Newcastle face Preston North End, Bradford City and FSV Mainz 05 later this month, and all supporters will be able to buy tickets from 10am on Wednesday.
For Preston and Bradford, there will be a maximum of four tickets per booking while for Mainz, fans will be limited to one ticket per person.
Newcastle visit Preston on Saturday, 22nd July (kick-off 3pm BST). Tickets cost £10 for adults, £5 for 11-21-year-olds and 65+, and £1 for ages 0-10 (must be accompanied by a full-paying adult - not available online). Juniors under 14 must also be accompanied by an adult.
Rafa Benítez's side then head to Bradford on Wednesday, 26th July for a 7.30pm BST kick-off.
Prices are £10 for adults and £5 for juniors (under 16) and seniors (over 60). Juniors under the age of 16 must be accompanied by an adult.
Next up is the fixture at Mainz's Opel Arena on Saturday, 29th July (kick-off 4pm local time).
Newcastle have been allocated more than 1,500 tickets. All seating tickets are £13 while standing tickets are £9.
To secure your seat, please visit tickets.nufc.co.uk, call 0844 372 1892 (calls cost 7p per minute plus your network access charge) or visit the St. James’ Park Box Office in person.
Supporters can see a full list of United’s pre-season fixtures here.
Friday's game against Hearts is now sold out while next month's game against VfL Wolfsburg went on sale on Tuesday afternoon.