If you’re flying on Delta, I think you should be looking at Amex Membership Rewards cards and Amex’s Delta co-brand cards. MR points transfer to Delta miles (albeit with a transfer tax that’s capped at $99). I know Delta does have some pretty good flash sales, including one the other day for Delta One award seats to Japan.
Yes, earn Chase Ultimate Rewards points too because they are a valuable and versatile points currency that transfers to many airline and hotel partners — and will very likely help with hotel accommodations in Japan — but they don’t transfer to Delta.
I love Amex because it’s quite easy to earn
a lot of MR points in a two-player mode by “supporting” the other spouse to new Amex cards, netting support bonuses, and taking advantage of elevated and incognito offers. And because Amex has a lot of business cards that do not report onto your personal credit reports, and Amex often does not do a hard pull of your credit report once you’re a customer, you can open Amex business cards without adding to your */24 count for the purposes of remaining eligible for Chase’s cards. If you have enough slots under 5/24 to give you some flexibility with what you apply for, you can afford a slot to sign up for a really big Amex personal card offer like the “Platicorn” (100k MR welcome bonus on the Amex Platinum card.)
The potential pitfall with Amex is many of their cards do carry annual fees, sometimes big ones, so you need to consider the value of the signup bonus and benefits, including the usefulness of any credits that might offset the fee. And have you been following the talk about Amex pop ups? I wrote about it in length recently
here. It’s worth a read before you jump in bed with Amex.
As for Delta and earning MR for Delta generally, I’ll defer to more knowledgeable folks like
@kmc8826,
@tink1970, and
@calypso726; and
@bernina who is also out of Detroit.
If, however, you’re planning a layover in California (or even the West Coast), that opens you up to positioning yourself at SFO or LAX (or SEA) to fly on other airlines that are transfer partners with Amex MR or Chase UR points, and you’re not stuck with only Delta.