Don Mueang and Phuket airports are among those in Asia-Pacific and the Middle East that showed the biggest gains in passenger traffic in the first quarter of this year.
Don Mueang in Bangkok increased its passenger volume by 23.1% to record 8.85 million, according to figures compiled by Airports of Thailand Plc.
Phuket increased its passenger throughput by 18.7% to 4.26 million.
Expansion at Don Mueang is expected to take its capacity to 40 million passengers a year by 2012.
Other top performers monitored by Airports Council International (ACI) were South Korea's Busan with 26% passenger growth, Kaohsiung in Taiwan (21%) and Doha in Qatar (20.4%).
The growth rates registered at both Thai airports mirrored strong travel demand through the cities they serve as well as congestion that has forced them to operate beyond their capacities.
ACI reported that passengers travelling through Asia-Pacific and Middle Eastern airports (574 airports in 48 countries) in the first quarter grew by 9.7% and 10.2% respectively, helped by the leap year's extra day in February.
Strong economic growth in India stimulated domestic travel, resulting in its major airports all posting strong increases: Delhi 22.9%, Mumbai 10.5%, Bengaluru 21.1%, Chennai 11.9% and Hyderabad 17.5%.
In Singapore, fuelled by robust growth in passenger traffic from Thailand, China and Malaysia, the airport recorded a gain of 9.9% and appeared to have regained confidence after a period of relatively slow growth since 2014, ACI said.
In terms of air freight volume, the results for the quarter were mixed: Asia-Pacific showed a decline of 1% compared with the Middle East's growth of 4.4%.
In Asia-Pacific, growth was affected by disruption at US West Coast ports that caused a distortive boost to air freight volume in February. This resulted in many Asia-Pacific freight hubs suffering a decline from last year: Hong Kong -3.5%, Incheon -4.4% and Narita -10.2%.
However, some airports delivered significant growth, with Delhi up 15.7% and Manila up 18.2%.
Growth in the Middle East was moderate. While Dubai grew 3.5%, Dubai World Central and Abu Dhabi suffered declines of 6.9% and 4.4%, respectively. The exception was Doha, where growth was the highest at 20.3%.