Will Marriott refund the transfer if the award seat is gone?

No. Marriott's pages make no exception for award seats that disappear after a transfer, which is why the usual advice is to find the seat and confirm the price before moving points. Once the miles post, the choice is between waiting for new availability, using them another way or selling them.

How much are my Singapore Airlines KrisFlyer miles worth now?

Published valuations put Singapore Airlines KrisFlyer miles at 1.30¢ to 1.35¢ each when redeemed for flights, with partner premium-cabin awards above that and cash-style redemptions below. As cash, Points Plug pays 1.06¢ to 1.25¢ per mile depending on the balance, so 100,000 miles fetch about $1,120.

How does selling Singapore Airlines KrisFlyer miles to Points Plug work?

Enter your balance in the quote form for an instant offer and price per mile. Accept it, and our team confirms the details, books last-minute travel for pre-qualified customers through your account and pays you by your preferred method, typically within 24-48 hours of the booking. The minimum is 50,000 miles in one program, and the quote is free with no obligation.

Accidental transfer · Marriott to Singapore Airlines KrisFlyer

Accidentally transferred Marriott points to Singapore Airlines KrisFlyer? Here's how to sell the miles

No bank reverses a points transfer, and Marriott is no exception. The Marriott Bonvoy program terms say that once miles have been awarded to the chosen airline program they may not be changed to another airline program or converted back to Bonvoy points, and that cancellations, changes, reissuance and refunds of miles are not allowed. The Marriott Bonvoy points you moved are Singapore Airlines KrisFlyer miles now, and Singapore Airlines KrisFlyer's rules decide what can happen to them.

If you will not fly on them, Points Plug buys Singapore Airlines KrisFlyer miles from 50,000 miles at 1.06¢ to 1.25¢ per mile, depending on the balance, with payment in 24-48 hours: 100,000 miles fetch about $1,120. This page covers what the miles are worth, what Singapore Airlines KrisFlyer lets you do with them instead, and how to sell.

Written and reviewed by the Points Plug team. Last reviewed October 29, 2026.

Can Marriott reverse it?: No; Stated on its own pages
Transfer ratio: 3:1; Marriott points to Singapore Airlines KrisFlyer miles
Miles expiry: 36 months after they are earned
Points Plug pays: 1.06¢ to 1.25¢ per mile; From 50,000 miles

Can a Marriott transfer to Singapore Airlines KrisFlyer be reversed?

The Marriott Bonvoy program terms say that once miles have been awarded to the designated airline frequent flyer program, they may not be changed to another airline program or converted back to Loyalty Program Points, and that once points are ordered to an account, cancellation, changes, reissuance and refunds of miles are not allowed. Marriott's help centre puts it simply: once miles are awarded to an airline program, they cannot be moved to another airline or converted back into Marriott Bonvoy Points.

That covers both mistakes people make with Bonvoy conversions: choosing the wrong airline, and converting more points than an award needed. The 3:1 ratio also means the points cannot be rebuilt cheaply, so the miles are usually worth more sold than the hotel points would have been.

How Marriott transfers work

Points convert at 3:1 to most airlines, with 5,000 bonus miles for every 60,000 points moved. United receives 10,000 bonus miles per 60,000 points; American and Delta receive no bonus.
Conversions run from 3,000 up to 240,000 points a day, and for most airline partners the first and last name on the airline account must match your Bonvoy name.
Marriott's points-to-miles page lists posting times per airline; most take several days, and the miles are not yours to use until they post.

If the points have not posted, or went somewhere you did not expect

If the miles have not posted within the time Marriott lists for that airline, contact Marriott Bonvoy member support with the conversion confirmation.
Marriott's terms rule out changing the airline or reissuing the miles once they are awarded, so a conversion to the wrong airline stands.

What your Singapore Airlines KrisFlyer miles are worth now

Published valuations put Singapore Airlines KrisFlyer miles at 1.30¢ to 1.35¢ each, about 1.32¢ on average, as of September 22, 2026. The published figure assumes the miles go on flights; what you actually get depends on the award, and the Singapore Airlines KrisFlyer valuation page lists the redemptions behind the range.

For the miles you hold now, Points Plug pays 1.06¢ to 1.25¢ per mile, rising with the balance; 100,000 Singapore Airlines KrisFlyer miles, roughly what 300,000 Marriott points became at 3:1, fetch about $1,120. The quote form on this page shows the exact figure for your balance.

Balance	Rate per mile	Example offer
50,000 to 99,999 miles	1.06¢	50,000 miles: $530
100,000 to 199,999 miles	1.12¢	100,000 miles: $1,120
200,000 to 499,999 miles	1.19¢	200,000 miles: $2,380
500,000+ miles	1.25¢	500,000 miles: $6,250

Offers are a share of the program's typical published value; our rates page explains how they are set for every program.

How to sell Singapore Airlines KrisFlyer miles

Get a quote. The form on this page is preset to Singapore Airlines KrisFlyer; enter your balance and the offer and price per mile appear before you give up anything.
Accept the offer. Our team reaches out to confirm the details and explain how the booking will be handled. You keep your account and your login.
The miles are used to book last-minute travel for pre-qualified customers through your account, usually in one or two bookings rather than many small ones.
You are paid through the method you choose, typically within 24-48 hours of the booking.

The minimum is 50,000 miles in one program, and balances of 100,000, 200,000 and 500,000 earn higher rates. You never pay anything: the quote is free and the offer you accept is the amount you receive. Read how it works and the guide to selling airline miles for the detail.

Airline programs' terms restrict selling miles. Our Singapore Airlines KrisFlyer Q&A quotes Singapore Airlines KrisFlyer's own rule, so you can read it before you decide.

Other ways to use the miles

Fly on them

Singapore Airlines Suites and First Class, which are generally only bookable with KrisFlyer miles, and long-haul Business Class on the A350 and 777.
Spontaneous Escapes, monthly discounts of around 30% on selected Singapore Airlines award routes.
Star Alliance partner awards, including United domestic flights and Lufthansa to Europe, on a distance-based chart.

The Singapore Airlines KrisFlyer award chart shows what the balance books and which redemptions return the most per mile, and the Singapore Airlines KrisFlyer program guide covers the traps.

Share or pool them

Transfers to another KrisFlyer member are not permitted (section D.14 of the terms) except from a linked minor's account to a parent, and pooling is barred (D.11). Instead you nominate up to five people to a Redemption Group and book awards for them from your own balance.

Move them to another program

Not to a bank. KrisFlyer miles can convert out to Marriott Bonvoy at 4 miles to 3 points (minimum 3,000 miles, up to 250,000 a year), to Virgin Australia Velocity at 1.55 miles per point (minimum 5,000 miles, not reversible) and to a few hotel and retail programs, but never back to a bank program.

Points Plug can also convert Singapore Airlines KrisFlyer miles into another airline program from 50,000 miles, with the fee built into the rate the quote shows.

Top up for an award

A few thousand short of the award you wanted? How to buy Singapore Airlines KrisFlyer miles covers the price, the limits and any promotion running now.

Will the miles expire?

KrisFlyer miles expire three years after they are earned, on the last day of that month, regardless of account activity. PPS Club members' miles do not expire; other members can pay to extend a batch by six or twelve months.

Every batch of miles carries its own three-year expiry from the month it was earned, so the transferred miles expire three years from the transfer month and do nothing for older miles.

Source: KrisFlyer terms and conditions. See do airline miles expire for every program's rule.

Avoiding the same mistake next time

Find the award seat first and confirm it books with Singapore Airlines KrisFlyer at the price you expect. Only then transfer, and only the amount the award needs; the rest keeps its flexibility in Marriott.
Read the partner name on the confirmation screen before you confirm. Several partners have similar names (Virgin Atlantic and Virgin Red, the four Avios programs) and a mis-tap lands the points somewhere else for good.
Hold Marriott points in Marriott until a trip is certain. There they keep their cash option and their choice of partners, and transfer bonuses of 20 to 40 percent come round several times a year.
Keep the confirmation email until the miles post, and check the airline account under the same name before assuming a transfer failed; posting times run from minutes to two weeks depending on the issuer and the airline.
Our guide to transferring credit card points to airlines covers ratios, timing and fees for every issuer.

Marriott to Singapore Airlines KrisFlyer: FAQ

Can I reverse a Marriott transfer to Singapore Airlines KrisFlyer?: No. The Marriott Bonvoy program terms say that once miles have been awarded to the chosen airline program they may not be changed to another airline program or converted back to Bonvoy points, and that cancellations, changes, reissuance and refunds of miles are not allowed. The points are Singapore Airlines KrisFlyer miles now and follow Singapore Airlines KrisFlyer's rules.
Can I move Singapore Airlines KrisFlyer miles back to Marriott Bonvoy?: Not to a bank. KrisFlyer miles can convert out to Marriott Bonvoy at 4 miles to 3 points (minimum 3,000 miles, up to 250,000 a year), to Virgin Australia Velocity at 1.55 miles per point (minimum 5,000 miles, not reversible) and to a few hotel and retail programs, but never back to a bank program.
Will Marriott refund the transfer if the award seat is gone?: No. Marriott's pages make no exception for award seats that disappear after a transfer, which is why the usual advice is to find the seat and confirm the price before moving points. Once the miles post, the choice is between waiting for new availability, using them another way or selling them.
How much are my Singapore Airlines KrisFlyer miles worth now?: Published valuations put Singapore Airlines KrisFlyer miles at 1.30¢ to 1.35¢ each when redeemed for flights, with partner premium-cabin awards above that and cash-style redemptions below. As cash, Points Plug pays 1.06¢ to 1.25¢ per mile depending on the balance, so 100,000 miles fetch about $1,120.
How does selling Singapore Airlines KrisFlyer miles to Points Plug work?: Enter your balance in the quote form for an instant offer and price per mile. Accept it, and our team confirms the details, books last-minute travel for pre-qualified customers through your account and pays you by your preferred method, typically within 24-48 hours of the booking. The minimum is 50,000 miles in one program, and the quote is free with no obligation.
Can I give the miles to someone else or pool them?: Transfers to another KrisFlyer member are not permitted (section D.14 of the terms) except from a linked minor's account to a parent, and pooling is barred (D.11). Instead you nominate up to five people to a Redemption Group and book awards for them from your own balance.
Do Singapore Airlines KrisFlyer miles expire after a transfer?: KrisFlyer miles expire three years after they are earned, on the last day of that month, regardless of account activity. PPS Club members' miles do not expire; other members can pay to extend a batch by six or twelve months. Every batch of miles carries its own three-year expiry from the month it was earned, so the transferred miles expire three years from the transfer month and do nothing for older miles.

Sources

Marriott Bonvoy: loyalty program terms and conditions (points to miles) · official page
Marriott Bonvoy: convert points to miles · official page
Marriott help centre: earning points or airline miles for a hotel stay · official page
Singapore Airlines: other ways to redeem KrisFlyer miles · official page
Singapore Airlines: KrisFlyer terms and conditions · official page

Other accidental transfers

Every bank's rule on reversing transfers, with a page for each transfer route.