IDAHO FALLS, Idaho — Teton Stage Lines, a nearly 90-year-old transportation company based in eastern Idaho, has joined the International Motorcoach Group as a shareholder member, expanding the organization’s presence in the Mountain West.
The addition strengthens IMG’s network across the western United States, particularly in Idaho, Wyoming and Utah, regions long served by Teton Stage Lines. The company has operated continuously for almost nine decades, providing charter, motorcoach, and black car transportation.

Teton Stage Lines’ diverse fleet includes modern motorcoaches and luxury vehicles, supported by an in-house maintenance facility.
Owner Donavan Harrington said joining IMG is a milestone for the family-owned business.
“We’re excited that Teton Stage Lines has been accepted as a member of the International Motorcoach Group — one of the most respected and selective organizations in the transportation industry,” Harrington said. “This is a validation of decades of doing things the right way — safely, professionally, and with care for the people we serve.”

IMG is an invitation-only network of independently owned motorcoach operators across North America. Prospective shareholder members are selected on the basis of safety performance, operational standards and customer service.
IMG President Phelps Hope said Teton Stage Lines’ history and regional reputation made it a strong addition.
“We are proud to welcome Donavan and Jackie Harrington, Nathan Harrington, and the entire Teton Stage Lines team into the International Motorcoach Group,” Hope said. “Their nearly 90-year history, deep regional roots, and commitment to safety and service reflect the values IMG looks for in a shareholder member. Their presence strengthens our network across the Mountain West and beyond.”