KLM Flight 621 Deals & Information (2025/2026)

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Frequently asked questions

What route does flight number KL621 take?
Flight number KL621 flies directly from AMS to Hartsfield–Jackson Atlanta International Airport. During this trip, you can expect to be in the air for roughly 9 hours and 20 minutes. It’s wise to book ahead to get your favorite seat.
What kind of plane is on flight number KL621?
You’ll likely be traveling aboard the Boeing 777-300ER if you have a seat on flight KL621. This flight usually departs from Amsterdam Airport Schiphol and lands at Hartsfield-Jackson Atlanta Intl. Airport (ATL).
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your KL621 flight with Travelocity, please visit our Customer Service Portal.