The performance of Eurowings' Thailand-Germany sector so far has shown that the long-haul low-cost carrier business concept works.
The Lufthansa Group's subsidiary reported satisfactory performance against critics' suggestions otherwise.
"We are very satisfied with the routes' performance not only on the passenger side but also for the cargo business," Dirk Grossmann, general manager for Lufthansa Group in Thailand and the Mekong region, told the Bangkok Post.
Since the debut of the Bangkok–Cologne and Phuket–Cologne routes in December last year, the airline has been enjoying a very high seat load on both, he said, but declined to provide figures.
The impressive performance led Euro-wings to confirm its plan to boost the frequencies on the Phuket-Cologne sector to three flights a week, starting on Oct 30.
Eurowings now offers two weekly non-stop flights each on both two routes, using Airbus 300-200 wide-body jets.
Mr Grossmann said the majority of passengers originate from Europe but the airline also sees a constantly growing share of customers from Thailand.
"It will take some time [to attract passenger volumes from Thailand] but awareness among price-sensitive local and expat customers is gradually rising through all channels," the German executive said.
Most of Eurowings' tickets are sold via the internet but the airline is also getting good feedback from travel agents and corporate clients.
"Beyond seasonal or market driven adjustments of frequencies, we do not have any further expansion plans for Thailand so far," he added.
Towards the month-end, airlines under the Lufthansa Group will boost seat capacity for flights through Thailand by 22%. The increase is a response to higher demand in the six-month winter season programme.
Such an increase comes on the group's expectations of boosting its passenger volume in the period by 5%.
The group's four network airlines which operate flights through Thailand -- Lufthansa, Swiss, Austrian and Eurowings -- as well as Edelweiss, its associated leisure airline, will offer 29 flights a week in the winter season, up from 25 currently.