In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport as you normally would.

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

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

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

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

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

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

$342+ Flights from Rio de Janeiro Santos Dumont Airport, Brazil to Washington, D.C. Dulles Intl Airport

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Cheap flight deals from Santos Dumont to Dulles Intl

Cheapest flights from Santos Dumont to Dulles Intl
Explore the most affordable flight options available from Santos Dumont to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

Wed 12/245:40 pmSDU - IAD

2 stops24h 43mLATAM Airlines

Thu 1/15:06 pmIAD - SDU

2 stops21h 54mLATAM Airlines

Deal found 12/11

$1,200

Fri 12/198:05 pmSDU - IAD

2 stops22h 43mLATAM Airlines

Mon 1/126:15 pmIAD - SDU

2 stops17h 00mLATAM Airlines

Deal found 12/10

$1,586

Sat 12/208:05 pmSDU - IAD

2 stops22h 43mLATAM Airlines

Sun 1/1112:23 pmIAD - SDU

2 stops22h 52mLATAM Airlines

Deal found 12/10

$1,611

Wed 12/248:05 pmSDU - IAD

2 stops22h 18mLATAM Airlines

Fri 1/26:59 pmIAD - SDU

2 stops17h 51mLATAM Airlines

Deal found 12/11

$1,656

Wed 12/248:05 pmSDU - IAD

2 stops22h 18mLATAM Airlines

Sat 1/34:55 pmIAD - SDU

2 stops18h 20mLATAM Airlines

Deal found 12/11

$1,757

Wed 12/2411:20 amSDU - IAD

2 stops26h 15mAir Canada

Thu 1/19:00 amIAD - SDU

2 stops27h 30mAir Canada

Deal found 12/11

$1,804

Wed 12/2411:20 amSDU - IAD

2 stops26h 15mAir Canada

Fri 1/29:00 amIAD - SDU

2 stops27h 35mAir Canada

Deal found 12/11

$1,961

Thu 12/188:05 pmSDU - IAD

2 stops17h 34mLATAM Airlines

Sat 1/36:59 pmIAD - SDU

2 stops16h 16mLATAM Airlines

Deal found 12/10

$2,136

Sat 12/2011:20 amSDU - IAD

2 stops26h 15mAir Canada

Sun 1/119:45 amIAD - SDU

2 stops26h 20mAir Canada

Deal found 12/11

$2,225

Wed 12/246:55 pmSDU - IAD

2 stops21h 57mAzul

Sat 1/310:00 amIAD - SDU

2 stops21h 10mAzul

Deal found 12/10

$2,231

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

Thu 5/71:45 pmSDU - IAD

2 stops27h 35mAir Canada

Sun 5/109:45 amIAD - SDU

2 stops30h 00mAir Canada

Deal found 12/9

$611

Thu 5/71:45 pmSDU - IAD

1 stop17h 40mUnited Airlines

Sun 5/1010:30 pmIAD - SDU

1 stop17h 15mUnited Airlines

Deal found 12/10

$744

Sun 3/158:05 pmSDU - IAD

2 stops17h 34mLATAM Airlines

Fri 3/2012:52 pmIAD - SDU

2 stops23h 23mLATAM Airlines

Deal found 12/10

$918

Wed 3/111:45 pmSDU - IAD

2 stops32h 09mAir Canada

Wed 3/184:30 pmIAD - SDU

2 stops23h 10mAir Canada

Deal found 12/11

$617

Fri 4/241:45 pmSDU - IAD

2 stops26h 54mAir Canada

Thu 5/219:55 amIAD - SDU

2 stops29h 50mAir Canada

Deal found 12/11

$888

Wed 3/111:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Wed 3/1811:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Deal found 12/11

$1,026

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

Thu 12/188:05 pmSDU - IAD

2 stops17h 34mLATAM Airlines

Sat 1/36:59 pmIAD - SDU

2 stops16h 16mLATAM Airlines

Deal found 12/10

$2,136

Fri 12/198:05 pmSDU - IAD

2 stops22h 43mLATAM Airlines

Mon 1/126:15 pmIAD - SDU

2 stops17h 00mLATAM Airlines

Deal found 12/10

$1,586

Sat 12/208:05 pmSDU - IAD

2 stops22h 43mLATAM Airlines

Sun 1/1112:23 pmIAD - SDU

2 stops22h 52mLATAM Airlines

Deal found 12/10

$1,611

Wed 12/245:40 pmSDU - IAD

2 stops24h 43mLATAM Airlines

Thu 1/15:06 pmIAD - SDU

2 stops21h 54mLATAM Airlines

Deal found 12/11

$1,200

Wed 12/248:05 pmSDU - IAD

2 stops22h 18mLATAM Airlines

Fri 1/26:59 pmIAD - SDU

2 stops17h 51mLATAM Airlines

Deal found 12/11

$1,656

Wed 12/248:05 pmSDU - IAD

2 stops22h 18mLATAM Airlines

Sat 1/34:55 pmIAD - SDU

2 stops18h 20mLATAM Airlines

Deal found 12/11

$1,757

Wed 12/2411:20 amSDU - IAD

2 stops26h 15mAir Canada

Thu 1/19:00 amIAD - SDU

2 stops27h 30mAir Canada

Deal found 12/11

$1,804

Wed 12/2411:20 amSDU - IAD

2 stops26h 15mAir Canada

Fri 1/29:00 amIAD - SDU

2 stops27h 35mAir Canada

Deal found 12/11

$1,961

Thu 1/86:15 amSDU - IAD

2 stops17h 10mMultiple Airlines

Thu 1/152:35 pmIAD - SDU

2 stops46h 00mMultiple Airlines

Deal found 12/12

$1,526

Mon 1/1211:20 amSDU - IAD

2 stops26h 15mAir Canada

Thu 1/221:15 pmIAD - SDU

2 stops23h 15mAir Canada

Deal found 12/11

$2,159

Sat 1/3111:20 amSDU - IAD

2 stops35h 34mAir Canada

Wed 2/49:00 amIAD - SDU

2 stops27h 30mAir Canada

Deal found 12/11

$1,180

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

Thu 3/261:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Deal found 12/11

$342

Tue 2/241:45 pmSDU - IAD

3 stops43h 35mMultiple Airlines

Deal found 12/10

$353

Sat 4/116:50 pmSDU - IAD

2 stops35h 45mMultiple Airlines

Deal found 12/11

$398

Sun 3/158:30 amSDU - IAD

2 stops21h 55mMultiple Airlines

Deal found 12/11

$401

Tue 3/241:45 pmSDU - IAD

2 stops28h 45mUnited Airlines

Deal found 12/10

$429

Sat 3/286:50 pmSDU - IAD

2 stops37h 34mMultiple Airlines

Deal found 12/11

$432

Mon 2/235:10 pmSDU - IAD

2 stops46h 05mGOL

Deal found 12/10

$442

Tue 3/247:15 pmSDU - IAD

2 stops20h 00mMultiple Airlines

Deal found 12/10

$465

Fri 3/271:45 pmSDU - IAD

2 stops25h 30mMultiple Airlines

Deal found 12/11

$469

Find flight deals from Santos Dumont to Dulles Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$607 (Air Canada)
One-way from	$342 (United Airlines)
Popular in	June
Cheapest in	March
Average price	$569

Provider with most accurate pricing for Rio de Janeiro (RIO)-Washington, D.C. (WAS) flight deals.

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Provider most trusted by Cheapflights users for Rio de Janeiro (RIO)-Washington, D.C. (WAS) flights.

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From Rio de Janeiro Santos Dumont to Washington, D.C. Dulles Intl

Search Deals

One-way flight from Rio de Janeiro Santos Dumont to Washington, D.C. Dulles Intl

Search Deals

Highest demand for flights based on searches. 11% potential increase in price ($75 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($17 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 Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Thu 5/7

1:45 pm-4:20 pm

2 stops27h 35m

Washington, D.C. Dulles Intl

Sun 5/10

9:45 am-4:45 pm

2 stops30h 00m

$611

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Wed 3/11

1:45 pm-8:54 pm

2 stops32h 09m

Washington, D.C. Dulles Intl

Wed 3/18

4:30 pm-4:40 pm

2 stops23h 10m

$617

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Thu 5/7

1:45 pm-6:25 am

1 stop17h 40m

Washington, D.C. Dulles Intl

Sun 5/10

10:30 pm-4:45 pm

1 stop17h 15m

$744

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Fri 4/24

1:45 pm-3:39 pm

2 stops26h 54m

Washington, D.C. Dulles Intl

Thu 5/21

9:55 am-4:45 pm

2 stops29h 50m

$888

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sun 3/15

8:05 pm-12:39 pm

2 stops17h 34m

Washington, D.C. Dulles Intl

Fri 3/20

12:52 pm-1:15 pm

2 stops23h 23m

$918

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Wed 3/11

1:45 pm-6:40 am

1 stop17h 55m

Washington, D.C. Dulles Intl

Wed 3/18

11:30 pm-4:40 pm

1 stop16h 10m

$1,026

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Thu 3/26

1:45 pm-11:49 am

2 stops23h 04m

$348

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Tue 2/24

1:45 pm-7:20 am

3 stops43h 35m

$353

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sat 4/11

6:50 pm-5:35 am

2 stops35h 45m

$398

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sun 3/22

8:30 am-5:25 am

2 stops21h 55m

$401

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 16 results

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

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Santos Dumont 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 Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport?
Departing from Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport will take you 17h 40m. There are 4811 mi between Rio de Janeiro Santos Dumont Airport and Washington, D.C. Dulles Intl Airport. 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 Santos Dumont to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Santos Dumont to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Santos Dumont to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Santos Dumont to Dulles Intl.
Can I find deals for business class flights from Santos Dumont to Dulles Intl?
Yes. Cheapflights offers flight deals from Santos Dumont to Dulles Intl 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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$342+ Cheap flights from Santos Dumont, Brazil (SDU) to Dulles Intl (IAD)

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 3/26. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Santos Dumont to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Santos Dumont to Dulles Intl

Cheapest flights from Santos Dumont to Dulles IntlExplore the most affordable flight options available from Santos Dumont to Dulles Intl. 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 Santos Dumont to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

Find flight deals from Santos Dumont to Dulles Intl

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 Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport that are best for you.

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

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

Related info for your journey

Find useful and relevant information for your journey from Santos Dumont to Dulles Intl. 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 Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport?

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

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

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

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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Cheapest flights from Santos Dumont to Dulles Intl
Explore the most affordable flight options available from Santos Dumont to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.