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

Currently, August is the cheapest month in which you can book a flight from Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, October can be a great choice for travel to Washington, D.C. Dulles Intl Airport. Flights to Washington, D.C. Dulles Intl Airport from Rio de Janeiro Santos Dumont Airport in October are about $688 on average during October, but can be found for as low as $483.

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.

$273+ 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

Round-trip from	$649 (Trip.com)
One-way from	$273 (LATAM Airlines)
Popular in	June
Cheapest in	October
Average price	$709

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

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Highest demand for flights based on searches. 6% potential increase in price ($50 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($12 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 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 July 2, 2025.

Thu 7/318:00 amSDU - IAD

1 stop23h 25mMultiple Airlines

Sat 8/1610:35 pmIAD - SDU

1 stop18h 10mMultiple Airlines

Deal found 6/30

$649

Wed 9/247:55 amSDU - IAD

2 stops38h 10mAir Canada

Wed 10/89:35 amIAD - SDU

2 stops27h 45mAir Canada

Deal found 6/30

$661

Sun 9/213:00 pmSDU - IAD

1 stop16h 25mUnited Airlines

Thu 10/26:01 amIAD - SDU

2 stops31h 19mUnited Airlines

Deal found 7/1

$710

Sat 9/278:20 pmSDU - IAD

2 stops16h 36mLATAM Airlines

Wed 10/85:10 pmIAD - SDU

2 stops15h 25mLATAM Airlines

Deal found 7/1

$856

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 July 2, 2025.

Thu 7/318:00 amSDU - IAD

1 stop23h 25mMultiple Airlines

Sat 8/1610:35 pmIAD - SDU

1 stop18h 10mMultiple Airlines

Deal found 6/30

$649

Wed 9/247:55 amSDU - IAD

2 stops38h 10mAir Canada

Wed 10/89:35 amIAD - SDU

2 stops27h 45mAir Canada

Deal found 6/30

$661

Sun 9/213:00 pmSDU - IAD

1 stop16h 25mUnited Airlines

Thu 10/26:01 amIAD - SDU

2 stops31h 19mUnited Airlines

Deal found 7/1

$710

Sat 9/278:20 pmSDU - IAD

2 stops16h 36mLATAM Airlines

Wed 10/85:10 pmIAD - SDU

2 stops15h 25mLATAM Airlines

Deal found 7/1

$856

Last-minute flights from Santos Dumont to Dulles Intl
Discover last-minute flight deals from Santos Dumont to Dulles Intl. Data last updated July 2, 2025 and is based on user searches.

Wed 7/21:00 pmSDU - IAD

2 stops35h 58mUnited Airlines

Mon 7/78:30 amIAD - SDU

2 stops28h 50mUnited Airlines

Deal found 6/30

$941

Thu 7/37:45 amSDU - IAD

2 stops28h 29mAzul

Tue 7/1512:40 pmIAD - SDU

2 stops23h 20mAzul

Deal found 7/1

$1,854

Thu 7/318:00 amSDU - IAD

1 stop23h 25mMultiple Airlines

Sat 8/1610:35 pmIAD - SDU

1 stop18h 10mMultiple Airlines

Deal found 6/30

$649

Sat 8/98:20 pmSDU - IAD

2 stops16h 30mLATAM Airlines

Mon 8/1812:13 pmIAD - SDU

2 stops20h 22mLATAM Airlines

Deal found 7/1

$1,026

Sun 8/108:20 pmSDU - IAD

2 stops19h 11mDelta

Tue 8/193:26 pmIAD - SDU

2 stops17h 09mDelta

Deal found 7/1

$3,478

Wed 8/137:55 amSDU - IAD

2 stops38h 06mAir Canada

Wed 8/209:35 amIAD - SDU

2 stops27h 45mAir Canada

Deal found 6/30

$996

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 July 2, 2025.

Tue 7/298:20 pmSDU - IAD

2 stops19h 22mLATAM Airlines

Deal found 7/2

$273

Wed 8/1311:25 amSDU - IAD

1 stop20h 00mMultiple Airlines

Deal found 7/1

$333

Sun 10/263:00 pmSDU - IAD

2 stops33h 59mUnited Airlines

Deal found 6/29

$337

Sun 10/126:10 amSDU - IAD

2 stops32h 50mGOL

Deal found 7/1

$339

Tue 7/298:20 pmSDU - IAD

2 stops16h 42mDelta

Deal found 7/1

$465

Mon 9/157:55 amSDU - IAD

2 stops28h 18mAir Canada

Deal found 7/1

$577

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

Thu 7/31

8:00 am-6:25 am

1 stop23h 25m

Washington, D.C. Dulles Intl

Sat 8/16

10:35 pm-5:45 pm

1 stop18h 10m

$649

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Wed 9/24

7:55 am-9:05 pm

2 stops38h 10m

Washington, D.C. Dulles Intl

Wed 10/8

9:35 am-2:20 pm

2 stops27h 45m

$661

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sun 9/21

3:00 pm-6:25 am

1 stop16h 25m

Washington, D.C. Dulles Intl

Thu 10/2

6:01 am-2:20 pm

2 stops31h 19m

$710

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sat 9/27

8:20 pm-11:56 am

2 stops16h 36m

Washington, D.C. Dulles Intl

Wed 10/8

5:10 pm-9:35 am

2 stops15h 25m

$856

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Tue 7/29

8:20 pm-2:42 pm

2 stops19h 22m

$273

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Wed 8/13

11:25 am-6:25 am

1 stop20h 00m

$333

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sun 10/26

3:00 pm-11:59 pm

2 stops33h 59m

$337

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Sun 10/12

6:10 am-2:00 pm

2 stops32h 50m

$339

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Tue 7/29

8:20 pm-12:02 pm

2 stops16h 42m

$465

Rio de JaneiroWashington, D.C.

SDU - IAD

SDUIAD

Rio de Janeiro Santos Dumont

Mon 9/15

7:55 am-11:13 am

2 stops28h 18m

$577

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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.

Reviews of airlines servicing Dulles Intl

See what other customers who have flown with Delta, LATAM Airlines, and United Airlines from Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

7,983 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

7,983 reviews

Delta

8.0

Very good

7,983 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

1,805 reviews

Delta

8.0

Very good

7,983 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

8,861 reviews

Delta

8.0

Very good

7,983 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

1,082 reviews

Delta

8.0

Very good

7,983 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

9,669 reviews

Delta

8.0

Very good

7,983 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 Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport one-way?
$273 is the cheapest one-way deal found within the past few days, from LATAM Airlines. You may also be able to find cheap deals on United Airlines and GOL, with prices starting from $337 and $339, respectively.
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.
What is the cheapest month to book a flight from Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport?
Currently, August is the cheapest month in which you can book a flight from Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Rio de Janeiro Santos Dumont Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $345). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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$273+ 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 7/29. 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

Round-trip from

One-way from

Popular in

Cheapest in

Average price

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 July 2, 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 July 2, 2025.

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.

Reviews of airlines servicing Dulles Intl

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.

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

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?

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

Traveling to a place near Rio de Janeiro Santos Dumont Airport?

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Alternative routes for Santos Dumont to Dulles Intl

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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 July 2, 2025.