Daniel Wełna had the following podium finishes at the Flatwater World Championships: 1st 1977 K4 500 m (with Ryszard Oborski, Grzegorz Kołtan, and Henryk Budzicz), 1st 1977 K4 1000 m (with Henryk Budzicz, Grzegorz Kołtan, and Ryszard Oborski), 2nd 1979 K4 1000 m (with Grzegorz Kołtan, Ryszard Oborski, and Grzegorz Śledziewski, 2nd 1981 K2 500 (with Waldemar Merk), 3rd 1978 K4 500 m (with Henryk Budzicz, Grzegorz Kołtan, and Ryszard Oborski), 3rd 1979 K4 500 m (with Grzegorz Kołtan, Ryszard Oborski, and Grzegorz Śledziewski, 3rd 1981 K2 1000 (with Waldemar Merk).