CLOSED:
Fort Lauderdale-Hollywood International, Jacksonville International, Miami International, Orlando International, Palm Beach International, Southwest Florida International and Tampa International are all closed today. Tallahassee International Airport will resume operations later today. Pensacola International Airport posted this:

We've been informed that a few national news and media outlets have reported that ALL Florida airports are currently closed due to Hurricane Irma. This is FALSE. While many southern and eastern Florida airports are closed, Pensacola International Airport is currently open and will remain open as long as Hurricane Irma does not severely impact our area. Passengers with scheduled travel to impacted areas are strongly encouraged to monitor the status of their flight by frequently visiting their airline's website.

From Tweets or website posts:

Fort Lauderdale-Hollywood International Airport says FLL is closed today Monday, September 11. Staff is assessing damages and making necessary repairs. We are working closely with the airlines and our partners to open FLL as soon as we are ready to resume operations.

JAXairport‏ @JAXairport
Once conditions improve, we'll assess any damage. Airport remains closed until we can resume safe operations.

Miami Int'l Airport
Emilio T Gonzalez‏ @emiliotgonzalez
@iflymia will be closed on Monday September 11. 
@iflymia endured #HurricaneIrma gusts of nearly 100 mph. Sustained significant water damage throughout.

Orlando Intl Airport‏ @MCO
Hurricane #Irma Update
No scheduled flights today at MCO & teams standing-by to assess damage. Stay tuned for more updates.

Palm Beach International Airport http://www.pbia.org
All flights in/out of PBI have been cancelled due to Hurricane Irma. PLEASE CONTACT YOUR AIRLINE FOR ADDITIONAL INFORMATION. Do not plan to weather the storm at PBI. PBI is not an authorized storm shelter.

Southwest Florida International http://www.flylcpa.com/
If you are traveling Sept. 11 through Sept. 13, most airlines have cancelled flights at RSW due to Hurricane Irma. You should contact your airline to get the most current information.

Tallahassee Airport‏ @iFlyTallahassee
TLH is open to military & emergency ops/relief air traffic only. Commercial flights are scheduled to resume Mon 9/11 at 7:40pm #IrmaTLH

Tampa Intl Airport‏ @FlyTPA
No flights scheduled  today as we assess the airports condition. Most  will resume Tue or Wed. Contact your airline for flight info.

Are there other airport cancellations we missed? Comments welcome, below.