, we expect fourth quarter revenue growth to be up mid-single digits year-over-year and we still expect around a 20% operating margin in the fourth quarter.
In Supply Chain Solutions, we expect revenue in the fourth quarter of around $3.3 billion, which takes into consideration the disposition of Coyote and we expect to generate an operating margin of approximately 9%.
Turning to capital allocation. For the full year in 2024, we expect free cash flow to be around $5.1 billion after the $1.4 billion pension contribution we made to fund annual service costs. Capital expenditures are expected to be about $4 billion. We plan to pay around $5.4 billion in dividends subject to Board approval. And lastly, we expect the tax rate for the full year to be between 23% and 23.5%.
With that, operator, please open the lines for questions.