Icelandair flight FI 644: Dulles, Washington - Keflavik, Reykjavik

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FLIGHT SCHEDULE
Direct Flights:
Daily 19:40 Dulles, Washington (IAD) 06:35 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Effective from 2025-11-02 The flight arrives 1 day after departure.
Wed,Fri 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 8 (7M8) 5:55 Valid until 2025-05-02 The flight arrives 1 day after departure.
Mon-Thu,Sat,Sun 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Valid until 2025-05-08 The flight arrives 1 day after departure.
Daily 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Effective 2025-05-09 through 2025-05-21 The flight arrives 1 day after departure.
Tue,Thu,Sat 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 8 (7M8) 5:55 Effective 2025-05-22 through 2025-05-29 The flight arrives 1 day after departure.
Mon,Wed,Fri,Sun 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Effective 2025-05-23 through 2025-05-28 The flight arrives 1 day after departure.
Daily 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 8 (7M8) 5:55 Effective 2025-05-30 through 2025-09-21 The flight arrives 1 day after departure.
Mon,Sun 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Effective 2025-09-22 through 2025-09-28 The flight arrives 1 day after departure.
Mon-Sat 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 8 (7M8) 5:55 Effective 2025-09-23 through 2025-10-01 The flight arrives 1 day after departure.
Thu 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Operates only on 2025-10-02 The flight arrives 1 day after departure.
Daily 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 8 (7M8) 5:55 Effective 2025-10-03 through 2025-10-09 The flight arrives 1 day after departure.
Fri 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Operates only on 2025-10-10 The flight arrives 1 day after departure.
Daily 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 8 (7M8) 5:55 Effective 2025-10-11 through 2025-10-18 The flight arrives 1 day after departure.
Wed,Sat,Sun 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Effective 2025-10-19 through 2025-10-25 The flight arrives 1 day after departure.
Mon,Tue,Thu,Fri 20:30 Dulles, Washington (IAD) 06:25 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 8 (7M8) 5:55 Effective 2025-10-20 through 2025-10-24 The flight arrives 1 day after departure.
Daily 20:40 Dulles, Washington (IAD) 06:35 Keflavik, Reykjavik (KEF) FI 644 Non-stop Boeing 737 MAX 9 (7M9) 5:55 Effective 2025-10-26 through 2025-11-01 The flight arrives 1 day after departure.

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FI 644 is an international flight departing from Dulles, Washington airport, United States (IAD) and arriving at Keflavik, Reykjavik airport, Iceland (KEF).
The flight distance is 2791 miles, or 4491 km.
The timezone of the departure airport is UTC-5 (plus 1h DST), and the timezone of the arrival airport is UTC+0 . Current time at the point of departure is 11:16am, and 3:16pm at the point of arrival. There is a 4 hour time difference between the airports.
For direct flights, the flight time is 5:55.

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Icelandair flight FI 644:
Dulles, Washington - Keflavik, Reykjavik

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FLIGHT SCHEDULE

Direct Flights:

Icelandair FI644

19:40

Dulles, Washington (IAD)

06:35(+1)

Keflavik, Reykjavik (KEF)

Effective from 2025-11-02

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Valid until 2025-05-02

Mon
-

Tue
-

Wed

Thu
-

Fri

Sat
-

Sun
-

Duration: 5:55, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Valid until 2025-05-08

Mon

Tue

Wed

Thu

Fri
-

Sat

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-05-09 through 2025-05-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-05-22 through 2025-05-29

Mon
-

Tue

Wed
-

Thu

Fri
-

Sat

Sun
-

Duration: 5:55, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-05-23 through 2025-05-28

Mon

Tue
-

Wed

Thu
-

Fri

Sat
-

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-05-30 through 2025-09-21

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-09-22 through 2025-09-28

Mon

Tue
-

Wed
-

Thu
-

Fri
-

Sat
-

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-09-23 through 2025-10-01

Mon

Tue

Wed

Thu

Fri

Sat

Sun
-

Duration: 5:55, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Operates only on 2025-10-02

Mon
-

Tue
-

Wed
-

Thu

Fri
-

Sat
-

Sun
-

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-10-03 through 2025-10-09

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Operates only on 2025-10-10

Mon
-

Tue
-

Wed
-

Thu
-

Fri

Sat
-

Sun
-

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-10-11 through 2025-10-18

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-10-19 through 2025-10-25

Mon
-

Tue
-

Wed

Thu
-

Fri
-

Sat

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

Icelandair FI644

20:30

Dulles, Washington (IAD)

06:25(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-10-20 through 2025-10-24

Mon

Tue

Wed
-

Thu

Fri

Sat
-

Sun
-

Duration: 5:55, non-stop
Boeing 737 MAX 8 (7M8)
The flight arrives 1 day after departure.

Icelandair FI644

20:40

Dulles, Washington (IAD)

06:35(+1)

Keflavik, Reykjavik (KEF)

Effective 2025-10-26 through 2025-11-01

Mon

Tue

Wed

Thu

Fri

Sat

Sun

Duration: 5:55, non-stop
Boeing 737 MAX 9 (7M9)
The flight arrives 1 day after departure.

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FI 644 is an international flight departing from Dulles, Washington airport, United States (IAD) and arriving at Keflavik, Reykjavik airport, Iceland (KEF).
The flight distance is 2791 miles, or 4491 km.
The timezone of the departure airport is UTC-5 (plus 1h DST), and the timezone of the arrival airport is UTC+0 . Current time at the point of departure is 11:16am, and 3:16pm at the point of arrival. There is a 4 hour time difference between the airports.
For direct flights, the flight time is 5:55.

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