Spirit Airlines (Nasdaq: SAVE) is expected to report Q3 earnings around Oct. 30. Here's what Wall Street wants to see:

The 10-second takeaway
 Comparing the upcoming quarter to the prior-year quarter, average analyst estimates predict Spirit Airlines's revenues will increase 18.5% and EPS will wither -10.3%.

The average estimate for revenue is $342.2 million. On the bottom line, the average EPS estimate is $0.35.

Revenue details
 Last quarter, Spirit Airlines booked revenue of $346.3 million. GAAP reported sales were 26% higher than the prior-year quarter's $275.9 million.

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

EPS details
 Last quarter, non-GAAP EPS came in at $0.49. GAAP EPS of $0.48 for Q2 were 17% higher than the prior-year quarter's $0.41 per share.

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

Recent performance
 For the preceding quarter, gross margin was 30.1%, 350 basis points better than the prior-year quarter. Operating margin was 15.9%, 240 basis points better than the prior-year quarter. Net margin was 10.0%, 390 basis points better than the prior-year quarter.

Looking ahead

The full year's average estimate for revenue is $1.34 billion. The average EPS estimate is $1.60.

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 $29.44.