It is more cost-effective for a three-year-old child to buy a plane ticket, depending on the time period of travel. If it is a holiday or something, it is generally more cost-effective to buy a child ticket, because the price of a child ticket is much lower than that of an adult ticket at this time.
The price of children's tickets is 50% of the full price of adult tickets on the same flight. However, if you travel on certain working days, the price of children's tickets may be more expensive than that of adults. In this case, don't buy children's tickets for three-year-olds; You can buy special adult tickets directly.
Nowadays, many airlines will launch some discount activities in the off-season of transportation, and even some airlines will directly give a 30% discount, which will be more cost-effective than buying children's tickets. In other words, discount tickets for adults are cheaper than those for children, so it is certainly cost-effective for children to buy discount tickets for adults.
If you buy a discounted adult ticket for your child, you must pay attention to the details of the child or call. Because some airlines have certain flights, there are requirements for the number of children, which cannot exceed a certain number, so it is necessary to explain in advance.