Originally Posted by seadan

I'm experiencing the exact same issue. I believe it is the blocking of the optimizely.com domain (and subdomains), which it looks like AS uses for A/B testing. When this site is blocked, it must fail to load some flag to tell it to show the new discount code interface, and you just get ping-ponged back and forth. If you whitelist this domain, then you should see the codes. It worked for me.

However, I'm now running into an issue where I cannot actually complete a search on the Book page when I enter the code -- the Find Flights button just doesn't do anything (except generate a JS error). It's super frustrating that AS doesn't test their site to make sure it works in these common scenarios of users with ad blockers. I did try emailing CS about it and got back an AI-generated response basically saying they'd forward it on.