$90 Cheap Southwest Airlines flights Denver (DEN) to Long Beach (LGB)

Landing cheap one-way Southwest Airlines flights from DEN to LGB from $90 on Expedia is easy — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly return fares from $179 for your next exciting vacation.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.

To find cheap Southwest Airlines fares from Denver Intl. Airport (DEN) to Long Beach Municipal Airport (LGB), start searching one to three months before your planned departure. Securing domestic flights 34 to 86 days in advance could save you 25% compared to booking just 6 to 12 days ahead. The day you book can also impact the cost. Sunday is generally the most affordable, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your journey on a Sunday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.

The earliest Southwest Airlines flight from DEN to LGB departs at 7:00AM UTC-7, touching down at 8:45AM UTC-8. If you prefer to jet off later, the last Southwest Airlines flight leaves DEN at 7:20PM UTC-7 and touches down at LGB at 8:55PM UTC-8. Flying early is generally a good idea as morning flights are least likely to face cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.