Whether Delta owes you money depends on the cause of the delay and the location of the flight. If your flight departs from an airport in the European Union or the UK (under EU 261 or UK 261), and the delay is over 3 hours due to Delta's fault (not weather), you could be entitled to up to $700 (€600/£520) in cash compensation. For domestic U.S. flights, Delta is not legally required to provide cash compensation for delays under federal law. However, under the updated 2024 DOT "Automatic Refund" rules, if Delta cancels your flight or makes a "significant change" (over 3 hours for domestic, 6 for international) and you choose not to travel, they must provide a full cash refund to your original payment method. For controllable delays (like mechanical issues), Delta’s own policy often includes providing meal vouchers and hotel accommodations, but "cash for your time" is generally not a legal requirement in the U.S. unless you are bumped from an oversold flight.