Icelandair Flight FI454 Deals & Information (2025/2026)

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Icelandair Flight 454 Route Deals From $244

The cheapest prices found with in the last 7 days for return flights were $280 and $244 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Oct 19 - Thu, Oct 30
KEF
Keflavik Intl.
LHR
Heathrow
$280 Roundtrip, found 1 day ago
$280
Roundtrip
found 1 day ago
Select Icelandair flight, departing Sun, Oct 19 from Keflavik Intl. to Heathrow, returning Thu, Oct 30, priced at $280 found 1 day ago
Sat, Oct 18 - Thu, Oct 30
KEF
Keflavik Intl.
LHR
Heathrow
$292 Roundtrip, found 1 day ago
$292
Roundtrip
found 1 day ago
Select Icelandair flight, departing Sat, Oct 18 from Keflavik Intl. to Heathrow, returning Thu, Oct 30, priced at $292 found 1 day ago
Mon, Oct 6 - Sun, Oct 12
KEF
Keflavik Intl.
LHR
Heathrow
$302 Roundtrip, found 16 hours ago
$302
Roundtrip
found 16 hours ago
Select Icelandair flight, departing Mon, Oct 6 from Keflavik Intl. to Heathrow, returning Sun, Oct 12, priced at $302 found 16 hours ago

Frequently asked questions

What route does flight number FI454 take?
You'll be landing into Heathrow Airport (LHR) from KEF if you're traveling on flight number FI454. You'll be in the sky for 3 hours and 10 minutes during this trip. It's also good to note that the flight conveniently travels direct.
How often is FI454 on time?
Icelandair flight number FI454 between Reykjavík--Keflavík Airport and London Airport (LHR-Heathrow) leaves as scheduled 93% of the time --- so you can be confident you will reach your destination ASAP. If the journey happens to be late, you can expect a wait time of around 41 minutes. This route has a star rating of 2.95.
What kind of plane is on flight number FI454?
The route for FI454 is almost always KEF to LHR, and the Boeing 757-200 is the aircraft model you'll probably be heading off 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 FI454 flight with Travelocity, please visit our Customer Service Portal.