Miami to Jacksonville How much cost a flight

Miami to Jacksonville How much cost a flight?
I need to know how much could cost me a flight From JAcksonville to MIami (Florida). I have to go to Miami once per month. Thank you!
Air Travel - 4 Answers
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1 :
http://www.orbitz.com/App/ViewFlightSearchResults?retrieveParams=true&z=c08c&r=2d&z=c08d&r=2e&lastPage=interstitial That's one way though!
2 :
About $140 round trip all taxes and fees included with a two week advance purchase.
3 :
It depends on your travel dates. For cheaper flights, try flying on Tuesdays, Wednesdays, Thursdays, and Saturdays. Avoid Monday, Sunday, and Friday. For cheap tickets, try: Hotwire.com Expedia.com Travelocity.com Southwest.com (JAX to Ft. Lauderdale) Priceline.com Bing.com/travel Have a great trip!
4 :
Depending on how much time you have, there's also Amtrak...trip takes about 9 hours but cost is just over $50 each way (and if they get the go-ahead for a new Jax-Mia route down the old ACL lines, would likely trim at least a couple hours off.)