I check everything and everywhere I can when I am looking for flights for trips. This is my first JA trip but I've Greece twice, Germany, Mexico City, Dublin and a number of States trips recently. I have found the best deals in different places every time. For this JA trip we used Expedia because with the hotel, the trip was only $50 more than just the flight alone on the airline's website for the exact same flight! Just be diligent about checking once or twice a day, delete cookies, check from different computers, etc.