Flight crews typically create their schedules one month in advance by picking a bid line. A bid line is a list of schedule trips including crew pairings of flight attendants and pilots.  Crews can view the crew pairings along with the actual trips to see which is appealing to them. The crews will then record a list of trips they desire by sending a copy to the Crew Scheduling Department of that airline. You can pick International, or domestic. There are also reserve trips which would put a crew on call status. With the reserve trips you don't know who you will be flying with on any given day. They can also call you up to 2 hours in advance for a trip. However, if a crew get a normal bid line they will know in advance the cities they will be flying to as well as the crew pairings. Crews will typically fly together for that month. One thing worth mentioning is that everything in the airline industry is done by seniority. The higher you are in seniority the better the trips.