Yes in today's demand vs supply world, especially for the better candidates. Nine years ago only the top few got 3-4 offers. Many didn't even get 2 offers. Now guys that wouldn't have been hired several years ago are getting multiple offers.

As others have mentioned if "not #1" hires you first go there. If a higher choice has you scheduled for class date shortly afterwards try and push the first start date back. If you get to "not #1" and a company higher on your list hires you keep moving up your list until the difference is meaningless.

The longer you're at any airline the more value your current job has. Eg a year ago you were considering AA vs UA. Make AA #1 and UA #2. UA hires you? Go. But a year later you have 2000+ guys behind you at UA and another 2000+ ahead of you at AA. Is AA still better than UA when you'll retire hundreds or perhaps 1000+ numbers more junior? Too many variables that only you can answer.