Same-day flight change and standby rules by airline (2026)
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Quick answer
- Standby for an earlier flight is free at United, Delta and American, and free on Southwest Choice fares and above.
- A confirmed same-day change costs $75 at Delta for most travelers; United and American may charge a fare or price difference; Southwest Choice fares change free.
- Basic fares are the big exclusion: Delta Basic gets neither option and Southwest Basic doesn't include them.
- Every airline keeps you on the same origin and destination for a same-day move.
The rules side by side
| Airline | Confirmed same-day change | Same-day standby | Basic fares |
|---|---|---|---|
| United | Flight within 24 hours before or after yours, same airports, United or United Express. Free for some Premier members; others may pay a price difference. | Free for everyone | Not stated as excluded from standby; Basic can't otherwise be changed |
| Delta | $75 (free for Diamond, Platinum and Gold Medallions and for Extra or refundable tickets). Earlier flight, same day, if your fare class is open. | Free, only when a confirmed change isn't available | Excluded from both |
| American | Confirm a seat on another American flight on your departure day, same airports, within 24 hours of the new flight. Free for some elite and oneworld members. | Free for all customers, no guaranteed seat | Excluded from the elite free-change perk if bought on or after May 18, 2026 |
| Southwest | Free on Choice, Choice Preferred and Choice Extra (taxes and fees may apply) | Free on Choice fares and above | Not included with Basic |
Confirmed change or standby: which to pick
A confirmed change guarantees the seat; standby doesn't. If you must arrive by a certain time, a confirmed change is worth paying for where it is offered. If you are simply hoping to get home earlier, standby costs nothing at the big four and your original seat stays yours until you clear.
Delta only lets you stand by when a confirmed change isn't available, and American suggests standby when same-day change is sold out. In both cases you can check the app first: if the confirmed option shows a seat, that is the safer move.
United
United's same-day change keeps your departure and arrival airports and moves you to a United or United Express flight leaving within 24 hours before or after your original one. Premier members may get it free; everyone else may pay a price difference, even when the same cabin is available.
Standby is free to join in My Trips (View flight options), at a kiosk or at the counter. Seats are handed out about 30 minutes before a domestic departure and 60 minutes before an international one. Priority goes by Premier status, then cabin, certain United cardmembers and corporate customers, then the time you asked.
Delta
Same-Day Confirmed and Same-Day Standby open 24 hours before your original departure and only move you earlier on the same calendar day. Confirmed costs $75 for general SkyMiles members, Silver Medallions and non-members; it is free for Diamond, Platinum and Gold Medallions and for Extra and refundable tickets. Main tickets need a seat in the same fare class.
Both are for Delta and Delta Connection flights only. Confirmed covers the U.S., Canada, Puerto Rico and the U.S. Virgin Islands; standby covers the U.S., Puerto Rico and the U.S. Virgin Islands. Neither allows a different origin or destination, a co-terminal airport such as LaGuardia to JFK, or a switch from a connection to a nonstop. Delta Basic is excluded from both, and paid seats or upgrades don't carry over.
American
American's same-day flight change confirms a seat on a different American flight on your day of departure, where eligible seats are available. It covers trips within and between the U.S., Puerto Rico, the U.S. Virgin Islands, Canada and the Caribbean, plus New York JFK to London Heathrow. The new flight must have the same airports and can be confirmed only within 24 hours of its departure.
Same-day standby is free for every customer, for an earlier American flight on the same route that day, but it doesn't guarantee a seat. Several AAdvantage elite tiers, oneworld Emerald, Sapphire and Ruby members and military fares get confirmed changes free; American notes this excludes Basic Economy tickets bought on or after May 18, 2026.
Southwest
On Choice, Choice Preferred and Choice Extra fares, same-day change and same-day standby are free; you pay only government taxes and fees, which are refunded if they don't apply. Basic fares don't include it.
Southwest's deadlines are strict. Change or list yourself at least 10 minutes before your original flight, or the no-show policy applies. In the app or on mobile web, do it at least 60 minutes before a new domestic flight or 90 minutes before an international one. Your original seat and boarding group aren't guaranteed on the new flight.
Don't forget your checked bag
Moving flights on the day doesn't always move your bag with you. United specifically tells travelers to confirm with an agent about an hour before the new flight that the bag is on board. When you use standby or a same-day change with a checked bag, ask at the counter or gate.
Plans changed and a new ticket makes more sense? A Traveling Deal agent can price a new flight on any major airline and tell you the total before you pay.
Call (855) 807-8304Frequently asked questions
Is flying standby free?
Yes at United, Delta and American for eligible tickets, and on Southwest Choice fares and above. Delta Basic and Southwest Basic don't include standby.
How much is a same-day change on Delta?
$75 for Same-Day Confirmed, waived for Diamond, Platinum and Gold Medallions and for Extra or refundable tickets. Same-Day Standby is free.
Can I change to a different airport on the same day?
Not with these same-day programs. United, Delta and American require the same origin and destination, and Delta also rules out co-terminals such as LaGuardia and JFK.
When does the same-day window open?
Delta's opens 24 hours before your original departure. United lets you pick a flight within 24 hours before or after yours. American confirms within 24 hours of the new flight's departure.
Can Traveling Deal move me to an earlier flight?
Only on tickets Traveling Deal issued. For tickets bought from an airline or another site, use that airline's app or the seller.
Sources
- United: Flight changes and standby
- Delta: Same-day flight changes
- American: Reservations and tickets FAQs
- Southwest: Fare types and benefits
More travel guides
Last checked November 1, 2026. Airlines change these rules without notice; the airline's own website is the final word for a ticket it issued.