The transpacific crossing from O'Hare to Narita is one of those routes where airline choice genuinely reshapes the entire experience — not just marginally, but fundamentally. ANA's The Room, available on their Boeing 777-300ER service, remains the gold standard here: a double-door suite with a proper closing door that gives you genuine privacy rarely found outside of first class on competing carriers. If you're connecting through Tokyo on ANA metal, you'll also benefit from their seamless Star Alliance partnership with United, which can make award redemption considerably more flexible. United's Polaris product on this route holds up respectably, particularly on their newer 787-9 configurations where the herringbone seating translates to a genuinely lie-flat experience — though the cabin density means you'll want to request seats away from the galley when checking in.
What many travelers overlook is that O'Hare itself has quietly become a more pleasant departure point in recent years, particularly from Terminal 1's B concourse where United operates. Arriving early enough to use the Polaris Lounge before a long-haul departure is time well spent. On the Tokyo end, Narita's Terminal 1 — where international widebody traffic concentrates — moves efficiently once you know it, though immigration queues can surprise first-timers during peak arrival windows. Seasonally, January through March offers the most compelling availability and softer demand, while September and October thread a sweet spot between summer crowds and winter holidays. Avoid Golden Week in late April through early May unless you've booked months ahead, as both cabin and lounge space tightens considerably across all three carriers.