Spirit Airlines (Nasdaq: SAVE) reported earnings on Oct. 31. Here are the numbers you need to know.

The 10-second takeaway
 For the quarter ended Sep. 30 (Q3), Spirit Airlines met expectations on revenues and met expectations on earnings per share.

Compared to the prior-year quarter, revenue expanded significantly and GAAP earnings per share increased.

Margins shrank across the board.

Revenue details
 Spirit Airlines reported revenue of $342.3 million. The six analysts polled by S&P Capital IQ looked for sales of $341.8 million on the same basis. GAAP reported sales were 19% higher than the prior-year quarter's $288.7 million.

Source: S&P Capital IQ. Quarterly periods. Dollar amounts in millions. Non-GAAP figures may vary to maintain comparability with estimates.

EPS details
 EPS came in at $0.35. The 10 earnings estimates compiled by S&P Capital IQ predicted $0.35 per share. GAAP EPS of $0.43 for Q3 were 13% higher than the prior-year quarter's $0.38 per share.

Source: S&P Capital IQ. Quarterly periods. Non-GAAP figures may vary to maintain comparability with estimates.

Margin details
 For the quarter, gross margin was 27.8%, 100 basis points worse than the prior-year quarter. Operating margin was 12.1%, 330 basis points worse than the prior-year quarter. Net margin was 9.0%, 60 basis points worse than the prior-year quarter.

Looking ahead
 Next quarter's average estimate for revenue is $352.9 million. On the bottom line, the average EPS estimate is $0.43.

Next year's average estimate for revenue is $1.34 billion. The average EPS estimate is $1.59.

Investor sentiment
 The stock has a two-star rating (out of five) at Motley Fool CAPS, with 87 members out of 109 rating the stock outperform, and 22 members rating it underperform. Among 32 CAPS All-Star picks (recommendations by the highest-ranked CAPS members), 24 give Spirit Airlines a green thumbs-up, and eight give it a red thumbs-down.

Of Wall Street recommendations tracked by S&P Capital IQ, the average opinion on Spirit Airlines is outperform, with an average price target of $28.25.