$447+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — POA
Mar 15 — Mar 221
1 adult, Economy
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Find cheap flights from Seattle to Porto Alegre with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Porto Alegre
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to Porto AlegreExplore 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 13, 2026.
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 13, 2026.
This KAYAK deal was found by Cheapflights users on 2/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/91:45 pm
SEA
- POA
2 stops20h 20m
Multiple Airlines
Tue 4/143:45 pm
POA
- SEA
2 stops22h 15m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$840
This United Airlines deal was found by Cheapflights users on 2/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:00 am
SEA
- POA
2 stops27h 50m
United Airlines
Tue 4/285:10 pm
POA
- SEA
2 stops29h 50m
United Airlines
Deal found 2/11![United Airlines logo]()
$843
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Wed 3/256:45 am
SEA
- POA
2 stops31h 45m
United Airlines
Wed 4/15:10 pm
POA
- SEA
2 stops35h 09m
United Airlines
Deal found 2/10![United Airlines logo]()
$856
This Orbitz deal was found by Cheapflights users on 2/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/91:45 pm
SEA
- POA
2 stops20h 20m
LATAM Airlines
Mon 4/137:25 am
POA
- SEA
2 stops41h 40m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$868
This Cheapflightsfares deal was found by Cheapflights users on 2/11. 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.
Tue 3/101:45 pm
SEA
- POA
2 stops23h 35m
LATAM Airlines
Tue 4/1410:00 am
POA
- SEA
2 stops32h 42m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$880
This Orbitz deal was found by Cheapflights users on 2/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/210:25 pm
SEA
- POA
2 stops38h 35m
LATAM Airlines
Mon 4/137:25 am
POA
- SEA
2 stops41h 40m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$883
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2510:40 pm
SEA
- POA
2 stops34h 25m
Multiple Airlines
Tue 3/316:05 pm
POA
- SEA
2 stops55h 43m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$903
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2510:20 pm
SEA
- POA
2 stops34h 45m
LATAM Airlines
Tue 3/316:05 pm
POA
- SEA
2 stops55h 43m
LATAM Airlines
Deal found 2/10![LATAM Airlines logo]()
$908
This Gurufare deal was found by Cheapflights users on 2/11. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/911:45 am
SEA
- POA
2 stops22h 20m
Multiple Airlines
Mon 4/135:10 pm
POA
- SEA
2 stops20h 50m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$915
This FlightHub deal was found by Cheapflights users on 2/11. 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.
Mon 3/91:45 pm
SEA
- POA
2 stops20h 20m
LATAM Airlines
Tue 4/143:00 pm
POA
- SEA
2 stops27h 42m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$940
This Expedia deal was found by Cheapflights users on 2/12. 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.
Sun 3/296:15 am
SEA
- POA
2 stops34h 45m
LATAM Airlines
Sun 4/57:05 pm
POA
- SEA
2 stops30h 43m
LATAM Airlines
Deal found 2/12![LATAM Airlines logo]()
$943
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:45 am
SEA
- POA
2 stops20h 15m
GOL
Wed 4/15:10 pm
POA
- SEA
2 stops34h 30m
GOL
Deal found 2/10![GOL logo]()
$992
Best flights from Seattle to Porto AlegreDiscover carefully curated flight deals from Seattle to Porto Alegre that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
Discover carefully curated flight deals from Seattle to Porto Alegre that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 13, 2026.
This United Airlines deal was found by Cheapflights users on 2/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:00 am
SEA
- POA
2 stops27h 50m
United Airlines
Tue 4/285:10 pm
POA
- SEA
2 stops29h 50m
United Airlines
Deal found 2/11![United Airlines logo]()
$843
This Cheapflightsfares deal was found by Cheapflights users on 2/11. 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.
Tue 3/101:45 pm
SEA
- POA
2 stops23h 35m
LATAM Airlines
Tue 4/1410:00 am
POA
- SEA
2 stops32h 42m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$880
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2510:40 pm
SEA
- POA
2 stops34h 25m
Multiple Airlines
Tue 3/316:05 pm
POA
- SEA
2 stops55h 43m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$903
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:45 am
SEA
- POA
2 stops20h 15m
GOL
Wed 4/15:10 pm
POA
- SEA
2 stops34h 30m
GOL
Deal found 2/10![GOL logo]()
$992
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Wed 3/256:45 am
SEA
- POA
2 stops31h 45m
United Airlines
Wed 4/15:10 pm
POA
- SEA
2 stops35h 09m
United Airlines
Deal found 2/10![United Airlines logo]()
$856
This Orbitz deal was found by Cheapflights users on 2/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/210:25 pm
SEA
- POA
2 stops38h 35m
LATAM Airlines
Mon 4/137:25 am
POA
- SEA
2 stops41h 40m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$883
This Gurufare deal was found by Cheapflights users on 2/11. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/911:45 am
SEA
- POA
2 stops22h 20m
Multiple Airlines
Mon 4/135:10 pm
POA
- SEA
2 stops20h 50m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$915
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2510:20 pm
SEA
- POA
2 stops34h 45m
LATAM Airlines
Tue 3/316:05 pm
POA
- SEA
2 stops55h 43m
LATAM Airlines
Deal found 2/10![LATAM Airlines logo]()
$908
This FlightHub deal was found by Cheapflights users on 2/11. 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.
Mon 3/91:45 pm
SEA
- POA
2 stops20h 20m
LATAM Airlines
Tue 4/143:00 pm
POA
- SEA
2 stops27h 42m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$940
This Expedia deal was found by Cheapflights users on 2/12. 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.
Sun 3/296:15 am
SEA
- POA
2 stops34h 45m
LATAM Airlines
Sun 4/57:05 pm
POA
- SEA
2 stops30h 43m
LATAM Airlines
Deal found 2/12![LATAM Airlines logo]()
$943
Last-minute flights from Seattle to Porto AlegreDiscover last-minute flight deals from Seattle to Porto Alegre. Data last updated February 13, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Porto Alegre. Data last updated February 13, 2026 and is based on user searches.
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2510:40 pm
SEA
- POA
2 stops34h 25m
Multiple Airlines
Tue 3/316:05 pm
POA
- SEA
2 stops55h 43m
Multiple Airlines
Deal found 2/10![Multiple Airlines logo]()
$903
This Orbitz deal was found by Cheapflights users on 2/10. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2510:20 pm
SEA
- POA
2 stops34h 45m
LATAM Airlines
Tue 3/316:05 pm
POA
- SEA
2 stops55h 43m
LATAM Airlines
Deal found 2/10![LATAM Airlines logo]()
$908
This KAYAK deal was found by Cheapflights users on 2/10. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:45 am
SEA
- POA
2 stops20h 15m
GOL
Wed 4/15:10 pm
POA
- SEA
2 stops34h 30m
GOL
Deal found 2/10![GOL logo]()
$992
This KAYAK deal was found by Cheapflights users on 2/11. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/91:45 pm
SEA
- POA
2 stops20h 20m
Multiple Airlines
Tue 4/143:45 pm
POA
- SEA
2 stops22h 15m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$840
This Orbitz deal was found by Cheapflights users on 2/11. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/91:45 pm
SEA
- POA
2 stops20h 20m
LATAM Airlines
Mon 4/137:25 am
POA
- SEA
2 stops41h 40m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$868
This Gurufare deal was found by Cheapflights users on 2/11. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/911:45 am
SEA
- POA
2 stops22h 20m
Multiple Airlines
Mon 4/135:10 pm
POA
- SEA
2 stops20h 50m
Multiple Airlines
Deal found 2/11![Multiple Airlines logo]()
$915
This FlightHub deal was found by Cheapflights users on 2/11. 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.
Mon 3/91:45 pm
SEA
- POA
2 stops20h 20m
LATAM Airlines
Tue 4/143:00 pm
POA
- SEA
2 stops27h 42m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$940
This Cheapflightsfares deal was found by Cheapflights users on 2/11. 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.
Tue 3/101:45 pm
SEA
- POA
2 stops23h 35m
LATAM Airlines
Tue 4/1410:00 am
POA
- SEA
2 stops32h 42m
LATAM Airlines
Deal found 2/11![LATAM Airlines logo]()
$880
This United Airlines deal was found by Cheapflights users on 2/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/257:00 am
SEA
- POA
2 stops27h 50m
United Airlines
Tue 4/285:10 pm
POA
- SEA
2 stops29h 50m
United Airlines
Deal found 2/11![United Airlines logo]()
$843
This United Airlines deal was found by Cheapflights users on 2/10. 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.
Wed 3/256:45 am
SEA
- POA
2 stops31h 45m
United Airlines
Wed 4/15:10 pm
POA
- SEA
2 stops35h 09m
United Airlines
Deal found 2/10![United Airlines logo]()
$856
This Expedia deal was found by Cheapflights users on 2/12. 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.
Sun 3/296:15 am
SEA
- POA
2 stops34h 45m
LATAM Airlines
Sun 4/57:05 pm
POA
- SEA
2 stops30h 43m
LATAM Airlines
Deal found 2/12![LATAM Airlines logo]()
$943
One-way flights from Seattle to Porto AlegreSearch for one-way flight options from Seattle to Porto Alegre. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
Search for one-way flight options from Seattle to Porto Alegre. Find affordable one-way fares based on user searches. Data last updated February 13, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/19:25 am
SEA
- POA
3 stops44h 15m
Multiple Airlines
Deal found 2/9![Multiple Airlines logo]()
$447
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 13, 2026.
Most accurate provider | Ovago 2 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $840 (KAYAK) |
One-way from | $447 (Kiwi.com) |
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 13, 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
Wed 3/25
7:00 am-2:50 pm
2 stops27h 50m
Porto Alegre Salgado Filho
Tue 4/28
5:10 pm-7:00 pm
2 stops29h 50m
$843
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Wed 3/25
6:45 am-6:30 pm
2 stops31h 45m
Porto Alegre Salgado Filho
Wed 4/1
5:10 pm-12:19 am
2 stops35h 09m
$856
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Tue 3/10
1:45 pm-5:20 pm
2 stops23h 35m
Porto Alegre Salgado Filho
Tue 4/14
10:00 am-2:42 pm
2 stops32h 42m
$880
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Thu 4/2
10:25 pm-5:00 pm
2 stops38h 35m
Porto Alegre Salgado Filho
Mon 4/13
7:25 am-9:05 pm
2 stops41h 40m
$883
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Wed 2/25
10:40 pm-2:05 pm
2 stops34h 25m
Porto Alegre Salgado Filho
Tue 3/31
6:05 pm-9:48 pm
2 stops55h 43m
$903
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Wed 2/25
10:20 pm-2:05 pm
2 stops34h 45m
Porto Alegre Salgado Filho
Tue 3/31
6:05 pm-9:48 pm
2 stops55h 43m
$908
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Mon 3/9
11:45 am-2:05 pm
2 stops22h 20m
Porto Alegre Salgado Filho
Mon 4/13
5:10 pm-10:00 am
2 stops20h 50m
$915
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Mon 3/9
1:45 pm-2:05 pm
2 stops20h 20m
Porto Alegre Salgado Filho
Tue 4/14
3:00 pm-2:42 pm
2 stops27h 42m
$940
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Sun 3/29
6:15 am-9:00 pm
2 stops34h 45m
Porto Alegre Salgado Filho
Sun 4/5
7:05 pm-9:48 pm
2 stops30h 43m
$943
SeattlePorto Alegre
SEA - POA
SEAPOA
Seattle/Tacoma Intl
Wed 2/25
11:45 am-1:00 pm
2 stops20h 15m
Porto Alegre Salgado Filho
Wed 4/1
5:10 pm-11:40 pm
2 stops34h 30m
$992
Showing 1-10 of 11 results
- 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.
SEA-POA
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.
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