As of today, May 26, 2015 I will make it my mission anyone that asks about Justfly will know don't even make them an option when it comes to booking a flight.
This site gets your attention by listing the lowest prices for flight bookings. My husband and I are planning a trip to Hawaii, the tickets to Hawaii can be expensive. So when I kept getting the "Justfly Fare Alerts" I said why not. Of course if it's too good to be true, well in this case it was. I called the 800 number spoke with a reservation person with very bad broken english. I should've hung up at that moment. I had to keep reminding him my husband was a "Jr." The resevationist "Ian" spelled every letter in the order of the my husband's name to make sure the name matched what is on the government issued I.D. Low and behold, when I received my reservation his name was not correct. I immediately called Justfly back, got another reservationist "Polo" with horrible broken english, explained my predicament to the person and they told me to call back within 24 hours. I called back the next day, another reservationist "Rizelle" with you guessed it, broken english told me they would have to cancel the flight, charge me $75, in order to correct the mistake "Ian" made. She said she had to put me on hold. While I was on hold (10 minutes, then Rizelle would come back on the line to tell me she's "trying" to contact the airline company, put me on hold an additional 5 minutes) I looked up reviews for Justfly, and found out several people had the same complaint as I did. They put your information in incorrectly, the only way to correct it is to charge a $75 cancellation fee.
When Rizelle came back online I informed her I would be calling my cc company and have the charges reversed and report them to the BBB Internet Division.
Bottom line, I will never deal with them again. I called my cc company to have all charges reversed (including the insurance that cost me $130.00)