Icelandair Flight 644 Deals & Information (2026/2027)

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Icelandair Flight 644 Route Deals From $443

The cheapest prices found with in the last 7 days for return flights were $505 and $443 for one-way flights to Keflavik Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Mon, Apr 20 - Thu, Apr 30
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$505 Roundtrip, found 6 days ago
$505
Roundtrip
found 6 days ago
Select Icelandair flight, departing Mon, Apr 20 from Washington Dulles Intl. to Keflavik Intl., returning Thu, Apr 30, priced at $505 found 6 days ago
Mon, Apr 27 - Fri, May 1
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$545 Roundtrip, found 3 days ago
$545
Roundtrip
found 3 days ago
Select Icelandair flight, departing Mon, Apr 27 from Washington Dulles Intl. to Keflavik Intl., returning Fri, May 1, priced at $545 found 3 days ago
Sun, Apr 26 - Thu, Apr 30
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$549 Roundtrip, found 2 days ago
$549
Roundtrip
found 2 days ago
Select Icelandair flight, departing Sun, Apr 26 from Washington Dulles Intl. to Keflavik Intl., returning Thu, Apr 30, priced at $549 found 2 days ago
Mon, Apr 20 - Wed, Apr 29
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$553 Roundtrip, found 2 days ago
$553
Roundtrip
found 2 days ago
Select Icelandair flight, departing Mon, Apr 20 from Washington Dulles Intl. to Keflavik Intl., returning Wed, Apr 29, priced at $553 found 2 days ago
Mon, Oct 19 - Wed, Oct 28
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$554 Roundtrip, found 2 days ago
$554
Roundtrip
found 2 days ago
Select Icelandair flight, departing Mon, Oct 19 from Washington Dulles Intl. to Keflavik Intl., returning Wed, Oct 28, priced at $554 found 2 days ago
Mon, Apr 20 - Sun, Apr 26
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$557 Roundtrip, found 5 days ago
$557
Roundtrip
found 5 days ago
Select Icelandair flight, departing Mon, Apr 20 from Washington Dulles Intl. to Keflavik Intl., returning Sun, Apr 26, priced at $557 found 5 days ago
Mon, Apr 27 - Mon, May 4
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$564 Roundtrip, found 2 days ago
$564
Roundtrip
found 2 days ago
Select Icelandair flight, departing Mon, Apr 27 from Washington Dulles Intl. to Keflavik Intl., returning Mon, May 4, priced at $564 found 2 days ago
Sun, May 10 - Thu, May 21
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$571 Roundtrip, found 3 days ago
$571
Roundtrip
found 3 days ago
Select Icelandair flight, departing Sun, May 10 from Washington Dulles Intl. to Keflavik Intl., returning Thu, May 21, priced at $571 found 3 days ago
Mon, Oct 12 - Wed, Oct 21
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$580 Roundtrip, found 2 days ago
$580
Roundtrip
found 2 days ago
Select Icelandair flight, departing Mon, Oct 12 from Washington Dulles Intl. to Keflavik Intl., returning Wed, Oct 21, priced at $580 found 2 days ago
Tue, Oct 20 - Fri, Oct 30
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$590 Roundtrip, found 6 days ago
$590
Roundtrip
found 6 days ago
Select Icelandair flight, departing Tue, Oct 20 from Washington Dulles Intl. to Keflavik Intl., returning Fri, Oct 30, priced at $590 found 6 days ago
Fri, Oct 16 - Mon, Oct 19
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$590 Roundtrip, found 2 days ago
$590
Roundtrip
found 2 days ago
Select Icelandair flight, departing Fri, Oct 16 from Washington Dulles Intl. to Keflavik Intl., returning Mon, Oct 19, priced at $590 found 2 days ago
Wed, Oct 14 - Mon, Oct 19
IAD
Washington Dulles Intl.
KEF
Keflavik Intl.
$600 Roundtrip, found 18 hours ago
$600
Roundtrip
found 18 hours ago
Select Icelandair flight, departing Wed, Oct 14 from Washington Dulles Intl. to Keflavik Intl., returning Mon, Oct 19, priced at $600 found 18 hours ago

Frequently asked questions

What route does flight number FI644 take?
Flight number FI644 takes roughly 5 hours and 55 minutes to jet non-stop from IAD to Reykjavik Airport (KEF-Keflavik Intl.). Sure, there's magic in the destination, but the journey is always half the fun!
How often is FI644 on time?
If you're flying on Icelandair flight number FI644 between Washington, DC Airport (IAD-Washington Dulles Intl.) and Reykjavík–Keflavík Airport, 90% of these journeys touch down according to schedule. If you are delayed, you're likely to wait approximately 25 minutes on average. Thanks to the air carrier's high standards, this service has a 3.8-star rating.
What kind of plane is on flight number FI644?
The route for flight number FI644 is most commonly Washington, DC Airport (IAD-Washington Dulles Intl.) to Reykjavik Airport (KEF-Keflavik Intl.), and the Boeing 767-300 is the type of aircraft you're likely to 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 FI644 flight with Travelocity, please visit our Customer Service Portal.