night that's typically less busy than others can lead to cheaper rates, Gill says. "For many city hotels, this is generally Sunday night," she says. "Given that hotel rates these days are generally based on demand, prices will be lower if the hotel isn't as busy. Every hotel is different; if you want to check, don't be afraid to give the hotel a call and ask." 10 Download an app Hotels.com spokeswoman Katherine Birch says downloading a hotel website or booking company's app enables travellers to book on the go and access last-minute deals. "Our app has 20,000 last-minute hotel deals on offer at any one time so for travellers who are flexible, last-minute deals can offer unbelievable savings."