Interrail has launched a flash sale where travellers can get half-price unlimited travel passes for trains across Europe.

The flash sale begins this morning (Friday, May 6) and lasts until 11.59pm on Tuesday, May 10, but digital passes bought now can be used at any time in the next 11 months.

These 'Continuous Passes' allow unlimited travel for one, two or three months on the national railways of 33 participating countries.

The original one-month pass costs €335 (£279) with the offer, less than £10 per day.

Rates for longer trips are even better as a two-month ticket is €366 (£304), while three months costs €451 (£375), which is less than £5 per day.

No age limits apply, but people 27 or younger get a further 25% discount, those aged 60-plus save 10% and under-12s travel free.

Interrail passes are also valid on some ferry lines, particularly across the Adriatic between Italy and Greece, though port fees apply.

The Dutch organisation Eurail BV, which runs the scheme, said: “The promotion runs during Europe Day which falls on 9 May, paying tribute to European unity and cultural exchange which have been at the core of the Interrail pass from the very beginning.

It also falls on the 40th anniversary of Interrail pass first beginning.

If you want to make the most of this discount then go the Interrail website here to get the pass.