Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Edmonton to Yorkshire as you normally would.
YEG and LBA are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. YEG to LBA refers to a flight route from Edmonton Airport to Leeds/Bradford Airport. Doncaster Sheffield Airport (DSA), Doncaster Sheffield Airport (SZD), Harrogate Linton-On-Ouse Airport (HRT) are other airports near this flight route and their unique identifiers/IATA codes.