Contradiction with John 4:4
John 4:4 indicates that Jesus "must needs go through Samaria," which could be seen as a contradiction to the convenience implied in the proximity of Bethany to Jerusalem mentioned in John 11:18.
John 4:4: And he must needs go through Samaria.
Contradiction with Luke 9:51-53
Jesus is determined to go to Jerusalem, but in John 11:18, the focus is on the proximity of Bethany to Jerusalem rather than a direct journey.
Luke 9:51-53: And it came to pass, when the time was come that he should be received up, he stedfastly set his face to go to Jerusalem,