Four Airline stocks are moving up in their overall rating this week, according to the Portfolio Grader database. Every one of these is graded an “A” (“strong buy”) or “B” overall (“buy”).

US Airways (NYSE:LCC) is progressing from last week’s rating of B (“buy”) as the company improves to an A (“strong buy”) this week. US Airways Group provides air transportation for passengers and cargo. In Portfolio Grader’s specific subcategories of Earnings Growth, Earnings Surprise, Equity, Cash Flow, and Margin Growth, LCC also gets A’s. The stock currently has a trailing PE Ratio of 4.50. For more information, get Portfolio Grader’s complete analysis of LCC stock.

This week, Alaska Air (NYSE:ALK) pushes up from a B to an A rating. Provides passengers air, freight, and mail services primarily to Alaska and other destinations on the West Coast of the United States. For more information, get Portfolio Grader’s complete analysis of ALK stock.

The rating of Allegiant (NASDAQ:ALGT) moves up this week, rising from a B to an A. Allegiant Travel is a travel company focused on transporting travelers in small cities to popular leisure destinations. Shares of ALGT have increased 6.4% over the past month, better than the 2.3% increase the Nasdaq has seen over the same period of time. For more information, get Portfolio Grader’s complete analysis of ALGT stock.

Southwest Airline (NYSE:LUV) ups its rating to a B (“buy”) this week after earning a C (“hold”) in the week before. Southwest Airlines is a passenger airline operating in the United States. Wall Street seems to agree with the upgrade and has propelled the stock up 5.1% over the past month. For more information, get Portfolio Grader’s complete analysis of LUV stock.

Louis Navellier’s proprietary Portfolio Grader stock ranking system assesses roughly 5,000 companies every week based on a number of fundamental and quantitative measures. Stocks are given a letter grade based on their results — with A being “strong buy,” and F being “strong sell.” Explore the tool here.