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Porto Alegre

$350+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — POA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find 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 October 30, 2025.

This CVC Viagens 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 CVC Viagens is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:45 pmSEA - POA
2 stops47h 15mLATAM Airlines
Mon 2/237:45 amPOA - SEA
2 stops43h 27mLATAM Airlines
Deal found 10/29$1,019
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 12/35:50 amSEA - POA
3 stops31h 35mAir Canada
Mon 2/235:10 pmPOA - SEA
3 stops26h 21mAir Canada
Deal found 10/29$1,202
This KAYAK deal was found by Cheapflights users on 10/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/218:00 amSEA - POA
2 stops28h 00mLATAM Airlines
Fri 11/286:00 pmPOA - SEA
2 stops31h 50mLATAM Airlines
Deal found 10/30$1,321
This Travelocity 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/310:30 amSEA - POA
2 stops25h 00mGOL
Fri 12/266:25 pmPOA - SEA
2 stops21h 34mGOL
Deal found 10/29$1,418
This FlightHub 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/186:00 amSEA - POA
2 stops24h 35mLATAM Airlines
Sat 1/312:30 pmPOA - SEA
2 stops28h 51mLATAM Airlines
Deal found 10/29$1,514
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/38:40 amSEA - POA
3 stops28h 45mUnited Airlines
Fri 12/266:15 pmPOA - SEA
2 stops22h 48mUnited Airlines
Deal found 10/29$1,749
This Copa Airlines 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 Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:36 pmSEA - POA
2 stops30h 54mCopa Airlines
Sun 2/221:30 amPOA - SEA
2 stops25h 43mCopa Airlines
Deal found 10/29$1,778
This KAYAK deal was found by Cheapflights users on 10/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/216:15 amSEA - POA
2 stops29h 45mLATAM Airlines
Thu 1/87:45 amPOA - SEA
2 stops20h 37mLATAM Airlines
Deal found 10/30$1,975
This Trip.com deal was found by Cheapflights users on 10/30. 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.
Fri 12/197:48 pmSEA - POA
3 stops46h 57mMultiple Airlines
Mon 1/55:10 amPOA - SEA
3 stops36h 57mMultiple Airlines
Deal found 10/30$2,026
This KAYAK deal was found by Cheapflights users on 10/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/218:45 amSEA - POA
2 stops27h 15mLATAM Airlines
Wed 1/76:00 pmPOA - SEA
2 stops27h 59mLATAM Airlines
Deal found 10/30$2,107

Cheap 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 October 30, 2025.

Most accurate provider

AranGrant
2 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,019
(CVC Viagens)

One-way from

$350
(Kiwi.com)
Provider with most accurate pricing for Seattle/Tacoma Intl-Porto Alegre Salgado Filho flight deals.
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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
One-way flight from Seattle/Tacoma Intl to Porto Alegre Salgado Filho
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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 October 30, 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

Wed 12/3

12:45 pm-5:00 pm

2 stops47h 15m

Porto Alegre Salgado Filho

Mon 2/23

7:45 am-10:12 pm

2 stops43h 27m

$1,019

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 3/24

7:20 am-5:00 pm

2 stops29h 40m

Porto Alegre Salgado Filho

Thu 3/26

8:10 pm-10:05 pm

2 stops29h 55m

$1,091

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Wed 12/3

5:50 am-6:25 pm

3 stops31h 35m

Porto Alegre Salgado Filho

Mon 2/23

5:10 pm-2:31 pm

3 stops26h 21m

$1,202

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Fri 11/21

8:00 am-5:00 pm

2 stops28h 00m

Porto Alegre Salgado Filho

Fri 11/28

6:00 pm-8:50 pm

2 stops31h 50m

$1,321

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 3/24

7:15 am-2:35 pm

3 stops27h 20m

Porto Alegre Salgado Filho

Thu 3/26

3:25 pm-6:58 pm

2 stops31h 33m

$1,438

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 12/18

6:00 am-11:35 am

2 stops24h 35m

Porto Alegre Salgado Filho

Sat 1/3

12:30 pm-12:21 pm

2 stops28h 51m

$1,514

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Wed 12/3

8:40 am-6:25 pm

3 stops28h 45m

Porto Alegre Salgado Filho

Fri 12/26

6:15 pm-12:03 pm

2 stops22h 48m

$1,749

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Wed 12/3

12:36 pm-12:30 am

2 stops30h 54m

Porto Alegre Salgado Filho

Sun 2/22

1:30 am-10:13 pm

2 stops25h 43m

$1,778

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Wed 12/3

11:41 am-12:30 am

3 stops31h 49m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

  • Most accurate provider: When it comes to deals on Seattle-Porto Alegre flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Porto Alegre flight deals on Cheapflights vs. AranGrant 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?

    LATAM Airlines and Air Canada can get you from Seattle to Porto Alegre in just under 31h 35m. Your travel time can differ by up to 15h 40m. 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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