There are two ways to use your KrisFlyer miles to upgrade a regular commercial (cash) ticket, the first is on a Singapore Airlines or SilkAir flight and the second is on a Star Alliance member airline operated flight.
In this part we’re looking at upgrades on Singapore Airlines and SilkAir, as we’ll look at Star Alliance upgrades in a future instalment.
What upgrade types are possible?
From Economy you can upgrade either to Premium Economy (if installed) or to Business Class. Even if the aircraft you’re flying on does have a Premium Economy cabin, upgrade directly from Economy to Business is permitted, so you can ‘leapfrog’ the Premium cabin on those flights.
From Premium Economy you can upgrade to Business Class.
From Business Class you can upgrade to First / Suites (if installed).
Prior to the January 2019 KrisFlyer scheme changes only a single cabin upgrade was permitted, meaning it was not possible to upgrade an Economy Class ticket to Business Class on aircraft with a Premium Economy Class cabin installed.
However since 3rd January 2019 this is now possible, at the applicable Economy to Business upgrade rates.
Which planes have which cabins?
Believe it or not, Business Class is the only cabin common to all Singapore Airlines aircraft. Economy Class is fitted to most planes (except the A350 ULR), and both Premium Economy and First Class are installed only on selected aircraft.
| Aircraft Type | Code | Eco. | Prem. | Biz | First |
| A330 | 333 |  |
 |
2009 J |
|
| A350 Standard |
359 | |
|
2013 J |
|
| A350 Regional |
359 R | |
|
2018 RJ |
|
| A350 ULR |
359 ULR | |
|
2013 J |
|
| A380 | 388 | |
|
2006 J 2017 J |
2006 R 2017 R |
| 777-200 | 772 | |
|
2009 RJ |
|
| 777-200ER | 772 ER | |
|
2006 J |
|
| 777-300 | 773 | |
|
2009 RJ |
2006 F |
| 777-300ER | 77W | |
|
2013 J |