Need help with flight booking to Bali to save money

[veerashish]

Hello,
I am planning a Bali trip with my wife in February 2025. Need your help and advice on flight booking and use of credit card to maximize saving. We will be traveling out of India for the first time.
Currently have credit cards - Amazon Pay ICICI CC (with Prime membership), Flipkart Axis CC, IDFC First Select Credit Card

Option 1) VietJet Airlines (costing INR 15k per person oneway ticket via direct airlines)
Option 2) Thai Airways (costing INR 20.5k per person oneway ticket via direct airlines)

Both options are +2k expensive on third party websites like Amazon, flipkart travel, MMT, etc. (avoiding gotogate and happyfares as heard bad reviews)

Please suggest which of my existing CC would get me maximum cashback or discount?
Also, should I apply any new CC for flight booking? I want to maximise flight booking saving because flights occupy major budget allocation.

Thank You

 

[helloworld]

You only have one option i.e., amzn pay. Do not use IDFC First Select anywhere, useless card. As secondary prefer FK.