A week ago I wrote about why codeshares are great for airlines, not customers, and why you should almost never book one. There are edge cases, but in general they’re a hassle – whether because you need to get rebooked due to a schedule change or even just have a seat assigned.
What prompted me to write about this is that American Airlines, despite its close alliance with JetBlue in the Northeast, is unable to assign seats on JetBlue flights. American’s workaround wasn’t working, so now there’s a new one.