OK - You did very well in booking directly with LOT. Your travel dates are in Sept/Oct? This far out there is a high chance of schedule change or cancellation which will be a nightmare to deal with if you had booked through an OTA like MyTrip, GoToGate, Bravofly etc which come up as the cheapest options when you search on Momondo. These OTA are to are to be avoided at all costs (you will realise that if you are forced to interact with them e.g. for schedule changes, reebookinhg etc.)