If it seems to you like everyone is experiencing flight cancellations this summer, you're not alone. My in-laws, cousins, and some friends all had flights cancelled on them within the last week, and though my flight wasn't cancelled, flying to San Francisco was a total nightmare. Due to staffing cuts at both airlines and airports, and more Americans feeling comfortable traveling during the pandemic, airports are a shitshow. And they're not getting any better. We need to travel smart. And that's…