If you're flying with Thai Airways, it’s important to know how early you can check in to avoid delays and ensure a smooth travel experience. Thai Airways provides both online check-in and airport counter check-in, giving passengers flexibility based on their preferences. Online check-in for Thai Airways opens 24 to 48 hours before the flight’s scheduled departure time, depending on the route and airport. This service is available through the official Thai Airways website and mobile app, making it convenient for travelers to check in from home or on the go. Online check-in allows you to confirm your booking, select or change your seat, and receive your boarding pass electronically. If you're traveling with only carry-on luggage, checking in online lets you bypass the check-in counter and head straight to security. If you have checked baggage, you can still check in online and drop off your luggage at the airport bag-drop counter, which typically opens 3 hours before departure. For those who prefer checking in at the airport, Thai Airways check-in counters usually open 3 hours before international flights and 2 hours before domestic flights. The counters close about 1 hour before international departures and 45 minutes before domestic ones, so it’s best to arrive early, especially during peak hours. Thai Airways also offers priority check-in lanes for Royal Silk Class (Business Class) passengers and Royal Orchid Plus Gold or Platinum members, helping to speed up the process for premium and frequent travelers. In major airports like Suvarnabhumi Airport in Bangkok, Thai Airways provides clear signage and well-organized counters, making it easy to find the right check-in area. Passengers needing special assistance, those traveling with infants, or those carrying oversized baggage are advised to arrive even earlier to allow time for additional services. For passengers flying on codeshare flights operated by other airlines, the check-in process may follow the operating carrier’s policy, so checking details in advance is important. Thai Airways recommends passengers complete check-in early to allow enough time for baggage drop, security screening, immigration, and reaching the boarding gate before final call. Most boarding gates close 20 to 30 minutes before departure, and passengers who miss check-in or arrive late may be denied boarding. Checking in early also gives travelers more time to relax, shop, or dine before the flight. In summary, Thai Airways check-in opens online 24 to 48 hours before departure, while airport counters open 3 hours before international flights and 2 hours before domestic ones. Whether you're flying short-haul or long-haul, checking in early ensures you have enough time to complete all formalities and enjoy a stress-free start to your journey. Using Thai Airways' early check-in options is one of the best ways to make your travel smooth, comfortable, and on time.