Hello, From my experience, the worth of delta miles value significantly depending on the method and timing of their use. When it comes to booking international flights, I’ve found that the best value particularly for business class is to be had when doing so ahead of time. On domestic flights, the value per mile was slightly reduced, but it remained beneficial during busy travel periods. At times, the miles didn’t reach as far as I had hoped for last-minute trips. However, using Delta miles allowed me to save money and travel in greater comfort.