In terms of precipitation, rainfall in Rio de Janeiro Santos Dumont Airport ranges from 1.6 - 5.1 inches per month. January is typically the wettest month, when rainfall can reach 5.1 in. July is typically the driest time to visit Rio de Janeiro Santos Dumont Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to Rio de Janeiro Santos Dumont Airport, use this chart to help with planning. For those seeking warmer temperatures, February is the ideal time of year to visit, when temperatures reach an average of 82.4 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 69.8 F).

What is the cheapest time of day to fly from IAD to SDU?

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 Rio de Janeiro Santos Dumont Airport as you normally would.

Most accurate provider : When it comes to deals on Washington, D.C. Dulles Intl Airport-Rio de Janeiro Santos Dumont Airport 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-Rio de Janeiro Santos Dumont Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Rio de Janeiro Santos Dumont Airport 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-Rio de Janeiro Santos Dumont 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 Washington, D.C. Dulles Intl Airport-Rio de Janeiro Santos Dumont Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

$341+ Flights from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport, Brazil

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Cheap 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 December 12, 2025.

Fri 12/2610:33 pmIAD - SDU

2 stops41h 12mUnited Airlines

Sun 1/112:50 pmSDU - IAD

2 stops27h 10mUnited Airlines

Deal found 12/11

$1,626

Thu 12/1810:30 pmIAD - SDU

1 stop14h 00mUnited Airlines

Sun 12/212:50 pmSDU - IAD

1 stop17h 45mUnited Airlines

Deal found 12/10

$1,649

Mon 12/1512:42 pmIAD - SDU

2 stops22h 03mAzul

Wed 12/176:15 amSDU - IAD

2 stops17h 10mAzul

Deal found 12/10

$1,681

Sat 12/2710:30 pmIAD - SDU

1 stop17h 15mUnited Airlines

Sun 1/112:50 pmSDU - IAD

2 stops22h 56mUnited Airlines

Deal found 12/11

$1,684

Sun 12/284:55 pmIAD - SDU

2 stops26h 10mMultiple Airlines

Thu 1/86:15 amSDU - IAD

2 stops17h 10mMultiple Airlines

Deal found 12/9

$1,838

Tue 12/308:25 amIAD - SDU

2 stops35h 45mAzul

Mon 1/59:05 pmSDU - IAD

2 stops50h 20mAzul

Deal found 12/11

$1,867

Fri 12/264:55 pmIAD - SDU

2 stops18h 20mMultiple Airlines

Sat 1/1011:20 amSDU - IAD

2 stops19h 05mMultiple Airlines

Deal found 12/11

$1,962

Wed 12/1712:42 pmIAD - SDU

2 stops19h 58mAzul

Thu 1/86:15 amSDU - IAD

2 stops17h 10mAzul

Deal found 12/11

$1,991

Best flights from Dulles Intl to Santos Dumont
Discover carefully curated flight deals from Dulles Intl to Santos Dumont that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

Tue 3/109:55 amIAD - SDU

2 stops29h 45mAir Canada

Mon 3/161:45 pmSDU - IAD

2 stops22h 44mAir Canada

Deal found 12/10

$630

Fri 5/19:45 amIAD - SDU

2 stops33h 30mMultiple Airlines

Mon 5/41:45 pmSDU - IAD

2 stops26h 49mMultiple Airlines

Deal found 12/11

$638

Thu 3/510:50 pmIAD - SDU

1 stop15h 50mUnited Airlines

Wed 3/111:45 pmSDU - IAD

2 stops23h 04mUnited Airlines

Deal found 12/10

$765

Mon 1/264:30 pmIAD - SDU

2 stops19h 40mAir Canada

Wed 1/2811:20 amSDU - IAD

2 stops26h 15mAir Canada

Deal found 12/11

$803

Thu 3/510:50 pmIAD - SDU

1 stop15h 50mUnited Airlines

Mon 3/91:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Deal found 12/10

$805

Sat 1/249:45 amIAD - SDU

2 stops30h 00mAir Canada

Sat 1/3111:20 amSDU - IAD

2 stops35h 34mAir Canada

Deal found 12/10

$805

Tue 3/1011:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Thu 3/191:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Deal found 12/11

$890

Thu 3/510:50 pmIAD - SDU

1 stop15h 50mAir Canada

Mon 3/91:45 pmSDU - IAD

1 stop17h 55mAir Canada

Deal found 12/10

$830

Sun 3/110:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Sat 3/75:30 pmSDU - IAD

1 stop14h 10mUnited Airlines

Deal found 12/10

$890

Wed 3/259:00 amIAD - SDU

2 stops30h 40mAir Canada

Tue 4/71:45 pmSDU - IAD

2 stops22h 38mAir Canada

Deal found 12/9

$866

Last-minute flights from Dulles Intl to Santos Dumont
Discover last-minute flight deals from Dulles Intl to Santos Dumont. Data last updated December 12, 2025 and is based on user searches.

Wed 1/215:16 pmIAD - SDU

2 stops19h 14mMultiple Airlines

Wed 2/411:20 amSDU - IAD

2 stops26h 15mMultiple Airlines

Deal found 12/11

$634

Fri 1/239:45 amIAD - SDU

2 stops26h 50mAir Canada

Thu 1/2911:20 amSDU - IAD

2 stops36h 05mAir Canada

Deal found 12/10

$848

Sat 1/249:45 amIAD - SDU

2 stops30h 00mMultiple Airlines

Sat 1/3111:20 amSDU - IAD

3 stops30h 29mMultiple Airlines

Deal found 12/10

$728

Sat 1/249:45 amIAD - SDU

2 stops30h 00mAir Canada

Sat 1/3111:20 amSDU - IAD

2 stops35h 34mAir Canada

Deal found 12/10

$805

Sun 1/251:15 pmIAD - SDU

2 stops22h 50mAir Canada

Tue 2/311:20 amSDU - IAD

2 stops31h 10mAir Canada

Deal found 12/11

$633

Sun 1/2510:30 pmIAD - SDU

1 stop13h 35mUnited Airlines

Sun 2/12:50 pmSDU - IAD

1 stop17h 45mUnited Airlines

Deal found 12/11

$890

Sun 1/251:15 pmIAD - SDU

2 stops22h 50mAir Canada

Thu 1/2911:20 amSDU - IAD

2 stops26h 28mAir Canada

Deal found 12/11

$978

Mon 1/264:30 pmIAD - SDU

2 stops19h 40mAir Canada

Wed 1/2811:20 amSDU - IAD

2 stops26h 15mAir Canada

Deal found 12/11

$803

Mon 1/265:16 pmIAD - SDU

2 stops18h 54mMultiple Airlines

Wed 1/288:10 amSDU - IAD

2 stops29h 25mMultiple Airlines

Deal found 12/11

$804

Thu 1/299:45 amIAD - SDU

2 stops26h 45mAir Canada

Mon 2/211:20 amSDU - IAD

2 stops31h 04mAir Canada

Deal found 12/10

$629

One-way flights from Dulles Intl to Santos Dumont
Search for one-way flight options from Dulles Intl to Santos Dumont. Find affordable one-way fares based on user searches. Data last updated December 12, 2025.

Sat 4/119:19 amIAD - SDU

2 stops26h 16mMultiple Airlines

Deal found 12/10

$341

Wed 12/318:15 amIAD - SDU

2 stops28h 15mUnited Airlines

Deal found 12/11

$345

Tue 2/35:17 pmIAD - SDU

2 stops43h 13mUnited Airlines

Deal found 12/11

$358

Sat 4/1110:05 pmIAD - SDU

2 stops41h 40mUnited Airlines

Deal found 12/10

$360

Mon 2/23:58 pmIAD - SDU

3 stops37h 37mMultiple Airlines

Deal found 12/11

$374

Fri 1/210:30 pmIAD - SDU

1 stop14h 05mUnited Airlines

Deal found 12/11

$391

Mon 6/12:52 pmIAD - SDU

3 stops16h 58mMultiple Airlines

Deal found 12/11

$396

Wed 5/209:45 amIAD - SDU

2 stops30h 00mAir Canada

Deal found 12/9

$398

Mon 5/189:55 amIAD - SDU

2 stops29h 50mAir Canada

Deal found 12/10

$401

Sun 5/314:10 pmIAD - SDU

2 stops23h 35mAir Canada

Deal found 12/11

$403

Find flight deals from Dulles Intl to Santos Dumont

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 1 star
Round-trip from	$604 (Gotogate)
One-way from	$341 (Kiwi.com)
Popular in	December
Cheapest in	May
Average price	$898

Provider with most accurate pricing for Washington, D.C. Dulles Intl-Rio de Janeiro Santos Dumont flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Rio de Janeiro Santos Dumont flights.

Search Deals

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. 12% potential increase in price ($95 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($19 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Fly to

Route

Depart

Return

Price

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Tue 3/10

9:55 am-4:40 pm

2 stops29h 45m

Rio de Janeiro Santos Dumont

Mon 3/16

1:45 pm-11:29 am

2 stops22h 44m

$630

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Fri 5/1

9:45 am-8:15 pm

2 stops33h 30m

Rio de Janeiro Santos Dumont

Mon 5/4

1:45 pm-3:34 pm

2 stops26h 49m

$638

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Thu 3/5

10:50 pm-4:40 pm

1 stop15h 50m

Rio de Janeiro Santos Dumont

Wed 3/11

1:45 pm-11:49 am

2 stops23h 04m

$765

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Mon 1/26

4:30 pm-2:10 pm

2 stops19h 40m

Rio de Janeiro Santos Dumont

Wed 1/28

11:20 am-11:35 am

2 stops26h 15m

$803

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Thu 3/5

10:50 pm-4:40 pm

1 stop15h 50m

Rio de Janeiro Santos Dumont

Mon 3/9

1:45 pm-6:40 am

1 stop17h 55m

$805

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Sat 1/24

9:45 am-5:45 pm

2 stops30h 00m

Rio de Janeiro Santos Dumont

Sat 1/31

11:20 am-8:54 pm

2 stops35h 34m

$805

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Thu 3/5

10:50 pm-4:40 pm

1 stop15h 50m

Rio de Janeiro Santos Dumont

Mon 3/9

1:45 pm-6:40 am

1 stop17h 55m

$830

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 3/25

9:00 am-4:40 pm

2 stops30h 40m

Rio de Janeiro Santos Dumont

Tue 4/7

1:45 pm-11:23 am

2 stops22h 38m

$866

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Tue 3/10

11:30 pm-4:40 pm

1 stop16h 10m

Rio de Janeiro Santos Dumont

Thu 3/19

1:45 pm-6:40 am

1 stop17h 55m

$890

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Sun 3/1

10:30 pm-4:40 pm

1 stop16h 10m

Rio de Janeiro Santos Dumont

Sat 3/7

5:30 pm-5:40 am

1 stop14h 10m

$890

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 21 results

Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Rio de Janeiro Santos Dumont Airport 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-Rio de Janeiro Santos Dumont Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Rio de Janeiro Santos Dumont Airport 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-Rio de Janeiro Santos Dumont 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 Washington, D.C. Dulles Intl Airport-Rio de Janeiro Santos Dumont 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 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

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 15h 50m. Air Canada provides one of the quickest options available for as low as $765. 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.

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$341+ 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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Santos Dumont with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Dulles Intl to Santos Dumont

Cheapest flights from Dulles Intl to Santos DumontExplore 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 December 12, 2025.

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 December 12, 2025.

Find flight deals from Dulles Intl to Santos Dumont

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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.

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.

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?

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

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

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

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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 December 12, 2025.