KLM is a Dutch airline.
KLM may also refer to:
- klm or kilolumen, the thousandfold unit multiple of the lumen
- Kerr-lens modelocking, a method of modelocking lasers
- KLM Open, former name of the Dutch Open golf tournament
- Koninklijk Legermuseum, another name of the Royal Museum of the Armed Forces and Military History, Brussels, Belgium
- 4 KLM, a village in Sri Ganganagar district, Rajasthan, India
- Karachi–Lahore Motorway, Pakistan