Niko Sigur and Tani Oluwaseyi struck in the first half for the hosts, while Promise Akinpelu and Nathan Saliba added late goals to complete the rout.
With the win, Canada take an early lead in Group B. The group’s other match earlier in the day saw Curacao and El Salvador play out a goaless draw in San Jose, California.
Sigur opened the scoring in the 27th minute, netting his first international goal after a smooth one-two exchange with Jonathan David inside the box.
Oluwaseyi made it 2-0 in first-half stoppage time, smashing home a left-footed shot from six yards out after receiving a pass from Richie Laryea.Buchanan added two goals in the 48th and 65th minutes, before Akinpelu (75’) and Saliba (90’) put the game well out of reach.Canada will next face Curacao on Saturday in Houston, while Honduras takes on El Salvador later that day at the same venue.