Northwest Airlines no longer exists as a standalone airline

Northwest Airlines ceased operations as an independent carrier in 2010 when it merged with Delta Air Lines. If you held a Northwest Airlines credit card or frequent flyer account, your miles and benefits transferred to Delta's SkyMiles program. There is no current "Northwest Airlines membership" to join — the airline brand itself is gone.

If you are looking for a credit card tied to a major airline, you now have options with Delta, United, American, and Southwest, each with their own rewards programs. If you previously had a Northwest account, understanding what happened to your miles and how to access them through Delta is the practical next step.

Key Takeaways

  • Northwest Airlines merged into Delta Air Lines in 2010, and the Northwest brand no longer operates independently.
  • Frequent flyer miles from Northwest accounts were converted to Delta SkyMiles at a set exchange rate during the merger.
  • If you had a Northwest Airlines credit card, the account was closed and you would have needed to open a new card with Delta or another airline to continue earning rewards.
  • You can check your old Northwest frequent flyer balance by contacting Delta directly or logging into your SkyMiles account if you already have one.

What happened to Northwest frequent flyer miles

When Northwest merged with Delta, the airline converted all outstanding frequent flyer miles from the WorldPerks program (Northwest's rewards program) into Delta SkyMiles. The conversion happened automatically for accounts that were active at the time of the merger. Miles were not lost — they were transferred and remain in your account under your SkyMiles membership number.

If your account had been inactive for a long period before the merger, it may have been closed by Northwest's policies, which means those miles would no longer be recoverable. However, if your account was open when the merger completed, your miles should still be there. You can contact Delta SkyMiles directly to locate your account using your old Northwest frequent flyer number or the email address associated with your account.

How to find your converted miles and access them

To locate your miles after the merger, visit Delta's SkyMiles website and use the account recovery tool. You will need either your old Northwest frequent flyer number or the email address you used with Northwest. If you do not remember your number, Delta's customer service team can search for your account using your name and date of birth.

Once you locate your account, you can log in and see your current SkyMiles balance. These miles work the same way as any other SkyMiles — you can use them to book Delta flights, upgrade seats, or redeem them for other travel-related purchases through the SkyMiles marketplace. You do not need to do anything special; the miles are already yours and ready to use.

Northwest Airlines credit cards and what replaced them

Northwest Airlines credit cards were issued by various banks over the years, most notably by WorldPerks and later by other financial institutions. When the merger happened, those card programs were discontinued. If you held a Northwest Airlines card, your account was closed and you stopped earning miles on new purchases.

If you want to continue earning rewards on credit card spending, you can now open a Delta credit card through American Express, Chase, or another issuer. These cards earn SkyMiles on every purchase and offer sign-up bonuses, priority boarding, and other perks. The earning rates and benefits vary by card and issuer, so comparing current options makes sense if you want to rebuild your rewards balance.

Why the merger happened and what it means for you

Northwest Airlines filed for bankruptcy in 2005 and emerged under new ownership. Delta Air Lines acquired Northwest in 2008, and the integration took about two years to complete. The merger consolidated two major carriers into one, which meant eliminating duplicate routes, consolidating frequent flyer programs, and eventually retiring the Northwest brand entirely.

For customers, this meant that Northwest routes became Delta routes, Northwest planes were repainted with Delta livery, and the WorldPerks program became part of SkyMiles. If you were a loyal Northwest customer, your miles were preserved, but you had to transition to using Delta for future travel and rewards earning. This is a common outcome in airline mergers — the smaller or weaker carrier's brand is retired and folded into the larger one.

Other airline credit cards and rewards programs to consider

If you are interested in earning rewards through an airline credit card now, you have several major options. Delta SkyMiles cards are available through American Express and Chase. United Airlines cards are issued through Chase. American Airlines cards come through Citi and Barclays. Southwest Airlines cards are available through Chase. Each program has different earning rates, annual fees, and sign-up bonuses.

When choosing a card, consider which airline you fly most often, whether you value earning miles or cash back, and what perks matter to you — such as free checked bags, priority boarding, or lounge access. You can also hold multiple airline cards if you split your travel between carriers. The best choice depends on your actual travel patterns, not on brand loyalty alone.

Frequently Asked Questions

Can I still use my old Northwest frequent flyer number?

Your Northwest frequent flyer number was converted to a Delta SkyMiles account number during the merger. You can use your old Northwest number to locate your account on Delta's website, but you will log in and manage your account using your SkyMiles number going forward. Both numbers are linked to the same account.

What if I cannot find my old Northwest account?

Contact Delta SkyMiles customer service directly by phone or through their website. Have your name, date of birth, and email address ready. If your account existed at the time of the merger, Delta can locate it. If your account had been inactive for several years before the merger, it may have been closed under Northwest's inactivity policy, and those miles would not be recoverable.

Do I lose my miles if I do not use them?

Delta SkyMiles do not expire as long as you have some account activity at least once every 24 months. Activity includes earning miles, redeeming miles, or even just logging into your account. If your account goes inactive for more than 24 months, your miles may be forfeited. Check your account regularly to stay active.

Can I transfer my old Northwest miles to another airline?

No, your converted SkyMiles are locked into the Delta program and cannot be transferred to another airline's rewards program. However, you can use them to book flights on partner airlines through Delta's SkyTeam alliance, which includes airlines like Air France, KLM, and others. This gives you some flexibility in how you redeem.

Should I open a Delta credit card if I have old Northwest miles?

Opening a Delta credit card is a separate decision from having old miles. If you fly Delta regularly or want to earn rewards on credit card spending, a Delta card makes sense. The card will earn new miles that add to your existing balance. You do not need a card to use your old miles — you can redeem them anytime through your SkyMiles account.