What is the cheapest day to fly from Washington, D.C. to Rio de Janeiro Santos Dumont Airport?

Travelers seeking maximum savings on their Washington, D.C. to Rio de Janeiro Santos Dumont Airport flight should consider departing on Wednesday at noon when fares are most often at their lowest. Wednesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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 are the most popular routes from Washington, D.C. to Rio de Janeiro Santos Dumont Airport?

When deciding which route to take from Washington, D.C. to Rio de Janeiro Santos Dumont Airport consider Washington, D.C. Dulles Intl - Rio de Janeiro Santos Dumont, Washington, D.C. Reagan-National - Rio de Janeiro Santos Dumont or Baltimore/Washington - Rio de Janeiro Santos Dumont as they are the most popular.

Can I find deals for flights from Washington, D.C. to Santos Dumont that include hotel bookings?

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

How can I find direct flights from Washington, D.C. to Santos Dumont?

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

Can I find deals for business class flights from Washington, D.C. to Santos Dumont?

Yes. Cheapflights offers flight deals from Washington, D.C. 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.

$274+ Flights from Washington, D.C. to Rio de Janeiro Santos Dumont Airport, Brazil

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Cheap flight deals from Washington, D.C. to Santos Dumont

Round-trip from	$615 (KAYAK)
One-way from	$274 (123 Milhas)
Popular in	December
Cheapest in	October
Average price	$574

From Washington, D.C. (WAS) to Rio de Janeiro Santos Dumont

Search Deals

One-way flight from Washington, D.C. (WAS) to Rio de Janeiro Santos Dumont

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Highest demand for flights based on searches. 11% potential increase in price ($89 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from Washington, D.C. to Santos Dumont

Cheapest flights from Washington, D.C. to Santos Dumont
Explore the most affordable flight options available from Washington, D.C. to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

Mon 10/274:03 pmDCA - SDU

2 stops18h 32mLATAM Airlines

Sun 11/95:10 pmSDU - DCA

2 stops20h 20mLATAM Airlines

Deal found 9/15

$615

Mon 10/138:21 pmBWI - SDU

2 stops25h 04mMultiple Airlines

Sun 10/266:15 amSDU - BWI

3 stops42h 18mMultiple Airlines

Deal found 9/15

$645

Mon 10/206:18 amBWI - SDU

2 stops24h 02mLATAM Airlines

Sun 11/28:05 pmSDU - BWI

2 stops19h 38mLATAM Airlines

Deal found 9/16

$651

Tue 10/145:45 amIAD - SDU

3 stops31h 35mMultiple Airlines

Tue 10/2111:30 amSDU - IAD

2 stops19h 05mMultiple Airlines

Deal found 9/14

$652

Mon 11/241:51 pmBWI - SDU

2 stops17h 34mLATAM Airlines

Sun 12/78:05 pmSDU - BWI

2 stops16h 07mLATAM Airlines

Deal found 9/15

$660

Fri 11/285:45 amIAD - SDU

2 stops24h 10mMultiple Airlines

Thu 12/48:50 amSDU - IAD

2 stops21h 35mMultiple Airlines

Deal found 9/14

$661

Wed 11/52:40 pmDCA - SDU

2 stops40h 45mLATAM Airlines

Mon 11/102:00 pmSDU - DCA

2 stops49h 58mLATAM Airlines

Deal found 9/14

$662

Wed 10/298:00 amBWI - SDU

2 stops29h 10mMultiple Airlines

Wed 11/56:00 amSDU - BWI

2 stops16h 32mMultiple Airlines

Deal found 9/14

$665

Fri 11/71:41 pmBWI - SDU

2 stops19h 14mLATAM Airlines

Sun 11/168:05 pmSDU - BWI

2 stops19h 49mLATAM Airlines

Deal found 9/13

$674

Mon 11/36:22 pmBWI - SDU

2 stops19h 38mLATAM Airlines

Sun 11/168:05 pmSDU - BWI

2 stops19h 49mLATAM Airlines

Deal found 9/15

$675

Wed 11/53:31 pmBWI - SDU

2 stops19h 34mMultiple Airlines

Mon 11/108:25 pmSDU - BWI

2 stops26h 07mMultiple Airlines

Deal found 9/15

$678

Mon 12/14:10 pmDCA - SDU

2 stops22h 35mMultiple Airlines

Sun 12/142:00 pmSDU - DCA

2 stops34h 02mMultiple Airlines

Deal found 9/16

$682

Best flights from Washington, D.C. to Santos Dumont
Discover carefully curated flight deals from Washington, D.C. to Santos Dumont that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2025.

Sat 2/1411:05 amDCA - SDU

2 stops28h 40mAir Canada

Mon 2/1611:25 amSDU - DCA

2 stops25h 01mAir Canada

Deal found 9/15

$623

Mon 10/138:21 pmBWI - SDU

2 stops25h 04mMultiple Airlines

Sun 10/266:15 amSDU - BWI

3 stops42h 18mMultiple Airlines

Deal found 9/15

$645

Mon 11/241:51 pmBWI - SDU

2 stops17h 34mLATAM Airlines

Sun 12/78:05 pmSDU - BWI

2 stops16h 07mLATAM Airlines

Deal found 9/16

$660

Mon 10/1310:35 pmIAD - SDU

1 stop14h 45mUnited Airlines

Sun 10/262:50 pmSDU - IAD

1 stop16h 50mUnited Airlines

Deal found 9/15

$745

Sat 2/1411:05 amDCA - SDU

2 stops28h 40mAir Canada

Wed 2/2511:25 amSDU - DCA

2 stops25h 01mAir Canada

Deal found 9/14

$623

Fri 11/285:45 amIAD - SDU

2 stops24h 10mMultiple Airlines

Thu 12/48:50 amSDU - IAD

2 stops21h 35mMultiple Airlines

Deal found 9/14

$661

Wed 11/52:40 pmDCA - SDU

2 stops40h 45mLATAM Airlines

Mon 11/108:05 pmSDU - DCA

2 stops43h 53mLATAM Airlines

Deal found 9/15

$662

Sun 2/156:00 amDCA - SDU

2 stops30h 20mAir Canada

Wed 2/2511:25 amSDU - DCA

2 stops25h 01mAir Canada

Deal found 9/14

$623

Fri 11/71:41 pmBWI - SDU

2 stops19h 14mLATAM Airlines

Sun 11/168:05 pmSDU - BWI

2 stops19h 49mLATAM Airlines

Deal found 9/13

$674

Tue 10/2811:30 pmIAD - SDU

1 stop16h 15mUnited Airlines

Mon 11/31:45 pmSDU - IAD

1 stop18h 50mUnited Airlines

Deal found 9/14

$745

Wed 11/53:31 pmBWI - SDU

2 stops19h 34mMultiple Airlines

Mon 11/108:25 pmSDU - BWI

2 stops26h 07mMultiple Airlines

Deal found 9/15

$678

Sat 2/144:10 pmDCA - SDU

2 stops23h 35mAir Canada

Tue 2/2411:25 amSDU - DCA

2 stops23h 30mAir Canada

Deal found 9/14

$629

Mon 10/206:50 pmIAD - SDU

2 stops18h 30mUnited Airlines

Tue 10/281:45 pmSDU - IAD

1 stop17h 55mUnited Airlines

Deal found 9/16

$750

Sat 2/149:30 amBWI - SDU

2 stops32h 00mLATAM Airlines

Sun 3/12:00 pmSDU - BWI

2 stops21h 15mLATAM Airlines

Deal found 9/15

$689

Thu 11/63:00 amIAD - SDU

3 stops26h 55mMultiple Airlines

Sun 11/168:30 amSDU - IAD

2 stops21h 55mMultiple Airlines

Deal found 9/13

$697

Wed 11/512:50 pmDCA - SDU

2 stops25h 55mUnited Airlines

Mon 11/101:45 pmSDU - DCA

2 stops23h 08mUnited Airlines

Deal found 9/14

$759

Tue 10/2811:05 amDCA - SDU

2 stops28h 45mAir Canada

Mon 11/31:45 pmSDU - DCA

2 stops22h 41mAir Canada

Deal found 9/14

$698

Mon 10/203:20 pmIAD - SDU

2 stops22h 00mMultiple Airlines

Tue 10/281:45 pmSDU - IAD

2 stops25h 30mMultiple Airlines

Deal found 9/16

$704

Mon 11/102:35 pmDCA - SDU

2 stops16h 50mLATAM Airlines

Mon 11/172:00 pmSDU - DCA

2 stops25h 58mLATAM Airlines

Deal found 9/15

$713

Sun 10/126:30 amIAD - SDU

2 stops30h 50mUnited Airlines

Sun 10/262:50 pmSDU - IAD

1 stop16h 50mUnited Airlines

Deal found 9/15

$762

Wed 10/17:49 pmBWI - SDU

2 stops34h 16mMultiple Airlines

Sun 10/56:10 amSDU - BWI

3 stops35h 48mMultiple Airlines

Deal found 9/14

$736

Mon 9/292:55 pmDCA - SDU

2 stops45h 25mLATAM Airlines

Thu 10/238:20 pmSDU - DCA

2 stops42h 25mLATAM Airlines

Deal found 9/16

$741

Thu 10/306:16 pmBWI - SDU

2 stops21h 29mUnited Airlines

Thu 11/61:45 pmSDU - BWI

2 stops22h 14mUnited Airlines

Deal found 9/15

$780

Wed 11/52:35 pmIAD - SDU

2 stops20h 40mMultiple Airlines

Mon 11/108:05 pmSDU - IAD

2 stops19h 10mMultiple Airlines

Deal found 9/14

$739

Mon 12/16:21 pmBWI - SDU

2 stops19h 39mLATAM Airlines

Sun 12/148:55 amSDU - BWI

2 stops27h 17mLATAM Airlines

Deal found 9/16

$750

Wed 10/153:20 pmIAD - SDU

2 stops21h 00mMultiple Airlines

Thu 10/238:20 pmSDU - IAD

2 stops18h 40mMultiple Airlines

Deal found 9/16

$749

Tue 10/146:56 amBWI - SDU

3 stops23h 39mMultiple Airlines

Tue 10/213:15 pmSDU - BWI

2 stops20h 46mMultiple Airlines

Deal found 9/14

$766

Tue 10/78:00 amBWI - SDU

3 stops37h 25mMultiple Airlines

Sun 10/126:20 amSDU - BWI

2 stops30h 34mMultiple Airlines

Deal found 9/16

$814

Last-minute flights from Washington, D.C. to Santos Dumont
Discover last-minute flight deals from Washington, D.C. to Santos Dumont. Data last updated September 16, 2025 and is based on user searches.

Wed 10/17:49 pmBWI - SDU

2 stops34h 16mMultiple Airlines

Sat 10/1810:05 amSDU - BWI

2 stops25h 56mMultiple Airlines

Deal found 9/14

$720

Mon 10/138:21 pmBWI - SDU

2 stops25h 04mMultiple Airlines

Sun 10/266:15 amSDU - BWI

3 stops42h 18mMultiple Airlines

Deal found 9/15

$645

Tue 10/145:45 amIAD - SDU

3 stops31h 35mMultiple Airlines

Tue 10/2111:30 amSDU - IAD

2 stops19h 05mMultiple Airlines

Deal found 9/14

$652

Mon 10/206:18 amBWI - SDU

2 stops24h 02mLATAM Airlines

Sun 11/28:05 pmSDU - BWI

2 stops19h 38mLATAM Airlines

Deal found 9/16

$651

Mon 10/205:45 amIAD - SDU

3 stops24h 50mMultiple Airlines

Tue 10/288:10 amSDU - IAD

2 stops22h 15mMultiple Airlines

Deal found 9/16

$697

Mon 10/274:03 pmDCA - SDU

2 stops18h 32mLATAM Airlines

Sun 11/95:10 pmSDU - DCA

2 stops20h 20mLATAM Airlines

Deal found 9/15

$615

Mon 10/274:31 pmBWI - SDU

3 stops20h 59mMultiple Airlines

Sun 11/93:05 pmSDU - BWI

2 stops31h 27mMultiple Airlines

Deal found 9/15

$715

Tue 10/2811:05 amDCA - SDU

2 stops28h 45mAir Canada

Mon 11/31:45 pmSDU - DCA

2 stops22h 41mAir Canada

Deal found 9/14

$698

Tue 10/289:45 amIAD - SDU

2 stops30h 05mAir Canada

Mon 11/31:45 pmSDU - IAD

2 stops33h 09mAir Canada

Deal found 9/14

$698

Wed 10/298:00 amBWI - SDU

2 stops29h 10mMultiple Airlines

Wed 11/56:00 amSDU - BWI

2 stops16h 32mMultiple Airlines

Deal found 9/14

$665

Wed 10/292:40 pmDCA - SDU

2 stops17h 45mLATAM Airlines

Wed 11/58:05 pmSDU - DCA

2 stops19h 40mLATAM Airlines

Deal found 9/14

$713

Thu 10/306:53 amBWI - SDU

3 stops24h 32mMultiple Airlines

Thu 11/611:35 amSDU - BWI

2 stops34h 57mMultiple Airlines

Deal found 9/15

$687

One-way flights from Washington, D.C. to Santos Dumont
Search for one-way flight options from Washington, D.C. to Santos Dumont. Find affordable one-way fares based on user searches. Data last updated September 16, 2025.

Thu 12/42:55 pmDCA - SDU

2 stops20h 20mLATAM Airlines

Deal found 9/15

$274

Mon 10/276:00 amDCA - SDU

2 stops26h 25mLATAM Airlines

Deal found 9/15

$276

Tue 10/217:35 pmDCA - SDU

2 stops19h 45mLATAM Airlines

Deal found 9/16

$290

Mon 12/17:49 pmIAD - SDU

2 stops18h 11mLATAM Airlines

Deal found 9/15

$290

Mon 10/65:55 pmBWI - SDU

2 stops27h 30mMultiple Airlines

Deal found 9/15

$292

Mon 10/205:00 pmDCA - SDU

2 stops19h 40mLATAM Airlines

Deal found 9/16

$295

Mon 11/1012:11 pmIAD - SDU

2 stops23h 04mLATAM Airlines

Deal found 9/15

$295

Mon 11/310:20 amDCA - SDU

2 stops23h 10mLATAM Airlines

Deal found 9/15

$300

Thu 10/912:27 pmIAD - SDU

2 stops30h 38mLATAM Airlines

Deal found 9/15

$300

Mon 11/39:41 pmBWI - SDU

2 stops39h 19mMultiple Airlines

Deal found 9/15

$301

Sat 10/118:17 pmBWI - SDU

2 stops25h 08mMultiple Airlines

Deal found 9/15

$303

Mon 10/276:18 amBWI - SDU

2 stops26h 07mLATAM Airlines

Deal found 9/15

$304

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. 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

Sat 2/14

11:05 am-5:45 pm

2 stops28h 40m

Rio de Janeiro Santos Dumont

Mon 2/16

11:25 am-10:26 am

2 stops25h 01m

$623

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Sat 2/14

11:05 am-5:45 pm

2 stops28h 40m

Rio de Janeiro Santos Dumont

Wed 2/25

11:25 am-10:26 am

2 stops25h 01m

$623

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Sun 2/15

6:00 am-2:20 pm

2 stops30h 20m

Rio de Janeiro Santos Dumont

Wed 2/25

11:25 am-10:26 am

2 stops25h 01m

$623

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Sat 2/14

4:10 pm-5:45 pm

2 stops23h 35m

Rio de Janeiro Santos Dumont

Tue 2/24

11:25 am-8:55 am

2 stops23h 30m

$629

BaltimoreRio de Janeiro

BWI - SDU

BWISDU

Baltimore/Washington

Mon 10/13

8:21 pm-10:25 pm

2 stops25h 04m

Rio de Janeiro Santos Dumont

Sun 10/26

6:15 am-11:33 pm

3 stops42h 18m

$645

BaltimoreRio de Janeiro

BWI - SDU

BWISDU

Baltimore/Washington

Mon 11/24

1:51 pm-9:25 am

2 stops17h 34m

Rio de Janeiro Santos Dumont

Sun 12/7

8:05 pm-10:12 am

2 stops16h 07m

$660

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Fri 11/28

5:45 am-7:55 am

2 stops24h 10m

Rio de Janeiro Santos Dumont

Thu 12/4

8:50 am-4:25 am

2 stops21h 35m

$661

Washington, D.C.Rio de Janeiro

DCA - SDU

DCASDU

Washington, D.C. Reagan-National

Wed 11/5

2:40 pm-9:25 am

2 stops40h 45m

Rio de Janeiro Santos Dumont

Mon 11/10

8:05 pm-1:58 pm

2 stops43h 53m

$662

BaltimoreRio de Janeiro

BWI - SDU

BWISDU

Baltimore/Washington

Fri 11/7

1:41 pm-10:55 am

2 stops19h 14m

Rio de Janeiro Santos Dumont

Sun 11/16

8:05 pm-1:54 pm

2 stops19h 49m

$674

BaltimoreRio de Janeiro

BWI - SDU

BWISDU

Baltimore/Washington

Wed 11/5

3:31 pm-1:05 pm

2 stops19h 34m

Rio de Janeiro Santos Dumont

Mon 11/10

8:25 pm-8:32 pm

2 stops26h 07m

$678

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 56 results

...

Best time to book a flight from Washington, D.C. to Santos Dumont

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from Washington, D.C. 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 Washington, D.C. to Rio de Janeiro Santos Dumont Airport

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

It’s optimal to fly from Washington, D.C. to Rio de Janeiro Santos Dumont Airport in the afternoon. By choosing this option you can save up to 29% on the cost of your flight, compared to a flight at noon.

Related info for your journey

How long is the flight from Washington, D.C. to Rio de Janeiro Santos Dumont Airport?
Departing from Washington, D.C. to Rio de Janeiro Santos Dumont Airport will take you 17h 34m. Airlines will cover a distance of 4802 mi. This flight may include one or multiple stops.
What are the most popular routes from Washington, D.C. to Rio de Janeiro Santos Dumont Airport?
When deciding which route to take from Washington, D.C. to Rio de Janeiro Santos Dumont Airport consider Washington, D.C. Dulles Intl - Rio de Janeiro Santos Dumont, Washington, D.C. Reagan-National - Rio de Janeiro Santos Dumont or Baltimore/Washington - Rio de Janeiro Santos Dumont as they are the most popular.
Can I find deals for flights from Washington, D.C. to Santos Dumont that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Santos Dumont flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Santos Dumont?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Santos Dumont.
Can I find deals for business class flights from Washington, D.C. to Santos Dumont?
Yes. Cheapflights offers flight deals from Washington, D.C. 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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$274+ Cheap flights from Washington, D.C. (WAS) 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Washington, D.C. to Santos Dumont with Cheapflights

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Cheap flight deals from Washington, D.C. to Santos Dumont

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Find flight deals from Washington, D.C. to Santos Dumont

Cheapest flights from Washington, D.C. to Santos DumontExplore the most affordable flight options available from Washington, D.C. to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

Explore the most affordable flight options available from Washington, D.C. to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Rio de Janeiro Santos Dumont Airport that are best for you.

Best time to book a flight from Washington, D.C. to Santos Dumont

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from Washington, D.C. with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Rio de Janeiro Santos Dumont Airport

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

Find hourly flight availability from Washington, D.C. to Santos Dumont. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

Related info for your journey

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

What are the most popular routes from Washington, D.C. to Rio de Janeiro Santos Dumont Airport?

Can I find deals for flights from Washington, D.C. to Santos Dumont that include hotel bookings?

How can I find direct flights from Washington, D.C. to Santos Dumont?

Can I find deals for business class flights from Washington, D.C. to Santos Dumont?

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Cheapest flights from Washington, D.C. to Santos Dumont
Explore the most affordable flight options available from Washington, D.C. to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.