Airlines commonly serving the IND to OKC market include American Airlines (frequent connections via DFW), United Airlines (connections via ORD or IAH depending on routing), and Delta Air Lines (connections via ATL). Each carrier offers different balance of price, loyalty perks, and connection times: American often provides one-stop competitive fares through Dallas-Fort Worth, Delta provides smooth connections via Atlanta, and United can be competitive via Chicago. For October travel, check baggage fees, change policies, and loyalty benefits. Use direct searches for IND to OKC flights and compare total journey time plus ticket price to choose the best carrier for your needs. CTA: Compare carriers and book the best IND to OKC October fare now.