There are a few ways to get a guaranteed “A” boarding position before your flight:
1.  Purchase Upgraded Boarding: This option is available starting 24 hours before the flight’s local departure time and allows Customers to upgrade their boarding position to A1-A15 depending on availability.
Purchase Upgraded Boarding
2.  Purchase a Business Select fare or upgrade to Business Select: Customers who purchase a Business Select fare will get guaranteed A1-A15 boarding. If a Customer did not originally purchase a Business Select fare but wants guaranteed A1-A15 boarding, they can upgrade their flight to Business Select.
Upgrade flight to Business Select
Note: Customers who purchase Business Select fares will be ahead of Customers who purchase Upgraded Boarding. If Business Select is sold out on a flight segment, Upgraded Boarding will not be available.