$162+ Cheap flights from Dulles Intl (IAD) to San Antonio (SAT)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SAT
Oct 1 — Oct 81
Round-trip
1 adult, Economy
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Find cheap flights from Dulles Intl to San Antonio with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Antonio are usually found in August or November, booked 61 days in advance, depart on a Thursday or Wednesday and return on a Thursday
Cheap flight deals from Dulles Intl to San Antonio
Cheapest
Best
Last-minute
One-way
Cheapest flights from Dulles Intl to San AntonioExplore the most affordable flight options available from Dulles Intl to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2026.
Explore the most affordable flight options available from Dulles Intl to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 1, 2026.
This Super.com deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:00 am -
1 stop16h 03m
Thu 9/2412:39 pm -
1 stop16h 41m
Deal found 8/27![Frontier logo]()
$307
This CheapOair deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/811:12 am -
1 stop22h 56m
Thu 10/1510:34 pm -
1 stop30h 46m
Deal found 8/31![Frontier logo]()
$308
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/65:54 pm -
1 stop5h 57m
Thu 10/85:58 pm -
1 stop5h 32m
Deal found 8/26![United Airlines logo]()
$309
This Super.com deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/166:00 am -
1 stop16h 49m
Sun 10/1810:34 pm -
1 stop30h 46m
Deal found 8/27![Frontier logo]()
$310
This CheapOair deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 am -
1 stop9h 20m
Thu 9/2412:39 pm -
1 stop16h 41m
Deal found 8/31![Frontier logo]()
$312
This Expedia deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/76:00 am -
1 stop9h 20m
Fri 10/910:34 pm -
1 stop30h 46m
Deal found 8/30![Frontier logo]()
$313
This Frontier deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:00 am -
1 stop9h 20m
Tue 9/223:19 pm -
1 stop14h 01m
Deal found 8/29![Frontier logo]()
$314
This CheapOair deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:00 am -
1 stop16h 03m
Fri 9/2510:05 am -
1 stop23h 12m
Deal found 8/28![Frontier logo]()
$316
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:00 pm -
Nonstop3h 38m
Sat 10/37:00 am -
Nonstop3h 20m
Deal found 8/27![United Airlines logo]()
$317
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1110:08 am -
1 stop6h 55m
Mon 12/1411:48 am -
1 stop5h 35m
Deal found 8/26![United Airlines logo]()
$319
This Trip.com deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/811:12 am -
1 stop22h 56m
Sat 10/102:47 pm -
1 stop14h 33m
Deal found 8/28![Frontier logo]()
$322
Best flights from Dulles Intl to San AntonioDiscover carefully curated flight deals from Dulles Intl to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 1, 2026.
Discover carefully curated flight deals from Dulles Intl to San Antonio that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 1, 2026.
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/302:38 pm -
1 stop5h 32m
Mon 11/212:24 pm -
Nonstop3h 11m
Deal found 8/26![United Airlines logo]()
$338
This Delta deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/133:00 pm -
1 stop5h 48m
Sun 11/156:30 am -
1 stop6h 24m
Deal found 8/27![Delta logo]()
$359
This United Airlines deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:00 pm -
Nonstop3h 38m
Sat 10/177:00 am -
Nonstop3h 20m
Deal found 8/28![United Airlines logo]()
$339
This United Airlines deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/148:25 am -
Nonstop3h 34m
Mon 9/215:30 pm -
1 stop6h 14m
Deal found 8/28![United Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:12 pm -
1 stop6h 14m
Tue 11/37:50 am -
1 stop5h 19m
Deal found 8/26![Delta logo]()
$437
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/198:25 am -
Nonstop3h 53m
Sun 11/227:00 am -
Nonstop3h 13m
Deal found 8/26![United Airlines logo]()
$394
This United Airlines deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/188:25 am -
Nonstop3h 34m
Mon 9/215:30 pm -
1 stop6h 14m
Deal found 8/26![United Airlines logo]()
$404
This United Airlines deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/138:25 am -
Nonstop3h 53m
Sat 11/148:56 am -
1 stop7h 59m
Deal found 8/30![United Airlines logo]()
$435
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/85:54 pm -
1 stop5h 57m
Thu 10/157:00 am -
Nonstop3h 20m
Deal found 8/27![United Airlines logo]()
$458
This United Airlines deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:00 pm -
Nonstop3h 38m
Tue 10/207:00 am -
Nonstop3h 20m
Deal found 8/28![United Airlines logo]()
$508
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/38:25 am -
Nonstop3h 34m
Sun 9/67:00 am -
Nonstop3h 20m
Deal found 8/27![United Airlines logo]()
$509
This United Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/158:30 am -
Nonstop3h 34m
Sun 10/185:58 pm -
1 stop5h 32m
Deal found 8/31![United Airlines logo]()
$554
Last-minute flights from Dulles Intl to San AntonioDiscover last-minute flight deals from Dulles Intl to San Antonio. Data last updated September 1, 2026 and is based on user searches.
Discover last-minute flight deals from Dulles Intl to San Antonio. Data last updated September 1, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:00 am -
1 stop9h 20m
Wed 9/163:19 pm -
1 stop14h 01m
Deal found 8/30![Frontier logo]()
$330
This Frontier deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/166:00 am -
1 stop9h 20m
Tue 9/223:19 pm -
1 stop14h 01m
Deal found 8/29![Frontier logo]()
$314
This Delta deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/173:15 pm -
1 stop6h 59m
Sun 9/206:10 pm -
1 stop5h 31m
Deal found 8/27![Delta logo]()
$324
This CheapOair deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1711:12 am -
1 stop22h 58m
Thu 9/2412:39 pm -
1 stop16h 41m
Deal found 8/31![Frontier logo]()
$328
This Expedia deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/186:00 am -
1 stop16h 03m
Mon 9/2110:05 am -
1 stop23h 12m
Deal found 8/28![Frontier logo]()
$329
This Super.com deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:00 am -
1 stop16h 03m
Thu 9/2412:39 pm -
1 stop16h 41m
Deal found 8/27![Frontier logo]()
$307
This CheapOair deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals ”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:00 am -
1 stop16h 03m
Fri 9/2510:05 am -
1 stop23h 12m
Deal found 8/28![Frontier logo]()
$316
This Super.com deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/226:00 am -
1 stop9h 20m
Thu 9/2412:39 pm -
1 stop16h 41m
Deal found 8/31![Frontier logo]()
$308
This CheapOair deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 am -
1 stop9h 20m
Thu 9/2412:39 pm -
1 stop16h 41m
Deal found 8/31![Frontier logo]()
$312
This CheapOair deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/236:00 am -
1 stop9h 20m
Thu 10/112:39 pm -
1 stop16h 41m
Deal found 8/27![Frontier logo]()
$325
This United Airlines deal was found by Cheapflights users on 8/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:00 pm -
Nonstop3h 38m
Sat 10/37:00 am -
Nonstop3h 20m
Deal found 8/27![United Airlines logo]()
$317
This Frontier deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/266:00 am -
1 stop8h 48m
Sat 10/32:47 pm -
1 stop14h 33m
Deal found 8/29![Frontier logo]()
$334
One-way flights from Dulles Intl to San AntonioSearch for one-way flight options from Dulles Intl to San Antonio. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
Search for one-way flight options from Dulles Intl to San Antonio. Find affordable one-way fares based on user searches. Data last updated September 1, 2026.
This Super.com deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/126:00 am -
1 stop8h 48m
Deal found 8/28![Frontier logo]()
$162
This CheapOair deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/216:00 am -
1 stop16h 03m
Deal found 8/31![Frontier logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/269:04 pm -
2 stops39h 40m
Deal found 8/29![Frontier logo]()
$166
This Kiwi.com deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/149:06 pm -
3 stops39h 52m
Deal found 8/29![Multiple Airlines logo]()
$167
This Super.com deal was found by Cheapflights users on 8/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/96:35 am -
1 stop8h 45m
Deal found 8/30![Frontier logo]()
$168
This Super.com deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/811:05 am -
1 stop23h 02m
Deal found 8/28![Frontier logo]()
$173
This Super.com deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/116:00 am -
1 stop31h 15m
Deal found 8/31![Frontier logo]()
$177
This Expedia deal was found by Cheapflights users on 8/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/1811:12 am -
1 stop22h 56m
Deal found 8/29![Frontier logo]()
$179
This Kiwi.com deal was found by Cheapflights users on 8/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/189:04 pm -
2 stops36h 41m
Deal found 8/28![Multiple Airlines logo]()
$183
Find flight deals from Dulles Intl to San Antonio
Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to San Antonio (SAT). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $307 (Super.com) |
One-way from | $162 (Super.com) |
Popular in | May |
Cheapest in | August |
Average price | $382 |
Good round-trip deal | $377 or less |
Good one-way deal | $261 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Dulles Intl to San Antonio that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 1, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Antonio that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Fri 10/30
2:38 pm-7:10 pm
1 stop5h 32m
San Antonio
Mon 11/2
12:24 pm-4:35 pm
Nonstop3h 11m
$338
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Sat 10/10
6:00 pm-8:38 pm
Nonstop3h 38m
San Antonio
Sat 10/17
7:00 am-11:20 am
Nonstop3h 20m
$339
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Fri 11/13
3:00 pm-7:48 pm
1 stop5h 48m
San Antonio
Sun 11/15
6:30 am-1:54 pm
1 stop6h 24m
$359
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Mon 9/14
8:25 am-10:59 am
Nonstop3h 34m
San Antonio
Mon 9/21
5:30 pm-12:44 am
1 stop6h 14m
$379
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Thu 11/19
8:25 am-11:18 am
Nonstop3h 53m
San Antonio
Sun 11/22
7:00 am-11:13 am
Nonstop3h 13m
$394
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Fri 9/18
8:25 am-10:59 am
Nonstop3h 34m
San Antonio
Mon 9/21
5:30 pm-12:44 am
1 stop6h 14m
$404
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Fri 11/13
8:25 am-11:18 am
Nonstop3h 53m
San Antonio
Sat 11/14
8:56 am-5:55 pm
1 stop7h 59m
$435
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Sun 11/1
6:12 pm-11:26 pm
1 stop6h 14m
San Antonio
Tue 11/3
7:50 am-2:09 pm
1 stop5h 19m
$437
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Thu 10/8
5:54 pm-10:51 pm
1 stop5h 57m
San Antonio
Thu 10/15
7:00 am-11:20 am
Nonstop3h 20m
$458
Washington, D.C.San Antonio
IAD Washington, D.C. Dulles Intl - SAT San Antonio
IADSAT
Washington, D.C. Dulles Intl
Sat 10/17
6:00 pm-8:38 pm
Nonstop3h 38m
San Antonio
Tue 10/20
7:00 am-11:20 am
Nonstop3h 20m
$508
Showing 1-10 of 21 resultsSorted by cheapest first
Compare providers for flights from Dulles Intl to San Antonio
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to San Antonio in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Antonio flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-San Antonio flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-San Antonio flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Antonio flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-San Antonio flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Dulles Intl to San Antonio
Have a flexible travel schedule? Discover the best time to fly to San Antonio from Dulles Intl with our price prediction graph.
IAD-SAT
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
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Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to San Antonio
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How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to San Antonio?
The best time to book flights from Washington, D.C. Dulles Intl Airport to San Antonio is 60 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Antonio?
Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Antonio (average of $337). Flying from Washington, D.C. Dulles Intl Airport to San Antonio in May is currently the most expensive (average of $479). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IAD to SAT?
Find hourly flight availability from Dulles Intl to San Antonio. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 1, 2026.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. Dulles Intl Airport to San Antonio as you normally would.
What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to San Antonio?
Share of 1-stop round-trip flights from Washington, D.C. Dulles Intl Airport to San Antonio chosen by Cheapflights users in the past 12 months, using the same layover each way.
Las Vegas (LAS) – chosen by Cheapflights users on 67% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to San Antonio on Cheapflights.
What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to San Antonio?
Average round-trip fare for 1-stop flights from Washington, D.C. Dulles Intl Airport to San Antonio, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Las Vegas (LAS) is the most affordable 1-stop option, with an average round-trip price of $409.
What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to San Antonio?
Shortest average travel time for 1-stop one-way flights from Washington, D.C. Dulles Intl Airport to San Antonio, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Atlanta (ATL) have the shortest average one-way travel time for 1-stop routes: 6h 10m.
Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to San Antonio?
Average layover duration for 1-stop one-way flights from Washington, D.C. Dulles Intl Airport to San Antonio, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Atlanta (ATL) offer the fastest connection on this route, with an average layover time of 2h 02m.
The best insider tips for Washington, D.C. Dulles Intl Airport to San Antonio flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to San Antonio trip
Our travel experts
Reviews of airlines servicing San Antonio
Get insights into the airlines that provide service to San Antonio. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to San Antonio. Reviews last updated September 1, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Washington, D.C. Dulles Intl Airport to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Food
7.0
Crew
8.6
Overall
8.0
Boarding
8.1
Comfort
8.0
Entertainment
7.5
Reviews
1 / 20
2.0
MediocreMike,Aug 2025
OKC - AUS
Related info for your journey
Find useful and relevant information for your journey from Dulles Intl to San Antonio. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Antonio?
Book flights to San Antonio if you plan to visit one of these locationsNew Braunfels
Kerrville
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Dulles Intl and San Antonio flights
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Top 4 airlines flying from Dulles Intl to San Antonio
Discover the top 4 airlines that operate flights from Dulles Intl to San Antonio. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$132 | Average$260 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$249 | Average$403 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$268 | Average$333 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$312 | Average$368 | FlexibilityNo cancel fee | On-time63% |