Thanks for the response MADPhil. As far as I can tell, Chase Ultimate rewards doesn't tell you if it's basic economy, but the prices do match up with basic economy on google flights, skyscanner, etc., and as I mentioned, almost all flight options say that bags cost an extra $60 or so. It's just that one or two options per search will claim that the first checked bag is free, even though the pricing is the same as other flights. Chase covers themselves by advising to check with airlines for baggage fees, but I'd like to know if I can count on the first checked bag being free when Ultimate Rewards claims it is....