3 Airlines 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”).

Alaska Air Group, Inc. (ALK) improves from a B to a A rating this week. Alaska Air Group, Inc. is an airline holding company which provides air service to passengers in multiple destinations. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and return on equity. For more information, get Portfolio Grader’s complete analysis of ALK stock.

This week, American Airlines Group, Inc.’s (AAL) ratings are up from a C last week to a B. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of AAL stock.

This week, Southwest Airlines Co. (LUV) pushes up from a C to a B rating. Southwest Airlines Co. is a passenger airline operating in the United States. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and return on equity. 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.