United's Basic Economy is the lowest-priced option for those looking to save on airfare. However, it comes with some restrictions, particularly around united airline seat selection. Passengers who purchase Basic Economy tickets cannot select their seat ahead of time. Instead, seats are randomly assigned at check-in, typically within 24 hours before departure. If you're willing to trade the ability to choose your seat for a more budget-friendly fare, this option might suit your needs, but it can be less convenient for families or groups who want to sit together.