Avro Lancastrian

Avro. A piston airliner.

Seats: Mixed 12
Range: 5,000 km
Cruise: 350 km/h
Payload: 2,800 kg
Take off run: 1,300 m
Fuel burn: 740 kg per block hour
Reference price: $120,000 in 1947 dollars
Production ends: 1946-12-31
Confidence: estimated (to be verified)

Source: Converted Lancaster bomber used by BOAC and by Skyways from 1946 (Wikipedia, Skyways (British airline), https://en.wikipedia.org/wiki/Skyways_(British_airline)). Seats, speed, range and price are estimates.