T’way Air will begin operating under the Trinity Airways name on September 10, 2026, establishing a firm date for the customer-facing phase of a rebranding process approved by shareholders earlier this year.
The airline confirmed the timing in an August 31 customer notice. The change will cover its website, mobile app and airport check-in counters, but it will not alter the carrier’s IATA designator, flight numbers or reservations.
Flights will therefore continue to use the TW code after September 10. Passengers with existing tickets will not need to rebook or have their documents reissued, and the airline said schedules and booking conditions will remain in place through the transition.
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Digital and Airport Branding Will Change Together
Trinity Airways will introduce its new website and app on the same day that airport counters adopt the new brand. T’way Air counters will remain in use through September 9, with Trinity Airways branding appearing from September 10. The airline said the physical counter locations are not being moved as part of the change, although passengers should continue to check airport flight information displays for operational counter assignments.
The main website will move from the existing T’way Air address to trinityairways.com. Account and membership information will transfer without action from customers, while T’way Plus subscriptions, coupons and other benefits will remain valid.
Several ancillary products will receive new names. The t’pet service will become TRINITY PET, while the t’way Gift Card will be renamed the Tria Gift Card. Previously issued gift cards will continue to work within their original validity periods, which can run for as long as five years.
The retention of the TW identifier is operationally significant. Keeping the code and flight-number structure limits changes across global distribution systems, interline processes, airport displays, travel agency records and government arrival forms. The airline is telling passengers to continue entering the TW flight number printed on their tickets when completing electronic immigration documents.
The Corporate Name Changed Earlier This Year
The September date separates the operational rebrand from the legal change already completed at the corporate level. Shareholders approved the name Trinity Airways Co., Ltd. at the airline’s annual meeting on March 31. The company’s announcement following the vote said the new identity would be introduced after domestic and international approval procedures.
The Korea Exchange subsequently changed the listed company’s name from T’way Air to Trinity Airways, with the revised listing taking effect April 16. Its exchange symbol changed from TWAY to TRN, although its securities identification and short stock code remained unchanged.
South Korea’s Ministry of Land, Infrastructure and Transport issued an amended aviation license under the Trinity Airways name on May 15. According to the airline’s May 18 regulatory update, the approval required measures to prevent customer confusion, maintain the existing safety system and complete the necessary authorizations in overseas markets.
At that stage, T’way Air had not set an operational conversion date because foreign approvals were still being processed. The August 31 notice replaces that open-ended timetable with a coordinated September 10 launch across the airline’s sales, airport and customer-service channels.
The rebrand follows a change in control at the airline. Sono International became T’way Air’s largest shareholder in 2025 after acquiring interests connected to the carrier’s former controlling shareholder and participating in subsequent capital increases. A Korea Exchange filing recorded Sono International as the new largest shareholder effective August 29, 2025.
Aircraft Will Carry Both Identities During the Transition
The airline does not plan to repaint its entire fleet before the operational launch. Aircraft will receive Trinity Airways branding progressively from September, meaning the T’way Air name and livery will remain visible after the website, app and airport presentation have switched.
That is a substantial undertaking for a fleet that has grown quickly and become more varied. The company reported 48 aircraft at March 31, 2026: 28 Boeing 737-800s, seven Boeing 737 MAX 8s, six Airbus A330-200s, five Airbus A330-300s and two Boeing 777-300ERs. The narrowbodies support the airline’s domestic and regional network, while the A330 and 777 fleets underpin its expansion into long-haul markets.
The repainting program also coincides with a broader fleet transition. In its first-quarter regulatory report, the airline outlined plans to introduce 16 aircraft during 2026, including additional Boeing 737 MAX 8s and six Airbus A330-900s.
The A330-900s are intended to replace the smaller A330-200 fleet. Trinity Airways expects the new type to provide approximately 37% more seats while reducing fuel consumption per seat by about 14%. The airline is also replacing Boeing 737-800s with MAX 8s, which it expects to deliver an approximately 17% improvement in fuel efficiency.
Those changes make the rebrand more than a repainting exercise. Trinity Airways will launch as the public identity of a carrier operating a mixed narrowbody and widebody fleet, with a network and cost structure that have moved beyond the traditional short-haul South Korean low-cost model.
Bottom Line
Retaining the TW code gives Trinity Airways continuity where it matters most operationally. Reservations, schedules and flight numbers can pass through the change without a large-scale migration across distribution and airport systems, while the airline concentrates the visible conversion into a single date. For passengers and travel sellers, September 10 should function primarily as a change of name rather than a change of operating carrier.
The larger significance lies in what the new identity is being attached to. Sono International is putting distance between the airline and its previous ownership era just as the business expands its widebody operation and prepares to add the Airbus A330-900. Trinity Airways will therefore enter the market as the brand for a larger and increasingly long-haul airline, not simply as a replacement logo for the T’way Air that built its position with Boeing 737 operations.
Execution will now be the test. The first weeks will involve old and new liveries operating side by side, while airports, sales channels and customer documents adopt the Trinity Airways name. The first repainted aircraft, the launch of the new digital platforms and the arrival of the A330-900 fleet will show how quickly the airline can turn the September 10 name change into a coherent new operating identity.
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