---
title: "CUN is which airport? Cancún"
description: "CUN is Cancún International Airport in Cancún, Mexico. Why the code is CUN and not something you could guess, what MMUN means, and the codes it gets mixed up with."
url: https://atoneplace.net/airport/cun/
site: "At One Place"
---

# What airport is CUN?

**CUN is: Cancún International Airport**

Cancún, Mexico

## Why the code is CUN

CUNcún.

The airport authority or a contemporaneous record states this directly.

## The airport

- **IATA code:** CUN
- **ICAO code:** MMUN
- **Airport:** Cancún International Airport
- **City:** Cancún, Mexico
- **Code origin:** Documented

Cancún handles more international passengers than Mexico City, which is unusual for a resort airport in a country with a large capital. The city itself was planned from nothing in 1970 by a Mexican government computer model looking for the best place to put a tourist industry.

## The other code, MMUN

Every airport has two codes. The three-letter IATA code, CUN, is the one on your boarding pass and your luggage tag, and it is assigned for commercial use. The four-letter ICAO code, MMUN, is the one pilots and controllers use, and it is assigned geographically: the first letter or two identify the region, so every airport in the same part of the world shares a prefix. That is why MMUN looks nothing like CUN.

## Common questions

### What airport is CUN?

Cancún International Airport, in Cancún, Mexico.

### Why is Cancún's airport called CUN?

CUNcún.

### What is the difference between CUN and MMUN?

CUN is the IATA code, used commercially — tickets, timetables, luggage tags. MMUN is the ICAO code, used operationally by pilots and air traffic control, and assigned geographically by region.

## Related pages

- [Mexico](https://atoneplace.net/country/mexico/)
- [The flag of Mexico](https://atoneplace.net/flag/mexico/)
- [Airport codes in Mexico](https://atoneplace.net/airport/in/mexico/)
- [What airport is MEX?](https://atoneplace.net/airport/mex/)

## Sources

- OurAirports — OurAirports (https://ourairports.com/data/) [Public domain]