For goodness sake - it is "He checked in to the hotel." That's why they have "Check In" counters in hotel lobbies. A more correct sentence would read:
"He checked in at the hotel when he arrived." Also, "When he arrived at the hotel, he checked in."
For goodness sake - it is "He checked in to the hotel." That's why they have "Check In" counters in hotel lobbies. A more correct sentence would read:
"He checked in at the hotel when he arrived." Also, "When he arrived at the hotel, he checked in."
Both checked in and checked into are correct. The better choice would be 'into' because the combination is efficient: one word is more economical than two.
He checked into the hotel. :D :D
He checked in to the hotel. :D