Icelandair Flight 645 Deals & Information (2025/2026)

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Icelandair Flight 645 Route Deals From $460

The cheapest prices found with in the last 7 days for return flights were $557 and $460 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Apr 15 - Fri, Apr 24
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$557 Roundtrip, found 1 day ago
$557
Roundtrip
found 1 day ago
Select Icelandair flight, departing Wed, Apr 15 from Keflavik Intl. to Washington Dulles Intl., returning Fri, Apr 24, priced at $557 found 1 day ago
Sun, Oct 12 - Tue, Oct 21
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$558 Roundtrip, found 19 hours ago
$558
Roundtrip
found 19 hours ago
Select Icelandair flight, departing Sun, Oct 12 from Keflavik Intl. to Washington Dulles Intl., returning Tue, Oct 21, priced at $558 found 19 hours ago
Sun, Oct 19 - Wed, Oct 22
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$563 Roundtrip, found 6 days ago
$563
Roundtrip
found 6 days ago
Select Icelandair flight, departing Sun, Oct 19 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Oct 22, priced at $563 found 6 days ago
Mon, Jan 12 - Fri, Jan 16
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$569 Roundtrip, found 1 day ago
$569
Roundtrip
found 1 day ago
Select Icelandair flight, departing Mon, Jan 12 from Keflavik Intl. to Washington Dulles Intl., returning Fri, Jan 16, priced at $569 found 1 day ago
Mon, Nov 10 - Wed, Nov 26
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$575 Roundtrip, found 5 days ago
$575
Roundtrip
found 5 days ago
Select Icelandair flight, departing Mon, Nov 10 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Nov 26, priced at $575 found 5 days ago
Tue, Nov 11 - Sat, Nov 15
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$575 Roundtrip, found 4 days ago
$575
Roundtrip
found 4 days ago
Select Icelandair flight, departing Tue, Nov 11 from Keflavik Intl. to Washington Dulles Intl., returning Sat, Nov 15, priced at $575 found 4 days ago
Mon, Sep 1 - Wed, Sep 10
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$582 Roundtrip, found 1 day ago
$582
Roundtrip
found 1 day ago
Select Icelandair flight, departing Mon, Sep 1 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Sep 10, priced at $582 found 1 day ago
Thu, Sep 4 - Wed, Sep 10
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$582 Roundtrip, found 2 hours ago
$582
Roundtrip
found 2 hours ago
Select Icelandair flight, departing Thu, Sep 4 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Sep 10, priced at $582 found 2 hours ago
Thu, Oct 16 - Mon, Oct 20
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$586 Roundtrip, found 5 days ago
$586
Roundtrip
found 5 days ago
Select Icelandair flight, departing Thu, Oct 16 from Keflavik Intl. to Washington Dulles Intl., returning Mon, Oct 20, priced at $586 found 5 days ago
Thu, Nov 27 - Thu, Jan 1
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$592 Roundtrip, found 17 hours ago
$592
Roundtrip
found 17 hours ago
Select Icelandair flight, departing Thu, Nov 27 from Keflavik Intl. to Washington Dulles Intl., returning Thu, Jan 1, priced at $592 found 17 hours ago

Frequently asked questions

What route does flight number FI645 take?
Flight number FI645 flies non-stop from Reykjavik Airport (KEF-Keflavik Intl.) to Washington, DC Airport (IAD-Washington Dulles Intl.). During this journey, you can expect to be in the air for 6 hours and 20 minutes. Book ahead to get your preferred seat.
What kind of plane is on flight number FI645?
The route for flight number FI645 is almost always KEF to Washington, DC Airport (IAD-Washington Dulles Intl.), and the Boeing 767-300 is the type of aircraft 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 FI645 flight with Travelocity, please visit our Customer Service Portal.