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$510+ 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 3/25. Fares are subject to change and may not be available on all flights or dates of travel.
POA — SEA
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

Round-trip from

$509
(United Airlines)

Popular in

December

Cheapest in

June

Average price

$1,066
From Porto Alegre Salgado Filho to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 22% potential increase in price ($297 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($46 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 30, 2025.

This SmartFares 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/286:00 pmPOA - SEA
2 stops23h 39mLATAM Airlines
Fri 12/57:55 amSEA - POA
2 stops28h 05mLATAM Airlines
Deal found 10/29$968
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.
Fri 11/283:25 pmPOA - SEA
3 stops31h 45mUnited Airlines
Fri 12/57:10 amSEA - POA
2 stops28h 00mUnited Airlines
Deal found 10/29$2,390

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 October 30, 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

Wed 3/25

3:25 pm-10:32 pm

2 stops35h 07m

Seattle/Tacoma Intl

Sun 3/29

11:50 pm-4:10 pm

2 stops36h 20m

$510

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Mon 3/9

5:10 pm-8:35 pm

2 stops31h 25m

Seattle/Tacoma Intl

Wed 3/25

7:00 am-6:20 pm

2 stops31h 20m

$609

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Fri 3/6

5:10 pm-11:23 am

2 stops23h 13m

Seattle/Tacoma Intl

Tue 3/24

12:45 pm-2:35 pm

3 stops45h 50m

$609

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Wed 3/11

3:25 pm-11:07 pm

2 stops35h 42m

Seattle/Tacoma Intl

Wed 3/25

12:45 pm-2:35 pm

3 stops45h 50m

$609

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Mon 3/9

5:10 pm-8:35 pm

2 stops31h 25m

Seattle/Tacoma Intl

Thu 3/26

7:00 am-2:35 pm

2 stops27h 35m

$709

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Thu 3/12

3:25 pm-11:07 pm

2 stops35h 42m

Seattle/Tacoma Intl

Sun 3/22

11:59 pm-4:10 pm

2 stops36h 11m

$775

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Sun 3/8

3:10 pm-12:20 pm

2 stops25h 10m

Seattle/Tacoma Intl

Sat 3/21

11:59 pm-2:35 pm

2 stops34h 36m

$775

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Sun 3/8

3:10 pm-6:58 pm

2 stops31h 48m

Seattle/Tacoma Intl

Wed 3/25

7:00 am-6:20 pm

2 stops31h 20m

$775

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Sun 3/8

3:10 pm-4:14 pm

3 stops29h 04m

Seattle/Tacoma Intl

Tue 3/24

11:00 am-2:35 pm

2 stops23h 35m

$775

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Wed 2/4

3:25 pm-4:01 pm

2 stops29h 36m

Seattle/Tacoma Intl

Mon 2/16

11:59 pm-6:20 pm

2 stops37h 21m

$775

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

Showing 1-10 of 15 results
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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.

Cheapflights Insights

Everything you need to know about your flight from Porto Alegre to Seattle

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

Currently, June is the cheapest month in which you can book a flight from Porto Alegre to Seattle (average of $501). Flying from Porto Alegre to Seattle in November is currently the most expensive (average of $1,293). 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.

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 35h 07m. 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, June is the cheapest month in which you can book a flight from Porto Alegre to Seattle (average of $501). Flying from Porto Alegre to Seattle in November is currently the most expensive (average of $1,293). 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

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Alternative routes for Porto Alegre to Seattle

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