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Porto Alegre

$677+ Cheap flights from Seattle (SEA) to Porto Alegre (POA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — POA
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
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 December 12, 2025.

This Ovago deal was found by Cheapflights users on 12/10. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1411:34 amSEA - POA
2 stops32h 11mGOL
Thu 12/254:30 amPOA - SEA
2 stops35h 29mGOL
Deal found 12/10$1,453
This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/188:00 amSEA - POA
2 stops28h 00mLATAM Airlines
Sat 1/37:45 amPOA - SEA
2 stops20h 40mLATAM Airlines
Deal found 12/11$2,882
This Copa Airlines deal was found by Cheapflights users on 12/11. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/205:05 pmSEA - POA
2 stops26h 25mCopa Airlines
Fri 1/21:45 amPOA - SEA
2 stops27h 12mCopa Airlines
Deal found 12/11$3,156
This Copa Airlines deal was found by Cheapflights users on 12/10. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/185:05 pmSEA - POA
2 stops26h 25mCopa Airlines
Fri 1/21:45 amPOA - SEA
2 stops27h 12mCopa Airlines
Deal found 12/10$3,157
This United Airlines deal was found by Cheapflights users on 12/10. 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 12/141:40 pmSEA - POA
2 stops47h 35mUnited Airlines
Fri 12/263:30 pmPOA - SEA
3 stops31h 36mUnited Airlines
Deal found 12/10$3,175
This Gotogate deal was found by Cheapflights users on 12/10. 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.
Sun 12/145:50 amSEA - POA
3 stops35h 55mMultiple Airlines
Fri 12/265:55 pmPOA - SEA
3 stops25h 36mMultiple Airlines
Deal found 12/10$3,251
This FlightHub deal was found by Cheapflights users on 12/11. 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.
Sat 12/208:15 amSEA - POA
2 stops27h 45mLATAM Airlines
Sat 1/36:00 pmPOA - SEA
3 stops56h 35mLATAM Airlines
Deal found 12/11$3,417
This Copa Airlines deal was found by Cheapflights users on 12/10. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/149:05 amSEA - POA
2 stops34h 25mCopa Airlines
Thu 12/251:35 amPOA - SEA
2 stops27h 22mCopa Airlines
Deal found 12/10$5,372
This Copa Airlines deal was found by Cheapflights users on 12/10. 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/137:29 pmSEA - POA
2 stops24h 01mCopa Airlines
Thu 12/251:35 amPOA - SEA
2 stops27h 22mCopa Airlines
Deal found 12/10$5,373
This business-class.com deal was found by Cheapflights users on 12/10. 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 business-class.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/146:00 amSEA - POA
3 stops37h 40mLATAM Airlines
Fri 12/265:55 pmPOA - SEA
2 stops25h 20mLATAM Airlines
Deal found 12/10$6,624
This Gotogate deal was found by Cheapflights users on 12/10. 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.
Sun 12/148:10 amSEA - POA
2 stops27h 20mAir Canada
Fri 12/265:55 pmPOA - SEA
3 stops30h 21mAir Canada
Deal found 12/10$7,014
This Air Canada deal was found by Cheapflights users on 12/10. 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 12/158:10 amSEA - POA
2 stops27h 20mAir Canada
Wed 12/243:30 pmPOA - SEA
2 stops35h 46mAir Canada
Deal found 12/10$7,064

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 December 12, 2025.

Most accurate provider

Ovago
2 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$677
(United Airlines)
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 December 12, 2025.
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

Sat 3/14

11:59 pm-2:20 pm

2 stops34h 21m

Porto Alegre Salgado Filho

Wed 3/18

5:10 pm-7:03 pm

2 stops29h 53m

$677

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Sat 2/14

7:25 am-11:35 am

2 stops23h 10m

Porto Alegre Salgado Filho

Sat 2/28

6:40 am-10:25 pm

2 stops20h 45m

$1,072

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Sat 2/14

12:42 pm-11:45 am

3 stops66h 03m

Porto Alegre Salgado Filho

Sat 2/28

4:55 pm-8:56 pm

2 stops33h 01m

$1,080

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Compare providers for flights from Seattle to Porto Alegre

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Porto Alegre in December.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*2 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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 AranGrant the most. AranGrant 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?

    United Airlines and LATAM Airlines can get you from Seattle to Porto Alegre in just under 23h 10m. Your travel time can differ by up to 11h 11m. 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.

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