Reykjavik

Enroute from Reykjavik to Akureyri, while flying in marginal weather conditions east of the city of Siglufjörður, the aircraft hit the slope of Mt Hestfjall located on the west coast of the Héðinsfjörður Bay. The aircraft was totally destroyed and all 25 occupants were killed. Up to date, worst airplane crash in Iceland History.

While landing off Reykjavik, the single engine aircraft hit waves, overturned and sank. The crew fate remains unknown but the aircraft was lost.

The crew was completing a delivery flight from Canada to UK. On the last leg from Reykjavik to Prestwick, while cruising at an altitude of 4,000 feet east of the Isle of Arran, the crew informed ground that he was approaching Prestwick Airport. One minute later, the aircraft crashed into the Firth of Clyde, about four miles offshore. Some documents were found a day later on a beach but no trace of the aircraft nor the crew was ever found.
Crew:
F/Lt Hector Roy Hannaford 3.

The crew was performing a delivery flight from the Bluie West One Airport located in Narsarsuaq and Reykjavik, Iceland. Enroute, the twin engine aircraft crashed in unknown circumstances into the Atlantic Ocean some 100 km east of Greenland, at coordinates 63°18'00.0"N 38°00'00.0"W. No trace of the aircraft nor the crew was ever found.
Crew:
S/L Z. W. Hirsz, pilot,
P/O D. Washer, copilot,
F/Sgt W. R. Gregory, navigator,
F/Lt H. B. Clarke, wireless operator.

While approaching Scotland at an altitude of 2,300 feet in poor weather conditions (low clouds and snow falls), the aircraft hit the slope of Mt Ben Talaidh 200 feet from the summit. The captain and two passengers were killed.
Crew (45th Group):
F/O Frank Bishop, pilot, †
P/O Thomas Brown Milne Alexander, pilot,
W/O Gilbert Nichols, radio operator.
Passengers:
S/Ldr Derek Biden Auchinvole,
S/Ldr Archibald Alderton, †
F/O Herbert Ellis, †
F/Lt B. Miller,
F/Lt John Douglas Lumsden Gammie.
Source:
http://www.peakdistrictaircrashes.co.uk/pages/scotland/scotlandkk194.htm

The crew left Reykjavik on an anti-submarine patrol flight over the North Atlantic, and was scheduled to arrive at Wick Airport. On approach to Scotland, the crew encountered foggy conditions and the captain decided to divert to Stornoway. Shortly later, the seaplane hit a mountain on the Foula Island, off the Shetland archipelago. Seven crew members were killed while one occupant was seriously injured.
Crew (162nd Squadron):
WO2 Robert Densmore Harvey, †
F/S Elliott Courtney Watson,
WO2 John H. Knight, †
F/S Robert Wilford Ernest Townsend, †
F/O Abram Hildebrand, †
F/O Willis Hilson Lloyd, †
F/O George Gordon Bradshaw, †
P/O James Edwin Bowler. †
Source: http://www.canso11062.mikeharvey.ca/

During the take off run, the aircraft swung, veered off runway and collided with a truck. No casualties.

The seaplane left RAF Castle Archdale around 0500LT on a routine maritime patrol flight to Reykjavik, Iceland. Around 0915LT, the crew spotted the German U-Boat registered U-489 that was performing its first sortie from Kiel. The crew of the Sunderland completed four attacks when he was hit by enemy fire. The captain was forced to ditch the aircraft that sank within 5 minutes. Five crew members were killed while six others were rescued. The U-Boat was lost as well.
Crew (423rd Squadron):
F/O Harry Bertram Parliament,
Sgt Frank Ginger Hadcroft 9.

An undercarriage collapsed on landing at Reykjavik Airport. The aircraft slid on runway for several yards before coming to rest. While all occupants were unhurt, the aircraft was considered as damaged beyond repair.

After touchdown at Reykjavik Airport, the four-engine aircraft was unable to stop within the remaining distance. It overrun and came to rest. There were no casualties.