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Santos Dumont

$374+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SDU
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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Find 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 October 29, 2025.

This Trip.com deal was found by Cheapflights users on 10/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/48:45 amSEA - SDU
2 stops24h 25mMultiple Airlines
Wed 12/176:00 amSDU - SEA
2 stops21h 30mMultiple Airlines
Deal found 10/28$1,057
This Mytrip deal was found by Cheapflights users on 10/29. 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 12/38:00 pmSEA - SDU
3 stops33h 45mMultiple Airlines
Fri 12/121:45 pmSDU - SEA
2 stops37h 31mMultiple Airlines
Deal found 10/29$1,263
This Booking.com deal was found by Cheapflights users on 10/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:10 amSEA - SDU
2 stops27h 30mAir Canada
Fri 12/121:45 pmSDU - SEA
2 stops37h 31mAir Canada
Deal found 10/29$1,316
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Fri 10/318:00 pmSEA - SDU
3 stops34h 45mMultiple Airlines
Sun 11/22:50 pmSDU - SEA
2 stops36h 26mMultiple Airlines
Deal found 10/28$1,333
This United Airlines deal was found by Cheapflights users on 10/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2712:39 pmSEA - SDU
2 stops23h 01mUnited Airlines
Sun 12/72:50 pmSDU - SEA
2 stops25h 55mUnited Airlines
Deal found 10/28$1,363
This Booking.com deal was found by Cheapflights users on 10/26. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/98:10 amSEA - SDU
2 stops27h 30mAir Canada
Tue 12/1611:20 amSDU - SEA
2 stops39h 56mAir Canada
Deal found 10/26$1,416
This Gotogate deal was found by Cheapflights users on 10/28. 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.
Thu 12/48:10 amSEA - SDU
2 stops27h 25mAir Canada
Wed 12/1711:20 amSDU - SEA
2 stops39h 56mAir Canada
Deal found 10/28$1,444
This Air Canada deal was found by Cheapflights users on 10/27. 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.
Fri 11/218:10 amSEA - SDU
2 stops31h 05mAir Canada
Wed 12/31:45 pmSDU - SEA
2 stops37h 31mAir Canada
Deal found 10/27$1,491

Cheap 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 October 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
1 star

Round-trip from

$796
(FlightHub)

One-way from

$374
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$1,386
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. 3% potential increase in price ($47 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($34 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 29, 2025.
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

Thu 12/4

8:45 am-2:10 pm

2 stops24h 25m

Rio de Janeiro Santos Dumont

Wed 12/17

6:00 am-10:30 pm

2 stops21h 30m

$1,057

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Mon 1/12

8:10 am-2:10 pm

2 stops25h 00m

Rio de Janeiro Santos Dumont

Mon 1/26

11:20 am-10:16 pm

2 stops39h 56m

$1,166

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Wed 12/3

8:00 pm-10:45 am

3 stops33h 45m

Rio de Janeiro Santos Dumont

Fri 12/12

1:45 pm-10:16 pm

2 stops37h 31m

$1,263

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Wed 12/3

8:10 am-4:40 pm

2 stops27h 30m

Rio de Janeiro Santos Dumont

Fri 12/12

1:45 pm-10:16 pm

2 stops37h 31m

$1,316

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Thu 11/27

12:39 pm-4:40 pm

2 stops23h 01m

Rio de Janeiro Santos Dumont

Sun 12/7

2:50 pm-11:45 am

2 stops25h 55m

$1,363

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Tue 12/9

8:10 am-4:40 pm

2 stops27h 30m

Rio de Janeiro Santos Dumont

Tue 12/16

11:20 am-10:16 pm

2 stops39h 56m

$1,416

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Thu 12/4

8:10 am-4:35 pm

2 stops27h 25m

Rio de Janeiro Santos Dumont

Wed 12/17

11:20 am-10:16 pm

2 stops39h 56m

$1,444

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Sun 12/28

10:06 pm-8:55 am

2 stops29h 49m

Rio de Janeiro Santos Dumont

Fri 1/9

6:00 am-11:42 pm

2 stops22h 42m

$1,745

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Wed 12/24

12:43 pm-4:55 pm

2 stops47h 12m

Rio de Janeiro Santos Dumont

Thu 1/8

8:25 pm-11:42 pm

2 stops32h 17m

$1,756

SeattleRio de Janeiro

SEA - SDU

SEASDU

Seattle/Tacoma Intl

Wed 12/31

8:16 am-10:45 am

2 stops21h 29m

$374

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 17 results
1
2
  • 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 23h 01m. Air Canada provides one of the quickest options available for as low as $1,363. Airlines will cover a distance of 6888 mi. This flight may include one or multiple stops.

  • 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

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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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