Exhibit 99.1

Saia Reports Record Second Quarter Results

JOHNS CREEK, GA – July 29, 2021 – Saia, Inc. (Nasdaq: SAIA), a leading transportation provider offering national less-than-truckload (LTL), non-asset truckload, expedited and logistics services, today reported second quarter 2021 financial results.  Diluted earnings per share in the quarter were $2.34 compared to $1.07 in the second quarter of 2020.

Highlights from the second quarter operating results were as follows:

Second Quarter 2021 Compared to Second Quarter 2020 Results

“It is great to report record second quarter results only about a year removed from the onset of the COVID-19 pandemic,” stated Saia President and CEO, Fritz Holzgrefe.  “Our operating ratio of 85.5% in the quarter is the best OR  for any quarter in our history.  We had a very good quarter in terms of service and our cargo claims ratio of 0.54% is also a record,” added Holzgrefe.  “Shipper demand remains strong early in the third quarter and we continue to hire drivers and dockworkers across all areas of our service map,” said Holzgrefe.

“We were pleased to announce the opening of our Hagerstown, Maryland terminal in June and we expect to open additional terminals during the second half of the year.  We continue to maintain and operate one of the cleanest diesel fleets in the industry.  During the quarter, we commenced pilot programs using alternative fuel tractors by adding two all-electric tractors and five compressed natural gas (CNG) tractors,” concluded Holzgrefe.

Saia Executive Vice President and Chief Financial Officer, Douglas Col added, “Total shipments in  the second quarter were an all-time quarterly high and we are working hard to accommodate our customers’ needs in an environment where we are experiencing a very tight labor market.”  “With rising operational costs, we focused more than ever on the profitability of the added volumes and our 10.5% increase in yield pushed our revenue per shipment to a record $277, up nearly 18% over last year,” said Col.

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Financial Position and Capital Expenditures

Total debt was $61.0 million at June 30, 2021 and inclusive of the cash on-hand, net debt to total capital was 0.8%.  This compares to total debt of $160.8 million and net debt to total capital of 13.1% at June 30, 2020.

Net capital investments were $100.0 million in the first half of 2021.  This compares to $142.7 million in net capital investments during the first half of 2020.  In 2021, we anticipate net capital expenditures will be approximately $275 million.

Conference Call

Management will hold a conference call to discuss quarterly results today at 10:00 a.m. Eastern Time. To participate in the call, please dial 877-886-2341 or 334-777-6979 referencing conference ID #9556386. Callers should dial in five to ten minutes in advance of the conference call. This call will be webcast live via the Company website at https://www.saia.com/about-us/investor-relations/financial-releases. A replay of the call will be offered two hours after the completion of the call through August 26, 2021 at 1:00 p.m. Eastern Time. The replay will be available by dialing 888-203-1112.

Saia, Inc. (SAIA) offers customers a wide range of less-than-truckload, non-asset truckload, expedited and logistics services.  With headquarters in Georgia, Saia LTL Freight operates 171 terminals with service across 44 states.  For more information on Saia, Inc. visit the Investor Relations section at www.saia.com/about-us/investor-relations.

Cautionary Note Regarding Forward-Looking Statements

The Securities and Exchange Commission encourages companies to disclose forward-looking information so that investors can better understand the future prospects of a company and make informed investment decisions. This news release may contain these types of statements, which are “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995.

Words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “may,” “plan,” “predict,” “believe,” “should” and similar words or expressions are intended to identify forward-looking statements. Investors should not place undue reliance on forward-looking statements and the Company undertakes no obligation to publicly update or revise any forward-looking statements. All forward-looking statements reflect the present expectation of future events of our management as of the date of this news release and are subject to a number of important factors, risks, uncertainties and assumptions that could cause actual results to differ materially from those described in any forward-looking statements. These factors, risks, uncertainties and assumptions include, but are not limited to, (1) general economic conditions including downturns or inflationary periods in the business cycle; (2) operation within a highly competitive industry and the adverse impact from downward pricing pressures, including in connection with fuel surcharges, and other factors; (3) industry-wide external factors largely out of our control; (4) cost and availability of qualified drivers, purchased transportation and fuel; (5) claims expenses and other expense volatility, including for personal injury, cargo loss and damage, workers’ compensation, employment and group health plan claims; (6) cost and availability of insurance coverage, including the possibility the Company

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may be required to pay additional premiums, assume additional liability under its auto liability policy or be unable to obtain insurance coverage; (7) failure to successfully execute the strategy to expand our service geography; (8) costs and liabilities from the disruption in or failure of our technology or equipment essential to our operations, including as a result of cyber incidents, security breaches, malware or ransomware attacks; (9) failure to keep pace with technological developments; (10) labor relations, including the adverse impact should a portion of our workforce become unionized; (11) cost and availability of real property and revenue equipment; (12) capacity and highway infrastructure constraints; (13) risks arising from international business operations and relationships; (14) seasonal factors, harsh weather and disasters caused by climate change; (15) economic declines in the geographic regions or industries in which our customers operate; (16) the creditworthiness of our customers and their ability to pay for services; (17) our need for capital and uncertainty of the credit markets; (18) the possibility of defaults under our debt agreements (including violation of financial covenants); (19) failure to operate and grow acquired businesses in a manner that support the value allocated to acquired businesses; (20) dependence on key employees; (21) increased costs of healthcare benefits; (22) damage to our reputation from adverse publicity, including from the use of or impact from social media; (23) failure to make future acquisitions or to achieve acquisition synergies; (24) the effect of litigation and class action lawsuits arising from the operation of our business, including the possibility of claims or judgments in excess of our insurance coverages or that result in increases in the cost of insurance coverage or that preclude us from obtaining adequate insurance coverage in the future; (25) the potential of higher corporate taxes and new regulations, including with respect to climate change, employment and labor law, healthcare and securities regulation; (26) the effect of governmental regulations, including hours of service for drivers, engine emissions, the Compliance, Safety, Accountability (CSA) initiative, regulations of the Food and Drug Administration and Homeland Security, and healthcare and environmental regulations; (27) unforeseen costs from new and existing data privacy laws; (28) changes in accounting and financial standards or practices; (29) widespread outbreak of an illness or any other communicable disease, including the COVID-19 pandemic, or any other health crisis or business disruptions that may arise from the COVID-19 pandemic in the future; (30) increasing investor and customer sensitivity to social and sustainability issues, including climate change; (31) anti-terrorism measures and terrorist events; (32)  provisions in our governing documents and Delaware law that may have anti-takeover effects; (33) issuances of equity that would dilute stock ownership; and (34) other financial, operational and legal risks and uncertainties detailed from time to time in the Company’s SEC filings.

As a result of these and other factors, no assurance can be given as to our future results and achievements. Accordingly, a forward-looking statement is neither a prediction nor a guarantee of future events or circumstances and those future events or circumstances may not occur. You should not place undue reliance on the forward-looking statements, which speak only as of the date of this news release. We are under no obligation, and we expressly disclaim any obligation, to update or alter any forward-looking statements, whether as a result of new information, future events or otherwise, except as otherwise required by law.

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CONTACT:Saia, Inc.

Investor Relations

investors@saia.com

770.232.4088