Icelandair Flight 521 Deals & Information (2026/2027)

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Icelandair Flight 521 Route Deals From $355

The cheapest prices found with in the last 7 days for return flights were $410 and $355 for one-way flights to Keflavik Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Dec 3 - Sun, Dec 6
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$410 Roundtrip, found 6 days ago
$410
Roundtrip
found 6 days ago
Select Icelandair flight, departing Thu, Dec 3 from Frankfurt Intl. to Keflavik Intl., returning Sun, Dec 6, priced at $410 found 6 days ago
Wed, Oct 28 - Fri, Nov 6
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$422 Roundtrip, found 2 days ago
$422
Roundtrip
found 2 days ago
Select Icelandair flight, departing Wed, Oct 28 from Frankfurt Intl. to Keflavik Intl., returning Fri, Nov 6, priced at $422 found 2 days ago
Sun, May 31 - Tue, Jun 9
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$438 Roundtrip, found 5 days ago
$438
Roundtrip
found 5 days ago
Select Icelandair flight, departing Sun, May 31 from Frankfurt Intl. to Keflavik Intl., returning Tue, Jun 9, priced at $438 found 5 days ago
Sun, Dec 13 - Fri, Dec 18
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$451 Roundtrip, found 6 days ago
$451
Roundtrip
found 6 days ago
Select Icelandair flight, departing Sun, Dec 13 from Frankfurt Intl. to Keflavik Intl., returning Fri, Dec 18, priced at $451 found 6 days ago
Sat, May 16 - Sat, May 23
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$453 Roundtrip, found 2 days ago
$453
Roundtrip
found 2 days ago
Select Icelandair flight, departing Sat, May 16 from Frankfurt Intl. to Keflavik Intl., returning Sat, May 23, priced at $453 found 2 days ago
Thu, Jun 18 - Mon, Jul 27
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$461 Roundtrip, found 5 days ago
$461
Roundtrip
found 5 days ago
Select Icelandair flight, departing Thu, Jun 18 from Frankfurt Intl. to Keflavik Intl., returning Mon, Jul 27, priced at $461 found 5 days ago
Sun, May 3 - Tue, May 12
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$464 Roundtrip, found 3 days ago
$464
Roundtrip
found 3 days ago
Select Icelandair flight, departing Sun, May 3 from Frankfurt Intl. to Keflavik Intl., returning Tue, May 12, priced at $464 found 3 days ago
Sun, May 17 - Sat, May 23
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$470 Roundtrip, found 6 hours ago
$470
Roundtrip
found 6 hours ago
Select Icelandair flight, departing Sun, May 17 from Frankfurt Intl. to Keflavik Intl., returning Sat, May 23, priced at $470 found 6 hours ago
Thu, Dec 24 - Sun, Dec 27
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$491 Roundtrip, found 3 hours ago
$491
Roundtrip
found 3 hours ago
Select Icelandair flight, departing Thu, Dec 24 from Frankfurt Intl. to Keflavik Intl., returning Sun, Dec 27, priced at $491 found 3 hours ago
Thu, Dec 24 - Sun, Dec 27
FRA
Frankfurt Intl.
KEF
Keflavik Intl.
$621 Roundtrip, found 3 hours ago
$621
Roundtrip
found 3 hours ago
Select Icelandair flight, departing Thu, Dec 24 from Frankfurt Intl. to Keflavik Intl., returning Sun, Dec 27, priced at $621 found 3 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.