What is a standby flight?
Flying standby means waiting for a seat on a flight you are not confirmed on, and boarding only if one is left once confirmed passengers are aboard. It is used to move to an earlier flight, and by airline staff travelling on discounted tickets.
Standby flight explained
Two quite different situations share the name. Same day standby lets a passenger who already holds a ticket try for an earlier or later flight on the same route and date. Staff standby is a benefit for airline employees and their families, priced very low and cleared last of all.
Priority decides everything. Airlines clear their standby list in an order that reflects status, fare class and how the passenger came to be on the list, and staff travelers sit at the bottom. On a full flight the list simply does not clear, which is why standby works far better on routes with several daily departures.
The rules on same day changes have moved considerably. Several US carriers now allow same day standby free of charge for elite members and on more expensive fare classes, while others still charge a fixed fee. Discounted and basic fares are frequently excluded altogether.
For a premium cabin ticket the practical value is different again. A business class passenger going standby usually only clears into business class if that cabin has space, since airlines are reluctant to seat a confirmed premium passenger in economy on a voluntary change. Asking what happens if only economy is open is worth doing before committing to the earlier flight.
More on standby flight
It depends on the airline and the fare. Several US carriers offer free same day standby to elite members and on higher fare classes, while others charge a fixed fee and exclude discounted fares entirely.
Airlines clear it in priority order, usually weighing elite status, fare class and the reason for being listed. Airline staff travelling on discounted tickets are cleared last, after all paying passengers.
Usually only if the business cabin has space. Airlines are generally unwilling to move a confirmed premium passenger into economy for a voluntary change, so a full front cabin means the standby does not clear.
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