Seattle, WA SEA to Bangkok BKK Flights

The earliest flight from Seattle, WA to Bangkok leaves at 1: 10AM. Plan your trip with the Journey Planner   from Omio.

The latest flight from Seattle, WA to Bangkok leaves at 11: 30PM.

Since neither Seattle, WA nor Bangkok are in the Schengen Area, passport requirements depend on the specific immigration rules of USA and Thailand. Entry and visa requirements can be subject to change. For the latest information, check with your destination's embassy or consulate.

There is a time difference of 15 h in winter and 14 h in summer between Seattle, WA and Bangkok.

The best events to attend in Bangkok include:

• Songkran Festival, traditional Thai New Year celebration featuring water fights and cultural rituals
• Loy Krathong, festival of lights where people float decorated baskets on water
• Bangkok International Film Festival, showcasing international films and promoting film culture
• Bangkok Art Biennale, contemporary art exhibition featuring local and international artists across the city.

The best holidays to experience in Bangkok include:

• Chakri Memorial Day, commemorates the founding of the Chakri Dynasty with ceremonies and parades in April
• Visakha Bucha Day, celebrates the birth, enlightenment, and death of Buddha with religious observances in May
• Asalha Puja Day, marks the Buddha's first sermon and is observed with merit-making activities in July
• King Bhumibol Memorial Day, honors the late king with ceremonies and reflections on his legacy in October.

The best season to visit Bangkok is Cool season (November to February). The best weather to explore Bangkok is during November-February or March-May.

For international flights we recommend to arrive 2.5 to 3 hours before departure. Please check the website of your departure airport if in doubt. Some airports may offer booking time slots for security checks or offer additional information on when to get there based on time of day.

Most airlines permit carry-on bags that fit within specific dimensions (e. G. 22 x 14 x 9 inches or 56 x 36 x 23 cm), including handles and wheels. Bags must fit in the overhead bin or under the seat in front of you.

Many airlines impose weight limits, commonly ranging between 7 kg (15 lbs) and 12 kg (26 lbs).
Typically, passengers are allowed one carry-on bag and one personal item (for example a purse, laptop bag, or backpack). Personal items must fit under the seat in front of you.
Budget Airlines (like Ryanair or Wizz Air) have stricter size and weight limits, often requiring fees for larger carry-ons. Full-Service Airlines have more lenient policies, sometimes including more spacious dimensions or higher weight limits depending on your ticket class.

The list of items prohibited on an airplane varies by country and airline, but in general, the following items are not allowed in carry-on or checked baggage: Weapons and self-defence items, sharp objects, flammable materials, explosives, toxic substances, or liquids over 100ml (except for medications and baby essentials). In checked baggage, firearms (without authorization), explosives, large lithium batteries, and hazardous chemicals are prohibited. Electronic cigarettes must be in carry-on bags, while alcohol and dry ice have restrictions. Always check with your airline for specific regulations.