KLM Flight KL644 Deals & Information (2025/2026)

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KLM Flight 644 Route Deals From $299

The cheapest prices found with in the last 7 days for return flights were $473 and $299 for one-way flights to Schiphol for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Nov 2 - Mon, Nov 10
JFK
John F. Kennedy Intl.
AMS
Schiphol
$473 Roundtrip, found 5 hours ago
$473
Roundtrip
found 5 hours ago
Select KLM flight, departing Sun, Nov 2 from John F. Kennedy Intl. to Schiphol, returning Mon, Nov 10, priced at $473 found 5 hours ago

Frequently asked questions

What route does flight number KL644 take?
Flight number KL644 takes roughly 7 hours and 20 minutes to jet straight from New York, NY Airport (JFK-John F. Kennedy Intl.) to Amsterdam Airport Schiphol. We all know there's magic in the destination, but half the fun is in the journey!
How often is KL644 on time?
KLM flight number KL644 between New York, NY Airport (JFK-John F. Kennedy Intl.) and AMS takes off according to schedule 100% of the time --- so you can relax knowing that you will get to your destination ASAP. If your journey is late, you can expect to wait about 3 minutes. This route has a star rating of 4.45.
What terminal does KL644 fly out of?
KL644 runs between JFK Airport and Amsterdam Airport Schiphol, and those booked on this flight usually depart from Terminal 4.
What kind of plane is on flight number KL644?
The route for KL644 is generally JFK to AMS, and the Boeing 787-9 is the aircraft model you'll probably be flying on.
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 KL644 flight with Travelocity, please visit our Customer Service Portal.