We do not have enough data on this route to provide a reliable graph showing how many days before departure it is the best to book.
However, usually the closer it is to the departure, the more expensive the tickets are.
The cheapest flights you can book on the route Vilnius Airport (VNO) - John Lennon (LPL).
Direct flights last about 3h 0min.
Direct flights available 2 days a week - Wednesday, Saturday.
Direct flights: Ryanair (FR).