Cheap flights from Southwest Airlines

Cheap Southwest Airlines tickets are best purchased 1.5–3 months before departure. Prices for domestic flights are usually lower around 1–2 months in advance, while for international destinations it's around 2–3 months in advance. During peak season, holidays, and school breaks, the cost of Southwest Airlines tickets increases closer to the departure date, so it's better to book in advance. You can conveniently compare prices for Southwest Airlines tickets across different dates and find the lowest fare using the price calendar on Aviasales.