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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Rio de Janeiro Santos Dumont Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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.

$303+ Cheap Flights from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport, Brazil

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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 October 27, 2025.

Fri 12/1912:30 pmIAD - SDU

2 stops22h 45mLATAM Airlines

Thu 1/82:00 pmSDU - IAD

2 stops25h 53mLATAM Airlines

Deal found 10/24

$610

Fri 12/54:00 pmIAD - SDU

2 stops22h 00mMultiple Airlines

Sat 12/135:40 pmSDU - IAD

2 stops19h 29mMultiple Airlines

Deal found 10/25

$689

Tue 10/2811:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Sun 11/22:50 pmSDU - IAD

1 stop17h 45mUnited Airlines

Deal found 10/27

$705

Tue 10/285:38 pmIAD - SDU

2 stops22h 02mUnited Airlines

Mon 11/31:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Deal found 10/25

$710

Tue 11/410:30 pmIAD - SDU

1 stop16h 15mUnited Airlines

Wed 11/121:45 pmSDU - IAD

2 stops24h 04mUnited Airlines

Deal found 10/27

$715

Sun 10/2610:35 pmIAD - SDU

2 stops41h 10mUnited Airlines

Sun 11/22:50 pmSDU - IAD

1 stop17h 45mUnited Airlines

Deal found 10/25

$773

Wed 11/265:45 amIAD - SDU

2 stops23h 50mMultiple Airlines

Mon 12/11:45 pmSDU - IAD

2 stops25h 30mMultiple Airlines

Deal found 10/26

$872

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 October 27, 2025.

Thu 3/269:55 amIAD - SDU

2 stops27h 25mAir Canada

Wed 4/111:25 amSDU - IAD

2 stops34h 25mAir Canada

Deal found 10/25

$698

Thu 12/256:00 amIAD - SDU

2 stops25h 25mLATAM Airlines

Sat 1/38:05 pmSDU - IAD

2 stops18h 08mLATAM Airlines

Deal found 10/25

$705

Sat 4/1110:30 pmIAD - SDU

1 stop18h 15mUnited Airlines

Sun 4/192:55 pmSDU - IAD

2 stops23h 47mUnited Airlines

Deal found 10/26

$765

Wed 11/265:45 amIAD - SDU

2 stops23h 50mMultiple Airlines

Mon 12/11:45 pmSDU - IAD

2 stops25h 30mMultiple Airlines

Deal found 10/26

$872

Mon 2/92:35 pmIAD - SDU

2 stops29h 50mGOL

Thu 2/1211:35 amSDU - IAD

2 stops51h 40mGOL

Deal found 10/24

$1,047

Fri 3/279:55 amIAD - SDU

2 stops27h 25mAir Canada

Thu 4/211:25 amSDU - IAD

2 stops34h 25mAir Canada

Deal found 10/25

$928

Wed 3/1111:30 pmIAD - SDU

1 stop13h 50mUnited Airlines

Sun 3/152:55 pmSDU - IAD

1 stop16h 45mUnited Airlines

Deal found 10/25

$932

Wed 3/184:00 pmIAD - SDU

2 stops20h 15mLATAM Airlines

Sun 3/228:05 pmSDU - IAD

2 stops16h 48mLATAM Airlines

Deal found 10/25

$986

Wed 11/269:00 amIAD - SDU

2 stops29h 45mAir Canada

Mon 12/11:45 pmSDU - IAD

2 stops28h 36mAir Canada

Deal found 10/27

$950

Fri 12/510:30 pmIAD - SDU

1 stop34h 40mUnited Airlines

Mon 12/81:45 pmSDU - IAD

2 stops23h 59mUnited Airlines

Deal found 10/25

$971

Sat 2/211:13 pmIAD - SDU

2 stops26h 32mAir Canada

Wed 2/2511:25 amSDU - IAD

2 stops35h 34mAir Canada

Deal found 10/26

$968

Wed 11/2610:30 pmIAD - SDU

1 stop16h 15mUnited Airlines

Mon 12/11:45 pmSDU - IAD

2 stops23h 59mUnited Airlines

Deal found 10/26

$1,021

Last-minute flights from Dulles Intl to Santos Dumont
Discover last-minute flight deals from Dulles Intl to Santos Dumont. Data last updated October 27, 2025 and is based on user searches.

Sun 10/2610:35 pmIAD - SDU

2 stops41h 10mUnited Airlines

Sun 11/22:50 pmSDU - IAD

1 stop17h 45mUnited Airlines

Deal found 10/25

$773

Tue 10/2811:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Sun 11/22:50 pmSDU - IAD

1 stop17h 45mUnited Airlines

Deal found 10/27

$705

Tue 10/285:38 pmIAD - SDU

2 stops22h 02mUnited Airlines

Mon 11/31:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Deal found 10/25

$710

Tue 11/410:30 pmIAD - SDU

1 stop16h 15mUnited Airlines

Wed 11/121:45 pmSDU - IAD

2 stops24h 04mUnited Airlines

Deal found 10/27

$715

Mon 11/2412:40 pmIAD - SDU

2 stops26h 05mUnited Airlines

Mon 12/11:45 pmSDU - IAD

2 stops28h 15mUnited Airlines

Deal found 10/26

$897

Tue 11/2510:30 pmIAD - SDU

1 stop16h 15mUnited Airlines

Mon 12/11:45 pmSDU - IAD

2 stops28h 15mUnited Airlines

Deal found 10/26

$892

Wed 11/265:45 amIAD - SDU

2 stops23h 50mMultiple Airlines

Mon 12/11:45 pmSDU - IAD

2 stops25h 30mMultiple Airlines

Deal found 10/26

$872

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 October 27, 2025.

Mon 11/2412:47 pmIAD - SDU

3 stops49h 58mMultiple Airlines

Deal found 10/26

$303

Tue 12/239:58 pmIAD - SDU

2 stops32h 57mMultiple Airlines

Deal found 10/26

$314

Sun 11/910:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Deal found 10/26

$341

Mon 11/2412:40 pmIAD - SDU

2 stops26h 05mUnited Airlines

Deal found 10/26

$345

Fri 3/279:15 amIAD - SDU

3 stops49h 05mMultiple Airlines

Deal found 10/25

$354

Fri 3/274:00 pmIAD - SDU

2 stops16h 35mLATAM Airlines

Deal found 10/26

$355

Sun 11/2310:35 pmIAD - SDU

2 stops40h 10mUnited Airlines

Deal found 10/26

$358

Wed 11/263:24 pmIAD - SDU

3 stops39h 56mMultiple Airlines

Deal found 10/25

$359

Mon 12/227:06 pmIAD - SDU

3 stops59h 49mMultiple Airlines

Deal found 10/26

$374

Cheap flight deals from Dulles Intl to Santos Dumont

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$610 (LATAM Airlines)
One-way from	$303 (Kiwi.com)
Popular in	December
Cheapest in	October
Average price	$569

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. 10% potential increase in price ($82 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in October 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

Thu 3/26

9:55 am-2:20 pm

2 stops27h 25m

Rio de Janeiro Santos Dumont

Wed 4/1

11:25 am-8:50 pm

2 stops34h 25m

$698

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Thu 12/25

6:00 am-9:25 am

2 stops25h 25m

Rio de Janeiro Santos Dumont

Sat 1/3

8:05 pm-12:13 pm

2 stops18h 08m

$705

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Sat 4/11

10:30 pm-5:45 pm

1 stop18h 15m

Rio de Janeiro Santos Dumont

Sun 4/19

2:55 pm-1:42 pm

2 stops23h 47m

$765

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 11/26

5:45 am-7:35 am

2 stops23h 50m

Rio de Janeiro Santos Dumont

Mon 12/1

1:45 pm-1:15 pm

2 stops25h 30m

$872

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Fri 3/27

9:55 am-2:20 pm

2 stops27h 25m

Rio de Janeiro Santos Dumont

Thu 4/2

11:25 am-8:50 pm

2 stops34h 25m

$928

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 3/11

11:30 pm-2:20 pm

1 stop13h 50m

Rio de Janeiro Santos Dumont

Sun 3/15

2:55 pm-6:40 am

1 stop16h 45m

$932

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 11/26

9:00 am-4:45 pm

2 stops29h 45m

Rio de Janeiro Santos Dumont

Mon 12/1

1:45 pm-4:21 pm

2 stops28h 36m

$950

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Sat 2/21

1:13 pm-5:45 pm

2 stops26h 32m

Rio de Janeiro Santos Dumont

Wed 2/25

11:25 am-8:59 pm

2 stops35h 34m

$968

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Fri 12/5

10:30 pm-11:10 am

1 stop34h 40m

Rio de Janeiro Santos Dumont

Mon 12/8

1:45 pm-11:44 am

2 stops23h 59m

$971

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 3/18

4:00 pm-1:15 pm

2 stops20h 15m

Rio de Janeiro Santos Dumont

Sun 3/22

8:05 pm-11:53 am

2 stops16h 48m

$986

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 19 results

Compare providers for flights from Dulles Intl to Santos Dumont

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Santos Dumont in October.

Provider	Price Accuracy	Trust Score*
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Washington, D.C. Dulles Intl Airport-Rio de Janeiro Santos Dumont Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 18h 15m. 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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$303+ 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 11/24. 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

Find 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 October 27, 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 October 27, 2025.

Cheap 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.

Compare providers for flights from Dulles Intl to Santos Dumont

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Santos Dumont in October.

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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Alternative routes for 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 October 27, 2025.