Contradiction with Matthew 10:23
Matthew 10:23 talks about fleeing persecution in one city and continuing the mission in another, whereas Luke 21:21 calls for immediate escape to the mountains in response to a specific event.
Matthew 10:23: But when they persecute you in this city, flee ye into another: for verily I say unto you, Ye shall not have gone over the cities of Israel, till the Son of man be come. [have...: or, end, or, finish]
Contradiction with Mark 13:14
Mark 13:14 similarly advises fleeing to the mountains, but it's part of a broader eschatological discourse, potentially contradicting the context and immediacy specific to Luke 21:21.
Mark 13:14: But when ye shall see the abomination of desolation, spoken of by Daniel the prophet, standing where it ought not, (let him that readeth understand,) then let them that be in Judaea flee to the mountains:
Contradiction with Revelation 3:10
Revelation 3:10 offers protection from the hour of trial, suggesting divine safeguarding rather than an immediate physical escape as recommended in Luke 21:21.
Revelation 3:10: Because thou hast kept the word of my patience, I also will keep thee from the hour of temptation, which shall come upon all the world, to try them that dwell upon the earth.