Passengers stranded on the tarmac for five hours without food or water broke out into song — with a hilarious rendition of R Kelly's "I Believe I Can Fly."  Feeling "Trapped in the Closet" and just wanting the keys to the "Ignition," the fed-up Allegiant Air flyers were caught on camera belting out the catchy tune's chorus.  The entire cabin sang along as one traveler held his portable music player aloft.  RELATED: AMERICAN AIRLINES TO LET THOSE TRAVELING LIGHT TO BOARD FIRST  Video of the delirious travelers was posted online and has since gone viral with more than 16,000 views.  It wasn't all fun and games, however, as Fox News reports one woman passed out and two others suffered medical problems from the soaring heat — caused by temperatures rising to 110 degrees outside and the engine-connected AC unable to be switched on.  The flight, normally one hour in duration, was due to leave Las Vegsas for Phoenix at 11 a.m. on Sunday.  RELATED: VIDEO: AIRLINE WORKER FREAKS OUT AT COMPLAINTS  But the 121 passengers were left waiting as the MD-80 plane first had a technical issue, then a passenger was taken ill.  Transferred back to the terminal for an hour, the grounded fliers were put on a second plane — but that was also delayed by technical problems.  The flight finally left at 3:45 p.m.  RELATED: RICHARD BRANSON DRESSES UP AS STEWARDESS  Airline spokesman Bryan Davis denied claims water had not been handed out .  But he also revealed that all passengers had received complimentary drinks on the plane and a $100 credit for future travel.  On a mobile device? Watch the video here.
The Las Vegas to Phoenix flight on an Allegiant Air MD-80 normally takes one hour — but the worst part of the delay was an un-air-conditioned cabin.