MCC 3664 covers FLAG INN merchants, classified under airline. To maximize rewards at these businesses, look for credit cards with broad spending bonuses or airline category multipliers. MCC Lookup Tool to find which cards earn bonus rewards here.
Hotels like Marriott, Hilton, and Best Western use MCC 3664. Purchases for hotel stays, room service, and other on-site services are coded here.
Cardholders often think fuel purchases at hotels get coded as MCC 3664, but they're actually categorized under the fuel station MCC.
MCC 3664 stands for FLAG INN. It is a four-digit Merchant Category Code used by payment networks to classify businesses in the airline category.
Merchants classified under MCC 3664 (FLAG INN) operate in the airline sector. Card networks assign this code during merchant onboarding based on the primary business activity.
MCC 3664 (FLAG INN) is not currently a dedicated bonus category for most major credit cards. For airline spending at these merchants, a flat-rate rewards card (1.5–2% on all purchases) is typically your most reliable option. Use our MCC Lookup Tool to find the best card for any specific merchant.
Currently, no credit cards in our database have a dedicated bonus category for MCC 3664 (FLAG INN). Most purchases posting with this code will earn base rewards (typically 1–1.5x on everyday cards). A flat-rate cashback card is the most predictable choice for airline spending.
MCC 3664 is assigned to businesses providing flag inn services. While this is a less common merchant category, any purchase that posts with code 3664 will be classified as 'FLAG INN' by your card issuer, which determines whether airline category bonuses apply to that transaction.
MCC 3664 (FLAG INN) and MCC 3000 (UNITED AIRLINES) are both in the airline category but cover distinct merchant types. MCC 3664 is used for flag inn businesses, while MCC 3000 is assigned to united airlines merchants. Both may qualify for the same bonus category on your card — check your card's terms or use our MCC Lookup Tool to confirm.