When Is The Best Time To Book A Flight 2025. The average price shows that wednesday is the cheapest day to book a flight: Here are the results of the jetcost search on when to book a flight in the uk in 2025:

For international flights, booking around three to six months in advance is. Choosing the right day to book a flight can save people close to 25 per cent, with trips being even cheaper if you pick the right day to depart.