$222+ Cheap flights from San José (SJO) 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 11/3. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — IAD
Oct 8 — Oct 151
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from San José 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 José Juan Santamaria Intl to Washington, D.C. Dulles Intl are usually found in October or November, booked 71 days in advance, depart on a Tuesday or Thursday and return on a Thursday
Cheap flight deals from San José to Dulles Intl
Cheapest
Best
Last-minute
One-way
Cheapest flights from San José to Dulles IntlExplore the most affordable flight options available from San José to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 8, 2026.
Explore the most affordable flight options available from San José to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 8, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Thu 10/225:55 pm -
1 stop8h 25m
Thu 10/292:25 am -
1 stop6h 59m
Deal found 9/3![Copa Airlines logo]()
$346
This United Airlines deal was found by Cheapflights users on 9/4. 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 11/72:15 pm -
Nonstop4h 44m
Thu 11/126:00 am -
1 stop15h 39m
Deal found 9/4![United Airlines logo]()
$361
This Copa Airlines deal was found by Cheapflights users on 9/7. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:03 am -
1 stop12h 29m
Sat 10/311:36 am -
1 stop9h 31m
Deal found 9/7![Copa Airlines logo]()
$363
This Avianca deal was found by Cheapflights users on 9/4. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/13:10 pm -
1 stop9h 25m
Thu 11/52:30 am -
1 stop7h 05m
Deal found 9/4![Avianca logo]()
$364
This Avianca deal was found by Cheapflights users on 9/4. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/205:10 am -
1 stop8h 45m
Sun 11/224:35 am -
1 stop7h 50m
Deal found 9/4![Avianca logo]()
$365
This United Airlines deal was found by Cheapflights users on 9/7. 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 9/178:45 am -
1 stop14h 12m
Wed 10/146:15 am -
1 stop8h 06m
Deal found 9/7![United Airlines logo]()
$366
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/267:45 am -
1 stop12h 59m
Sat 10/318:59 am -
Nonstop5h 01m
Deal found 9/7![United Airlines logo]()
$371
This Kissandfly.com deal was found by Cheapflights users on 9/7. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:15 pm -
Nonstop4h 44m
Sat 11/75:56 pm -
1 stop13h 29m
Deal found 9/7![Lufthansa logo]()
$372
This Avianca deal was found by Cheapflights users on 9/5. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/17:45 pm -
1 stop6h 30m
Tue 11/32:30 am -
1 stop7h 05m
Deal found 9/5![Avianca logo]()
$374
This United Airlines deal was found by Cheapflights users on 9/7. 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 9/178:45 am -
1 stop14h 12m
Sun 9/276:15 am -
1 stop15h 22m
Deal found 9/7![United Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/315:55 pm -
1 stop8h 20m
Fri 11/61:16 am -
1 stop8h 03m
Deal found 9/3![Copa Airlines logo]()
$377
Best flights from San José to Dulles IntlDiscover carefully curated flight deals from San José to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.
Discover carefully curated flight deals from San José to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 8, 2026.
This Copa Airlines deal was found by Cheapflights users on 9/3. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/253:59 am -
1 stop22h 17m
Mon 3/11:24 am -
1 stop10h 36m
Deal found 9/3![Copa Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 9/6. 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 12/241:15 am -
1 stop9h 15m
Wed 12/3010:54 pm -
1 stop24h 38m
Deal found 9/6![United Airlines logo]()
$366
This Copa Airlines deal was found by Cheapflights users on 9/4. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/205:55 pm -
1 stop8h 25m
Mon 10/262:25 am -
1 stop10h 33m
Deal found 9/4![Copa Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Sun 10/257:45 am -
1 stop14h 52m
Thu 10/2910:10 pm -
1 stop24h 50m
Deal found 9/6![United Airlines logo]()
$366
This Copa Airlines deal was found by Cheapflights users on 9/5. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/234:08 am -
1 stop22h 12m
Sat 10/311:36 am -
1 stop11h 23m
Deal found 9/5![Copa Airlines logo]()
$363
This United Airlines deal was found by Cheapflights users on 9/6. 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.
Sun 11/111:28 pm -
1 stop20h 59m
Sat 11/78:59 am -
Nonstop5h 01m
Deal found 9/6![United Airlines logo]()
$387
This Copa Airlines deal was found by Cheapflights users on 9/7. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/118:44 am -
1 stop17h 31m
Fri 11/131:16 am -
1 stop10h 43m
Deal found 9/7![Copa Airlines logo]()
$363
This Copa Airlines deal was found by Cheapflights users on 9/3. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/235:51 pm -
1 stop8h 25m
Tue 3/91:14 am -
1 stop13h 06m
Deal found 9/3![Copa Airlines logo]()
$363
This Copa Airlines deal was found by Cheapflights users on 9/4. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/228:45 am -
1 stop17h 35m
Mon 10/262:25 am -
1 stop7h 54m
Deal found 9/4![Copa Airlines logo]()
$363
This Copa Airlines deal was found by Cheapflights users on 9/5. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:08 am -
1 stop18h 24m
Sat 10/244:34 pm -
1 stop16h 30m
Deal found 9/5![Copa Airlines logo]()
$363
This Copa Airlines deal was found by Cheapflights users on 9/7. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1010:03 am -
1 stop12h 29m
Sat 10/174:34 pm -
1 stop17h 45m
Deal found 9/7![Copa Airlines logo]()
$384
Last-minute flights from San José to Dulles IntlDiscover last-minute flight deals from San José to Dulles Intl. Data last updated September 8, 2026 and is based on user searches.
Discover last-minute flight deals from San José to Dulles Intl. Data last updated September 8, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/7. 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 9/178:45 am -
1 stop14h 12m
Mon 9/2110:29 pm -
1 stop15h 52m
Deal found 9/7![United Airlines logo]()
$366
This United Airlines deal was found by Cheapflights users on 9/7. 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 9/178:45 am -
1 stop14h 12m
Sun 9/276:15 am -
1 stop15h 22m
Deal found 9/7![United Airlines logo]()
$375
This Kiwi.com deal was found by Cheapflights users on 9/3. 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.
Thu 10/225:55 pm -
1 stop8h 25m
Thu 10/292:25 am -
1 stop6h 59m
Deal found 9/3![Copa Airlines logo]()
$346
This Copa Airlines deal was found by Cheapflights users on 9/6. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:03 am -
1 stop12h 29m
Sat 10/311:36 am -
1 stop9h 31m
Deal found 9/6![Copa Airlines logo]()
$363
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/223:01 pm -
2 stops25h 44m
Tue 10/276:42 am -
1 stop9h 18m
Deal found 9/4![American Airlines logo]()
$380
This Avianca deal was found by Cheapflights users on 9/6. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/233:10 pm -
1 stop9h 35m
Thu 10/295:25 pm -
1 stop8h 15m
Deal found 9/6![Avianca logo]()
$365
This United Airlines deal was found by Cheapflights users on 9/7. 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 10/267:45 am -
1 stop12h 59m
Sat 10/318:59 am -
Nonstop5h 01m
Deal found 9/7![United Airlines logo]()
$371
This Avianca deal was found by Cheapflights users on 9/5. 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 Avianca is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/274:15 pm -
1 stop7h 50m
Tue 11/174:25 pm -
1 stop8h 15m
Deal found 9/5![Avianca logo]()
$364
This Kissandfly.com deal was found by Cheapflights users on 9/7. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/311:15 pm -
Nonstop4h 44m
Sat 11/75:56 pm -
1 stop13h 29m
Deal found 9/7![Lufthansa logo]()
$372
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/315:55 pm -
1 stop8h 20m
Fri 11/61:16 am -
1 stop8h 03m
Deal found 9/3![Copa Airlines logo]()
$377
This United Airlines deal was found by Cheapflights users on 9/3. 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 10/311:15 pm -
Nonstop4h 44m
Sat 11/78:25 am -
1 stop23h 00m
Deal found 9/3![United Airlines logo]()
$382
One-way flights from San José to Dulles IntlSearch for one-way flight options from San José to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.
Search for one-way flight options from San José to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated September 8, 2026.
This American Airlines deal was found by Cheapflights users on 9/6. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/33:54 pm -
2 stops22h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![American Airlines logo]()
$222
This United Airlines deal was found by Cheapflights users on 9/3. 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 10/18:45 am -
1 stop35h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![United Airlines logo]()
$223
This United Airlines deal was found by Cheapflights users on 9/6. 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 9/188:45 am -
1 stop32h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![United Airlines logo]()
$226
This United Airlines deal was found by Cheapflights users on 9/7. 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 12/182:15 pm -
Nonstop4h 44m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![United Airlines logo]()
$228
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/171:00 pm -
2 stops18h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![American Airlines logo]()
$232
This American Airlines deal was found by Cheapflights users on 9/4. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/133:54 pm -
2 stops25h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![American Airlines logo]()
$233
This United Airlines deal was found by Cheapflights users on 9/6. 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 10/71:25 pm -
1 stop9h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![United Airlines logo]()
$234
This Kiwi.com deal was found by Cheapflights users on 9/3. 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 10/248:55 am -
2 stops13h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![Multiple Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 9/3. 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.
Sun 1/171:15 am -
1 stop20h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/3![United Airlines logo]()
$248
This BusinessClass deal was found by Cheapflights users on 9/4. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/42:57 pm -
2 stops28h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![GOL logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 9/6. 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.
Wed 10/78:55 am -
2 stops30h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/6![Multiple Airlines logo]()
$258
Find flight deals from San José to Dulles Intl
Discover tips and strategies to find the most affordable flight options for your journey from San José (SJO) 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 8, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $346 (Kiwi.com) |
One-way from | $222 (American Airlines) |
Popular in | July |
Cheapest in | October |
Average price | $351 |
Good round-trip deal | $387 or less |
Good one-way deal | $420 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from San José 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 8, 2026.
Use the filters below to find and compare flights from San José to Washington, D.C. Dulles Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Thu 10/1
8:45 am-10:07 pm
1 stop35h 22m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$223
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Fri 9/18
8:45 am-7:05 pm
1 stop32h 20m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$226
Quickest round-trip
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Fri 12/18
2:15 pm-7:59 pm
Nonstop4h 44m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$228
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Thu 9/17
1:25 pm-12:30 am
1 stop9h 05m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$228
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Tue 1/12
1:15 am-10:36 pm
1 stop20h 21m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$234
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Wed 10/7
1:25 pm-12:30 am
1 stop9h 05m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$234
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Fri 12/4
8:45 am-11:13 pm
2 stops13h 28m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$234
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Mon 10/19
8:45 am-5:46 am
1 stop19h 01m
Washington, D.C. Dulles Intl
Wed 12/31
12:00 am-11:00 pm
Nonstop0h 00m
$234
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Thu 2/25
3:59 am-3:16 am
1 stop22h 17m
Washington, D.C. Dulles Intl
Mon 3/1
1:24 am-11:00 am
1 stop10h 36m
$363
San JoséWashington, D.C.
SJO San José Juan Santamaria Intl - IAD Washington, D.C. Dulles Intl
SJOIAD
San José Juan Santamaria Intl
Tue 10/20
5:55 pm-4:20 am
1 stop8h 25m
Washington, D.C. Dulles Intl
Mon 10/26
2:25 am-10:58 am
1 stop10h 33m
$363
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from San José 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 José to Dulles Intl in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San José-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 José-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 José-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 José-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 José-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 José to Dulles Intl
Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from San José with our price prediction graph.
SJO-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.
Cheapflights Insights
Everything you need to know about your flight from San José to Washington, D.C. Dulles Intl Airport
Prices
Delays
How far ahead should I book a flight from San José to Washington, D.C. Dulles Intl Airport?
Booking 70 days in advance of your planned departure date is, on average, the best time to get cheap flights from San José to Washington, D.C. Dulles Intl Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from San José to Washington, D.C. Dulles Intl Airport?
Currently, October is the cheapest month in which you can book a flight from San José to Washington, D.C. Dulles Intl Airport (average of $256). Flying from San José to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $415). 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 SJO to IAD?
Find hourly flight availability from San José 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 8, 2026.
When flying from San José 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.
How often are flights from San José to Washington, D.C. delayed?
About 15% of weekly flights between San José and Washington, D.C. have experienced delays in the past year, with the average delay time being 122 minutes.
What is the most punctual flight time for San José to Washington, D.C. flights?
Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Thursday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San José to Washington, D.C. flights?
Over the last year, Avianca have had the lowest number of delays on this route, with just 13% of flights being delayed.
The best insider tips for San José 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 José 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 8, 2026.
Peruse reviews from past customers who have flown with Copa Airlines,United Airlines, andAvianca from San José to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.8
Overall
7.6
Food
6.9
Comfort
7.4
Entertainment
6.9
Crew
8.1
Reviews
1 / 20
4.0
OkayPaul,Jun 2025
PTY - MIA
Boarding
7.8
Overall
7.6
Food
6.9
Comfort
7.4
Entertainment
6.9
Crew
8.1
Reviews
1 / 20
4.0
OkayPaul,Jun 2025
PTY - MIA
Boarding
7.8
Overall
7.6
Food
6.9
Comfort
7.4
Entertainment
6.9
Crew
8.1
Reviews
1 / 20
4.0
OkayPaul,Jun 2025
PTY - MIA
Boarding
7.8
Overall
7.6
Food
6.9
Comfort
7.4
Entertainment
6.9
Crew
8.1
Reviews
1 / 20
4.0
OkayPaul,Jun 2025
PTY - MIA
Related info for your journey
Find useful and relevant information for your journey from San José 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
Tysons
Lanham
Reston
Chantilly
Herndon
Rockville
Hyattsville
Fredericksburg
Woodbridge
Falls Church
Sterling
Hanover
Laurel
Oxon Hill
Clinton
Hunt Valley
Silver Spring
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Dulles Intl flight routes
Flights by cabin class
Other flight options
Other flights from San José
Popular flights
Alternative routes for San José to Dulles Intl
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Dulles Intl by adding a car rental and/or hotel reservation to your travel itinerary.
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 8, 2026.
Search flights from San José to Dulles Intl by cabin class
Find flights from San José to Dulles Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
San José and Dulles Intl flights
Browse other San José and Dulles Intl flight options. Last updated on September 8, 2026.
Other flights from San José
Browse through other flights departing from San José. Flights are based on user searches made on Cheapflights and were last updated on September 8, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 3 airlines flying from San José to Dulles Intl
Discover the top 3 airlines that operate flights from San José 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 8, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$201 | Average$354 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$216 | Average$332 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$294 | Average$395 | FlexibilityNo cancel fee | On-time70% |