Icelandair Flight 450 Deals & Information (2026/2027)

Wander Wisely with exceptional service, 24/7 supportOpens in a new window

Feel at ease with free flight cancellations within 24 hours of booking

Change your flight without a fee on select flights

Icelandair Flight 450 Route Deals From $135

The cheapest prices found with in the last 7 days for return flights were $249 and $135 for one-way flights to Heathrow for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Dec 11 - Sun, Dec 13
KEF
Keflavik Intl.
LHR
Heathrow
$249 Roundtrip, found 1 day ago
$249
Roundtrip
found 1 day ago
Select Icelandair flight, departing Fri, Dec 11 from Keflavik Intl. to Heathrow, returning Sun, Dec 13, priced at $249 found 1 day ago
Fri, Dec 11 - Sun, Dec 13
KEF
Keflavik Intl.
LHR
Heathrow
$258 Roundtrip, found 1 day ago
$258
Roundtrip
found 1 day ago
Select Icelandair flight, departing Fri, Dec 11 from Keflavik Intl. to Heathrow, returning Sun, Dec 13, priced at $258 found 1 day ago
Wed, Dec 9 - Fri, Jan 8
KEF
Keflavik Intl.
LHR
Heathrow
$272 Roundtrip, found 1 day ago
$272
Roundtrip
found 1 day ago
Select Icelandair flight, departing Wed, Dec 9 from Keflavik Intl. to Heathrow, returning Fri, Jan 8, priced at $272 found 1 day ago
Thu, Jan 14 - Sun, Jan 17
KEF
Keflavik Intl.
LHR
Heathrow
$278 Roundtrip, found 4 hours ago
$278
Roundtrip
found 4 hours ago
Select Icelandair flight, departing Thu, Jan 14 from Keflavik Intl. to Heathrow, returning Sun, Jan 17, priced at $278 found 4 hours ago
Mon, Jan 4 - Sun, Jan 10
KEF
Keflavik Intl.
LHR
Heathrow
$280 Roundtrip, found 1 day ago
$280
Roundtrip
found 1 day ago
Select Icelandair flight, departing Mon, Jan 4 from Keflavik Intl. to Heathrow, returning Sun, Jan 10, priced at $280 found 1 day ago
Sat, Dec 5 - Fri, Dec 11
KEF
Keflavik Intl.
LHR
Heathrow
$284 Roundtrip, found 18 hours ago
$284
Roundtrip
found 18 hours ago
Select Icelandair flight, departing Sat, Dec 5 from Keflavik Intl. to Heathrow, returning Fri, Dec 11, priced at $284 found 18 hours ago
Thu, Jan 14 - Sun, Jan 17
KEF
Keflavik Intl.
LHR
Heathrow
$286 Roundtrip, found 4 hours ago
$286
Roundtrip
found 4 hours ago
Select Icelandair flight, departing Thu, Jan 14 from Keflavik Intl. to Heathrow, returning Sun, Jan 17, priced at $286 found 4 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.