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$603+ 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
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
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 July 29, 2025.

Round-trip from

$603
(United Airlines)

Popular in

December

Cheapest in

August

Average price

$1,291
From Porto Alegre Salgado Filho to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 12% potential increase in price ($164 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 July 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 July 29, 2025.

This United Airlines deal was found by Cheapflights users on 7/28. 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
3 stops37h 10mUnited Airlines
Sat 10/1111:10 pmSEA - POA
2 stops35h 25mUnited Airlines
Deal found 7/28$603
This Copa Airlines deal was found by Cheapflights users on 7/27. 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.
Tue 9/301:25 amPOA - SEA
2 stops38h 31mCopa Airlines
Sat 10/115:31 pmSEA - POA
2 stops26h 49mCopa Airlines
Deal found 7/27$1,043
This FlightHub deal was found by Cheapflights users on 7/27. 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.
Wed 10/18:40 pmPOA - SEA
3 stops31h 44mLATAM Airlines
Sat 10/111:40 pmSEA - POA
2 stops23h 20mLATAM Airlines
Deal found 7/27$1,180
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/21:55 pmPOA - SEA
2 stops28h 53mAmerican Airlines
Sat 10/117:44 amSEA - POA
3 stops22h 41mAmerican Airlines
Deal found 7/27$2,290

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 July 29, 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-11:15 pm

3 stops37h 10m

Seattle/Tacoma Intl

Sat 10/11

11:10 pm-2:35 pm

2 stops35h 25m

$603

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Wed 1/21

4:40 am-10:13 pm

2 stops22h 33m

Seattle/Tacoma Intl

Mon 3/2

11:35 pm-6:30 am

2 stops25h 55m

$908

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Tue 9/30

1:25 am-11:56 am

2 stops38h 31m

Seattle/Tacoma Intl

Sat 10/11

5:31 pm-12:20 am

2 stops26h 49m

$1,043

Porto AlegreSeattle

POA - SEA

POASEA

Porto Alegre Salgado Filho

Thu 10/2

1:55 pm-2:48 pm

2 stops28h 53m

Seattle/Tacoma Intl

Sat 10/11

7:44 am-10:25 am

3 stops22h 41m

$2,290

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

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.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 29, 2025.
See what other customers who have flown with LATAM Airlines, Copa Airlines, and United Airlines from Porto Alegre to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,821 reviews

Comfort

7.4

Boarding

7.6

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
LATAM Airlines
7.5
Good
1,821 reviews
LATAM Airlines
7.5
Good
1,821 reviews

Comfort

7.4

Boarding

7.6

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
Copa Airlines
7.5
Good
1,493 reviews
LATAM Airlines
7.5
Good
1,821 reviews

Comfort

7.4

Boarding

7.6

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
United Airlines
7.4
Good
8,899 reviews
LATAM Airlines
7.5
Good
1,821 reviews

Comfort

7.4

Boarding

7.6

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
American Airlines
7.2
Good
10,000 reviews
LATAM Airlines
7.5
Good
1,821 reviews

Comfort

7.4

Boarding

7.6

Crew

8.1

Entertainment

7.0

Food

6.7

Overall

7.5

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing

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.

  • What are the cheapest airlines flying from Porto Alegre to Seattle round-trip?

    Our cheapest airline available from Porto Alegre to Seattle is United Airlines. Our recent data shows that you can find tickets from as low as $603 on this airline. Additional options worth looking into are LATAM Airlines and Copa Airlines, starting at $908 and $1,043 round-trip. United Airlines is 45% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 $389). 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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