Most majors, AA included, have a policy against hidden city ticketing...and have for years.
If you purchase a R/T ticket and use hidden city ticketing on the first leg....they may well void the other half of the ticket....and they have. It is addressed in the fine print of your Condition of Carriage.
TICKET VALIDITY - COMPLIANCE WITH TERMS AND CONDITIONS OF SALE
Tickets are valid for travel only when used in accordance with all terms and conditions of sale. Terms and conditions of sale include but are not limited to:
1. The passenger's itinerary, as stated on the ticket or in the passenger's reservation record,
2. Any requirement that the passenger stay over a specified date or length of time (for example, Saturday night or weekend) at the destination specified on the ticket.
3. Any special purpose or status (for example, age in the case of senior citizen or children's discounts, military status in the case of a military fare, official government business in the case of a government fare, or attendance at a qualified event in the case of a meeting or convention fare) that entitles the passenger to a special or reduced rate, or
4. Any other requirement associated with the passenger's fare level.
Unless a ticket is reissued by American or its authorized agent upon payment of applicable charges, or an authorized representative of American waives applicable restrictions in writing, a ticket is invalid:
1. If used for travel to a destination other than that specified on the ticket,
2. If the passenger fails to comply with applicable stay-over requirements,
3. If the passenger does not meet the purpose or status requirement associated with the fare category on the ticket, or
4. If American determines that the ticket has been purchased or used in a manner designed to circumvent applicable fare rules.
American specifically prohibits the practices commonly known as:
Back to Back Ticketing: The combination of two or more roundtrip excursion fares end to end for the purpose of circumventing minimum stay requirements.
Throwaway Ticketing: The usage of roundtrip excursion fare for one-way travel, and
Hidden City/Point Beyond Ticketing: Purchase of a fare from a point before the passenger's actual origin or to a point beyond the passenger's actual destination.
Duplicate and Impossible/Illogical Bookings: Duplicate or impossible/illogical American Airlines bookings are prohibited without prior authorization from American Airlines. A duplicate or impossible/illogical booking includes, but is not limited to, bookings for the same passenger on flights traveling on or about the same date between one or more of the same or nearby origin and/or destination (such as JFKDFW and LGADFW or DFWLAX and DFWONT), or bookings with connections that depart before the arrival of the inbound flight.
Fraudulent, Fictitious and Abusive Bookings: Fraudulent, fictitious and/or abusive bookings are prohibited. These types of bookings are defined as any bookings made without having been requested by or on behalf of the named passenger. Additionally, creating bookings to hold or block seats for the purpose of obtaining lower fares, AAdvantage award inventory, or upgrades that may not otherwise be available, or to gain access to airport facilities, or to circumvent any of American Airlines' fare rules or policies, is prohibited without prior authorization from American Airlines.
Where a ticket is invalidated as the result of the passenger's non-compliance with any term or condition of sale, American has the right in its sole discretion to:
1. Cancel any remaining portion of the passenger's itinerary,
2. Confiscate unused flight coupons,
3. Refuse to board the passenger or check the passenger's luggage,
4. Refuse to refund an otherwise refundable ticket, or
5.Assess the passenger for the reasonable remaining value of the ticket, which shall be no less than the difference between the fare actually paid and the lowest fare applicable to the passenger's actual itinerary.
Caveat Emptor.
Respectfully,
Playacaribe2