Russia has threatened to destroy any fighter jets given to Ukraine by its allies, after two countries promised planes.
Slovakia became the second Nato country to pledge Kyiv some MiG-29 aircraft on Friday, a day after Poland.
Slovakia's fleet was grounded last year and it no longer uses the jets.
Ukraine has asked Western countries for modern jets, but because of long training times, these are seen only as long-term options.
It sees extra aircraft as important for its defences and possible counter-attacks, a year into Russia's invasion. วิธีเล่นบาคาร่า