After five years of stalled negotiations, the largest airport megaproject in Thailand is finally vertical.

The THB 300 billion (roughly $9 billion) U-Tapao International Airport and Eastern Aviation City project officially broke ground on April 3, 2026 in Ban Chang district, Rayong province. The build is the cornerstone of Thailand’s Eastern Economic Corridor (EEC), a 30-year development plan to convert the country’s eastern seaboard into Southeast Asia’s logistics, manufacturing, and aerospace hub.

Project Scope

The development is a full third commercial airport for the Greater Bangkok area, supplementing Suvarnabhumi and Don Mueang. Phase 1 will deliver a new terminal building, expanded apron and taxiway system, a parallel runway (Runway 2), and the first commercial zones of the Eastern Aviation City — a 6,500-rai (roughly 2,600-acre) industrial and commercial precinct adjacent to the airport designed around MRO (maintenance, repair, overhaul), aerospace logistics, and free-zone commerce.

The contract structure is a public-private partnership. The EEC Office of Thailand signed the PPP agreement with U-Tapao International Aviation Company Limited — the BBS Joint Venture composed of Bangkok Airways, BTS Group Holdings, and Sino-Thai Engineering and Construction (STEC). BBS won the tender based on the highest projected returns to the State across the 50-year concession period.

Phase 1 delivery is split. The Royal Thai Navy retains responsibility for Runway 2 and the taxiway expansion, with civil works underway and a completion target of May 2028. The BBS consortium handles the terminal, commercial zones, and free-trade infrastructure, with phased openings starting late 2026 and full Phase 1 capacity targeted for 2030–2032.

The terminal is engineered for 12 million passengers per year in Phase 1, scaling to 60 million across subsequent phases. Eastern Aviation City commercial development begins late 2026 and is the piece the consortium has flagged as the highest-confidence revenue stream early in the concession — MRO facilities and bonded logistics buildings tend to commit before passenger traffic ramps.

Why It Matters

U-Tapao is one of the largest airport infrastructure programs in Southeast Asia and the single biggest investment in Thailand’s EEC roadmap. The five-year delay has been a recurring embarrassment for the Thai government — the original PPP was signed in June 2020 and stalled through legal challenges, financing disputes, and the post-COVID rethink of regional aviation demand.

The restart matters beyond Thailand. Vietnam’s Long Thanh International Airport, Singapore’s Changi Terminal 5, and Cambodia’s Techo International all hit major milestones in 2025 and 2026. Together they’re reshaping the air-traffic geography of the region. U-Tapao’s positioning as a freight, MRO, and secondary passenger hub gives Thailand a competitive answer to Vietnam’s Long Thanh and reinforces the country’s claim as the regional aerospace base.

For the construction industry, the project is a barometer of Thai PPP execution. After multiple high-profile delays (the Bangkok mass transit Pink Line and Yellow Line both ran over schedule and budget), the U-Tapao restart is being watched as a test of whether the EEC governance framework can deliver megaprojects without the agency drift that’s marked earlier programs.

First terminal opening is targeted for late 2028, with the full master plan rolling out through 2032 and the broader Eastern Aviation City precinct continuing to develop through the 2030s.

Project Team & Details