I had an unpleasant experience booking domestic flights in Thailand through Opodo. I purchased a flexible ticket with Vietjet, but upon check-out, I discovered that the ticket had the wrong date. Opodo's customer service was unhelpful and instructed me to contact Vietjet directly. Unfortunately, I learned that changes to the ticket were only allowed within 60 days of purchase and no other modifications were permitted. Dealing with Opodo's customer service was frustrating, and I had to reach out to Vietjet on my own to request changes. In the end, I had to cancel the ticket without a refund and spent a significant amount of time resolving the issue. I would not recommend using Opodo for flight bookings.