Icelandair Flight 521 Deals & Information (2026/2027)

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Icelandair Flight 521 Route Deals From $347

The cheapest prices found with in the last 7 days for return flights were $290 and $347 for one-way flights to Keflavik Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Feb 6 - Sun, Feb 8
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$290 Roundtrip, found 3 hours ago
$290
Roundtrip
found 3 hours ago
Select Icelandair flight, departing Fri, Feb 6 from Frankfurt Intl. to Keflavik Intl., returning Sun, Feb 8, priced at $290 found 3 hours ago
Fri, May 22 - Mon, May 25
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$305 Roundtrip, found 2 days ago
$305
Roundtrip
found 2 days ago
Select Icelandair flight, departing Fri, May 22 from Frankfurt Intl. to Keflavik Intl., returning Mon, May 25, priced at $305 found 2 days ago
Sun, Feb 1 - Sat, Feb 7
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$366 Roundtrip, found 23 hours ago
$366
Roundtrip
found 23 hours ago
Select Icelandair flight, departing Sun, Feb 1 from Frankfurt Intl. to Keflavik Intl., returning Sat, Feb 7, priced at $366 found 23 hours ago
Thu, Jan 29 - Sun, Feb 1
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$389 Roundtrip, found 10 hours ago
$389
Roundtrip
found 10 hours ago
Select Icelandair flight, departing Thu, Jan 29 from Frankfurt Intl. to Keflavik Intl., returning Sun, Feb 1, priced at $389 found 10 hours ago

Frequently asked questions

What route does flight number FI521 take?
You'll be touching down at Keflavik Intl. Airport (KEF) from FRA if you're traveling on flight number FI521. You'll be in the sky for 3 hours and 35 minutes on this trip. What's more, the flight conveniently travels non-stop.
How often is FI521 on time?
About 100% of FI521 flights head off on time — so if you're flying between Frankfurt am Main Airport and Keflavik Intl. Airport (KEF), you can kick back knowing that you will get where you need to as quickly as possible. In the rare event that your Icelandair trip encounters a delay, the average wait is about 7 minutes. Thanks to the airline's first-rate service, this route has a star rating of 4.
What terminal does FI521 fly out of?
You'll likely be climbing aboard the plane at Terminal 2 if you're flying on FI521 direct from Frankfurt Intl. Airport (FRA) to Reykjavík–Keflavík Airport.
What kind of plane is on flight number FI521?
The route for flight number FI521 is nearly always Frankfurt Intl. Airport (FRA) to Reykjavík–Keflavík Airport, and the Boeing 767-300 is the type of plane you're likely to be flying with.
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 FI521 flight with Travelocity, please visit our Customer Service Portal.