$115+ Cheap flights from San Antonio (SAT) to Dulles Intl (IAD)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/14. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — IAD
Oct 28 — Nov 41
Round-trip
1 adult, Economy
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Find cheap flights from San Antonio to Dulles Intl 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 San Antonio to Washington, D.C. Dulles Intl are usually found in April or February, booked 78 days in advance, depart on a Thursday or Saturday and return on a Thursday
Cheap flight deals from San Antonio to Dulles Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from San Antonio to Dulles IntlExplore the most affordable flight options available from San Antonio to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
Explore the most affordable flight options available from San Antonio to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 28, 2026.
This Cheapflightsfares deal was found by Cheapflights users on 9/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1412:27 pm -
1 stop8h 02m
Mon 12/218:20 pm -
1 stop25h 06m
Deal found 9/24![Frontier logo]()
$302
This Frontier deal was found by Cheapflights users on 9/26. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/2512:06 pm -
1 stop7h 34m
Fri 11/271:09 pm -
1 stop9h 07m
Deal found 9/26![Frontier logo]()
$304
This United Airlines deal was found by Cheapflights users on 9/24. 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.
Wed 10/217:00 am -
Nonstop3h 20m
Mon 10/263:37 pm -
1 stop8h 58m
Deal found 9/24![United Airlines logo]()
$305
This United Airlines deal was found by Cheapflights users on 9/27. 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.
Tue 12/17:00 am -
Nonstop3h 13m
Tue 12/88:30 am -
1 stop5h 36m
Deal found 9/27![United Airlines logo]()
$306
This United Airlines deal was found by Cheapflights users on 9/24. 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 12/2411:50 am -
1 stop5h 46m
Wed 12/306:00 am -
1 stop5h 51m
Deal found 9/24![United Airlines logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 9/28. 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.
Mon 11/910:13 am -
1 stop23h 08m
Tue 11/109:06 pm -
2 stops23h 19m
Deal found 9/28![Frontier logo]()
$308
This Frontier deal was found by Cheapflights users on 9/24. 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 10/63:19 pm -
1 stop14h 01m
Sat 10/176:00 am -
1 stop8h 52m
Deal found 9/24![Frontier logo]()
$309
This Cheapflightsfares deal was found by Cheapflights users on 9/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/210:13 am -
1 stop23h 08m
Sun 11/811:16 am -
1 stop23h 02m
Deal found 9/27![Frontier logo]()
$310
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/225:58 pm -
1 stop5h 32m
Thu 10/292:38 pm -
1 stop5h 32m
Deal found 9/24![United Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/225:58 pm -
1 stop5h 32m
Tue 10/278:34 am -
1 stop5h 42m
Deal found 9/25![United Airlines logo]()
$313
This United Airlines deal was found by Cheapflights users on 9/26. 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 11/247:00 am -
Nonstop3h 13m
Thu 12/38:20 am -
Nonstop3h 54m
Deal found 9/26![United Airlines logo]()
$314
Best flights from San Antonio to Dulles IntlDiscover carefully curated flight deals from San Antonio to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
Discover carefully curated flight deals from San Antonio to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 28, 2026.
This United Airlines deal was found by Cheapflights users on 9/24. 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 12/2411:50 am -
1 stop5h 46m
Wed 12/306:00 am -
1 stop5h 51m
Deal found 9/24![United Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 9/27. 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 11/65:15 am -
1 stop5h 19m
Sat 11/146:00 am -
1 stop7h 39m
Deal found 9/27![Delta logo]()
$334
This United Airlines deal was found by Cheapflights users on 9/28. 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 11/167:00 am -
Nonstop3h 13m
Tue 11/248:25 am -
Nonstop3h 53m
Deal found 9/28![United Airlines logo]()
$314
This United Airlines deal was found by Cheapflights users on 9/24. 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 12/57:00 am -
Nonstop3h 13m
Mon 12/73:37 pm -
1 stop8h 20m
Deal found 9/24![United Airlines logo]()
$342
This Delta deal was found by Cheapflights users on 9/25. 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.
Wed 11/45:15 am -
1 stop5h 19m
Mon 11/95:00 pm -
1 stop6h 06m
Deal found 9/25![Delta logo]()
$379
This United Airlines deal was found by Cheapflights users on 9/26. 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 12/1711:50 am -
1 stop5h 46m
Thu 12/248:20 am -
Nonstop4h 02m
Deal found 9/26![United Airlines logo]()
$344
This United Airlines deal was found by Cheapflights users on 9/27. 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.
Tue 12/17:00 am -
Nonstop3h 13m
Tue 12/88:20 am -
Nonstop3h 54m
Deal found 9/27![United Airlines logo]()
$356
This United Airlines deal was found by Cheapflights users on 9/28. 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.
Wed 12/912:12 pm -
Nonstop3h 13m
Mon 12/145:55 pm -
Nonstop3h 54m
Deal found 9/28![United Airlines logo]()
$379
This United Airlines deal was found by Cheapflights users on 9/28. 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.
Fri 10/235:58 pm -
1 stop5h 32m
Mon 10/265:30 pm -
Nonstop3h 54m
Deal found 9/28![United Airlines logo]()
$444
This United Airlines deal was found by Cheapflights users on 9/24. 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 11/35:30 am -
1 stop4h 58m
Fri 11/62:38 pm -
1 stop5h 32m
Deal found 9/24![United Airlines logo]()
$447
Last-minute flights from San Antonio to Dulles IntlDiscover last-minute flight deals from San Antonio to Dulles Intl. Data last updated September 28, 2026 and is based on user searches.
Discover last-minute flight deals from San Antonio to Dulles Intl. Data last updated September 28, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 9/24. 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 10/63:19 pm -
1 stop14h 01m
Sat 10/176:00 am -
1 stop8h 52m
Deal found 9/24![Frontier logo]()
$309
This Cheapflightsfares deal was found by Cheapflights users on 9/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/102:47 pm -
1 stop14h 33m
Tue 10/1311:12 am -
1 stop22h 56m
Deal found 9/26![Frontier logo]()
$316
This CheapOair deal was found by Cheapflights users on 9/25. 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 10/1510:34 pm -
1 stop30h 46m
Mon 10/266:00 am -
1 stop16h 49m
Deal found 9/25![Frontier logo]()
$314
This Trip.com deal was found by Cheapflights users on 9/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/1510:34 pm -
1 stop30h 46m
Thu 10/226:00 am -
1 stop31h 15m
Deal found 9/26![Frontier logo]()
$320
This United Airlines deal was found by Cheapflights users on 9/24. 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.
Wed 10/217:00 am -
Nonstop3h 20m
Mon 10/263:37 pm -
1 stop8h 58m
Deal found 9/24![United Airlines logo]()
$305
This Mytrip deal was found by Cheapflights users on 9/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2110:03 am -
2 stops13h 18m
Mon 10/269:06 pm -
2 stops23h 19m
Deal found 9/24![Frontier logo]()
$321
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/225:58 pm -
1 stop5h 32m
Thu 10/292:38 pm -
1 stop5h 32m
Deal found 9/24![United Airlines logo]()
$311
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/225:58 pm -
1 stop5h 32m
Tue 10/278:34 am -
1 stop5h 42m
Deal found 9/25![United Airlines logo]()
$313
This Mytrip deal was found by Cheapflights users on 9/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2310:34 pm -
2 stops24h 47m
Fri 10/309:06 pm -
2 stops23h 19m
Deal found 9/25![Frontier logo]()
$318
This Mytrip deal was found by Cheapflights users on 9/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/298:20 pm -
2 stops26h 23m
Tue 11/39:06 pm -
2 stops23h 19m
Deal found 9/25![Frontier logo]()
$315
One-way flights from San Antonio to Dulles IntlSearch for one-way flight options from San Antonio to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
Search for one-way flight options from San Antonio to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 28, 2026.
This Frontier deal was found by Cheapflights users on 9/24. 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.
Mon 12/1412:27 pm -
1 stop8h 02m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Frontier logo]()
$115
This Super.com deal was found by Cheapflights users on 9/25. 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 10/1910:34 pm -
1 stop30h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Frontier logo]()
$117
This CheapOair deal was found by Cheapflights users on 9/23. 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 10/1510:34 pm -
1 stop30h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Frontier logo]()
$120
This Mytrip deal was found by Cheapflights users on 9/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1410:03 am -
1 stop23h 14m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![Frontier logo]()
$121
This Kiwi.com deal was found by Cheapflights users on 9/25. 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 10/3012:38 pm -
3 stops27h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![Multiple Airlines logo]()
$133
This United Airlines deal was found by Cheapflights users on 9/28. 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 10/1912:10 pm -
Nonstop3h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/28![United Airlines logo]()
$135
This United Airlines deal was found by Cheapflights users on 9/25. 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 10/249:00 am -
1 stop7h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/25![United Airlines logo]()
$140
This Super.com deal was found by Cheapflights users on 9/27. 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 11/2312:06 pm -
1 stop7h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/27![Frontier logo]()
$142
This Super.com deal was found by Cheapflights users on 9/24. 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 10/1610:34 pm -
1 stop30h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Frontier logo]()
$143
This Super.com deal was found by Cheapflights users on 9/24. 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 10/1810:34 pm -
1 stop30h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/24![Frontier logo]()
$144
This United Airlines deal was found by Cheapflights users on 9/23. 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 10/202:25 pm -
1 stop7h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![United Airlines logo]()
$145
Find flight deals from San Antonio to Dulles Intl
Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Dulles Intl (IAD). 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 28, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $302 (Cheapflightsfares) |
One-way from | $115 (Frontier) |
Popular in | December |
Cheapest in | April |
Average price | $399 |
Good round-trip deal | $414 or less |
Good one-way deal | $248 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San Antonio to Dulles Intl 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 28, 2026.
Use the filters below to find and compare flights from San Antonio to Washington, D.C. Dulles Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Thu 11/26
12:24 pm-4:35 pm
Nonstop3h 11m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$135
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Tue 11/3
7:00 am-11:13 am
Nonstop3h 13m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$135
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Wed 10/14
12:10 pm-4:30 pm
Nonstop3h 20m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$135
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Mon 10/19
7:00 am-11:20 am
Nonstop3h 20m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$135
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Sat 10/24
9:00 am-5:35 pm
1 stop7h 35m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$140
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Wed 11/4
8:56 am-5:55 pm
1 stop7h 59m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$140
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Tue 10/20
5:58 pm-12:30 am
1 stop5h 32m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$145
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Tue 11/10
5:30 am-11:37 am
1 stop5h 07m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$168
Quickest round-trip
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Wed 12/23
7:10 am-11:20 am
Nonstop3h 10m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$178
San AntonioWashington, D.C.
SAT San Antonio - IAD Washington, D.C. Dulles Intl
SATIAD
San Antonio
Mon 12/28
12:38 pm-8:19 am
2 stops42h 41m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$268
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from San Antonio to Dulles Intl
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 San Antonio to Dulles Intl in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star |
- Most accurate provider: When it comes to deals on San Antonio-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on San Antonio-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from San Antonio-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Antonio-Washington, D.C. Dulles Intl Airport 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 San Antonio-Washington, D.C. Dulles Intl Airport 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 San Antonio to Dulles Intl
Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from San Antonio with our price prediction graph.
SAT-IAD
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 San Antonio to Washington, D.C. Dulles Intl Airport
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How far ahead should I book a flight from San Antonio to Washington, D.C. Dulles Intl Airport?
The best time to book flights from San Antonio to Washington, D.C. Dulles Intl Airport is 76 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 San Antonio to Washington, D.C. Dulles Intl Airport?
Currently, April is the cheapest month in which you can book a flight from San Antonio to Washington, D.C. Dulles Intl Airport (average of $326). Flying from San Antonio to Washington, D.C. Dulles Intl Airport in December is currently the most expensive (average of $443). 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 SAT to IAD?
Find hourly flight availability from San Antonio to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 28, 2026.
When flying from San Antonio to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
The best insider tips for San Antonio to Washington, D.C. Dulles Intl Airport 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 San Antonio to Washington, D.C. Dulles Intl Airport trip
Our travel experts
Reviews of airlines servicing Dulles Intl
Get insights into the airlines that provide service to Dulles Intl. 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 Dulles Intl. Reviews last updated September 28, 2026.
Read through reviews of airlines operating flights from San Antonio to Washington, D.C. Dulles Intl Airport, such as Delta,United Airlines, andAmerican Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentStacey-Ann,Aug 2023
IAH - ATL
Boarding
8.1
Overall
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentStacey-Ann,Aug 2023
IAH - ATL
Boarding
8.1
Overall
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentStacey-Ann,Aug 2023
IAH - ATL
Boarding
8.1
Overall
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentStacey-Ann,Aug 2023
IAH - ATL
Related info for your journey
Find useful and relevant information for your journey from San Antonio to Dulles Intl. 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 Washington, D.C. Dulles Intl Airport?
Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locationsAlexandria
Arlington
Owings Mills
Lanham
Tysons
Chantilly
Woodbridge
Reston
Herndon
Hyattsville
Rockville
Fredericksburg
Falls Church
Sterling
Hanover
Laurel
Springfield
Oxon Hill
Clinton
Hunt Valley
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Other flights to Dulles Intl
Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.
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San Antonio and Dulles Intl flights
Browse other San Antonio and Dulles Intl flight options. Last updated on September 28, 2026.
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Browse through other flights departing from San Antonio. Flights are based on user searches made on Cheapflights and were last updated on September 28, 2026.
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Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from San Antonio to Dulles Intl
Discover the top 3 airlines that operate flights from San Antonio to Dulles Intl. 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 28, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$185 | Average$388 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$249 | Average$393 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$288 | Average$418 | FlexibilityNo cancel fee | On-timeN/A |