Two-day strike by ground crew became the reason for four international carriers to cancel or to divert all their flights to and from Budapest Friday.
The striking workers are seeking a 10-percent salary increase.
The strike, which began at 2:30 p.m. (1230GMT) Thursday, could affect a total of some 160 flights over Easter weekend, Szollar said earlier.
Flights operated by the affected airlines represent about one-third of all air traffic at the airport.
Szollar said passengers will also notice a slowdown at check-in counters, baggage claims and when boarding aircraft.
British Airways said some flights would be diverted to the Austrian capital, Vienna, with passengers bussed to and from Budapest - about a three-hour journey.
"We should use shock therapy to sober up the Americans. In this case, the Americans will speak about the need to resume dialogue. There is no other option"
The United States is concerned about the current crisis in the relations with Russia and suggests returning to reasonable policies to avoid a nuclear war