Parents visiting this summer?

First month on New Year is almost over. Before we know summer will be here too. Usually summer is preferable time for parent’s visit to USA.
Are your parents planning to visit you this summer? When? Which airline?
We are encouraging our parents to come in April. Jeegar’s parents are planning to be here in June. It would be good to know if some other parents have tentative or confirmed plans. That way if possible parents can coordinate to fly together. Could synchronize timeframe of their stay so that can enjoy some company around when we go off to work during weekdays.