KLM Flight KL643 Deals & Information (2025/2026)

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KLM Flight 643 Route Deals From $1,703

The cheapest prices found with in the last 7 days for return flights were $927 and $1,703 for one-way flights to John F. Kennedy Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Jul 16 - Sun, Aug 24
AMS
Schiphol
JFK
John F. Kennedy Intl.
$927 Roundtrip, found 2 days ago
$927
Roundtrip
found 2 days ago
Select KLM flight, departing Wed, Jul 16 from Schiphol to John F. Kennedy Intl., returning Sun, Aug 24, priced at $927 found 2 days ago

Frequently asked questions

What route does flight number KL643 take?
Flight number KL643 flies straight from Schiphol Airport (AMS) to New York, NY Airport (JFK-John F. Kennedy Intl.). During this journey, you’ll be in the air for 8 hours and 4 minutes. Book ahead to secure your preferred seat.
What kind of plane is on flight number KL643?
The Boeing 787-9 is the plane predominantly used for flight number KL643. This flight nearly always takes off from Amsterdam Airport (AMS-Schiphol) and arrives at John F. Kennedy Intl. Airport (JFK).
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 KL643 flight with Travelocity, please visit our Customer Service Portal.