Royal Dutch Airlines offers accessible international flights to Amsterdam and other locations from Terminal 4 of Phoenix Sky Harbor International Airport (PHX). With choices for online, kiosk, and counter check-ins, KLM Airlines PHX Terminal provides a seamless check-in experience and is well known for its effective customer service. For international flights, it is recommended that passengers arrive at least three hours before departure. With Economy Class allowing one checked bag up to 23 kg (50 pounds) and Business Class allowing two checked bags up to 32 kg (70 lbs) each, travelers benefit from a liberal luggage policy. Terminal 4 offers free Wi-Fi, duty-free shopping, a variety of food options, and charging stations. The opulent Delta Sky Club Lounge is open to SkyPriority members and premium travelers, offering Free drinks and refreshments, as well as cozy seats. A pleasant and comfortable journey from Phoenix is guaranteed by KLM's fleet of contemporary aircraft, which includes the Boeing 787 Dreamliner.

In order to ensure a comfortable flight, KLM passengers can check in at designated counters at Terminal 4. To save time at the airport, the airline now provides mobile and online check-in alternatives beginning 24 hours before departure. For individuals who would like to check in at the airport, KLM has self-service kiosks and customer service counters for speedier check-in. 

KLM advises arriving at least three hours before departure for international flights in order to give yourself adequate time for boarding, security checks, and check-in. Travelers may get through the airport faster because there are fewer security checks.

Passengers traveling with KLM have access to premium services including SkyPriority for Business and Premium Class clients. This includes expedited check-in, security screening, and boarding, making the airport experience faster and more comfortable. Terminal 4's amenities are on par with KLM's high-end selection. The airport has a variety of dining options, such as cafes, sit-down restaurants, and quick snacks, to suit a wide range of tastes and preferences. Retail stores also offer duty-free shopping to visitors who want to purchase luxury products, electronics, and souvenirs before taking off.