If you have a problem with our online booking engine or have a question about your online reservation, please call
888-789-9887 or email OnPeak at flighthelp@onpeak.com.

This is a toll-free customer service support number and will direct you to a booking agent.

Allegiant flights can only be booked through the Allegiant website.

Search Allegiant Flights


  • Non-stop service to Orlando Sanford Airport (SFB).
  • Non-stop service to Tampa through Clearwater-St. Petersburg International Airport (PIE).
  • 1-702-505-8888
  • www.allegiantair.com
  • Non-stop daily service to Charlotte (CLT) through Charlotte Douglas International Airport
  • Non-stop service to Dallas (DFW) through Dallas/Fort Worth International Airport
  • 1-800-433-7300
  • www.aa.com
  • Non-stop daily service to Atlanta (ATL) through Hartsfield Jackson International Airport
  • 1-800-221-1212
  • www.delta.com

Airline Information

Tri-Cities Airport offers non-stop service to five hubs. With one connection you can get most anywhere in the United States and many destinations abroad. Each airline’s contact information is listed above or click on the airline name to visit each website. You can also follow TRI on FacebookTwitter, or Instagram for the latest airport news.