Our mailing address for payment of freight invoices has changed Please note that our mailing address for payment of freight invoices has changed effective immediately.

Our new Payment mailing address is:
Southwestern Motor Transport, Inc.
PO Box 4423, MSC# 500
Houston, Texas 77210

SMT Regional Operation Locations

Truckload Operations

Toll free: 800-531-5354
Local: 210-515-5501

Dallas Regional Customer
Service Center

Toll free: 800-232-1415
Local: 972-241-2266

Houston Regional Customer Service Center

Toll free: 800-992-2768
Local: 713-692-1093

San Antonio Customer

Toll free: 800-531-5354
Local: 210-515-5501

Laredo Regional Customer
Service Center

Toll free: 800-531-5355
Local: 956-722-7551

Austin Customer

Local: 512-272-8207
Local: 713-692-1093

El Paso Customer

Local: 915-772-9575

Harlingen Customer

Toll free: 800-323-4525
Local: 956-423-2135

Why Choose SMT?

  • 98% Company wide on-time service standard
  • Low Claim ratio less than 1/2 %
  • Responsive and Flexible to our customers needs
  • Financially stable – Dun & Bradstreet rated
  • EDI Capabilities
  • Optical Imaging System
  • Satellite/GPS tracking of over the road & city units

The diversity of freight that SMT has gives us steady loads year round.

Ship, Track and Manage

Quick, detailed tracking of the current status of your less-than-truckload shipment

Reliable Service

Present day operation that includes multi-state LTL coverage and network partners.

Reliable Service

From border to border with six thru-trailer entry ports into Mexico and thru-trailer service

Reliable Service

Wing Express Delivery gives our customers an option for their expedited ground & air deliveries

Reliable Service

Consolidation and distribution services have been a great help to many customers

Customer testimonials

A few of the nice things our customers have to say about SMT

Hands down, SMT is the best intra-tx carrier in our arsenal and it is always a pleasure working with them.
SMT's service, transit time, and pricing is accurate and consistent. The ability to speak directly to their dispatchers or managers provides a sense of reliability.
They allowed us to pick up our freight at the dock. It was fast and convenient. Everything was in great shape and the employees were so nice!

Contact us anytime: 210-661-6791   |