Icelandair Flight 645 Deals & Information (2026/2027)

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Icelandair Flight 645 Route Deals From $484

The cheapest prices found with in the last 7 days for return flights were $351 and $484 for one-way flights to Washington Dulles Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Oct 1 - Wed, Oct 7
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$351 Roundtrip, found 13 hours ago
$351
Roundtrip
found 13 hours ago
Select Icelandair flight, departing Thu, Oct 1 from Keflavik Intl. to Washington Dulles Intl., returning Wed, Oct 7, priced at $351 found 13 hours ago
Tue, Sep 8 - Tue, Sep 22
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$365 Roundtrip, found 11 hours ago
$365
Roundtrip
found 11 hours ago
Select Icelandair flight, departing Tue, Sep 8 from Keflavik Intl. to Washington Dulles Intl., returning Tue, Sep 22, priced at $365 found 11 hours ago
Tue, Sep 8 - Tue, Sep 22
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$488 Roundtrip, found 11 hours ago
$488
Roundtrip
found 11 hours ago
Select Icelandair flight, departing Tue, Sep 8 from Keflavik Intl. to Washington Dulles Intl., returning Tue, Sep 22, priced at $488 found 11 hours ago
Thu, Oct 8 - Tue, Oct 13
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$597 Roundtrip, found 23 hours ago
$597
Roundtrip
found 23 hours ago
Select Icelandair flight, departing Thu, Oct 8 from Keflavik Intl. to Washington Dulles Intl., returning Tue, Oct 13, priced at $597 found 23 hours ago
Fri, Oct 16 - Tue, Oct 20
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$608 Roundtrip, found 5 days ago
$608
Roundtrip
found 5 days ago
Select Icelandair flight, departing Fri, Oct 16 from Keflavik Intl. to Washington Dulles Intl., returning Tue, Oct 20, priced at $608 found 5 days ago
Mon, Jul 20 - Fri, Jul 24
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$610 Roundtrip, found 5 days ago
$610
Roundtrip
found 5 days ago
Select Icelandair flight, departing Mon, Jul 20 from Keflavik Intl. to Washington Dulles Intl., returning Fri, Jul 24, priced at $610 found 5 days ago
Thu, Jun 11 - Sun, Jun 14
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$612 Roundtrip, found 3 days ago
$612
Roundtrip
found 3 days ago
Select Icelandair flight, departing Thu, Jun 11 from Keflavik Intl. to Washington Dulles Intl., returning Sun, Jun 14, priced at $612 found 3 days ago
Wed, Jun 10 - Sun, Jun 14
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$621 Roundtrip, found 1 day ago
$621
Roundtrip
found 1 day ago
Select Icelandair flight, departing Wed, Jun 10 from Keflavik Intl. to Washington Dulles Intl., returning Sun, Jun 14, priced at $621 found 1 day ago
Wed, Sep 30 - Sat, Oct 10
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$623 Roundtrip, found 1 day ago
$623
Roundtrip
found 1 day ago
Select Icelandair flight, departing Wed, Sep 30 from Keflavik Intl. to Washington Dulles Intl., returning Sat, Oct 10, priced at $623 found 1 day ago
Wed, Jul 1 - Fri, Jul 10
KEF
Keflavik Intl.
IAD
Washington Dulles Intl.
$632 Roundtrip, found 6 days ago
$632
Roundtrip
found 6 days ago
Select Icelandair flight, departing Wed, Jul 1 from Keflavik Intl. to Washington Dulles Intl., returning Fri, Jul 10, priced at $632 found 6 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.