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Santos Dumont

$394+ Cheap flights from Seattle (SEA) 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 3/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDU
Feb 26 — Mar 51
Thu 2/26
Thu 3/5
1 adult, Economy
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Cheap flight deals from Seattle to Santos Dumont

Cheapest flights from Seattle to Santos Dumont
Explore the most affordable flight options available from Seattle to Santos Dumont. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 27, 2026.

This Mytrip deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:00 am
SEA
-
SDU
2 stops28h 45m
Multiple Airlines
Mon 4/271:45 pm
SDU
-
SEA
2 stops36h 06m
Multiple Airlines
Deal found 1/26$785
This Mytrip deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/228:00 am
SEA
-
SDU
2 stops28h 45m
Multiple Airlines
Tue 4/281:45 pm
SDU
-
SEA
2 stops36h 06m
Multiple Airlines
Deal found 1/27$789
This Air Canada deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:00 am
SEA
-
SDU
2 stops28h 45m
Air Canada
Mon 4/271:45 pm
SDU
-
SEA
2 stops36h 06m
Air Canada
Deal found 1/27$813
This FlightHub deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/198:00 am
SEA
-
SDU
2 stops28h 45m
Multiple Airlines
Sun 4/2612:40 pm
SDU
-
SEA
2 stops37h 11m
Multiple Airlines
Deal found 1/27$818
This FlightHub deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:00 am
SEA
-
SDU
2 stops46h 15m
Multiple Airlines
Sun 4/2610:05 am
SDU
-
SEA
2 stops39h 46m
Multiple Airlines
Deal found 1/27$840
This Air Canada deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/238:00 am
SEA
-
SDU
2 stops27h 45m
Air Canada
Wed 3/41:50 pm
SDU
-
SEA
2 stops37h 26m
Air Canada
Deal found 1/26$902
This Air Canada deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/158:00 am
SEA
-
SDU
2 stops28h 45m
Air Canada
Wed 4/221:45 pm
SDU
-
SEA
2 stops36h 06m
Air Canada
Deal found 1/27$913
This Delta deal was found by Cheapflights users on 1/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/168:50 am
SEA
-
SDU
2 stops24h 25m
Delta
Thu 3/268:05 pm
SDU
-
SEA
2 stops27h 43m
Delta
Deal found 1/24$921
This Expedia deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/268:00 am
SEA
-
SDU
2 stops27h 45m
Multiple Airlines
Tue 3/38:05 pm
SDU
-
SEA
2 stops23h 39m
Multiple Airlines
Deal found 1/26$927
This Travelocity deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:00 am
SEA
-
SDU
2 stops27h 45m
Multiple Airlines
Wed 3/42:00 pm
SDU
-
SEA
2 stops37h 15m
Multiple Airlines
Deal found 1/27$932
This FlightHub deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/178:00 am
SEA
-
SDU
2 stops46h 15m
Multiple Airlines
Fri 4/241:45 pm
SDU
-
SEA
2 stops36h 06m
Multiple Airlines
Deal found 1/27$935
This Gotogate deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/118:10 am
SEA
-
SDU
2 stops28h 35m
Multiple Airlines
Wed 3/181:50 pm
SDU
-
SEA
2 stops36h 26m
Multiple Airlines
Deal found 1/25$974

Find flight deals from Seattle to Santos Dumont

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Santos Dumont (SDU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 27, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$785
(Mytrip)

One-way from

$394
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$1,423
Provider with most accurate pricing for Seattle/Tacoma Intl-Rio de Janeiro Santos Dumont flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Rio de Janeiro Santos Dumont flights.
Search Deals
From Seattle/Tacoma Intl to Rio de Janeiro Santos Dumont
Search Deals
One-way flight from Seattle/Tacoma Intl to Rio de Janeiro Santos Dumont
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($123 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Santos Dumont that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 27, 2026.
Use the filters below to find and compare flights from Seattle to Rio de Janeiro Santos Dumont Airport that are best for you.

Fly from

Seattle

Fly to

Santos Dumont

Route

Depart

Return

Price

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Wed 4/22

8:00 am-4:45 pm

2 stops28h 45m

Rio de Janeiro Santos Dumont

Tue 4/28

1:45 pm-9:51 pm

2 stops36h 06m

$789

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Mon 4/20

8:00 am-4:45 pm

2 stops28h 45m

Rio de Janeiro Santos Dumont

Mon 4/27

1:45 pm-9:51 pm

2 stops36h 06m

$813

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Tue 4/21

8:00 am-4:45 pm

2 stops28h 45m

Rio de Janeiro Santos Dumont

Tue 4/28

1:45 pm-9:51 pm

2 stops36h 06m

$813

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Wed 2/25

8:00 am-4:45 pm

2 stops27h 45m

Rio de Janeiro Santos Dumont

Tue 3/3

1:50 pm-10:16 pm

2 stops37h 26m

$902

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Fri 2/27

8:00 am-8:15 pm

2 stops31h 15m

Rio de Janeiro Santos Dumont

Tue 3/3

1:50 pm-10:16 pm

2 stops37h 26m

$902

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Wed 4/15

8:00 am-4:45 pm

2 stops28h 45m

Rio de Janeiro Santos Dumont

Wed 4/22

1:45 pm-9:51 pm

2 stops36h 06m

$913

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Mon 3/16

8:50 am-1:15 pm

2 stops24h 25m

Rio de Janeiro Santos Dumont

Thu 3/26

8:05 pm-7:48 pm

2 stops27h 43m

$921

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Wed 2/25

8:00 am-4:45 pm

2 stops27h 45m

Rio de Janeiro Santos Dumont

Sun 3/8

8:05 pm-9:48 pm

2 stops29h 43m

$932

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Fri 4/17

8:00 am-10:15 am

2 stops46h 15m

Rio de Janeiro Santos Dumont

Fri 4/24

1:45 pm-9:51 pm

2 stops36h 06m

$935

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Tue 2/24

8:00 am-4:45 pm

2 stops27h 45m

Rio de Janeiro Santos Dumont

Mon 3/2

1:50 pm-10:16 pm

2 stops37h 26m

$1,002

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/24

Showing 1-10 of 21 results
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  • Most accurate provider: When it comes to deals on Seattle-Rio de Janeiro Santos Dumont Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Rio de Janeiro Santos Dumont Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Rio de Janeiro Santos Dumont Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Rio de Janeiro Santos Dumont Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Rio de Janeiro Santos Dumont Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Santos Dumont

Have a flexible travel schedule? Discover the best time to fly to Santos Dumont from Seattle 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

Find useful and relevant information for your journey from Seattle 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 airport do you fly from for flights from Seattle to Rio de Janeiro Santos Dumont?

    If you book a flight to Rio de Janeiro Santos Dumont from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle. There are 0 flights from Seattle/Tacoma Intl to Rio de Janeiro Santos Dumont per day from 0 different airlines.

  • How long is the flight from Seattle to Rio de Janeiro Santos Dumont Airport?

    A quick flight from Seattle to Rio de Janeiro Santos Dumont Airport can take about 28h 45m. Air Canada provides one of the quickest options available for as low as $813. Airlines will cover a distance of 6888 mi.

  • Can I find deals for flights from Seattle to Santos Dumont that include hotel bookings?

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

  • How can I find direct flights from Seattle to Santos Dumont?

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

  • Can I find deals for business class flights from Seattle to Santos Dumont?

    Yes. Cheapflights offers flight deals from Seattle 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Seattle to Santos Dumont

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Rio de Janeiro–Galeão Intl flights
Portland to Rio de Janeiro–Galeão Intl flights
Portland to Santos Dumont flights

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