KLM is a classic network carrier and offers free check-in at the airport.
Check-in at the airport
Airport check-in is offered free of charge at all airports served by KLM. The opening and closing times of the counters vary considerably depending on the destination. In Europe, expect counters to open 2 hours and close 45 minutes before departure.
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For flights from the Americas or Africa, opening times will be between 3-1 hours before scheduled departure.
Online check-in
You can check in online via your mobile phone or computer. Check-in is available 30 hours before departure (24 hours before departure for flights to/from the USA) and the latest you can print your boarding pass is 2 hours before departure.
You can keep your boarding passes on your phone and present a QR code from your mobile phone screen at the airport.
The KLM mobile app is available at Google Play / App Store.
Seat selection
You can choose a specific seat on the aircraft at any time from the purchase of your ticket to online check-in. There is always a fee for selecting a specific seat, even during online check-in.
The amounts vary significantly by seat (front/back) and by route and range from 10 eur to 25 eur.
If you do not select a seat, you will be assigned one free of charge during check-in, but at random.
If there are more than one of you travelling on the same booking, the system will automatically seat you next to each other.