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.
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