"What's the plural of check-in?"

The plural of check-in is check-ins.

Definition of check-in:

As travel becomes more common, the word "check-in" has become a household term. It is a noun that refers to the process of registering at a hotel or airport.

When it comes to using it in its plural form, people often get confused. Is it "check-ins" or "checks-in"? In this blog post, we'll explore the plural of "check-in" and provide some examples to help clarify.

Which is Correct: Check-Ins or Checks-In?

Firstly, let's define "check-in" as a noun. It is the act of reporting one's arrival, such as checking in at a hotel, airport, or event.

It is a vital part of the travel experience, and it usually involves verifying identification, receiving boarding passes, or collecting room keys.

Now, let's address the plural form of "check-in." The correct plural is "check-ins." This is because "check-in" is a compound noun made up of two words, "check" and "in." 

When forming the plural of a compound noun which is not made of nouns itself, we usually add an "s" to the end of the word. In this case since neither “check” nor “in” is a noun, the plural of “check-in” is “check-ins.”

This follows the same rule as words such as grown-up, “sit-up”, and “good-for-nothing”, and all other compound nouns which are made from other word types such as verbs, adjectives, and prepositions.

Plural of Check-in Example Sentences

To illustrate, here are three example sentences each with the singular and plural noun forms of "check-in":


  • I need to do my check-in before the flight.

  • The hotel staff reminded me to complete the check-in process.

  • Can you please help me with my check-in at the front desk?


  • All the check-ins for the flight have been completed.

  • The hotel has a separate area for group check-ins.

  • The event organizers set up multiple check-ins to accommodate the attendees.

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The plural of check-in is check-ins
The plural of check-in is check-ins