HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Santos Dumont

$285+ Cheap flights from Dulles Intl (IAD) to Santos Dumont, Brazil (SDU)

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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SDU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Dulles Intl to Santos Dumont 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.

Cheap flight deals from Dulles Intl to Santos Dumont

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Santos Dumont (SDU). 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 11, 2025.

Round-trip from

$594
(Mytrip)

One-way from

$285
(LATAM Airlines)

Popular in

December

Cheapest in

October

Average price

$590
From Washington, D.C. Dulles Intl to Rio de Janeiro Santos Dumont
Search Deals
One-way flight from Washington, D.C. Dulles Intl to Rio de Janeiro Santos Dumont
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($90 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Dulles Intl to Santos Dumont

Cheapest flights from Dulles Intl to Santos Dumont
Explore the most affordable flight options available from Dulles Intl to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Mytrip deal was found by Cheapflights users on 9/10. 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.
Tue 9/239:45 amIAD - SDU
2 stops27h 35mMultiple Airlines
Wed 10/1511:30 amSDU - IAD
2 stops34h 35mMultiple Airlines
Deal found 9/10$594
This Air Canada deal was found by Cheapflights users on 9/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/124:25 pmIAD - SDU
2 stops22h 20mAir Canada
Wed 11/191:45 pmSDU - IAD
2 stops23h 38mAir Canada
Deal found 9/11$629
This Air Canada deal was found by Cheapflights users on 9/11. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/44:25 pmIAD - SDU
2 stops22h 20mAir Canada
Tue 11/111:45 pmSDU - IAD
2 stops24h 00mAir Canada
Deal found 9/11$634
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/34:30 pmIAD - SDU
2 stops22h 15mAir Canada
Tue 12/91:45 pmSDU - IAD
2 stops24h 00mAir Canada
Deal found 9/10$637
This Trip.com deal was found by Cheapflights users on 9/11. 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.
Sun 10/2611:30 pmIAD - SDU
1 stop16h 15mUnited Airlines
Sun 11/22:50 pmSDU - IAD
1 stop17h 45mUnited Airlines
Deal found 9/11$661
This Mytrip deal was found by Cheapflights users on 9/10. 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 11/125:45 amIAD - SDU
2 stops23h 55mMultiple Airlines
Mon 11/176:50 pmSDU - IAD
3 stops32h 50mMultiple Airlines
Deal found 9/10$686
This Air Canada deal was found by Cheapflights users on 9/10. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/289:45 amIAD - SDU
2 stops30h 05mAir Canada
Mon 11/31:45 pmSDU - IAD
2 stops33h 09mAir Canada
Deal found 9/10$698
This Trip.com deal was found by Cheapflights users on 9/9. 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.
Tue 11/410:30 pmIAD - SDU
1 stop16h 15mUnited Airlines
Wed 11/121:45 pmSDU - IAD
1 stop18h 50mUnited Airlines
Deal found 9/9$705
This lol.travel deal was found by Cheapflights users on 9/9. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2310:35 pmIAD - SDU
1 stop14h 45mUnited Airlines
Thu 11/61:45 pmSDU - IAD
1 stop18h 50mUnited Airlines
Deal found 9/9$706
This Mytrip deal was found by Cheapflights users on 9/9. 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 10/296:45 amIAD - SDU
2 stops23h 50mMultiple Airlines
Tue 11/48:15 amSDU - IAD
2 stops22h 10mMultiple Airlines
Deal found 9/9$707
This Mytrip deal was found by Cheapflights users on 9/9. 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.
Sat 11/14:00 amIAD - SDU
3 stops30h 10mMultiple Airlines
Sun 11/98:30 amSDU - IAD
2 stops21h 55mMultiple Airlines
Deal found 9/9$708

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Santos Dumont 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 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport that are best for you.

Fly from

Dulles Intl

Fly to

Santos Dumont

Route

Depart

Return

Price

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Tue 11/11

9:45 am-4:45 pm

2 stops29h 00m

Rio de Janeiro Santos Dumont

Mon 11/17

1:45 pm-8:54 pm

2 stops33h 09m

$698

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Thu 10/23

10:35 pm-2:20 pm

1 stop14h 45m

Rio de Janeiro Santos Dumont

Thu 11/6

1:45 pm-6:35 am

1 stop18h 50m

$706

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Thu 10/23

5:45 am-7:40 am

3 stops24h 55m

Rio de Janeiro Santos Dumont

Thu 11/6

8:15 am-4:25 am

2 stops22h 10m

$728

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 9/24

10:35 pm-2:20 pm

1 stop14h 45m

Rio de Janeiro Santos Dumont

Tue 11/25

1:45 pm-6:35 am

1 stop18h 50m

$745

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Mon 10/13

10:35 pm-2:20 pm

1 stop14h 45m

Rio de Janeiro Santos Dumont

Sun 10/26

2:50 pm-6:40 am

1 stop16h 50m

$745

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Sun 11/9

8:30 am-4:45 pm

2 stops30h 15m

Rio de Janeiro Santos Dumont

Sun 11/16

2:50 pm-5:30 pm

2 stops28h 40m

$759

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Mon 11/10

10:30 pm-4:45 pm

1 stop16h 15m

Rio de Janeiro Santos Dumont

Mon 11/17

1:45 pm-6:35 am

1 stop18h 50m

$795

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Thu 11/13

10:30 pm-4:45 pm

1 stop16h 15m

Rio de Janeiro Santos Dumont

Sun 11/16

2:50 pm-6:35 am

1 stop17h 45m

$795

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Mon 11/24

12:31 pm-11:30 am

2 stops20h 59m

$290

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Mon 2/16

4:00 pm-4:00 pm

2 stops22h 00m

$300

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 17 results
1
2

Best time to book a flight from Dulles Intl to Santos Dumont

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from Dulles Intl with our price prediction graph.
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.

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Santos Dumont. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport?

    A quick flight from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport can take about 14h 45m. Air Canada provides one of the quickest options available for as low as $706. The distance between Washington, D.C. Dulles Intl Airport and Rio de Janeiro Santos Dumont Airport is about 4811 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Dulles Intl to Santos Dumont that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to Santos Dumont flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to Santos Dumont?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Santos Dumont.

  • Can I find deals for business class flights from Dulles Intl to Santos Dumont?

    Yes. Cheapflights offers flight deals from Dulles Intl to Santos Dumont by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

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 for Dulles Intl to Santos Dumont

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Rio de Janeiro–Galeão Intl flights
Reagan-National to Rio de Janeiro–Galeão Intl flights
Baltimore to Rio de Janeiro–Galeão Intl flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.