It was the 10th leg of its round the world quest.
Swiss adventurer Andre Borschberg was at the controls, having taken over from Bertrand Piccard.
Piccard flew Solar Impulse to the West Coast of the US from Hawaii just over a week ago.
The latest stint was relatively short - 1,113 km.
Take-off from the famous Moffett Airfield occurred at 05:03 PDT (12:03 GMT) and the plane landed in Phoenix at 20:55 PDT.
The team has traversed America before, in 2013. That crossing was undertaken in the prototype predecessor to the current aircraft. But it does mean the weather conditions the Solar Impulse is likely to encounter will be well understood.
Piccard and Borschberg are aiming to get to New York by the start of June, to begin preparations for the big Atlantic crossing.
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