In September 2025, we saw the Capital One mileage program add Japan Airlines Mileage Bank as its newest transfer partner. We’ve just seen the program introduce its fourth transfer bonus to the program since launch, and it could represent a good deal. However, it still won’t quite get you a 1:1 transfer ratio.
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Transfer Capital One miles to Japan Airlines with 30% bonus
Between September 1 and September 30, 2026, the Capital One mileage program in the United States is offering a 30% bonus on points transfers to Japan Airlines Mileage Bank. Capital One miles convert into Japan Airlines miles at a 4:3 ratio, so you get 750 Japan Airlines miles for every 1,000 Capital One miles transferred.
However, with a 30% bonus, the transfer ratio is temporarily 1,000:975, so that’s pretty close to 1:1. Keep in mind that many popular Capital One cards earn 2x miles per dollar spent, so with this bonus, you could be earning close to two Japan Airlines miles per dollar spent.
Of the four major bank transferable points currencies, Capital One is the only one to partner with Japan Airlines Mileage Bank, so that’s exciting. However, Bilt Rewards also partners with the program, and has a 1:1 transfer ratio in the first place, so that would typically be my first pick.
Is this Capital One to Japan Airlines transfer bonus worth it?
Japan Airlines Mileage Bank is a niche frequent flyer program that we historically haven’t paid much attention to in the United States. When it comes to actually redeeming for travel on Japan Airlines, I’d say the program is sort of valuable:
- Japan Airlines releases the same saver level award space to its own members as it does to partner program members; the advantage is that you get access to some awards that are priced a little higher, but with much better availability
- Redemption rates through Japan Airlines Mileage Bank may be a little lower than through partner programs, but given how hard it is to accrue the points, that’s not necessarily the reason you’d want to redeem through the program
- One advantage of Japan Airlines Mileage Bank is that you get access to award space 360 days out, right when the schedule opens, which is ideal in terms of accessing first and business class awards, especially given that the airline consistently opens award seats when the schedule opens
Japan Airlines Mileage Bank also has lucrative redemption rates on other airlines, including oneworld partners, and select non-oneworld partners, like Air France, Emirates, etc. For example, below is the distance based business class award chart.
There’s also a oneworld award chart, if you’re traveling on two or more oneworld airlines, with the benefit of multiple stopovers being allowed.
One thing to keep in mind is that Japan Airlines Mileage Bank has restrictions on who you can redeem for. You can only redeem miles for family members, who you are related to by marriage or blood. So if you’re going to participate in Mileage Bank, you’ll definitely want to read up on some of the technicalities before making a transfer, as this isn’t as straightforward as some other programs.
So yeah, I’d say there’s quite a bit of value to be had, potentially, and I’m happy to see the program increasingly partnering with transferable points currencies. However, I’d say the close to 1:1 transfer ratio we see when there’s a bonus is more in line with what it usually should be, rather than anything spectacular.
Bottom line
Capital One is offering a 30% bonus on mileage transfers to Japan Airlines Mileage Bank. So while the transfer ratio is usually 4:3, with this 30% bonus, you’re looking at a pretty close to 1:1 transfer ratio. I’m happy that Japan Airlines is a Capital One transfer partner, and frankly, I’d really only consider making a transfer when there’s a bonus available.
I don’t think this 30% bonus is compelling enough to make a speculative transfer, but with a specific use in mind, this could be worthwhile.
Do you plan on taking advantage of this Capital One to Japan Airlines transfer bonus?
JMB just does have the supply to meet the massive new demand by all the point transfers to its FF program in last years. And it shows in the availability.
Does anyone have any data about whether JAL recognizes registered domestic partners like spouses?
Perhaps the bigger story is the growing frequency that Capital One is offering transfer bonuses for Japan Airlines JMB and other frequent flyer programs. Although I am a member of JMB, I don't participate much, because it isn't as competitive for itineraries between North America and Southeast Asia. EVA is a really good option for those awards. Like JMB, Capital One normally has a transfer ratio of 4:3 to EVA's FFP. There was a transfer...
Perhaps the bigger story is the growing frequency that Capital One is offering transfer bonuses for Japan Airlines JMB and other frequent flyer programs. Although I am a member of JMB, I don't participate much, because it isn't as competitive for itineraries between North America and Southeast Asia. EVA is a really good option for those awards. Like JMB, Capital One normally has a transfer ratio of 4:3 to EVA's FFP. There was a transfer bonus a couple of months ago for that. Offering both Japan Airlines and EVA as transfer partners, Capital One is increasingly competitive as an airline transfer currency, especially with the frequent transfer bonuses.
Great value for LATAM business class at 85k JAL (113.5k Cap1) + $45USD -- just booked my grandparents roundtrip from NYC to SCL last week. Of course there is now a transfer bonus that would have saved me 60k miles!
I enrolled in the JL program yesterday to explore award possibilities. JL does not allow redemptions until one has been enrolled for 60 days. Who knows if the C1 transfer bonus will exist in June.
Keep checking. It seems some are getting access before that 60 day mark. Honestly, not sure in my case. I have access now, didn't a week ago. I think I signed up sometime in early March.
If you transfer points into the account, you should get access within a few days. Just transfer 1000 points, to be safe. I did this a few months ago and it worked. There are articles about this method.
Keep in mind their award chart is not static, if supply/demand is tight the mileage needed goes up. These days it's common that even if the chart says 55,000 miles you can't find that flight for less that 150,000 miles for several months out. Not good value for money in my opinion.
HND-JFK
J 116k
F 125k waitlist
I don’t like to wait so I took the J.
Meh, the BILT rent day bonus was better…
(C1 won’t approve me, so I can’t do this anyway. Workin’ on it though…)
To start with, C1 transfer ratio to JL is worse than Bilt’s, so C1 with bonus = Bilt with no bonus.
What else are you going to use C1 points for?
Air France, Singapore.
Air Canada.