Finding Inexpensive Airfares: Lowcost.pro Recommendations for Budget Trips from European Cities & Mo

Hi people, I'm an infrequent traveler trying to find out the best time to reserve cheap flights from Helsinki. I've discovered a chart on cheap flights from munich that displays price changes throughout the year, but I'm still a somewhat unsure whether it's better to book way ahead or wait for occasional last-minute deals. Have any of you noticed particular seasonal trends or hidden trends that could help me grab the best fares? Thanks in anticipation for any tips or personal booking stories you can share!