You may not think that airlines are doing well right now, considering the recent bankruptcy of American Airlines (PINK:AAMRQ) and the rising cost of jet fuel. However a small group of carriers – mostly regional shuttles or emerging market plays but a few of the major U.S. airlines, too –  are flying high right now.

I watch more than 5,000 publicly traded companies with my Portfolio Grader tool, ranking companies by a number of fundamental and quantitative measures. And this week, I have five airline stocks for you to buy.

Here they are, in alphabetical order. Each one of these stocks gets an “A” or “B” according to my research, meaning it is a “strong buy” or “buy.”

China Southern Airlines (NYSE:ZNH) provides passenger transportation, freight business, mail transportation and other services. In the last 12 months, ZNH stock has gained 5%. ZNH stock gets an “A” grade for sales growth, an “A” grade for operating margin growth, an “A” grade for cash flow, and an “A” grade for return on equity. For more information, view my complete analysis of ZNH stock.

Delta (NYSE:DAL) is one of the major American airlines. DAL stock has also posted a gain of 5% since last April. Delta stock gets a “B” grade for operating margin growth, an “A” grade for earnings growth, an “A” grade for earnings momentum, a “B” grade for its ability to exceed the consensus earnings estimate on Wall Street, and an “A” grade for cash flow. For more information, view my complete analysis of DAL stock.

LAN (NYSE:LFL) is a Chilean airline that has posted a gain of 25% since the start of 2012. LFL stock gets an “A” grade for sales growth, an “A” grade for cash flow, and an “A” grade for return on equity in my Portfolio Grader tool. For more information, view my complete analysis of LFL stock.

Ryanair (NASDAQ:RYAAY) operates a low-fares, scheduled-passenger airline in the U.K. and Central Europe. In the last three months, Ryanair stock has jumped 33%. RYAAY stock gets a “B” grade for operating margin growth, a “B” grade for the magnitude in which earnings projections have increased over the past months, a “B” grade for cash flow, and a “B: grade for return on equity in my Portfolio Grader tool. For more information, view my complete analysis of RYAAY stock.

United Continental (NYSE:UAL) is another major American airline that has posted a gain of 17% in the last 12 months. United Continental stock gets an “A” grade for operating margin growth, an “A” grade for its ability to exceed the consensus earnings estimate on Wall Street, an “A” grade for cash flow, and an “A” grade for return on equity. For more information, view my complete analysis of UAL stock.