Prices of all weekday off-peak train journeys in Scotland will be cut in half as the state-owned railway tries to get people back on the tracks.
ScotRail customers can book their discounted tickets between May 9 and 15, with outward travel valid between May 9 and 31, and journeys must be between stations in Scotland to qualify.
The offer will see an off-peak return between Glasgow and Edinburgh cost £9.55 and those wanting to ditch the car and get the train between Inverness and Aberdeen can do it for £23.85 return.
The deal will only be available to purchase online via a dedicated booking link to be published on the ScotRail website and all return travel must be complete by June 30.
Don't miss the latest headlines - sign up to our Glasgow Live newsletters here.
Lesley Kane, ScotRail's commercial director, said the pandemic had "fundamentally changed the way people travel".
"We are launching this fantastic offer because Scotland's railway is yours to use," she said.
"We hope this offer means more people can get out and enjoy Scotland throughout the month of May, whether for a day-out or a holiday."
As part of the deal, ScotRail's Kids for a Quid can be used in conjunction with the offer, which means up to four children can travel, for £1 return each, with each adult.
Since 2012, Scottish peak and off-peak regulated fares have increased by 38%, research by the RMT union found in January, while the price of petrol had increased by less than 10%.
The promotion, which ScotRail said was originally set to take place in January but was postponed due to soaring Omicron cases, comes just days after UK Government Transport Secretary Grant Shapps announced the Great British Rail Sale.
In the sale, tickets are being slashed by as much as half, with seats on some London to Edinburgh services cut from £44 to £22.
The Department for Transport is hoping the Great British Rail Sale will help hard-pressed households, facing rising bills and soaring inflation, to afford trips across the UK and boost domestic tourism.
