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.

$343+ Flights from Rio de Janeiro Santos Dumont Airport, Brazil to Washington, D.C. Dulles Intl Airport

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Find 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 October 23, 2025.

Mon 11/241:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/22

$731

Fri 11/141:45 pmSDU - IAD

2 stops33h 38mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/23

$736

Tue 11/251:45 pmSDU - IAD

2 stops33h 35mAir Canada

Wed 12/39:45 amIAD - SDU

2 stops28h 55mAir Canada

Deal found 10/22

$854

Mon 11/241:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Mon 12/88:20 amIAD - SDU

2 stops30h 15mUnited Airlines

Deal found 10/22

$858

Tue 11/251:45 pmSDU - IAD

2 stops24h 04mUnited Airlines

Mon 12/81:10 pmIAD - SDU

2 stops25h 25mUnited Airlines

Deal found 10/22

$863

Mon 11/101:45 pmSDU - IAD

2 stops33h 09mAir Canada

Sun 11/239:45 amIAD - SDU

2 stops28h 55mAir Canada

Deal found 10/21

$871

Thu 11/271:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Mon 12/88:20 amIAD - SDU

2 stops30h 15mUnited Airlines

Deal found 10/22

$928

Thu 11/271:45 pmSDU - IAD

2 stops23h 43mUnited Airlines

Wed 12/31:10 pmIAD - SDU

2 stops25h 30mUnited Airlines

Deal found 10/22

$933

Tue 11/251:45 pmSDU - IAD

2 stops32h 41mAir Canada

Thu 12/49:45 amIAD - SDU

2 stops28h 50mAir Canada

Deal found 10/22

$939

Tue 11/251:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Thu 12/410:30 pmIAD - SDU

1 stop16h 05mUnited Airlines

Deal found 10/22

$941

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 October 23, 2025.

Fri 3/1311:25 amSDU - IAD

2 stops34h 34mAir Canada

Fri 3/209:55 amIAD - SDU

2 stops27h 25mAir Canada

Deal found 10/22

$607

Wed 11/261:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/22

$731

Sun 2/12:00 pmSDU - IAD

2 stops23h 53mLATAM Airlines

Wed 2/44:00 pmIAD - SDU

2 stops19h 15mLATAM Airlines

Deal found 10/21

$787

Tue 11/251:45 pmSDU - IAD

2 stops24h 04mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/22

$736

Fri 11/141:45 pmSDU - IAD

2 stops33h 38mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/23

$736

Mon 11/241:45 pmSDU - IAD

2 stops34h 27mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/22

$806

Thu 11/271:45 pmSDU - IAD

2 stops23h 43mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/22

$806

Sun 2/12:50 pmSDU - IAD

1 stop17h 45mUnited Airlines

Wed 2/46:03 amIAD - SDU

2 stops30h 17mUnited Airlines

Deal found 10/21

$856

Tue 11/251:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Wed 12/38:20 amIAD - SDU

2 stops30h 20mUnited Airlines

Deal found 10/22

$858

Sun 3/222:55 pmSDU - IAD

2 stops34h 00mUnited Airlines

Sat 4/410:30 pmIAD - SDU

1 stop18h 15mUnited Airlines

Deal found 10/22

$863

Wed 11/261:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Sun 12/76:00 amIAD - SDU

2 stops32h 35mUnited Airlines

Deal found 10/22

$863

Last-minute flights from Santos Dumont to Dulles Intl
Discover last-minute flight deals from Santos Dumont to Dulles Intl. Data last updated October 23, 2025 and is based on user searches.

Mon 11/101:45 pmSDU - IAD

2 stops33h 09mAir Canada

Sun 11/239:45 amIAD - SDU

2 stops28h 55mAir Canada

Deal found 10/21

$871

Fri 11/141:45 pmSDU - IAD

2 stops33h 38mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/23

$736

Mon 11/241:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Tue 12/26:30 amIAD - SDU

2 stops32h 10mUnited Airlines

Deal found 10/22

$731

Mon 11/241:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Sun 12/710:30 pmIAD - SDU

1 stop16h 05mUnited Airlines

Deal found 10/22

$858

Tue 11/251:45 pmSDU - IAD

2 stops33h 35mAir Canada

Wed 12/39:45 amIAD - SDU

2 stops28h 55mAir Canada

Deal found 10/22

$854

Tue 11/251:45 pmSDU - IAD

2 stops29h 45mUnited Airlines

Sun 12/710:30 pmIAD - SDU

1 stop16h 05mUnited Airlines

Deal found 10/22

$863

Tue 11/251:45 pmSDU - IAD

2 stops32h 41mAir Canada

Thu 12/49:45 amIAD - SDU

2 stops28h 50mAir Canada

Deal found 10/22

$939

Tue 11/251:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Thu 12/410:30 pmIAD - SDU

1 stop16h 05mUnited Airlines

Deal found 10/22

$941

Thu 11/271:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Sun 12/710:30 pmIAD - SDU

1 stop16h 05mUnited Airlines

Deal found 10/22

$928

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 October 23, 2025.

Wed 11/121:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Deal found 10/23

$343

Thu 11/201:45 pmSDU - IAD

2 stops28h 10mUnited Airlines

Deal found 10/23

$348

Sat 11/225:30 pmSDU - IAD

2 stops24h 25mUnited Airlines

Deal found 10/21

$353

Tue 1/132:00 pmSDU - IAD

3 stops49h 16mMultiple Airlines

Deal found 10/23

$386

Sat 12/65:30 pmSDU - IAD

1 stop15h 05mUnited Airlines

Deal found 10/22

$413

Sat 12/68:05 amSDU - IAD

2 stops17h 28mMultiple Airlines

Deal found 10/22

$422

Thu 11/205:15 pmSDU - IAD

3 stops40h 30mMultiple Airlines

Deal found 10/23

$431

Fri 1/168:05 pmSDU - IAD

3 stops23h 33mMultiple Airlines

Deal found 10/23

$432

Sat 1/172:40 pmSDU - IAD

3 stops32h 53mMultiple Airlines

Deal found 10/23

$436

Thu 1/158:10 amSDU - IAD

3 stops36h 37mMultiple Airlines

Deal found 10/23

$508

Cheap flight deals from Santos Dumont to Dulles Intl

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$603 (Air Canada)
One-way from	$343 (United Airlines)
Popular in	June
Cheapest in	March
Average price	$523

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

Search Deals

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

Search Deals

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. 7% potential increase in price ($49 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 October 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

Fri 3/13

11:25 am-8:59 pm

2 stops34h 34m

Washington, D.C. Dulles Intl

Fri 3/20

9:55 am-2:20 pm

2 stops27h 25m

$607

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Wed 11/26

1:45 pm-6:35 am

1 stop18h 50m

Washington, D.C. Dulles Intl

Tue 12/2

6:30 am-4:40 pm

2 stops32h 10m

$731

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Tue 11/25

1:45 pm-11:49 am

2 stops24h 04m

Washington, D.C. Dulles Intl

Tue 12/2

6:30 am-4:40 pm

2 stops32h 10m

$736

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Fri 11/14

1:45 pm-9:23 pm

2 stops33h 38m

Washington, D.C. Dulles Intl

Tue 12/2

6:30 am-4:40 pm

2 stops32h 10m

$736

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sun 2/1

2:00 pm-11:53 am

2 stops23h 53m

Washington, D.C. Dulles Intl

Wed 2/4

4:00 pm-1:15 pm

2 stops19h 15m

$787

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Mon 11/24

1:45 pm-10:12 pm

2 stops34h 27m

Washington, D.C. Dulles Intl

Tue 12/2

6:30 am-4:40 pm

2 stops32h 10m

$806

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Thu 11/27

1:45 pm-11:28 am

2 stops23h 43m

Washington, D.C. Dulles Intl

Tue 12/2

6:30 am-4:40 pm

2 stops32h 10m

$806

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sun 2/1

2:50 pm-6:35 am

1 stop17h 45m

Washington, D.C. Dulles Intl

Wed 2/4

6:03 am-2:20 pm

2 stops30h 17m

$856

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Tue 11/25

1:45 pm-6:35 am

1 stop18h 50m

Washington, D.C. Dulles Intl

Wed 12/3

8:20 am-4:40 pm

2 stops30h 20m

$858

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sun 3/22

2:55 pm-11:55 pm

2 stops34h 00m

Washington, D.C. Dulles Intl

Sat 4/4

10:30 pm-5:45 pm

1 stop18h 15m

$863

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/21

Showing 1-10 of 18 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 18h 50m. 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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$343+ 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 11/12. 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

Find 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 October 23, 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 October 23, 2025.

Cheap flight deals from Santos Dumont to Dulles Intl

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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 October 23, 2025.