Are Airlines Stocks Cruising Smoothly or Hurtling to Earth?

Tickers in this article: ALK DAL HA JBLU LUV SAVE UAL

NEW YORK ( TheStreet) - I don't ever remember airline stocks as momentum plays, but the seven we profile today are flying at elevated altitudes. Five are achieving parabolic orbits that will be difficult to sustain.

Lately it seems like airline stocks have been headed for the stratosphere, but they will likely return to "cruising altitude" -- their 200-day simple moving averages -- at some point this year.

We crunched the numbers to help you decide if and when to invest. Here are the profiles for seven airlines, and our two "Crunching the Numbers" tables follow.

Alaska Air ($90.81) is up 23.8% year-to-date, but is down 5.4% since setting a parabolic all-time intraday high at $95.98 on April 2. An early warning is that the stock is below its 21-day simple moving average at $91.67. The 200-day simple moving average is at $71.21.

The weekly chart is positive but overbought, with its five-week MMA at $88.20. This parabolic began in December 2009, when the stock moved above its 200-week SMA, now at $43.53. Quarterly and semiannual value levels are $86.98 and $71.68, with a monthly pivot at $92.91 and this week's risky level at $99.23.

Delta Airlines ($33.51) is up 22% year-to-date, but is down 8.2% since setting a parabolic all-time intraday high at $36.52 on April 2. An early warning is that the stock is below its 21-day SMA at $34.21. The 200-day SMA is at $26.58.

The weekly chart is neutral, with its five-week MMA at $33.15. This parabolic began in December 2012 when the stock moved above its 200-week SMA now at $14.44. A quarterly value level is $31.77, with weekly and monthly risky levels at $35.30 and $36.39.

Hawaiian Air ($13.22) is up 37.3% year-to-date, but is down 10.4% since setting a parabolic all-time intraday high at $14.75 on April 2. An early warning is that the stock is below its 21-day SMA at $13.89. The 200-day SMA is at $9.10.

The weekly chart is positive but overbought, with its five-week MMA at $12.80. This parabolic began in July 2013, when the stock moved above its 200-week SMA now at $6.61. Monthly and quarterly value levels are $12.71 and $11.56, with this week's risky level at $15.52.

JetBlue Airlines ($8.75) is up just 2.5% year-to-date, and is down 7.4% since setting its 2014 intraday high at $9.45 on Jan. 22. This airline is cruising above its 21-day and 50-day SMAs at $8.71 and $8.72, with its 200-day SMA at $7.70.

The weekly chart is neutral, with its five-week MMA at $8.70. Semiannual value levels are $7.89 and $7.39, with a quarterly pivot at $8.80 and monthly risky level at $9.53.

Southwest Air ($23.51) is up 24.8% year-to-date, but is down 3.8% since setting a parabolic all-time intraday high at $24.45 on April 2. An early warning is that the stock is below its 21-day SMA at $23.67. The 200-day SMA is at $17.65.