As a leisure airline, Transavia has a far more flexible schedule. Tuesday and Sunday are the only 2 days where the HV flight is scheduled at the same time. On 4 days of the week, the flight departs around midday; on the other 3 days of the week, it's scheduled to depart in the late afternoon or evening.


But as the previous poster pointed out, that's to overlook my point - KLM has its own 3 daily flights, and it also offers many routings via Paris if you search for OPO to HEL flights. I have assumed that you bought the ticket directly from KLM but perhaps you didn't; if you search for your route on the KLM website or app, it is certainly not the case that your only option for an OPO-HEL booking is that you must fly Transavia.

In the example below, the option involving Transavia (highlighted in red) is the 6th most expensive of the 10 presented options