MCC 3139 covers AIRLINES 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.
Delta Airlines, American Airlines, and Southwest Airlines use MCC 3139. Purchases like flights, upgrades, and baggage fees are coded here.
When you swipe your credit card at any of these merchants, the transaction posts as MCC 3139 (airlines). Your card issuer uses this code to determine whether airline category bonuses apply — so knowing which merchants trigger this code helps you choose the right card before you spend.
Cardholders often think fuel costs at the airport qualify for flight rewards but they usually don't.
This distinction matters because different MCC codes can trigger different bonus rates on your credit card, even for similar types of merchants. Always check your transaction statement to confirm which MCC posted — some card issuers allow you to see the MCC in their app or online portal.
MCC 3139 stands for Airlines. It is a four-digit Merchant Category Code used by payment networks to classify businesses in the airline category.
Merchants classified under MCC 3139 (Airlines) operate in the airline sector. Card networks assign this code during merchant onboarding based on the primary business activity.
MCC 3139 (Airlines) 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 3139 (Airlines). 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 3139 is assigned to businesses providing airlines services. While this is a less common merchant category, any purchase that posts with code 3139 will be classified as 'Airlines' by your card issuer, which determines whether airline category bonuses apply to that transaction.
MCC 3139 (Airlines) and MCC 3000 (UNITED AIRLINES) are both in the airline category but cover distinct merchant types. MCC 3139 is used for airlines 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.