The travel voucher scheme aims to get travellers to stay in their destinations longer, giving a boost to local economies.

The scheme featured two types of vouchers: a $100 voucher for accommodation providers in Adelaide's CBD, and a $50 voucher for regional and suburban stays.

People could access one of each voucher for free.

Unlike the first round, these vouchers were open to all Australians, and not just South Aussies looking to explore their backyard.

While many people experienced technical difficulties trying to register for a voucher, the 70,000-plus vouchers were allocated within 40 minutes of registrations opening.

Premier Steven Marshall hoped this round would build on the success of the first round.

"The first round of vouchers injected $10 million into our state's economy, with the tens of thousands of discounted room night bookings giving people more time and more money to spend on experiences like the Naracoorte Caves, Granite Island Tram or the Adelaide Zoo," he said.

"With an additional round expanded to include interstate travellers, who we know spend more than intrastate, as well as the peak summer holiday period and events like the Santos Festival of Cycling and WOMADelaide, this stimulus comes at exactly the right time to further bolster tourism businesses and create jobs."

To make use of the vouchers, trips must be booked between January 7 and 31, for travel from January 7 to March 31 inclusive (excluding Saturday nights).

If you got to the 'verification loading' screen, you were in the queue. If it kept loading, this means you did not reach the front of the queue before all vouchers were allocated and you missed out. If you got a notification saying 'you've already registered', you were likely successful - and if you were, you will receive confirmation via SMS and email. If you are unsure, send any screenshots and your details to response@sa.gov.au