The impact of a strike by Lufthansa crew members was still being felt after the industrial action ended, with as many as 20 flights cancelled at Munich airport on Saturday, a spokesman for Germany's second-largest airport said.
Many flights run by the German airline were experiencing delays of several hours.
Lufthansa had said that its services may still be affected even after the two-day strike ended at midnight (2300 GMT Friday) because planes and staff were not at the correct locations.
Frankfurt Airport was expecting a busier Saturday than usual as many passengers had rebooked flights cancelled on Thursday and Friday, airport operator Fraport said.
Spokespeople for Dusseldorf and Cologne/Bonn airports said that services were completely back to normal on Saturday.
The 48-hour walk-out forced the airline to cancel 1,500 flights, affecting a total of 200,000 people.
The Ufo union, which called the strike in a dispute over pay and conditions for 21,000 cabin staff, is to hold talks with Lufthansa over the weekend as the airline seeks to prevent further industrial action.
Talks are to begin on Sunday at an undisclosed location.
Ufo spokesman Nicoley Baublies sounded an optimistic note, but said that if no solution was reached the union would on Monday call for further strikes.
A decision will be announced by the union on Monday with Lufthansa's four German subsidiaries - Germanwings, Eurowings Germany, Lufthansa City Line and SunExpress Germany - at risk of seeing strike action.
So far only the core Lufthansa brand has been affected.
Ufo cabin personnel stopped work on Thursday to try to force Lufthansa to pay higher expenses and allowances as well as make other work improvements.
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