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$508+ Cheap flights from Porto Alegre (POA) to Seattle (SEA)

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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
POA — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Porto Alegre to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Porto Alegre (POA) to Seattle (SEA). 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 September 11, 2025.

Round-trip from

$508
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$895
From Porto Alegre Salgado Filho to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 13% potential increase in price ($170 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($40 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Porto Alegre to Seattle

Cheapest flights from Porto Alegre to Seattle
Explore the most affordable flight options available from Porto Alegre to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 10/22:05 pmPOA - SEA
2 stops29h 40mUnited Airlines
Sat 10/1111:10 pmSEA - POA
2 stops37h 00mUnited Airlines
Deal found 9/10$508
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 12/112:05 pmPOA - SEA
2 stops35h 49mUnited Airlines
Wed 1/712:40 pmSEA - POA
2 stops24h 40mUnited Airlines
Deal found 9/10$1,028
This Copa Airlines deal was found by Cheapflights users on 9/11. 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.
Wed 10/11:25 amPOA - SEA
2 stops24h 28mCopa Airlines
Sat 10/115:26 pmSEA - POA
2 stops26h 54mCopa Airlines
Deal found 9/11$1,045
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Fri 10/35:10 pmPOA - SEA
2 stops31h 34mUnited Airlines
Fri 10/107:05 amSEA - POA
2 stops29h 00mUnited Airlines
Deal found 9/10$1,048
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/136:00 pmPOA - SEA
2 stops33h 02mDelta
Thu 1/88:00 amSEA - POA
2 stops41h 30mDelta
Deal found 9/10$1,056
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:40 amPOA - SEA
2 stops34h 51mDelta
Thu 1/88:00 amSEA - POA
2 stops41h 30mDelta
Deal found 9/10$1,058
This LATAM Airlines deal was found by Cheapflights users on 9/11. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1210:05 amPOA - SEA
2 stops32h 34mLATAM Airlines
Fri 9/191:30 pmSEA - POA
2 stops25h 45mLATAM Airlines
Deal found 9/11$1,072
This United Airlines deal was found by Cheapflights users on 9/10. 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.
Thu 12/113:25 pmPOA - SEA
2 stops34h 29mUnited Airlines
Thu 1/85:00 amSEA - POA
3 stops28h 35mUnited Airlines
Deal found 9/10$1,148

Cheapflights Fare Finder

 
Customize your flight search to find flights from Porto Alegre to Seattle 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 September 11, 2025.
Use the filters below to find and compare flights from Porto Alegre to Seattle that are best for you.

Fly from

Porto Alegre

Fly to

Seattle

Route

Depart

Return

Price

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Thu 10/2

2:05 pm-3:45 pm

2 stops29h 40m

Seattle/Tacoma Intl

Sat 10/11

11:10 pm-4:10 pm

2 stops37h 00m

$508

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Thu 1/22

2:05 pm-11:32 am

2 stops26h 27m

Seattle/Tacoma Intl

Mon 3/2

1:55 pm-4:10 pm

3 stops45h 15m

$772

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Thu 12/11

3:25 pm-8:54 pm

2 stops34h 29m

Seattle/Tacoma Intl

Wed 1/7

8:40 am-6:20 pm

3 stops28h 40m

$1,028

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Thu 12/11

2:05 pm-8:54 pm

2 stops35h 49m

Seattle/Tacoma Intl

Tue 1/6

12:40 pm-6:20 pm

3 stops48h 40m

$1,028

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Wed 10/1

1:25 am-9:53 pm

2 stops24h 28m

Seattle/Tacoma Intl

Sat 10/11

5:26 pm-12:20 am

2 stops26h 54m

$1,045

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Porto Alegre to Seattle

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

    United Airlines can get you from Porto Alegre to Seattle in just under 29h 40m. Your travel time can differ by up to . There are 6926 mi between Porto Alegre and Seattle.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Porto Alegre to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Porto Alegre to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Porto Alegre to Seattle (average of $238). Flying from Porto Alegre to Seattle in June is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

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Alternative routes for Porto Alegre to Seattle

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