Icelandair Flight 521 Deals & Information (2026/2027)

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Icelandair Flight 521 Route Deals From $353

The cheapest prices found with in the last 7 days for return flights were $379 and $353 for one-way flights to Keflavik Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Apr 7 - Fri, Apr 17
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$379 Roundtrip, found 5 days ago
$379
Roundtrip
found 5 days ago
Select Icelandair flight, departing Tue, Apr 7 from Frankfurt Intl. to Keflavik Intl., returning Fri, Apr 17, priced at $379 found 5 days ago
Fri, Feb 12 - Fri, Feb 19
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$410 Roundtrip, found 4 days ago
$410
Roundtrip
found 4 days ago
Select Icelandair flight, departing Fri, Feb 12 from Frankfurt Intl. to Keflavik Intl., returning Fri, Feb 19, priced at $410 found 4 days ago
Tue, Apr 7 - Wed, Apr 15
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$433 Roundtrip, found 5 days ago
$433
Roundtrip
found 5 days ago
Select Icelandair flight, departing Tue, Apr 7 from Frankfurt Intl. to Keflavik Intl., returning Wed, Apr 15, priced at $433 found 5 days ago
Tue, May 19 - Tue, Jun 2
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$438 Roundtrip, found 6 days ago
$438
Roundtrip
found 6 days ago
Select Icelandair flight, departing Tue, May 19 from Frankfurt Intl. to Keflavik Intl., returning Tue, Jun 2, priced at $438 found 6 days ago
Thu, Apr 9 - Sat, Apr 18
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$442 Roundtrip, found 3 days ago
$442
Roundtrip
found 3 days ago
Select Icelandair flight, departing Thu, Apr 9 from Frankfurt Intl. to Keflavik Intl., returning Sat, Apr 18, priced at $442 found 3 days ago
Thu, Apr 9 - Sat, Apr 18
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$473 Roundtrip, found 3 days ago
$473
Roundtrip
found 3 days ago
Select Icelandair flight, departing Thu, Apr 9 from Frankfurt Intl. to Keflavik Intl., returning Sat, Apr 18, priced at $473 found 3 days ago
Fri, May 8 - Mon, May 11
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$519 Roundtrip, found 3 days ago
$519
Roundtrip
found 3 days ago
Select Icelandair flight, departing Fri, May 8 from Frankfurt Intl. to Keflavik Intl., returning Mon, May 11, priced at $519 found 3 days 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.