Icelandair Flight 645 Deals & Information (2026/2027)

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Icelandair Flight 645 Route Deals From $452

The cheapest prices found with in the last 7 days for return flights were $546 and $452 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Feb 6 - Tue, Feb 10
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$546 Roundtrip, found 3 days ago
$546
Roundtrip
found 3 days ago
Select Icelandair flight, departing Fri, Feb 6 from Keflavik Intl. to Washington Dulles Intl., returning Tue, Feb 10, priced at $546 found 3 days ago
Thu, Feb 5 - Mon, Feb 9
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$549 Roundtrip, found 3 days ago
$549
Roundtrip
found 3 days ago
Select Icelandair flight, departing Thu, Feb 5 from Keflavik Intl. to Washington Dulles Intl., returning Mon, Feb 9, priced at $549 found 3 days ago
Sun, Feb 22 - Sun, Mar 1
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$549 Roundtrip, found 10 hours ago
$549
Roundtrip
found 10 hours ago
Select Icelandair flight, departing Sun, Feb 22 from Keflavik Intl. to Washington Dulles Intl., returning Sun, Mar 1, priced at $549 found 10 hours ago
Thu, Jan 29 - Wed, Feb 4
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$552 Roundtrip, found 1 day ago
$552
Roundtrip
found 1 day ago
Select Icelandair flight, departing Thu, Jan 29 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Feb 4, priced at $552 found 1 day ago
Wed, Oct 14 - Sat, Oct 24
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$557 Roundtrip, found 4 days ago
$557
Roundtrip
found 4 days ago
Select Icelandair flight, departing Wed, Oct 14 from Keflavik Intl. to Washington Dulles Intl., returning Sat, Oct 24, priced at $557 found 4 days ago
Sun, Aug 9 - Fri, Aug 14
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$561 Roundtrip, found 5 days ago
$561
Roundtrip
found 5 days ago
Select Icelandair flight, departing Sun, Aug 9 from Keflavik Intl. to Washington Dulles Intl., returning Fri, Aug 14, priced at $561 found 5 days ago
Sun, Jul 5 - Wed, Jul 8
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$564 Roundtrip, found 2 days ago
$564
Roundtrip
found 2 days ago
Select Icelandair flight, departing Sun, Jul 5 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Jul 8, priced at $564 found 2 days ago
Thu, Apr 30 - Mon, May 4
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$568 Roundtrip, found 3 days ago
$568
Roundtrip
found 3 days ago
Select Icelandair flight, departing Thu, Apr 30 from Keflavik Intl. to Washington Dulles Intl., returning Mon, May 4, priced at $568 found 3 days ago
Sat, Mar 28 - Sat, Apr 4
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$570 Roundtrip, found 6 days ago
$570
Roundtrip
found 6 days ago
Select Icelandair flight, departing Sat, Mar 28 from Keflavik Intl. to Washington Dulles Intl., returning Sat, Apr 4, priced at $570 found 6 days ago
Tue, Jun 9 - Mon, Jun 22
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$572 Roundtrip, found 3 days ago
$572
Roundtrip
found 3 days ago
Select Icelandair flight, departing Tue, Jun 9 from Keflavik Intl. to Washington Dulles Intl., returning Mon, Jun 22, priced at $572 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.