How Far In Advance Can You Book A Flight On Southwest Airlines. If for some reason you forget to change or cancel, it may result in your travel funds for that flight being forfeited. (doesn't apply to major holiday travel periods.)
It's not going to open up until spring of next year. Most us carriers allow you to book cash tickets up to 11 months in advance. You can change or cancel your flight up until 10 minutes before your scheduled departure time.
Know before you go by checking your flight status online.
Southwest airlines is offering 50 percent off fall flights—here’s how to book. You can book a flight about 330 days in advance with many of the domestic airlines, but southwest airlines works differently. Know before you go by checking your flight status online. Booking far in advance also can be very pricey.