Juneyao Airlines typically offers Business and Economy cabins (with First or Premium Economy on some widebody/long-haul routes). Cabins differ notably in seating, catering, baggage allowance and mileage accrual.
For short routes economy is usually the best value; on overnight or long-haul flights Business meaningfully improves rest. Watch for upgrade offers with miles or cash around check-in time.
Product-wise: Juneyao Airlines is Shanghai’s private full-service carrier, flying 787s on intercontinental routes (Helsinki, Athens) alongside a dense Shanghai-based domestic network. As a Star Alliance Connecting Partner, select alliance benefits apply — often at fares below the Big Three.