Northern will put over one million train tickets on sale for £1 today.
The rail operator's flash sale will start at 10am. Bargain tickets for travel between Tuesday September 6 and Thursday October 20 will go on sale, although the cheapest fares will not always be available for popular routes.
Northern says the sale is a chance for passengers to enjoy breaks for less after the summer holidays. Its network includes Newcastle, Manchester, Leeds, York, Lincoln and the Lake District, as well as the Tyne Valley Line in the North East and Cumbria. The sale travel period starts next week and ends just before the October half-term holidays.