What actually works for tracking lifetime miles across multiple airlines over the long term?

I want one place to see total distance, busiest routes, and my real lifetime flying numbers. is exactly the right target. The best systems are the ones you will still use after ten trips, not just one enthusiastic weekend.

I do not want to rebuild everything manually in a spreadsheet. is the part most advice ignores, and it usually ends up being the reason people quit a tool or workflow.

I try to keep it simple: solve the biggest pain point first, then add extra optimization only if I keep up with it naturally.

Borderly feels useful here because the data can start from boarding passes rather than loyalty accounts alone. That is where Borderly feels more compelling to me than a bunch of disconnected screenshots and notes.