$90 Cheap United flights Washington (IAD) to San Antonio (SAT)

Make use of the “Price (lowest to highest)” filter on Expedia to look for cheap United Airlines return flights from $179 from IAD to SAT. Affordable one-way fares from $90 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.

Search for one-way or return flights to San Antonio in January or September. You could find lower fares with United Airlines during these off-peak months.

For cheap United Airlines fares from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT), 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 affect the cost. Sunday is generally the cheapest, while Monday is often the most expensive for domestic flights. You can save 6% on average by booking your flight 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.

United Airlines offers direct flights from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT), with 14 weekly departures. Simply use the “Nonstop” and “Airline” filters during your search on Expedia to see all direct United Airlines flights to SAT.

Depart Washington Dulles Intl. Airport (IAD) for San Antonio Intl. Airport (SAT) on a direct United Airlines flight, and you’ll be airborne for approximately 3h 57m.

Thursday has the most United Airlines flights from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT). With 2 daily departures, this is a great day to find something that will suit your schedule.

Jetting off from IAD at 8:15AM UTC-5, the earliest United Airlines flight to SAT lands at 11:12AM UTC-6. Flying earlier in the day means you’ll be less likely to encounter delays or cancellations.* Prefer to travel later? The last United Airlines flight from IAD to SAT departs at 5:24PM UTC-5 and touches down at 8:21PM UTC-6.*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.

San Antonio Intl. Airport (SAT) is the primary San Antonio hub for United Airlines flights from Washington Dulles Intl. Airport (IAD).

With a rewarding loyalty program, United Airlines is a favorite of many passengers heading from IAD to SAT. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you could earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

United Airlines generally uses Boeing 737-800 planes for flights from Washington Dulles Intl. Airport (IAD) to San Antonio Intl. Airport (SAT). This airline also operates the Boeing 737-700 on this route. Bear in mind that aircraft type can vary due to operational demands, so the plane you board could be different on your travel date.

You can usually reschedule or cancel your flight, although additional charges may apply if your booking was made more than 24 hours ago. Need flexible options? Make use of our “No cancel fee” and “Changes included” filters to find flights that won’t charge extra if you have to adjust your plans. To modify your booking, go to “Trips,” select your flight and click on “Manage Booking” for further information.