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).

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport?

Find a great deal and save up to 127% by booking at least 56 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport within the next two weeks, with the cheapest ticket starting at $543.

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

Flights from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport lean towards being more expensive in December. Prices are generally better when you fly from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport in May, with the cheapest ticket starting at $318.

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

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

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

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

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

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

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

Yes. Cheapflights offers flight deals from Dulles Intl 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.

$333+ Flights from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport, Brazil

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Cheap flight deals from Dulles Intl to Santos Dumont

Round-trip from	$613 (KAYAK)
One-way from	$333 (CheapOair)
Popular in	December
Cheapest in	May
Average price	$760

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

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

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Highest demand for flights based on searches. 8% potential increase in price ($70 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from Dulles Intl to Santos Dumont

Cheapest flights from Dulles Intl to Santos Dumont
Explore the most affordable flight options available from Dulles Intl to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Tue 9/3012:35 pmIAD - SDU

2 stops21h 30mLATAM Airlines

Tue 10/75:40 pmSDU - IAD

2 stops19h 17mLATAM Airlines

Deal found 7/28

$613

Wed 10/229:45 amIAD - SDU

2 stops27h 35mAir Canada

Sun 10/268:30 amSDU - IAD

2 stops37h 29mAir Canada

Deal found 7/26

$633

Wed 10/225:45 amIAD - SDU

3 stops24h 55mMultiple Airlines

Sun 10/268:30 amSDU - IAD

2 stops22h 20mMultiple Airlines

Deal found 7/26

$672

Wed 9/173:20 pmIAD - SDU

2 stops30h 00mGOL

Mon 9/223:15 pmSDU - IAD

2 stops47h 45mGOL

Deal found 7/27

$692

Mon 10/66:50 pmIAD - SDU

2 stops18h 30mUnited Airlines

Sun 10/123:00 pmSDU - IAD

2 stops25h 57mUnited Airlines

Deal found 7/27

$757

Best flights from Dulles Intl to Santos Dumont
Discover carefully curated flight deals from Dulles Intl to Santos Dumont that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 28, 2025.

Tue 9/3012:35 pmIAD - SDU

2 stops21h 30mLATAM Airlines

Tue 10/75:40 pmSDU - IAD

2 stops19h 17mLATAM Airlines

Deal found 7/28

$613

Wed 10/229:45 amIAD - SDU

2 stops27h 35mAir Canada

Sun 10/268:30 amSDU - IAD

2 stops37h 29mAir Canada

Deal found 7/26

$633

Wed 10/225:45 amIAD - SDU

3 stops24h 55mMultiple Airlines

Sun 10/268:30 amSDU - IAD

2 stops22h 20mMultiple Airlines

Deal found 7/26

$672

Wed 9/173:20 pmIAD - SDU

2 stops30h 00mGOL

Mon 9/223:15 pmSDU - IAD

2 stops47h 45mGOL

Deal found 7/27

$692

Mon 10/66:50 pmIAD - SDU

2 stops18h 30mUnited Airlines

Sun 10/123:00 pmSDU - IAD

2 stops25h 57mUnited Airlines

Deal found 7/27

$757

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

Mon 7/2810:35 pmIAD - SDU

1 stop14h 45mMultiple Airlines

Wed 8/611:25 amSDU - IAD

1 stop20h 00mMultiple Airlines

Deal found 7/26

$743

Mon 7/285:20 pmIAD - SDU

2 stops19h 40mLATAM Airlines

Wed 8/63:40 pmSDU - IAD

2 stops21h 22mLATAM Airlines

Deal found 7/26

$1,047

Sun 8/35:31 pmIAD - SDU

2 stops19h 49mAir Canada

Tue 8/1211:25 amSDU - IAD

2 stops27h 17mAir Canada

Deal found 7/28

$2,352

Wed 8/612:40 pmIAD - SDU

2 stops19h 30mAzul

Mon 8/111:45 pmSDU - IAD

2 stops22h 29mAzul

Deal found 7/28

$2,760

Thu 8/712:12 pmIAD - SDU

2 stops21h 13mLATAM Airlines

Sun 8/108:20 pmSDU - IAD

2 stops16h 42mLATAM Airlines

Deal found 7/26

$1,052

Thu 8/710:35 pmIAD - SDU

1 stop14h 45mMultiple Airlines

Sun 8/103:00 pmSDU - IAD

1 stop16h 25mMultiple Airlines

Deal found 7/26

$1,061

Thu 8/710:35 pmIAD - SDU

1 stop14h 45mUnited Airlines

Sun 8/103:00 pmSDU - IAD

2 stops23h 49mUnited Airlines

Deal found 7/26

$1,149

Thu 8/1410:35 pmIAD - SDU

1 stop14h 45mUnited Airlines

Sun 8/173:00 pmSDU - IAD

1 stop16h 25mUnited Airlines

Deal found 7/25

$1,066

Thu 8/219:35 amIAD - SDU

2 stops26h 25mAzul

Mon 8/259:55 amSDU - IAD

2 stops29h 33mAzul

Deal found 7/27

$1,219

Mon 8/252:25 pmIAD - SDU

2 stops22h 55mAir Canada

Thu 9/47:55 amSDU - IAD

2 stops28h 18mAir Canada

Deal found 7/26

$957

One-way flights from Dulles Intl to Santos Dumont
Search for one-way flight options from Dulles Intl to Santos Dumont. Find affordable one-way fares based on user searches. Data last updated July 28, 2025.

Mon 9/293:31 pmIAD - SDU

2 stops27h 09mLATAM Airlines

Deal found 7/25

$333

Fri 8/295:45 amIAD - SDU

3 stops25h 55mMultiple Airlines

Deal found 7/27

$336

Tue 10/710:35 pmIAD - SDU

1 stop14h 45mUnited Airlines

Deal found 7/27

$359

Wed 10/83:20 pmIAD - SDU

2 stops18h 20mAvianca

Deal found 7/27

$430

Fri 8/112:12 pmIAD - SDU

2 stops20h 23mDelta

Deal found 7/27

$878

Cheapflights Fare Finder

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

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Tue 9/30

12:35 pm-11:05 am

2 stops21h 30m

Rio de Janeiro Santos Dumont

Tue 10/7

5:40 pm-11:57 am

2 stops19h 17m

$613

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 10/22

9:45 am-2:20 pm

2 stops27h 35m

Rio de Janeiro Santos Dumont

Sun 10/26

8:30 am-8:59 pm

2 stops37h 29m

$633

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 10/22

5:45 am-7:40 am

3 stops24h 55m

Rio de Janeiro Santos Dumont

Sun 10/26

8:30 am-5:50 am

2 stops22h 20m

$672

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 9/17

3:20 pm-10:20 pm

2 stops30h 00m

Rio de Janeiro Santos Dumont

Mon 9/22

3:15 pm-2:00 pm

2 stops47h 45m

$692

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Mon 10/6

6:50 pm-2:20 pm

2 stops18h 30m

Rio de Janeiro Santos Dumont

Sun 10/12

3:00 pm-3:57 pm

2 stops25h 57m

$757

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Mon 9/29

3:31 pm-7:40 pm

2 stops27h 09m

$333

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Fri 8/29

5:45 am-8:40 am

3 stops25h 55m

$336

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Tue 10/7

10:35 pm-2:20 pm

1 stop14h 45m

$359

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Wed 10/8

3:20 pm-10:40 am

2 stops18h 20m

$430

Washington, D.C.Rio de Janeiro

IAD - SDU

IADSDU

Washington, D.C. Dulles Intl

Fri 8/1

12:12 pm-9:35 am

2 stops20h 23m

$878

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/25

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

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from Dulles Intl 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.

Reviews of airlines servicing Santos Dumont

Read reviews from past customers who have flown Delta, LATAM Airlines, and United Airlines from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,975 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Delta

8.0

Very good

7,975 reviews

Delta

8.0

Very good

7,975 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

LATAM Airlines

7.5

Good

1,821 reviews

Delta

8.0

Very good

7,975 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

United Airlines

7.4

Good

8,892 reviews

Delta

8.0

Very good

7,975 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

GOL

7.3

Good

1,091 reviews

Delta

8.0

Very good

7,975 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Air Canada

7.1

Good

9,813 reviews

Delta

8.0

Very good

7,975 reviews

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport one-way?
One-way options have recently been found by users for as low as $333 on LATAM Airlines. Other airlines that offer cheap prices include United Airlines from $359 and Avianca from $430 one-way.
Can I find deals for flights from Dulles Intl to Santos Dumont that include hotel bookings?
Yes. In addition to deals on Dulles Intl to Santos Dumont flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Dulles Intl to Santos Dumont?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Santos Dumont.
Can I find deals for business class flights from Dulles Intl to Santos Dumont?
Yes. Cheapflights offers flight deals from Dulles Intl 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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$333+ Cheap flights from Dulles Intl (IAD) 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Santos Dumont with Cheapflights

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Find flight deals from Dulles Intl to Santos Dumont

Cheapest flights from Dulles Intl to Santos DumontExplore the most affordable flight options available from Dulles Intl to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Explore the most affordable flight options available from Dulles Intl to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.

Cheapflights Fare Finder

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

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

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

Reviews of airlines servicing Santos Dumont

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Santos Dumont. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to Rio de Janeiro Santos Dumont Airport one-way?

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

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

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

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Cheapest flights from Dulles Intl to Santos Dumont
Explore the most affordable flight options available from Dulles Intl to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 28, 2025.