United and Lufthansa have round-trip flights from Houston (IAH) to Mykonos (JMK) for $617-$664 with a connection. Flights in October, April, and May. Departures on Monday, Wednesday, Thursday, Saturday, and Sunday. 8-day minimum stay required. Requires an overnight stop in Munich or Frankfurt on the return segment.
Some small OTAs on Skyscanner have this for cheaper than the airline, about $592. If you plan on booking there, beware of any site that charges a fee to cancel a ticket within the 24-hour “free” period. Use unknown booking sites at your own risk.

