The DJ, wearing a T-shirt which showed off his winter tan, was clutching a coffee in a bid to ward off jet lag.
Calvin has jetted in to the States as part of his current tour, which will next take him to Australia before he heads closer to home in mid-December.
Calvin's popstar girlfriend Rita Ora is currently in New York so he arrived in LA alone. He'd previously been in Miami, where he saw a picture of beautiful model Nina Agdal, aka Max George from The Wanted's new girlfriend, and tweeted her a message.
He said: "Arrived in Miami! Liv tonight! Hi @NinaAgdal lol."
To which she replied: "oh goodness.... wish i was there! Have a fun night breeeee."
Max, Rita... Do you need to sort your other halves out ASAP?! Apparently not. Thankfully, it looks like Calvin and Nina have simply been mates for a while. Phew!
Meanwhile Rita has also been in the States and it's thought she's been working on her second album while in New York.
Earlier in November, she was missing her man so much that she put a posted a snap of his smiling face on her Instagram. Cute!
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