Kayak used to be a trustworthy site but not anymore! They send customers to unscrupulous partners, like Travelgenio, who take your money, give poor customer service (no way to reach them, they ignore your emails, etc.) and don't give people refunds or vouchers they are eligible for (among many other complaints many people have). Kayak sends unsuspecting customers to these shady sites and then walks away with commission. Use the airlines directly, not these unnecessary middlemen.