The very best credit card signup bonuses out there are undoubtedly the 75,000 and 100,000 mile bonuses for new American Airlines credit cards from Citibank. The offers run through October 31.

The 75,000 mile offer has a landing page that includes the relevant details — no fee the first year, bonus miles after $1500 in spend within 6 months.

The 100,000 mile offer is 50,000 miles after $750 in purchases within 4 months, and another 50,000 miles after $10,000 in purchases within 12 months, no fee the first year. It’s just links, though — no landing page — everyone has been confirming that the links which take you to an application directly without mention of the bonus works just fine. The links attach the relevant offer code and that’s what Citibank sees and awards miles based on. So no worries.

But what’s the next offer? After all this one only has a month left to go.

Yaniv sends me a link to this 100,000 mile bonus offer landing page: 50,000 miles after $2000 in purchases within 4 months, another 25,000 miles after $10,000 in purchases within the first year, and an additional 25,000 miles after $10,000 in purchases during the second year. The annual fee is waived the first year.

So obviously not as good an offer — it’ll be the second year of cardmembership before you get the full 100,000 miles and you need to put $20,000 in spend on the card to get there. Plus you’ll pay the second year $85 annual fee.

So why do I mention the offer? Because it has a landing page and doesn’t have a published expiration. At least it appears so, it’s early – before my first cup of coffee – but I didn’t see an expiration date in the terms and conditions of the offer. Which simply means it’ll be around until the page is gone. So it may be useful after the other offers expire on October 31.

Still, jump on the earlier offers, they’re truly outstanding.