Mobile bookings made on Christmas Day were up 176% year-on-year and 206% year-on-year for Boxing Day bookings.
The firm saw mobile traffic and use of its mobile app jump on Christmas Day and Boxing Day and over these days traffic was up 44% on last year.
The newly developed Android app is now available to download with the new iOS app due to be launched in early 2017.
Monarch also claimed its decision to scrap credit card fees had been welcomed by customers.
Rob Foulkes, senior marketing and digital manager at Monarch, said: “Mobile conversion rate was significantly up year-on-year on both Christmas Day and Boxing Day.
“Removing barriers like credit card fees has had a very positive impact on sales over the festive period and customers now feel more confident booking on their mobile than ever before.
“Customers are nearly three times as likely to book on mobile compared to last year with transactions up almost 300%.
“With the combination of the cold weather and factors such as the 0% fees, newly developed apps and our huge seat sale our mobile conversion rates have improved, resulting in bookings being significantly ahead of last year over Christmas Day and Boxing Day.”
Monarch's mobile transactions rise 300%
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