Are there nonstop flights from Washington (DCA) to Bangkok (BKK)?

No. The fastest connection is via Los Angeles, about 21h of total flying time.

What is the fastest connection from Washington (DCA) to Bangkok (BKK)?

via Los Angeles ≈ 21h (estimated flying time, excluding layovers).

Ronald Reagan Washington National Airport (DCA) to Suvarnabhumi Airport (BKK)・14,169 km

No nonstop flights. The fastest connection is via Los Angeles (LAX), about 21h of flying time (layover not included).

None.

1 one-stop options, sorted by estimated flying time. Tap one to see the airlines on each leg and booking links.

Times are estimated from distance. Check schedules, frequency and availability with the airline or a booking site.