Icelandair Flight FI450 Deals & Information (2025/2026)

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Icelandair Flight 450 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 23 hours ago
$280
Roundtrip
found 23 hours ago
Select Icelandair flight, departing Sun, Oct 19 from Keflavik Intl. to Heathrow, returning Thu, Oct 30, priced at $280 found 23 hours ago
Sat, Oct 18 - Thu, Oct 30
KEF
Keflavik Intl.
LHR
Heathrow
$292 Roundtrip, found 23 hours ago
$292
Roundtrip
found 23 hours ago
Select Icelandair flight, departing Sat, Oct 18 from Keflavik Intl. to Heathrow, returning Thu, Oct 30, priced at $292 found 23 hours ago
Mon, Oct 6 - Sun, Oct 12
KEF
Keflavik Intl.
LHR
Heathrow
$302 Roundtrip, found 13 hours ago
$302
Roundtrip
found 13 hours ago
Select Icelandair flight, departing Mon, Oct 6 from Keflavik Intl. to Heathrow, returning Sun, Oct 12, priced at $302 found 13 hours ago
Mon, Oct 6 - Sun, Oct 12
KEF
Keflavik Intl.
LHR
Heathrow
$314 Roundtrip, found 13 hours ago
$314
Roundtrip
found 13 hours ago
Select Icelandair flight, departing Mon, Oct 6 from Keflavik Intl. to Heathrow, returning Sun, Oct 12, priced at $314 found 13 hours ago

Frequently asked questions

What route does flight number FI450 take?
Flight number FI450 takes around 3 hours and 15 minutes to jet directly from Reykjavík--Keflavík Airport to Heathrow Airport (LHR). Sure, there's magic in the destination, but half the fun is in the journey!
What kind of plane is on flight number FI450?
There's a good chance you'll be traveling aboard the Boeing 767-300 if you're on flight FI450. Generally, this flight leaves from Reykjavík--Keflavík Airport and comes in to land at London Airport (LHR-Heathrow).
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 FI450 flight with Travelocity, please visit our Customer Service Portal.