Frontier (FTR) reported adjusted EBITDA (earnings before interest, tax, depreciation, and amortization) of $908 million in Q1 2018. Adjusted EBITDA exceeded the Wall Street analyst expectations of $900 million. However, adjusted EBITDA numbers fell from both the year-ago quarter and the sequential quarter due to high seasonal costs. Adjusted EBITDA fell ~2.9% year-over-year (or YoY) from $935 million in Q1 2017 and ~1.2% from $919 million in Q4 2017. Moreover, Frontier anticipates adjusted EBITDA in 2018 will come in at approximately $3.6 billion.