Same-Day Flight Changes & Standby by Airline (2026)

A same-day flight change and same-day standby are two different levers, and telling them apart saves money on the day you travel.

A same-day confirmed change moves you to a guaranteed seat on another flight the same day, usually for a flat fee. Same-day standby only lists you for one, usually for free, and you fly as booked if no seat opens.

What you pay turns on the airline, your fare and your status. As of August 2026, those rules changed at nearly every U.S. carrier.

Same-day flight change vs same-day standby: what you actually get

Start with the distinction, because the fee tables only make sense once you have it.

A confirmed change is a new booking. You give up your old seat and receive a guaranteed one on a different flight the same day, in the cabin you paid for.

Standby is a waitlist. You keep your original flight until a seat opens on the one you would rather take.

When can you make a same-day change?

Both levers open close to departure, not when you book. On most airlines the window starts about 24 hours before your flight, at online check-in or in the app.

That timing causes a common mix-up, because there are two different 24-hour rules in play.

The refund rule applies when you book at least seven days out, directly from the airline. It is the only guaranteed route to cash, and it is covered in the other 24-hour rule.

Standby has its own clock at the airport, and each carrier sets it differently.

• American: list for standby at the counter or gate at least 45 minutes before departure.
• United: standby seats are assigned 30 minutes before a domestic flight, 60 minutes before an international one.
• Delta: request at online check-in or in the Fly Delta app, within 24 hours of departure.
• Southwest: act at least 10 minutes before your original flight, and 60 minutes (domestic) or 90 minutes (international) before the new one.
• JetBlue: standby is airport-only and cannot be listed online or by phone.

United: no flat fee anymore, just the fare difference

As of August 2026, United no longer publishes a flat same-day change fee. Its flight-change page frames the cost as the price difference instead.

Premier members can get a confirmed same-day change for free when their original fare class is open on the new flight. If that class is sold out, they pay the difference.

Everyone else pays the fare difference too, even when the same cabin is available. Standby, by contrast, is free to join for all travelers.

Basic Economy is the exception at both ends. You cannot change a Basic Economy ticket unless you upgrade the fare first, which shuts it out of same-day changes and standby alike.

That is separate from repricing a fare after the price drops, which is a different lever. If you fly United often, see how United repricing works.

Delta: $75 confirmed, free for Gold Medallion and up

Delta charges $75 for a same-day confirmed change, which moves you to a guaranteed seat in the fare class you originally bought. Its same-day change page spells out the terms.

The fee is waived for Diamond, Platinum and Gold Medallion members and for Extra and refundable tickets. Same-day standby is free for everyone.

Delta now describes the change in its updated cabin names, from Delta Main and Delta Comfort up to Delta One. The cheapest fare, which Delta labels Delta Basic, is excluded from both the confirmed change and standby.

American: same-day changes now start at $60

American's same-day confirmed change now starts at $60 in the U.S., Puerto Rico and the U.S. Virgin Islands, and starts at $150 between JFK and London Heathrow. Its same-day travel page uses that starting-at language because the price varies by market.

Same-day standby is free in those U.S. markets. It is not offered on Canada and Caribbean routes or on the JFK to London run.

One American rule trips people up: anyone can stand by for an earlier flight, but only AAdvantage status members can stand by for a later one the same day.

Alaska: $50 or $75, and Saver is mostly shut out

Alaska charges $50 for a same-day confirmed change on its Seattle to Portland nonstops and Washington to Oregon intrastate flights, and $75 elsewhere, as of August 2026. There is no fare difference on top.

Saver fares can still take a confirmed change, but they cost $40 more and get no standby at any status. Standard fares get free standby.

The fee is waived for refundable First and Main Cabin fares, for Atmos Gold, Platinum and Titanium members, and for Atmos Summit Visa Infinite cardholders.

JetBlue: same-day switch and standby are $100 (free for Mosaic and Flex)

After JetBlue's July 30, 2026 fare overhaul, a same-day switch and same-day standby each cost $100 per person on Base and standard fares. Its fees page lists both at that flat rate, with no fare difference on top.

Both are free on Flex fares and waived for Mosaic members. A standby fee is refunded if you are not cleared onto the flight.

JetBlue standby is airport-only. You cannot list for standby online or by phone, and you list on a sold-out flight between the same cities the same day.

Southwest: free on Choice fares, nothing for Basic

Southwest charges no same-day fee at all. Instead, free same-day change and standby come bundled into its Choice, Choice Preferred and Choice Extra fares, per its same-day page.

Basic fares are not eligible for a free same-day change. You would have to buy up to a qualifying fare first.

Southwest flips the usual pattern: the benefit follows the fare you bought, not your status. A-List and A-List Preferred members can stand by even on a Basic fare, but that status still does not unlock a free same-day change on Basic.

You keep your fare when you switch, paying only government taxes and fees, which are refunded. Repricing after a Southwest price drop is a separate move, covered in how Southwest repricing works.

A same-day change is not the same as a price drop

Every fee on this page is about switching between flights on the day you fly. None of it touches a fare that falls after you book, which is a separate and quieter kind of money.

When a flight you already booked drops in price, the difference does not come back on its own. Autopilot tracks your booked fare after you add a trip and reprices it when the price drops, so you keep the difference as credit or a refund.

Which fares are shut out: Basic Economy, Delta Basic, Alaska Saver

One pattern runs through every table above. The cheapest fare at each airline is the one locked out of most same-day flexibility.

• United Basic Economy: cannot be changed unless you upgrade the fare first, so no same-day change and no standby.
• Delta Basic: excluded from both the same-day confirmed change and standby.
• American Basic Economy: not eligible for same-day confirmed changes.
• Alaska Saver: can take a confirmed change for $40 more, but gets no standby at any status.
• Southwest Basic: no free same-day change; standby only if you hold A-List or A-List Preferred status.

If you booked one of these fares, the same-day door is mostly closed, though the reasons differ by airline. The trade-offs of buying basic in the first place are in why the cheapest fares are shut out.

How do you get on a standby list?

The mechanics are similar across airlines, and none of them require anything clever. You are asking to be added to a waitlist for a seat that may open.

1. 1

   Confirm your fare qualifies

   Check that your fare and status are eligible for standby on your airline, using the table above.
2. 2

   Request within the window

   List online or in the app where allowed, or ask at the ticket counter or gate. Watch each airline's cutoff, from American's 45 minutes to Southwest's 60 minutes domestic.
3. 3

   Keep your original seat until you clear

   Your booked flight stays confirmed until a seat opens on the flight you want, so you are not stranded if standby does not come through.

For the full mechanics of clearing a list, including how priority order works, see how to actually get on a standby list.

What if the airline changes or cancels your flight?

Same-day changes and standby are about seats you choose to move. When the airline is the one that cancels or significantly changes your flight, the rules shift in your favor.

Under U.S. Department of Transportation rules, if the airline cancels or significantly changes your flight and you decline the rebooking, you are owed a cash refund regardless of fare class, per the DOT. Basic Economy is included.

Airlines keep renaming cabins and re-pricing these options, so the fee you find today may not be the fee next season. Confirm your own fare's terms on the airline's page before you count on a same-day change or standby.