Del Bajío International Airport (Aeropuerto Internacional de Guanajuato) BJX / MMLO

Swissport de México operates a ground handling station at BJX with an office at Carr. Silao-León Km 5.5, Col. Nuevo México, Silao, Guanajuato, per Swissport's official station network page (swissport.com/en/network/north-america/mexico/bjx).

Menzies Aviation provides front-line above- and below-wing ground services, including meet & assist and narrow-body aircraft handling, at Guanajuato/BJX per its official network page, with station managers Raul Olivares and Abraham Granados listed at Carretera Silao-León Km 5.5, Col. Nuevo México, León, Gto.

ASA holds federal storage permit PL/9801/ALM/AE/2015 (granted by the Comisión Reguladora de Energía) to store and sell Turbosina (Jet A-1) and Gasavión (Avgas 100LL) at the Bajío fuel station, Carretera Silao-León Km 5.5, adjacent to BJX; confirmed via ASA's official combustibles/gob.mx documentation.

Directory listings (AC-U-KWIK) show "Fly Across FBO" offering fuel, pilot and aircraft services at MMLO/BJX; however the operator's AFAC aeronautical-workshop permit (No. 453) registers its base explicitly as Toluca (TLC), not BJX, so a genuine dedicated physical presence at BJX beyond the directory listing remains unconfirmed.

Viva Aerobus's AFAC-registered aeronautical workshop permit (No. 348) explicitly lists BJX among its Estaciones Nacionales (alongside CUN, MEX, NLU, TIJ, CUU, TLC, MID), confirming the carrier self-performs line maintenance on its own fleet at this airport.

Siasa Air Interior Services is an AFAC-registered aeronautical workshop (permit No. 417) with its Base field explicitly listed as BJX, located at José María Ruiz No. 223, Col. Las Trojes, León, Gto., specializing in aircraft cabin interior repair and refurbishment.

Umagic América (Ultramagic) holds AFAC aeronautical-workshop permit No. 544 with its Base field explicitly listed as BJX, at Blvd. San Juan Bosco #4751-D, León, Gto.; given the Ultramagic brand's hot-air-balloon/aerostat focus, scope of service likely does not extend to fixed-wing aircraft maintenance despite the confirmed BJX-based registration.

Interiors / cabin / seat shop — manufacture and restoration of aircraft seat leather/synthetic dress covers and cabin interior products (design, refurbishment, recertification); based in Leon, Guanajuato (BJX metro area), Mexico, also known as Siasa Air / Siasa Air Aircraft Interiors. Holds FAA repair station certificate #I38Y105C plus Mexican DGAC/AFAC aeronautical-workshop approval; specific FAA class ratings and AFAC permiso registry number are unconfirmed via public lookup (class rating unconfirmed) — treat cited Accessory/Airframe-Limited ratings as unverified. Work stated to meet FAR 25.853 flammability standard. Exact facility street address could not be independently confirmed (sources show conflicting addresses within Leon).

Universal Aviation's official Leon/MMLO page names Air Culinaire Worldwide as its preferred catering partner for business aviation flights at BJX, with an order-through link on that page.

Air Culinaire Worldwide is named as the in-flight catering provider for BJX/León business aviation flights by Universal Aviation's official station page; Air Culinaire's own site lists 1,200+ served airports globally but does not itself enumerate BJX among named locations, so this is corroborated only via the partner reference.

GAP is the federally-concessioned operator of Aeropuerto Internacional del Bajío (BJX/MMLO), confirmed via GAP's own airport page and Wikipedia's airport infobox, responsible for terminal operations, gate/apron coordination and airside infrastructure. Contracted ramp handling is subcontracted to firms such as Swissport and Menzies rather than performed directly by GAP.

Universal Aviation coordinates third-party ground handling, permits and airport-relations support for business aviation at BJX through its Mexico FBO services office rather than a dedicated physical station on the field, per its own Leon/MMLO location page; Hinna Garcia is listed as the covering account manager for Latin America/Caribbean.