For travel credit cards, you have basically two options:
1) Flexible rewards points that can be transferred to multiple airlines (e.g. Chase Ultimate Rewards, Amex Membership Rewards, etc.)
2) Cobranded cards (e.g. the Alaska Airlines credit card).
The advantage of the former is the flexibility (can be transferred to multiple airlines) and that they can also be redeemed for cash if you don't want to redeem for travel. The advantage of the latter is that you typically get free checked baggage as long as you hold a card with an annual fee, typically $95-$100. If you always check baggage, the amount of money you can save from getting your baggage fees waived can easily outpace the annual fee.
Miles are
usually worth around 1 cent per point, usually more, sometimes less, but this varies wildly, and airlines are pretty much continually trying to devalue of their points.
There is only one cobranded credit card from Alaska; it's from Bank of America. It has a $95 annual fee and earns 3x on Alaska Airlines, 2x on gas, cable, streaming services, and local transit. There are a number of cards that will earn more miles than this, but they won't come with the checked baggage benefit.
If you're inexperienced with credit, as long as you (1) pay off your entire card balance in full every month and (2) only use your card for purchases (not cash advances), the only kind of fee you may pay is an annual fee. You never want to carry a balance on a credit card; the "I should carry a balance to improve my credit score" is a myth.
There are a lot of variables that will affect which card will be best for you. If you answer them, I can make some recommendations.
- When you say that you "usually" fly Alaska, does that mean 90% of the time? 55% of the time? The closer that # is to 100, the more it favors cobrand.
- How many flights do you usually take a year?
- How many people usually travel with you?
- Do you usually check bags?
- Do you usually get add-on services like buying in-flight food or Wi-Fi?
- Do you want to keep all of your spending on one credit card even if it means that the amount of miles you will earn will be likely be less than "optimizing" on several different cards?
- What is your credit score like?
- Where do you spend most of your money? Groceries? Gas? At what stores?