Having a Delta credit card gets you a free checked bag every time you fly the airline — here’s how to use the perk

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Delta Air Lines

One of the perks that comes with Delta’s three main credit cards – the Gold Delta SkyMiles, Platinum Delta SkyMiles, and Delta Reserve cards – is a free checked bag for the cardholder and up to eight travel companions on the same reservation.

For travelers who tend to check bags, the savings can add up quickly. Delta charges $30 each way for a checked bag on a domestic flight. For a family of four taking a long vacation, just having the credit card can help save $240 – $30 each bag, each way would mean a total of $240 for the whole family.

Using the benefit is easy

When you apply for the Delta Amex card, you’re prompted to enter your Delta SkyMiles number. From that point on, as long as the card is open, the benefits are tied to your SkyMiles account.

Just make sure that you’re logged in to your Delta account when booking tickets – or, if you’re booking through a third-party portal like Expedia, just enter your Delta number during the booking process. If you go to add a bag when checking in for your flight, you’ll see a cost of $0.00. The same will apply for anyone else on the same reservation with you.

The key is making sure that you’re on the same reservation. If you book separately, your travel companions won’t have access to free checked bags unless they have their own Delta credit card (or hold elite Medallion status).

Learn more: 10 lucrative credit card sign-up offers available this month

If you’re thinking about getting a Delta credit card, now is the perfect time. Two of the cards are offering limited-time welcome bonuses that can get you cash back on Delta flights as well as bonus miles.

The Gold Delta SkyMiles card offers 30,000 Delta SkyMiles when you spend $1,000 in the first three months.

The Platinum version is offering 35,000 SkyMiles and 5,000 MQMs when you spend $1,000 in the first three months.

Delta’s premium card, the Delta Reserve, offers 40,000 miles and 10,000 Medallion Qualification Miles after you spend $3,000 in three months.

$95 annual fee, waived the first year: Click here to learn more about the Gold Delta SkyMiles card from Business Insider’s partner: The Points Guy.

$195 annual fee: Click here to learn more about the Platinum Delta SkyMiles card from Business Insider’s partner: The Points Guy.

$450 annual fee: Click here to learn more about the Delta Reserve card from Business Insider’s partner: The Points Guy.