T’way Air Rebrands to Trinity Airways: Impact on Tickets, Flight Numbers, and Counters

Impact on Booked Tickets and Flight Numbers | No Reissuance or Fees Required

Following the rebranding of T’way Air, many passengers were concerned about whether their existing tickets would remain valid or if rebooking fees would apply. In short, all tickets purchased prior to September 10, 2026, have been fully transferred to Trinity Airways without requiring any action from travelers.

Your passenger name record (PNR) and electronic ticket receipts remain completely valid. You do not need to perform additional procedures at airport counters or self-service kiosks. Rebooking fees and name change charges are exactly 0 yen. Even if your confirmation email or reservation portal displays “Trinity Airways,” your booking itinerary remains identical.

Furthermore, the airline identification codes—the 2-letter IATA code “TW” and 3-letter ICAO code “TWB”—are retained. For example, if you booked flight TW202 from Narita to Incheon, the flight number remains TW202 under Trinity Airways. Flight schedules and departure or arrival times have not changed due to the rebranding.

Terminal and Check-in Counter Locations at Major Airports

When heading to the airport, it is essential to verify your departure terminal and check-in counter. While the airline’s name has changed, terminal assignments at major Japanese airports and Seoul’s Incheon International Airport remain strictly unchanged.

Airport flight information display systems (FIDS) and check-in monitors are gradually transitioning from “T’way Air” to “Trinity Airways.” During this transition phase, some airport signage may display “Trinity Airways” while others retain “T’way.” When navigating the terminal, prioritize searching for your “TW” flight code (such as TW202) rather than the airline name to locate the correct check-in island without confusion.

At Incheon International Airport, Trinity Airways continues to operate from Passenger Terminal 1 (T1), not Terminal 2 (T2) where Korean Air and Delta Air Lines operate. Moving between T1 and T2 requires approximately 15 to 20 minutes via the free airport shuttle bus, so confirm your terminal before arrival.

Aircraft Livery and In-Flight Services | Transition to the SSC Model

The rebranding to Trinity Airways reflects an operational transformation under its parent company, Sono Trinity Group. The carrier is adopting a “Selective Service Carrier (SSC)” business model, positioning itself between traditional low-cost carriers (LCC) and full-service carriers (FSC).

On short-haul and medium-haul routes such as Japan-Korea services, Trinity Airways maintains affordable base fares. Meanwhile, on long-haul routes utilizing wide-body aircraft such as the Airbus A330, the airline plans to expand premium business class seating and enhanced cabin amenities.

Aircraft livery repainting will take place progressively. For an extended period, aircraft bearing the legacy red “T’way” livery will operate alongside aircraft featuring the new “Trinity” branding. If your flight is operated by an aircraft with T’way markings, it is a fully scheduled and legitimate flight. Seat pitch, cabin dimensions, and baggage allowance rules remain aligned with your original booking terms.

Short-Haul Flight Limitations and Considerations

While the brand refresh introduces the SSC concept, passengers on short-haul flights between Japan and Korea should keep realistic expectations. Services on these routes remain essentially consistent with budget carrier standards.

Complimentary meals, drinks, and personal seatback monitors are not provided on short routes, and checked baggage or seat selection remains subject to optional fees depending on your fare tier. Furthermore, in the event of significant weather disruptions or mechanical delays, alternative flight transfers to partner carriers are generally not offered. Travelers seeking comprehensive travel guarantees and full-service hospitality may find established full-service carriers more suitable. For travelers evaluating other budget carrier options across Korea routes, comparing terms with Jeju Air flight deals provides a helpful benchmark.

Mileage and the “t’way Plus” Loyalty Program

Points and memberships accumulated under T’way Air’s subscription program, “t’way Plus,” are being officially transferred to Trinity Airways.

Accumulated points, seat selection benefits, and priority boarding privileges transfer into Trinity Airways’ membership system at equivalent value. Passengers do not need to submit manual transfer requests. You can log into your account using your existing credentials on the updated website.

Promotions and discount coupons celebrating the brand launch are also available. For detailed promotional terms and coupon acquisition steps, see our coverage on Trinity Airways initial launch promotions. Additionally, when planning booking schedules to secure the most economical fares, referencing our guide on airfare pricing patterns by departure day versus booking day can help optimize total travel expenses.

Practical Airport Verification Steps

To ensure a smooth departure with Trinity Airways during the brand transition period, follow these sequential verification steps:

Pay close attention if you booked through an online travel agency (OTA). Some agencies may still show “T’way Air” while others show “Trinity Airways.” Either confirmation is valid for boarding. Airport announcements and digital signboards may use either name, so relying on your TW flight number remains the most dependable approach.

Source: Verification table above / Verified September 24, 2026