You likely won't have choices if you want to fly DL and arrive in the morning. There are no flights from ICN (Delta's main Asia hub which has some evening flights from US) to OKA and all the Delta US-HND flights depart in the morning/noon timeframe and arrive in HND afternoon. If you are mostly looking at avoiding early morning departures, you can book evening departure and have an overnight connection at a DL hub (fares to long-haul international destinations allow connections up to 24 hours). But the hotel cost will be at your own expense.