Convenient, but 3rd party $ markup
Convenient? Yes. Justfly does a better job than other flight search platforms at showing the cheapest flights and giving "side-by-side" comparisons. HOWEVER! I felt pretty stupid after I purchased the ticket (payment is processed through Justfly) and, on a hunch, checked the prices on the airline's actual website... yup, would've saved $40 just buying direct from them. Justfly is convenient and intuitive, but they're a 3rd party and will therefore build in a markup for their cut. It's to be expected.