The Transport Ministry is engaged in a pilot project to collaborate with Singapore's Changi Airport in exchanging flight management information.
The ministry is also considering working with Hong Kong International Airport in the same field.
The arrangement with the Singapore airport began about two months ago, Deputy Transport Minister Prin Suwannathat said on Thursday.
It is aimed at improving the efficiency of Suvarnabhumi airport's flight management system, he said.
He hopes the cooperation between the airports will help improve facilities at not only Suvarnabhumi but also at Changi.
Gen Prin said efforts to ease heavy air traffic at Suvarnabhumi were boosted after the Royal Thai Air Force (RTAF) agreed to free up more time for commercial flights to use air space.
The air space was normally reserved for RTAF's training facility in Nakhon Pathom's Kamphaeng Saen district.
This has allowed more room for commercial flights to pass through the area toward European destinations, he said.
As a result, the number of flights landing at and departing from Suvarnabhumi has risen from about 500-600 a day to about 900-920 a day, he said.
The RTAF's cooperation on this issue has allowed more flights to land at and depart from Don Mueang airport as well, Gen Prin said.