Old Dominion Freight Line, Inc. reported revenue results for the month and year to date ended May 2021. For the month, the company's revenue per day increased 47.6% as compared to May 2020 due to a 28.3% increase in LTL tons per day and an increase in LTL revenue per hundredweight. For the year to date period, LTL revenue per hundredweight and LTL revenue per hundredweight, excluding fuel surcharges, increased 15.3% and 11.1%, respectively, as compared to the same period last year.