P&O Ferries is offering a 25% discount to passengers who travel between 6pm in the evening and 6am in the morning in May or June.
The offer is for anyone taking a holiday of more than five nights away.
Passengers must book before June 15 and travel between May 1 and June 30.
Terms and conditions apply as certain vehicle types and durations may be exempt.
Prices between Dover and Calais for a long break start from £39 each way.















