If you live outside of Indonesia, you will find that it is not possible to purchase LionAir tickets using your credit card.
You will ultimately get an error message saying that it is not possible.
The solution that I found to work is purchasing the tickets through Tiket2.com They will charge you $49,000 IDR per ticket (~$5 USD) per ticket transaction fee. They will also only hold the tickets for a certain period of time. (e.g., 1-2 days)
You will select the tickets and then you will need to wire the money to them via Western Union. The company is legitimate and does have an active FB page. You will need to email them for the contact information to send the money.
This is the information that they gave me.
Name : Agneta Indriati Ananda
Address : Sagan Wetan GK 5/1159 Yogyakarta Indonesia.
I initially tried to send the money via the Western Union website, but I got an error message. After talking with customer support, they indicated that this could happen. They encouraged me to go to Western Union location where “99%” of the time that it will go through. I live in NYC so it wasn’t an issue.
I went to a Western Union agent, and they only needed the person’s name.
I took a picture of receipt and sent them the MTCN number (number is on top of receipt) and that is all that was needed. They then sent me the tickets. I hope this helps!