Cheap Southwest Airlines flights Houston (IAH) to San Francisco (SFO)

Set the “Price (lowest to highest)” filter on Expedia to look for cheap Southwest Airlines return flights from IAH to SFO. Affordable one-way options are also available.**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.

Southwest Airlines flights to San Francisco are often cheaper in the low-season months of February and April. Whether you’re searching for a return or one-way ticket, you could score a better deal then.

For cheap Southwest Airlines fares from George Bush Intercontinental Airport (IAH) to San Francisco Intl. Airport (SFO), 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 price you pay. Sunday is usually the cheapest, 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.

Use our “Nonstop” filter when looking for direct Southwest Airlines flights from IAH to SFO. It’s also a great way to compare other carriers servicing the same nonstop trip.

To find the earliest departure from IAH to SFO with Southwest Airlines, sort your results by “Morning” and “Early Morning.” Booking an early flight usually means you’re less likely to experience 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.

Southwest Airlines flights from George Bush Intercontinental Airport (IAH) to San Francisco come in to San Francisco Intl. Airport (SFO). This is the main entry point to this destination.

Changes are typically free within 24 hours of making your booking, but your airline may charge a fee after that time. For more details about altering your reservation, go to your “Trips,” select your flight and click on “Manage Booking.” If you want the freedom to adjust your plans without additional charges, tick the “Changes included” or “No cancel fee” filter when planning your next trip.