David Bowers, originally from Bradford but now living in Melbourne, posted a photo to Facebook claiming that if he got one million likes, his wife would let him travel to London to see the match between Bradford and Swansea City on February 24.
At the time of writing, Bowers has picked up more than 400,000 likes.
Bowers wrote: "I have been a City fan for as long as I can remember, please help me get to Wembley just like our awesome Bradford City!!!!
"This is not about getting to Wembley to see Bradford City win, but more for the fact that in years to come I will be able to look back and say I was there when Bradford went to a cup final."
Bradford sealed their place in the final after scalps against Wigan Athletic, Arsenal and Aston Villa.