Editor's note: Terms apply to American Express benefits and offers. Enrollment may be required for select American Express benefits and offers. Visit americanexpress.com to learn more.

Delta SkyMiles credit cards from American Express already have a ton of benefits for frequent Delta travelers — but these cards just got even better.

Following some major changes to the SkyMiles program this year, Delta has boosted the welcome bonus on several popular cards. That means new Delta cardholders can more easily earn miles, get upgrades, and further maximize value.

The new welcome offers are:

• Delta SkyMiles® Gold American Express Card: Earn 80,000 Bonus Miles after you spend $3,000 in eligible purchases on your new Card in your first 6 months of Card Membership

• Delta SkyMiles® Platinum American Express Card: Earn 90,000 Bonus Miles after you spend $4,000 in eligible purchases on your new Card in your first 6 months of Card Membership

• Delta SkyMiles® Reserve American Express Card: Earn 100,000 Bonus Miles after you spend $6,000 in eligible purchases on your new Card in your first 6 months of Card Membership

Here’s an overview of these popular travel credit cards:

Delta SkyMiles® Gold American Express Card

Rates & fees, terms apply

• Annual fee
  $0 introductory annual fee for the first year, then $150.
• Welcome offer
  Earn 80,000 Bonus Miles after you spend $3,000 in eligible purchases on your new Card in your first 6 months of Card Membership
• Card type(s)
  Travel, Airline
• Ongoing Purchases APR
  20.99%-29.99% Variable
• Recommended credit score
  Excellent/Good

• Rewards rate
  • Earn 2x mile on Delta purchases, at U.S. supermarkets and at restaurants worldwide (including takeout and delivery in the U.S.)
  • Earn 1x mile on all other eligible purchases.

• Benefits
  • Enjoy a $0 introductory annual fee for the first year, then $150
  • After you spend $10,000 in purchases on your Card in a calendar year, you can receive a $200 Delta Flight Credit to use toward future travel
  • Check your first bag free on Delta flights

Learn more

Delta SkyMiles® Platinum American Express Card

Rates & fees, terms apply

• Annual fee
  $350
• Welcome offer
  Earn 90,000 Bonus Miles after you spend $4,000 in eligible purchases on your new Card in your first 6 months of Card Membership
• Card type(s)
  Travel, Airline
• Ongoing Purchases APR
  20.99%-29.99% Variable
• Recommended credit score
  Excellent/Good

• Rewards rate
  • 3x miles on Delta purchases and purchases made directly with hotels
  • 2x miles at restaurants worldwide including takeout and delivery in the U.S., and at U.S. supermarkets
  • 1x miles on all other eligible purchases

• Benefits
  • Receive either a $100 statement credit every 4 years for a Global Entry application fee or a statement credit up to $85 every 4.5 years for a TSA PreCheck
  • Earn up to $10 in statement credits each month after using your Delta SkyMiles® Platinum American Express Card on U.S. rideshare purchases with select providers. Enrollment required
  • Check your first bag free on Delta flights

Learn more

Other perks:

• Companion certificate offer: The companion certificate awards one companion ticket each account year, and applies to a Main Cabin round trip flight to domestic, Caribbean, or Central American destinations (not including taxes and fees).

• MQDs: Get $2,500 Medallion Qualification Dollars each Medallion Qualification Year (find out more about gaining status with MQDs on Delta’s site).

• Resy credit: Earn up to $120 ($10 per month in statement credits) annually on eligible Resy purchases.

• Delta Stays benefit: Earn up to $150 back in annual statement credits on eligible prepaid bookings through Delta Stays.

• Upgrades: Get added to the complimentary upgrade list with an eligible flight ticket, even if you’re not a Medallion member

• Hertz status: Get Hertz Five Star Status when you enroll in the rewards program with your card.

Read more: See our picks for the best American Express credit cards

Delta SkyMiles® Reserve American Express Card

Rates & fees, terms apply

• Annual fee
  $650
• Welcome offer
  Earn 100,000 Bonus Miles after you spend $6,000 in eligible purchases on your new Card in your first 6 months of Card Membership
• Card type(s)
  Travel, Airline
• Ongoing Purchases APR
  20.99% - 29.99% Variable
• Recommended credit score
  Excellent/Good

• Rewards rate
  • 3x miles on Delta purchases
  • 1x miles on all other purchases

• Benefits
  • Receive upgrade priority over other Medallion Members within the same Medallion level and fare class
  • Earn up to $10 back in statement credits each month after you use your Delta SkyMiles® Reserve American Express Card to pay for U.S. rideshare purchases with select providers. Enrollment required
  • Receive four Delta Sky Club® One-Time Guest Passes each year when you fly Delta so you can share the experience with family and friends

Learn more

Other perks:

• Companion certificate offer: This card’s companion certificate can apply not only to Main Cabin fare but also First Class or Delta Comfort+. You can get a companion round-trip ticket on your choice fare class to domestic, Caribbean, or Central American destinations (not including taxes and fees).

• MQDs: Get $2,500 Medallion Qualification Dollars each Medallion Qualification Year.

• Resy credit: Earn up to $240 ($20 per month in statement credits) annually on eligible Resy purchases.

• Upgrades: Get added to the complimentary upgrade list with an eligible flight ticket, even if you’re not a Medallion member; Medallion members with a Reserve card get upgrade priority over other members at the same Medallion level and fare class

• Delta Stays benefit: Earn up to $200 back in annual statement credits on eligible prepaid bookings through Delta Stays.

• Hertz status: Get Hertz President’s Circle Status when you enroll in the rewards program with your card.

Should you get a Delta SkyMiles American Express card?

We’ve seen a lot of changes from Delta over the past few months, from its overhauled SkyMiles program to revamped Sky Club access and ways to earn Medallion status. But we still think the Delta SkyMiles American Express travel credit cards can offer a lot of potential value.

For one, some benefits apply to spending beyond Delta bookings and flights, which is good for everyday savings. Rideshare and Resy credits can help you maximize nights out at home or on vacation. But frequent flyers will also enjoy travel-related perks, from complimentary upgrades to enhanced companion passes and a boost toward Medallion status.

If you’re already considering opening a Delta SkyMiles card, the new welcome offers alone could be enough incentive to apply. We don’t know how long the increased offers will last, but they’re some of the best we’ve seen from these cards. No matter which card you choose, you can get hundreds of dollars back in flight value from Delta.

Keep in mind, these new benefits are only useful if you fly frequently enough to take advantage and Delta is your preferred airline. If you’re not a regular traveler or you prefer to shop around for flight deals over staying loyal to a single airline, you may be better off with a more general (and potentially lower-cost) travel credit card.

As always, make sure you compare your regular spending with the potential value you can get from a Delta Amex card. If you won’t use enough of the benefits to outweigh the annual fee or spend enough with Delta to maximize the miles you’ll earn, you may want to look elsewhere.

This article was edited by Rebecca McCracken

Editorial Disclosure: The information in this article has not been reviewed or approved by any advertiser. All opinions belong solely to Yahoo Finance and are not those of any other entity. The details on financial products, including card rates and fees, are accurate as of the publish date. All products or services are presented without warranty. Check the bank’s website for the most current information. This site doesn't include all currently available offers. Credit score alone does not guarantee or imply approval for any financial product.