Just weeks after Southwest Airlines announced a rewards-earning debit card, United Airlines seems poised to do the same. Leaked details shows what looks like the upcoming debit card’s earning rates, spend bonuses, and earning caps.Here’s what we know about United’s upcoming debit card and whether or not it will be a good deal.AdvertisementNew United Airlines Debit Card — What We KnowIf these plans come true, it looks like United Airlines is about to get into the rewards debit card arena, just like Southwest ...