Delta Air Lines: As of 2021[update], "reconfirmation" is mentioned in their Contracts of carriage.[11] American Airlines: As of 2021[update], "reconfirmation" is mentioned in their Contracts of carriage.[12] Lufthansa: As of 2021[update], Lufthansa flights do not need reconfirmation.[13][14] United Airlines: As of 2021[update], "reconfirmation" is mentioned in their Contracts of carriage.[15] Airlines which explicitly mandate reconfirmation: Ethiopian Airlines,[16] Kenya Airways[17]