In the notes to "The Right of the Line" by John Terraine there is a table of the chance of survival rates for different aircraft roles which was produced by the Air Member for Training on 16 Nov 1942.
Role Percentage chance of Survival
One Tour Two Tours
Heavy and Medium Bombers 44 19.5
Light Bomber 25.5 6.5
Day Fighter 43 18.5
Night Fighter 39 15
Long Range Fighter 59.5 35.5
Torpedo Bomber 17.5 3
Sunderland Flying Boat 66 43.5
Catalina Flying Boat 77.5 60
Fighter Reconnaissance 31 9.5
Bomber Reconnaissance 42 17.5
The most hazardous role, Torpedo Bomber, was a Coastal Command role, although Flying Boat anti submarine patrol was comparatively safer than most other roles. Of course, the table may have looked much different if compiled in late 1944, although the Coastal Command Strike Wings - low level attacks against heavily defended targets in daylight over the sea - continued to suffer high loss rates.
Coastal Command Crews were awarded the Atlantic Star. In some cases, personnel also qualified for the Arctic Star.