Yes, airlines can change your flight time, route, or aircraft, and they do it all the time. But if the change is "significant," US DOT rules say you're owed a full refund to your original form of payment if you don't want to fly the new itinerary.
Airlines adjust schedules constantly. Planes get swapped, departure times shift, connections get added, and sometimes your whole route changes. Most of the time it's minor and you'll barely notice. The important thing to know is that when a change is big enough, you have real rights, and the biggest one is your money back.
The US Department of Transportation set clear lines for what makes a change "significant" enough to trigger refund rights. It's a significant change if any of these happen:
A 30-minute shift or a new plane on the same route usually does not clear this bar, so you would not be automatically owed a refund for those.
When the airline changes your flight, you generally get to pick from three paths:
Under a DOT rule whose automatic-refund provisions took effect on October 28, 2024, refunds are supposed to be automatic and paid in your original form of payment. That means cash back to your card, or your miles returned, not a voucher. The airline can only give you a credit or voucher instead if you specifically choose to accept one. Timing matters too: credit card refunds must be processed within 7 business days, and other payment types within 20 calendar days.
If you get an email that your flight time or route changed, don't just click "accept." Check whether the change crosses the DOT thresholds above. If it does and you don't like it, you can request a full refund or a free rebooking. And do not accept a voucher if what you really want is your money back, because saying yes to the credit gives up your automatic cash refund for that trip.
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