Vietnam Airlines plans to make the following frequency reductions (Routes Online, 19-Feb-2020):
- Nha Trang-Seoul Incheon: From daily to 3-4 times weekly from 17-Feb-2020 to 20-Mar-2020;
- Da Nang-Bangkok Suvarnabhumi: From daily to 5-6 times weekly from 26-Feb-2020 to 13-Mar-2020;
- Da Nang-Seoul Incheon: From daily to 3-5 times weekly from 10-Feb-2020 to 19-Mar-2020;
- Hanoi-Bangkok Suvarnabhumi: From three times daily to twice daily from 17-Feb-2020 to 28-Mar-2020, except 12-Mar-2020;
- Hanoi-Luang Prabang-Siem Reap: From five times weekly to 3-4 times weekly from 25-Feb-2020 to 28-Mar-2020;
- Hanoi-Busan: A321 replaces Boeing 787-9 daily from 17-Feb-2020 to 29-Feb-2020 and on four of seven weekly frequencies from 02-Mar-2020 to 09-Mar-2020 and 14-Mar-2020 to 20-Mar-2020;
- Hanoi-Singapore: From twice daily to daily from 17-Feb-2020 to 28-Mar-2020;
- Ho Chi Minh City:
- Yangon: From daily to four times weekly from 17-Feb-2020 to 28-Mar-2020.
- Bangkok Suvarnabhumi: From three times daily to twice daily from 17-Feb-2020 to 28-Mar-2020;
- Jakarta: From daily to five times weekly from 17-Feb-2020 to 28-Mar-2020;
- Phuket: From four to three times weekly from 14-Feb-2020 to 11-Mar-2020;
- Singapore: From three times daily to 1-2 times daily from 17-Feb-2020 to 28-Mar-2020.