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.

$269+ 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

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 28, 2025.

Tue 5/51:45 pmSDU - IAD

2 stops22h 38mAir Canada

Wed 5/209:45 amIAD - SDU

2 stops30h 00mAir Canada

Deal found 12/26

$662

Thu 3/191:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Mon 3/2311:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Deal found 12/26

$662

Sun 3/158:05 pmSDU - IAD

2 stops17h 34mLATAM Airlines

Fri 3/203:35 pmIAD - SDU

2 stops17h 00mLATAM Airlines

Deal found 12/27

$783

Mon 5/41:45 pmSDU - IAD

2 stops30h 13mAir Canada

Tue 5/194:10 pmIAD - SDU

2 stops23h 35mAir Canada

Deal found 12/26

$662

Tue 5/51:45 pmSDU - IAD

2 stops31h 44mAir Canada

Tue 5/194:10 pmIAD - SDU

2 stops23h 35mAir Canada

Deal found 12/26

$666

Tue 5/51:45 pmSDU - IAD

2 stops22h 38mAir Canada

Mon 5/184:10 pmIAD - SDU

2 stops23h 35mAir Canada

Deal found 12/26

$666

Last-minute flights from Santos Dumont to Dulles Intl
Discover last-minute flight deals from Santos Dumont to Dulles Intl. Data last updated December 28, 2025 and is based on user searches.

Wed 1/78:05 pmSDU - IAD

2 stops17h 38mLATAM Airlines

Sat 1/175:59 pmIAD - SDU

2 stops17h 16mLATAM Airlines

Deal found 12/26

$3,074

Mon 1/126:15 amSDU - IAD

2 stops17h 10mAzul

Thu 1/229:45 amIAD - SDU

2 stops24h 55mAzul

Deal found 12/27

$2,291

Thu 1/2211:20 amSDU - IAD

2 stops30h 26mAir Canada

Sun 1/259:45 amIAD - SDU

2 stops26h 20mAir Canada

Deal found 12/27

$612

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 28, 2025.

Mon 5/258:15 pmSDU - IAD

2 stops16h 36mDelta

Deal found 12/27

$269

Sat 1/318:05 pmSDU - IAD

2 stops17h 38mLATAM Airlines

Deal found 12/27

$273

Fri 6/58:15 pmSDU - IAD

2 stops16h 36mLATAM Airlines

Deal found 12/27

$274

Thu 2/58:05 pmSDU - IAD

2 stops17h 38mLATAM Airlines

Deal found 12/27

$282

Thu 1/228:05 pmSDU - IAD

2 stops17h 38mLATAM Airlines

Deal found 12/27

$304

Thu 1/298:05 pmSDU - IAD

2 stops17h 38mLATAM Airlines

Deal found 12/26

$321

Mon 1/268:05 pmSDU - IAD

2 stops17h 38mLATAM Airlines

Deal found 12/27

$338

Tue 5/261:45 pmSDU - IAD

1 stop17h 40mUnited Airlines

Deal found 12/27

$344

Sat 5/235:30 pmSDU - IAD

1 stop13h 55mUnited Airlines

Deal found 12/27

$345

Sat 1/318:05 pmSDU - IAD

3 stops46h 23mMultiple Airlines

Deal found 12/27

$367

Find flight deals from Santos Dumont to Dulles Intl

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$612 (Air Canada)
One-way from	$269 (Delta)
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

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

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($104 potential increase over avg. RT price).

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Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).

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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

Tue 5/5

1:45 pm-11:23 am

2 stops22h 38m

Washington, D.C. Dulles Intl

Wed 5/20

9:45 am-4:45 pm

2 stops30h 00m

$662

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Thu 3/19

1:45 pm-6:40 am

1 stop17h 55m

Washington, D.C. Dulles Intl

Mon 3/23

11:30 pm-4:40 pm

1 stop16h 10m

$662

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Mon 5/4

1:45 pm-6:58 pm

2 stops30h 13m

Washington, D.C. Dulles Intl

Tue 5/19

4:10 pm-4:45 pm

2 stops23h 35m

$662

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Tue 5/5

1:45 pm-8:29 pm

2 stops31h 44m

Washington, D.C. Dulles Intl

Tue 5/19

4:10 pm-4:45 pm

2 stops23h 35m

$666

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Tue 5/5

1:45 pm-11:23 am

2 stops22h 38m

Washington, D.C. Dulles Intl

Mon 5/18

4:10 pm-4:45 pm

2 stops23h 35m

$666

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

3:35 pm-9:35 am

2 stops17h 00m

$783

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Mon 5/25

8:15 pm-11:51 am

2 stops16h 36m

$269

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Fri 5/29

8:15 pm-11:51 am

2 stops16h 36m

$269

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Thu 5/28

8:15 pm-12:01 pm

2 stops16h 46m

$269

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sat 2/7

8:05 pm-11:43 am

2 stops17h 38m

$273

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 17 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 55m. 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.

See more FAQs

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$269+ 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 5/25. 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

Best flights from Santos Dumont to Dulles IntlDiscover 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 28, 2025.

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 28, 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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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 28, 2025.