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 DC to SDU?

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

Can I find deals for flights from District of Columbia to Santos Dumont that include hotel bookings?

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

How can I find direct flights from District of Columbia to Santos Dumont?

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

Can I find deals for business class flights from District of Columbia to Santos Dumont?

Yes. Cheapflights offers flight deals from District of Columbia 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.

$265+ Flights from District of Columbia to Rio de Janeiro Santos Dumont Airport, Brazil

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Cheap flight deals from District of Columbia to Santos Dumont

Cheapest flights from District of Columbia to Santos Dumont
Explore the most affordable flight options available from District of Columbia to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.

Tue 12/236:49 pmDCA - SDU

2 stops36h 36mDelta

Fri 1/238:05 pmSDU - DCA

2 stops28h 04mDelta

Deal found 12/20

$566

Tue 12/236:49 pmDCA - SDU

2 stops36h 36mDelta

Sat 1/248:05 pmSDU - DCA

2 stops42h 34mDelta

Deal found 12/20

$573

Tue 12/236:49 pmDCA - SDU

2 stops36h 36mDelta

Wed 1/218:05 pmSDU - DCA

2 stops16h 23mDelta

Deal found 12/20

$675

Fri 12/265:42 pmDCA - SDU

2 stops41h 33mDelta

Fri 1/238:05 pmSDU - DCA

2 stops28h 04mDelta

Deal found 12/20

$787

Thu 12/259:55 amDCA - SDU

2 stops45h 40mDelta

Fri 1/238:05 pmSDU - DCA

2 stops28h 04mDelta

Deal found 12/20

$790

Fri 12/264:10 pmDCA - SDU

2 stops43h 05mDelta

Thu 1/228:05 pmSDU - DCA

2 stops42h 34mDelta

Deal found 12/20

$795

Thu 12/252:00 pmDCA - SDU

2 stops41h 35mDelta

Thu 1/228:05 pmSDU - DCA

2 stops42h 34mDelta

Deal found 12/20

$798

Mon 12/224:55 pmIAD - SDU

2 stops18h 20mLATAM Airlines

Wed 1/214:50 pmSDU - IAD

2 stops20h 53mLATAM Airlines

Deal found 12/20

$879

Tue 12/234:55 pmIAD - SDU

2 stops23h 50mLATAM Airlines

Wed 1/214:50 pmSDU - IAD

2 stops20h 53mLATAM Airlines

Deal found 12/20

$881

Mon 12/228:09 pmDCA - SDU

2 stops59h 16mDelta

Fri 1/238:05 pmSDU - DCA

2 stops28h 04mDelta

Deal found 12/20

$888

Mon 12/228:09 pmDCA - SDU

2 stops59h 16mDelta

Thu 1/228:05 pmSDU - DCA

2 stops42h 34mDelta

Deal found 12/20

$896

Thu 12/259:55 amDCA - SDU

2 stops45h 40mDelta

Wed 1/218:05 pmSDU - DCA

2 stops16h 23mDelta

Deal found 12/20

$899

Best flights from District of Columbia to Santos Dumont
Discover carefully curated flight deals from District of Columbia to Santos Dumont that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 21, 2025.

Sun 3/85:05 pmDCA - SDU

2 stops15h 20mLATAM Airlines

Sat 3/145:45 pmSDU - DCA

2 stops21h 23mLATAM Airlines

Deal found 12/20

$559

Fri 1/2311:05 amDCA - SDU

2 stops25h 30mAir Canada

Sat 1/3111:20 amSDU - DCA

2 stops25h 03mAir Canada

Deal found 12/19

$629

Wed 3/410:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Thu 3/191:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Deal found 12/19

$704

Thu 3/53:00 amIAD - SDU

3 stops26h 55mMultiple Airlines

Sat 3/146:50 pmSDU - IAD

3 stops34h 20mMultiple Airlines

Deal found 12/21

$721

Thu 3/195:05 pmDCA - SDU

2 stops15h 20mLATAM Airlines

Thu 3/268:05 pmSDU - DCA

2 stops16h 16mLATAM Airlines

Deal found 12/20

$559

Tue 3/32:00 pmDCA - SDU

2 stops17h 25mLATAM Airlines

Tue 3/108:05 pmSDU - DCA

2 stops16h 16mLATAM Airlines

Deal found 12/20

$559

Mon 1/269:40 amDCA - SDU

2 stops26h 30mAir Canada

Mon 2/211:20 amSDU - DCA

2 stops25h 03mAir Canada

Deal found 12/18

$632

Tue 3/171:19 pmIAD - SDU

2 stops19h 06mLATAM Airlines

Tue 3/315:45 pmSDU - IAD

2 stops19h 54mLATAM Airlines

Deal found 12/20

$559

Tue 3/39:45 amIAD - SDU

2 stops28h 55mAir Canada

Tue 3/101:45 pmSDU - IAD

2 stops31h 41mAir Canada

Deal found 12/20

$632

Sun 3/110:30 pmIAD - SDU

1 stop16h 10mUnited Airlines

Thu 3/191:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Deal found 12/19

$704

Mon 3/25:00 pmDCA - SDU

2 stops18h 05mLATAM Airlines

Tue 3/108:05 pmSDU - DCA

2 stops16h 31mLATAM Airlines

Deal found 12/21

$564

Mon 3/26:59 amDCA - SDU

2 stops31h 41mAir Canada

Tue 3/101:45 pmSDU - DCA

2 stops29h 20mAir Canada

Deal found 12/21

$636

Mon 3/21:02 pmIAD - SDU

2 stops25h 38mUnited Airlines

Thu 3/191:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Deal found 12/19

$709

Fri 3/612:24 pmIAD - SDU

2 stops22h 51mLATAM Airlines

Sat 3/143:35 pmSDU - IAD

2 stops22h 04mLATAM Airlines

Deal found 12/21

$624

Tue 1/209:45 amIAD - SDU

2 stops26h 25mAir Canada

Mon 1/2611:20 amSDU - IAD

2 stops26h 15mAir Canada

Deal found 12/20

$704

Sun 3/87:59 pmIAD - SDU

2 stops20h 01mLATAM Airlines

Sat 3/148:05 pmSDU - IAD

2 stops17h 34mLATAM Airlines

Deal found 12/20

$629

Mon 3/23:42 pmIAD - SDU

2 stops22h 18mLATAM Airlines

Tue 3/104:50 pmSDU - IAD

2 stops20h 49mLATAM Airlines

Deal found 12/21

$629

Thu 3/195:05 pmDCA - SDU

2 stops15h 20mLATAM Airlines

Thu 4/28:20 pmSDU - DCA

2 stops16h 01mLATAM Airlines

Deal found 12/20

$655

Fri 3/62:00 pmDCA - SDU

2 stops17h 35mLATAM Airlines

Sat 3/148:05 pmSDU - DCA

2 stops19h 03mLATAM Airlines

Deal found 12/21

$668

Wed 3/185:05 pmDCA - SDU

2 stops15h 20mLATAM Airlines

Wed 4/18:20 pmSDU - DCA

2 stops16h 01mLATAM Airlines

Deal found 12/20

$764

Sun 2/155:00 pmDCA - SDU

2 stops18h 15mLATAM Airlines

Tue 2/248:05 pmSDU - DCA

2 stops16h 21mLATAM Airlines

Deal found 12/20

$771

Last-minute flights from District of Columbia to Santos Dumont
Discover last-minute flight deals from District of Columbia to Santos Dumont. Data last updated December 21, 2025 and is based on user searches.

Tue 12/236:49 pmDCA - SDU

2 stops36h 36mDelta

Fri 1/238:05 pmSDU - DCA

2 stops28h 04mDelta

Deal found 12/20

$566

Tue 12/235:42 pmDCA - SDU

2 stops37h 43mDelta

Thu 1/228:05 pmSDU - DCA

2 stops42h 34mDelta

Deal found 12/20

$573

Tue 12/236:49 pmDCA - SDU

2 stops36h 36mDelta

Wed 1/218:05 pmSDU - DCA

2 stops16h 23mDelta

Deal found 12/20

$675

Sun 1/185:45 amIAD - SDU

2 stops25h 25mMultiple Airlines

Sun 1/257:50 amSDU - IAD

2 stops22h 35mMultiple Airlines

Deal found 12/19

$773

Mon 1/195:16 pmIAD - SDU

2 stops18h 54mMultiple Airlines

Mon 1/262:00 pmSDU - IAD

2 stops23h 43mMultiple Airlines

Deal found 12/20

$689

Mon 1/194:30 pmIAD - SDU

2 stops19h 40mAir Canada

Mon 1/2611:20 amSDU - IAD

2 stops31h 04mAir Canada

Deal found 12/20

$707

Tue 1/206:00 amDCA - SDU

2 stops30h 10mAir Canada

Mon 1/2611:20 amSDU - DCA

2 stops30h 13mAir Canada

Deal found 12/20

$704

Tue 1/209:45 amIAD - SDU

2 stops26h 25mAir Canada

Mon 1/2611:20 amSDU - IAD

2 stops26h 15mAir Canada

Deal found 12/20

$704

Wed 1/215:00 pmDCA - SDU

2 stops18h 15mLATAM Airlines

Mon 1/268:05 pmSDU - DCA

2 stops16h 23mLATAM Airlines

Deal found 12/20

$668

Fri 1/2311:05 amDCA - SDU

2 stops25h 30mAir Canada

Sat 1/3111:20 amSDU - DCA

2 stops25h 03mAir Canada

Deal found 12/19

$629

Fri 1/239:45 amIAD - SDU

2 stops26h 50mAir Canada

Wed 1/2811:20 amSDU - IAD

2 stops35h 34mAir Canada

Deal found 12/19

$630

Mon 1/269:40 amDCA - SDU

2 stops26h 30mAir Canada

Mon 2/211:20 amSDU - DCA

2 stops25h 03mAir Canada

Deal found 12/18

$632

One-way flights from District of Columbia to Santos Dumont
Search for one-way flight options from District of Columbia to Santos Dumont. Find affordable one-way fares based on user searches. Data last updated December 21, 2025.

Wed 12/312:00 pmDCA - SDU

2 stops17h 25mDelta

Deal found 12/20

$265

Tue 12/304:55 pmIAD - SDU

2 stops18h 20mDelta

Deal found 12/20

$265

Wed 12/312:00 pmDCA - SDU

2 stops17h 25mLATAM Airlines

Deal found 12/18

$275

Thu 1/85:00 pmDCA - SDU

2 stops19h 35mLATAM Airlines

Deal found 12/20

$280

Sun 1/1112:23 pmIAD - SDU

2 stops22h 42mLATAM Airlines

Deal found 12/20

$280

Mon 1/127:19 pmIAD - SDU

3 stops35h 51mMultiple Airlines

Deal found 12/20

$304

Wed 12/3110:30 pmIAD - SDU

1 stop14h 00mUnited Airlines

Deal found 12/20

$341

Thu 1/11:00 pmDCA - SDU

2 stops23h 30mUnited Airlines

Deal found 12/20

$345

Mon 1/264:59 pmDCA - SDU

2 stops15h 46mGOL

Deal found 12/18

$356

Tue 12/307:00 pmDCA - SDU

2 stops41h 30mUnited Airlines

Deal found 12/19

$358

Sat 1/310:33 pmIAD - SDU

2 stops37h 32mUnited Airlines

Deal found 12/20

$358

Tue 12/309:58 pmIAD - SDU

3 stops33h 27mMultiple Airlines

Deal found 12/20

$368

Find flight deals from District of Columbia to Santos Dumont

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$559 (FlightHub)
One-way from	$265 (Delta)
Popular in	December
Cheapest in	May
Average price	$898

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

Search Deals

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

Search Deals

From District of Columbia to Rio de Janeiro Santos Dumont

Search Deals

One-way flight from District of Columbia 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 District of Columbia 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

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Sun 3/8

5:05 pm-9:25 am

2 stops15h 20m

Rio de Janeiro Santos Dumont

Sat 3/14

5:45 pm-2:08 pm

2 stops21h 23m

$559

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Thu 3/19

5:05 pm-9:25 am

2 stops15h 20m

Rio de Janeiro Santos Dumont

Thu 3/26

8:05 pm-11:21 am

2 stops16h 16m

$559

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Tue 3/3

2:00 pm-9:25 am

2 stops17h 25m

Rio de Janeiro Santos Dumont

Tue 3/10

8:05 pm-11:21 am

2 stops16h 16m

$559

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Tue 3/17

1:19 pm-9:25 am

2 stops19h 06m

Rio de Janeiro Santos Dumont

Tue 3/31

5:45 pm-12:39 pm

2 stops19h 54m

$559

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Mon 3/2

5:00 pm-1:05 pm

2 stops18h 05m

Rio de Janeiro Santos Dumont

Tue 3/10

8:05 pm-11:36 am

2 stops16h 31m

$564

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Fri 3/6

12:24 pm-1:15 pm

2 stops22h 51m

Rio de Janeiro Santos Dumont

Sat 3/14

3:35 pm-12:39 pm

2 stops22h 04m

$624

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Fri 1/23

11:05 am-2:35 pm

2 stops25h 30m

Rio de Janeiro Santos Dumont

Sat 1/31

11:20 am-10:23 am

2 stops25h 03m

$629

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Sun 3/8

7:59 pm-5:00 pm

2 stops20h 01m

Rio de Janeiro Santos Dumont

Sat 3/14

8:05 pm-12:39 pm

2 stops17h 34m

$629

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Mon 3/2

3:42 pm-4:00 pm

2 stops22h 18m

Rio de Janeiro Santos Dumont

Tue 3/10

4:50 pm-12:39 pm

2 stops20h 49m

$629

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Mon 1/26

9:40 am-2:10 pm

2 stops26h 30m

Rio de Janeiro Santos Dumont

Mon 2/2

11:20 am-10:23 am

2 stops25h 03m

$632

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 41 results

...

Best time to book a flight from District of Columbia to Santos Dumont

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from District of Columbia 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.

Cheapflights Insights

Everything you need to know about your flight from District of Columbia to Rio de Janeiro Santos Dumont Airport

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from District of Columbia to Rio de Janeiro Santos Dumont Airport?
Departing from District of Columbia to Rio de Janeiro Santos Dumont Airport will take you 15h 20m. Airlines will cover a distance of 4794 mi. Both multi-stop and nonstop flights can be found to your destination and back.
Can I find deals for flights from District of Columbia to Santos Dumont that include hotel bookings?
Yes. In addition to deals on District of Columbia to Santos Dumont flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from District of Columbia to Santos Dumont?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from District of Columbia to Santos Dumont.
Can I find deals for business class flights from District of Columbia to Santos Dumont?
Yes. Cheapflights offers flight deals from District of Columbia 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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$265+ Cheap flights from District of Columbia 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from District of Columbia 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 District of Columbia to Santos Dumont

Cheapest flights from District of Columbia to Santos DumontExplore the most affordable flight options available from District of Columbia to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.

Explore the most affordable flight options available from District of Columbia to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.

Find flight deals from District of Columbia to Santos Dumont

Keep the following information in mind while searching for District of Columbia to Santos Dumont flight deals. Data was last updated December 21, 2025.

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 District of Columbia to Rio de Janeiro Santos Dumont Airport that are best for you.

Best time to book a flight from District of Columbia to Santos Dumont

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

Cheapflights Insights

Everything you need to know about your flight from District of Columbia to Rio de Janeiro Santos Dumont Airport

Related info for your journey

Find useful and relevant information for your journey from District of Columbia 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 District of Columbia to Rio de Janeiro Santos Dumont Airport?

Can I find deals for flights from District of Columbia to Santos Dumont that include hotel bookings?

How can I find direct flights from District of Columbia to Santos Dumont?

Can I find deals for business class flights from District of Columbia to Santos Dumont?

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Cheapest flights from District of Columbia to Santos Dumont
Explore the most affordable flight options available from District of Columbia to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 21, 2025.