The grades of 3 Airlines stocks are better this week, according to the Portfolio Grader database. Every one of these stocks has an “A” (“strong buy”) or “B” overall (“buy”) rating.

Ryanair Holdings Plc Sponsored ADR (RYAAY) improves from a B to a A rating this week. Ryanair Holdings Plc Sponsored ADR provides low fare passenger airline services to destinations in Europe. The company also gets A’s in operating margin growth, earnings growth, earnings momentum, and return on equity. For more information, get Portfolio Grader’s complete analysis of RYAAY stock.

The rating of Delta Air Lines, Inc. (DAL) moves up this week, rising from a C to a B. Delta Air Lines, Inc. operates as an airline for passengers and cargo traveling throughout the United States and around the world. The company also gets A’s in operating margin growth, return on equity, and free cash flow. For more information, get Portfolio Grader’s complete analysis of DAL stock.

SkyWest, Inc (SKYW) gets a higher grade this week, advancing from a B last week to a A. SkyWest, Inc offers scheduled passenger air travel. The company also gets A’s in operating margin growth, earnings growth, earnings revisions, and earnings surprise. For more information, get Portfolio Grader’s complete analysis of SKYW 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.