I was able to work a few deals with specific airline credit cards and a few other cards to batch them together to get a deal. (debtroundup.com)
Because you are earning miles that are redeemed for travel credit, you don't have to worry about using your miles for specific airlines. (creditcardsmarts.org)
When flying on specific airlines and through airports that have airline specific lounges, even more options are available. (blog.tortugabackpacks.com)