Upgrading to Delta Premium Select is generally considered "worth it" for long-haul international flights in 2026, especially if the price difference over Main Cabin is between $300 and $500. Unlike "Delta Comfort+," which is simply an economy seat with extra legroom, Premium Select is a distinct cabin featuring a wider, "domestic first-class" style seat with a deeper recline and a dedicated footrest. The "soft product" has also been elevated, including plated meals served on real tableware, TUMI amenity kits, and noise-canceling headphones. If you are a traveler who struggles to sleep in a standard upright position, the added recline and leg support make a measurable difference in arriving well-rested. However, for a shorter flight or if the upgrade cost approaches the price of a "Delta One" lie-flat bed, the value proposition diminishes significantly.