Qatar has hot and arid climate, with maximum heat experienced in summers. To avoid climatic extremities, the best time to visit Qatar is between November and early April.
Advance booking is the best way to get cheap flight to Doha. Book 3 to 6 week in advance to grab cheap flights. Airlines such as Qatar Airways, Gulf Air, United Airlines offers great discounts on airline tickets. There is an excellent public transport service in Doha known as Mowasalat, with "Karwa" taxis available in all parts of Doha.