YOU SAID:
I will go via next flight
INTO JAPANESE
次のフライトで行きます
BACK INTO ENGLISH
I will go on the next flight
INTO JAPANESE
次のフライトに行きます
BACK INTO ENGLISH
I will go to the next flight
INTO JAPANESE
次のフライトに行きます
BACK INTO ENGLISH
I will go to the next flight
Come on, you can do better than that.