Shepler's Mackinac Island Ferry
- Ferry service to and from Mackinac Island. Ticket information, lighthouse cruises, and package deals.
- http://www.sheplersferry.com/

Arnold Mackinac Island Ferry Service
- Offers a catamaran ride from St. Ignace or Mackinaw City to Mackinac Island. Also offering cruises, group packages and freight service. Schedule, rates, and information.
- http://www.arnoldline.com/

Plaunt Transportation, Inc.
- Offers ferry service from Cheboygan to Bois Blanc Island, includes schedule and rates.
- http://www.bbiferry.com/

Mackinac County Airport 83D
- Complete aeronautical information including location, runways, taxiways, navaids, radio frequencies, FBO information, fuel prices,weather, aerial photo, and airport diagram.
- http://www.airnav.com/airport/83D

Mackinac Bridge
- Features fare updates, live webcams, photo albums and historical background about the bridge, which connects the upper and lower peninsulas of Michigan.
- http://www.mackinacbridge.org/