You can use Capital One Venture miles on almost any airline by either booking through the Capital One Travel portal or by transferring miles to over 15 travel partners at a 1:1 ratio. Key transfer partners include Air Canada (Aeroplan), British Airways, Avianca, Singapore Airlines, and Flying Blue (Air France-KLM). Because these partners belong to global alliances like Star Alliance, Oneworld, and SkyTeam, you can effectively use your miles to book flights on hundreds of secondary airlines, including United, American, and Delta. For example, transferring to Aeroplan allows you to book any Star Alliance partner. A few partners, such as Emirates and EVA Air, have a slightly lower transfer ratio (2:1.5), while JetBlue remains a popular domestic choice despite a 5:3 transfer rate.