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Porto Alegre

$347+ Cheap flights from Seattle (SEA) to Porto Alegre (POA)

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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — POA
Mar 22 — Mar 291
Sun 3/22
Sun 3/29
1 adult, Economy
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Cheap flight deals from Seattle to Porto Alegre

Cheapest flights from Seattle to Porto Alegre
Explore the most affordable flight options available from Seattle to Porto Alegre. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2026.

This Travelocity deal was found by Cheapflights users on 2/17. 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.
Mon 5/187:15 am
SEA
-
POA
2 stops31h 00m
LATAM Airlines
Fri 5/229:55 pm
POA
-
SEA
2 stops52h 10m
LATAM Airlines
Deal found 2/17$864
This United Airlines deal was found by Cheapflights users on 2/15. 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 4/211:59 pm
SEA
-
POA
2 stops34h 36m
United Airlines
Thu 4/94:05 pm
POA
-
SEA
2 stops30h 55m
United Airlines
Deal found 2/15$1,233
This Air Canada deal was found by Cheapflights users on 2/15. 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.
Tue 3/178:00 am
SEA
-
POA
2 stops26h 25m
Air Canada
Thu 3/193:30 pm
POA
-
SEA
2 stops34h 46m
Air Canada
Deal found 2/15$1,273
This United Airlines deal was found by Cheapflights users on 2/18. 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.
Sun 4/510:35 pm
SEA
-
POA
2 stops35h 15m
United Airlines
Sun 4/124:05 pm
POA
-
SEA
2 stops31h 37m
United Airlines
Deal found 2/18$1,565
This United Airlines deal was found by Cheapflights users on 2/18. 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.
Tue 3/178:59 am
SEA
-
POA
3 stops25h 26m
United Airlines
Thu 3/193:30 pm
POA
-
SEA
2 stops33h 26m
United Airlines
Deal found 2/18$1,680
This Mytrip deal was found by Cheapflights users on 2/17. 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.
Mon 5/189:55 am
SEA
-
POA
3 stops24h 10m
Air Canada
Fri 5/225:10 pm
POA
-
SEA
3 stops25h 10m
Air Canada
Deal found 2/17$2,062
This AranGrant deal was found by Cheapflights users on 2/18. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/13:31 pm
SEA
-
POA
2 stops28h 44m
Copa Airlines
Wed 7/81:15 am
POA
-
SEA
2 stops27h 29m
Copa Airlines
Deal found 2/18$4,320

Find flight deals from Seattle to Porto Alegre

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Porto Alegre (POA). 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 February 20, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$864
(Travelocity)
Provider with most accurate pricing for Seattle/Tacoma Intl-Porto Alegre Salgado Filho flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Porto Alegre Salgado Filho flights.
Search Deals
From Seattle/Tacoma Intl to Porto Alegre Salgado Filho
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Porto Alegre 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 February 20, 2026.
Use the filters below to find and compare flights from Seattle to Porto Alegre that are best for you.

Fly from

Seattle

Fly to

Porto Alegre

Route

Depart

Return

Price

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Mon 5/18

7:15 am-6:15 pm

2 stops31h 00m

Porto Alegre Salgado Filho

Fri 5/22

9:55 pm-10:05 pm

2 stops52h 10m

$864

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 3/17

8:00 am-2:25 pm

2 stops26h 25m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-10:16 pm

2 stops34h 46m

$1,273

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 4/2

6:20 am-1:45 pm

3 stops27h 25m

Porto Alegre Salgado Filho

Thu 4/9

4:05 pm-7:00 pm

2 stops30h 55m

$1,523

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Sun 4/5

10:35 pm-1:50 pm

2 stops35h 15m

Porto Alegre Salgado Filho

Sun 4/12

4:05 pm-7:42 pm

2 stops31h 37m

$1,565

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 3/17

8:59 am-4:25 pm

3 stops27h 26m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-8:56 pm

2 stops33h 26m

$1,680

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Mon 3/16

6:24 pm-12:45 am

3 stops26h 21m

$374

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 3/19

6:24 pm-6:40 pm

3 stops44h 16m

$413

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Wed 3/18

7:55 am-9:55 am

2 stops22h 00m

$545

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 5/5

8:00 am-2:20 pm

2 stops26h 20m

$584

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Fri 3/20

6:15 am-6:30 am

2 stops20h 15m

$858

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

  • Most accurate provider: When it comes to deals on Seattle-Porto Alegre flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Seattle-Porto Alegre flight deals on Cheapflights vs. Ovago 90-95% of the time. Price accuracy is based on data collected from Seattle-Porto Alegre flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Porto Alegre flights, Cheapflights users trust Ovago the most. Ovago 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-Porto Alegre 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 Porto Alegre

Have a flexible travel schedule? Discover the best time to fly to Porto Alegre 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 Porto Alegre. 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 Seattle to Porto Alegre?

    LATAM Airlines and Air Canada can get you from Seattle to Porto Alegre in just under 26h 25m. Your travel time can differ by up to 4h 35m. Seattle and Porto Alegre are separated by a distance of 6926 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Seattle to Porto Alegre that include hotel bookings?

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

  • How can I find direct flights from Seattle to Porto Alegre?

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

  • Can I find deals for business class flights from Seattle to Porto Alegre?

    Yes. Cheapflights offers flight deals from Seattle to Porto Alegre 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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Portland to Porto Alegre flights

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