The goal was to create something that, given my flight numbers, would generate an ICS file that I could import into my calendars. This proved to be more difficult than expected. Or, more accurately, it proved to be more expensive than expected. Turns out that flight information is expensive. This seems very odd, since they want to get that information out there. But, alas, you have to pay for APIs that provide flight information.
So, I'm using Tripit instead. Disappointing.