Exhibit 99.1

Saia Reports Fourth Quarter and Full Year Results

JOHNS CREEK, GA. – February 2, 2018 – Saia, Inc. (NASDAQ: SAIA), a leading transportation provider offering multi-regional less-than-truckload (LTL), non-asset truckload, expedited and logistics services, today reported fourth quarter and year-end 2017 financial results.

Fourth quarter 2017 diluted earnings per share of $1.82 compares to $0.40 in the fourth quarter of 2016.  For the full year 2017, our diluted earnings per share were $3.49 versus $1.87 in 2016.  During the fourth quarter of 2017, the Company recorded a reduction in deferred income tax liability that was required as a result of the passage of the Tax Cuts and Jobs Act.  Excluding this reduction, diluted earnings per share were $0.53 for the fourth quarter and $2.19 per share for 2017. ¹

Highlights from our fourth quarter and full year operating results were as follows:

Fourth Quarter 2017 Compared to Fourth Quarter 2016 Results

2017 Results Compared to 2016 Results

“Fourth quarter results reflect not only significant growth from our expansion into new markets this past year, but are also indicative of continuing strong freight activity and disciplined pricing.  The two terminals we opened in the fourth quarter bring the 2017 total openings in new markets to six or approximately 4% terminal growth”, said Saia President and Chief Executive Officer, Rick O’Dell.  “Customers have been very responsive to our offering of an expanded service area and freight in and out of new markets in the Northeast in December accounted for 6.8% of daily LTL revenue”, O’Dell continued.

“Our revenue run rate in the Northeast has exceeded our expectations.  We believe both existing and new customers value our broader direct LTL shipping coverage and that this provides a potential future growth opportunity.  We also believe customers value the 98% on-time service standard and .73% cargo claims ratio that we achieved in the fourth quarter.  Our LTL yield increased by 8.7% in the quarter, marking our 30th consecutive quarter of year-over-year improvement”, stated O’Dell.

“In 2018 we plan to open terminals in 4-6 new markets, as we continue to execute on our plan to provide 48-state coverage for our customers over the next few years”, concluded O’Dell.

Financial Position and Capital Expenditures

Total debt was $132.9 million at December 31, 2017 and inclusive of the cash on-hand, net debt to total capital was 18.0%.  This compares to total debt of $73.8 million and net debt to total capital of 13.0% at December 31, 2016.

Net capital expenditures in 2017 were $217.0 million including equipment acquired with capital leases.  This compares to $152.4 million in net capital expenditures in 2016.  In 2018, we anticipate net capital expenditures of approximately $265 million.

Saia, Inc. Fourth Quarter 2017 Results

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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 800-239-9838 or 323-794-2551 referencing conference ID #5145633.  Callers should dial in five to ten minutes in advance of the conference call.  This call will be webcast live via the Company web site at www.saiacorp.com.  A replay of the call will be offered two hours after the completion of the call through March 2, 2018 at 1:00 p.m. Eastern Time.  The replay will be available by dialing 888-203-1112 or 719-457-0820.

Saia, Inc. (NASDAQ: 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 154 terminals in 40 states.  For more information on Saia, Inc. visit the Investor Relations section at www.saiacorp.com.

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 contains 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 in the business cycle; (2) effectiveness of Company-specific performance improvement initiatives, including management of the cost structure to match shifts in customer volume levels; (3) the creditworthiness of our customers and their ability to pay for services; (4) failure to achieve acquisition synergies; (5) failure to operate and grow acquired businesses in a manner that supports the value allocated to these acquired businesses, including their goodwill; (6) economic declines in the geographic regions or industries in which our customers operate; (7) competitive initiatives and pricing pressures, including in connection with fuel surcharge; (8) loss of significant customers; (9) the Company’s need for capital and uncertainty of the credit markets; (10) the possibility of defaults under the Company’s debt agreements (including violation of financial covenants); (11) possible issuance of equity which would dilute stock ownership; (12) integration risks; (13) the effect of litigation including class action lawsuits; (14) cost and availability of qualified drivers, fuel, purchased transportation, real property, revenue equipment and other assets; (15) governmental regulations, including but not limited to Hours of Service, engine emissions, the Compliance, Safety, Accountability (CSA) initiative, compliance with legislation requiring companies to evaluate their internal control over financial reporting, Homeland Security, environmental regulations and the Food and Drug Administration; (16) changes in interpretation of accounting principles; (17) dependence on key employees; (18) inclement weather; (19) labor relations, including the adverse impact should a portion of the Company’s workforce become unionized; (20) terrorism risks; (21) self-insurance claims and other expense volatility; (22) cost and availability of insurance coverage; (23) increased costs of healthcare and prescription drugs, including as a result of healthcare reform legislation; (24) social media risks; (25) cyber security risk;  (26) failure to successfully execute the strategy to expand the Company’s service geography into the Northeastern United States; and (27) other financial, operational and legal risks and uncertainties detailed from time to time in the Company’s SEC filings.  In addition, information regarding the impact of the Tax Act is a preliminary estimate.  This estimate is a forward-looking statement and is subject to change, possibly materially, as the Company completes its financial statements.  Information regarding the impact of the Tax Act is based on the Company’s current calculations, as well as the Company’s current interpretations, assumptions and expectations relating to the Tax Act, which are subject to further guidance and change.  As a result of these and other factors, no assurance can be given as to our future results and achievements.  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.

Saia, Inc. Fourth Quarter 2017 Results

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FOOTNOTE

¹Non-GAAP Financial Disclosure and Reconciliation:

The Tax Cuts and Jobs Act (the “Tax Act”) was enacted on December 22, 2017 and lowers U.S. corporate income tax rates as of January 1, 2018, among other changes.  The estimated impact of the Tax Act was a reduction of deferred income tax liability due to the effects of the remeasurement of deferred tax assets at lower enacted corporate tax rates.  Management believes that presenting the Company’s results excluding the Tax Act is meaningful as excluding this item increases the comparability of period-to-period results.  Diluted earnings per common share excluding the impact of the Tax Act is a non-GAAP financial measure.  Non-GAAP financial measures do not have definitions under GAAP and may be defined differently by and not be comparable to similar non-GAAP measures used by other companies.  The table below presents the calculation of diluted earnings per common share, excluding the impact of the Tax Act:

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