Icelandair Flight 645 Deals & Information (2026/2027)

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Icelandair Flight 645 Route Deals From $476

The cheapest prices found with in the last 7 days for return flights were $604 and $476 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Wed, Sep 2 - Wed, Sep 9
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$604 Roundtrip, found 5 days ago
$604
Roundtrip
found 5 days ago
Select Icelandair flight, departing Wed, Sep 2 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Sep 9, priced at $604 found 5 days ago
Thu, Feb 4 - Wed, Feb 17
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$606 Roundtrip, found 6 days ago
$606
Roundtrip
found 6 days ago
Select Icelandair flight, departing Thu, Feb 4 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Feb 17, priced at $606 found 6 days ago
Fri, Oct 16 - Mon, Oct 19
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$612 Roundtrip, found 1 day ago
$612
Roundtrip
found 1 day ago
Select Icelandair flight, departing Fri, Oct 16 from Keflavik Intl. to Washington Dulles Intl., returning Mon, Oct 19, priced at $612 found 1 day ago
Wed, Jul 1 - Sun, Jul 12
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$616 Roundtrip, found 5 days ago
$616
Roundtrip
found 5 days ago
Select Icelandair flight, departing Wed, Jul 1 from Keflavik Intl. to Washington Dulles Intl., returning Sun, Jul 12, priced at $616 found 5 days ago
Thu, May 21 - Wed, May 27
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$619 Roundtrip, found 6 days ago
$619
Roundtrip
found 6 days ago
Select Icelandair flight, departing Thu, May 21 from Keflavik Intl. to Washington Dulles Intl., returning Wed, May 27, priced at $619 found 6 days ago
Thu, Jul 9 - Sat, Jul 18
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$625 Roundtrip, found 4 hours ago
$625
Roundtrip
found 4 hours ago
Select Icelandair flight, departing Thu, Jul 9 from Keflavik Intl. to Washington Dulles Intl., returning Sat, Jul 18, priced at $625 found 4 hours ago
Mon, May 18 - Wed, May 27
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$629 Roundtrip, found 19 hours ago
$629
Roundtrip
found 19 hours ago
Select Icelandair flight, departing Mon, May 18 from Keflavik Intl. to Washington Dulles Intl., returning Wed, May 27, priced at $629 found 19 hours ago
Thu, Jul 2 - Mon, Jul 6
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$630 Roundtrip, found 6 days ago
$630
Roundtrip
found 6 days ago
Select Icelandair flight, departing Thu, Jul 2 from Keflavik Intl. to Washington Dulles Intl., returning Mon, Jul 6, priced at $630 found 6 days ago
Thu, May 21 - Thu, May 28
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$638 Roundtrip, found 5 days ago
$638
Roundtrip
found 5 days ago
Select Icelandair flight, departing Thu, May 21 from Keflavik Intl. to Washington Dulles Intl., returning Thu, May 28, priced at $638 found 5 days ago
Tue, Jun 30 - Mon, Jul 6
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$639 Roundtrip, found 3 days ago
$639
Roundtrip
found 3 days ago
Select Icelandair flight, departing Tue, Jun 30 from Keflavik Intl. to Washington Dulles Intl., returning Mon, Jul 6, priced at $639 found 3 days 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.