HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Porto Alegre

$396+ 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 5/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — POA
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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

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 January 21, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$802
(United Airlines)
Provider with most accurate pricing for Seattle/Tacoma Intl-Porto Alegre Salgado Filho flight deals.
Search Deals
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

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 January 21, 2025.

This United Airlines deal was found by Cheapflights users on 1/20. 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 3/512:25 pmSEA - POA
2 stops23h 25mUnited Airlines
Wed 3/125:35 pmPOA - SEA
2 stops33h 18mUnited Airlines
Deal found 1/20$802
This Kissandfly.com deal was found by Cheapflights users on 1/20. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/612:15 pmSEA - POA
2 stops23h 35mAzul
Thu 3/135:35 pmPOA - SEA
2 stops23h 17mAzul
Deal found 1/20$873
This United Airlines deal was found by Cheapflights users on 1/20. 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 3/612:15 pmSEA - POA
2 stops23h 35mMultiple Airlines
Thu 3/135:35 pmPOA - SEA
2 stops23h 17mMultiple Airlines
Deal found 1/20$880
This Kissandfly.com deal was found by Cheapflights users on 1/20. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/612:15 pmSEA - POA
2 stops23h 35mLufthansa
Thu 3/135:35 pmPOA - SEA
2 stops29h 44mLufthansa
Deal found 1/20$892
This Kissandfly.com deal was found by Cheapflights users on 1/20. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/612:15 pmSEA - POA
2 stops23h 35mCopa Airlines
Wed 3/121:15 amPOA - SEA
2 stops22h 04mCopa Airlines
Deal found 1/20$1,038
This Kissandfly.com deal was found by Cheapflights users on 1/20. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/67:00 amSEA - POA
3 stops27h 30mBritish Airways
Thu 3/137:20 pmPOA - SEA
3 stops25h 39mBritish Airways
Deal found 1/20$1,073
This Aeromexico deal was found by Cheapflights users on 1/20. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/19:24 amSEA - POA
2 stops21h 21mAeromexico
Fri 3/74:35 amPOA - SEA
2 stops43h 19mAeromexico
Deal found 1/20$1,717
This American Airlines deal was found by Cheapflights users on 1/20. 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.
Wed 3/512:59 amSEA - POA
2 stops33h 31mAmerican Airlines
Thu 3/137:20 pmPOA - SEA
2 stops32h 04mAmerican Airlines
Deal found 1/20$1,881

Find flights from Seattle to Porto Alegre within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Wed 3/5

12:25 pm-4:50 pm

2 stops23h 25m

Porto Alegre Salgado Filho

Wed 3/12

5:35 pm-10:53 pm

2 stops33h 18m

$802

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 3/6

12:15 pm-4:50 pm

2 stops23h 35m

Porto Alegre Salgado Filho

Thu 3/13

5:35 pm-12:52 pm

2 stops23h 17m

$873

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 3/6

12:15 pm-4:50 pm

2 stops23h 35m

Porto Alegre Salgado Filho

Thu 3/13

5:35 pm-12:52 pm

2 stops23h 17m

$880

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 3/6

12:15 pm-4:50 pm

2 stops23h 35m

Porto Alegre Salgado Filho

Thu 3/13

5:35 pm-7:19 pm

2 stops29h 44m

$892

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 3/6

12:15 pm-4:50 pm

2 stops23h 35m

Porto Alegre Salgado Filho

Wed 3/12

1:15 am-7:19 pm

2 stops22h 04m

$1,038

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 3/6

7:00 am-3:30 pm

3 stops27h 30m

Porto Alegre Salgado Filho

Thu 3/13

7:20 pm-4:59 pm

3 stops25h 39m

$1,073

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Sat 3/1

9:24 am-11:45 am

2 stops21h 21m

Porto Alegre Salgado Filho

Fri 3/7

4:35 am-6:54 pm

2 stops43h 19m

$1,717

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Wed 3/5

12:59 am-3:30 pm

2 stops33h 31m

Porto Alegre Salgado Filho

Thu 3/13

7:20 pm-11:24 pm

2 stops32h 04m

$1,881

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 5/27

5:14 pm-12:15 am

2 stops27h 01m

$396

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Thu 5/29

11:15 pm-6:25 am

2 stops27h 10m

$533

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 11 results
1
2

Compare providers for flights from Seattle to Porto Alegre

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Porto Alegre in January.
ProviderPrice AccuracyTrust Score*
AranGrantPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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 >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.

Travel insights for flights from Seattle to Porto Alegre

Get recent, data-driven insights about flights from Seattle to Porto Alegre including ideal travel times, pricing trends, and more.

What is the cheapest time of day to fly from SEA to POA?

Find hourly flight availability from Seattle to Porto Alegre. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

When flying from Seattle to Porto Alegre, the time of day you fly usually plays a role in the price. Save by searching for a flight at noon, which can drop the price by up to 17% versus a flight in the morning.

Rainfall in Porto Alegre by month

Plan your trip to Porto Alegre by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Porto Alegre ranges from 2.8 - 5.1 inches per month. September is typically the wettest month, when rainfall can reach 5.1 in. November is typically the driest time to visit Porto Alegre when rainfall is around 2.8 in.

Temperature in Porto Alegre by month

Plan your trip to Porto Alegre by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Porto Alegre, use this chart to help with planning. For those seeking warmer temperatures, February is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 55.4 F).

Reviews of airlines servicing Porto Alegre

Get insights into the airlines that provide service to Porto Alegre. 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 Porto Alegre. Reviews last updated January 21, 2025.
Azul
8.0
Very good
812 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.6

Food

7.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Very good we were taken care of in all aspects when traveling with our 1 year old. Would recommend Azul and I will travel with them again.

Azul
8.0
Very good
812 reviews
Azul
8.0
Very good
812 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.6

Food

7.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Very good we were taken care of in all aspects when traveling with our 1 year old. Would recommend Azul and I will travel with them again.

Copa Airlines
7.7
Good
1,662 reviews
Azul
8.0
Very good
812 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.6

Food

7.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Very good we were taken care of in all aspects when traveling with our 1 year old. Would recommend Azul and I will travel with them again.

Aeromexico
7.5
Good
1,849 reviews
Azul
8.0
Very good
812 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.6

Food

7.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Very good we were taken care of in all aspects when traveling with our 1 year old. Would recommend Azul and I will travel with them again.

United Airlines
7.4
Good
8,984 reviews
Azul
8.0
Very good
812 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.6

Food

7.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Very good we were taken care of in all aspects when traveling with our 1 year old. Would recommend Azul and I will travel with them again.

American Airlines
7.2
Good
10,000 reviews
Azul
8.0
Very good
812 reviews

Boarding

8.1

Comfort

8.0

Entertainment

7.6

Food

7.2

Overall

8.0

Crew

8.6

Reviews

1 / 10

Very good we were taken care of in all aspects when traveling with our 1 year old. Would recommend Azul and I will travel with them again.

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.

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

    Currently priced at $802, United Airlines will fly you from Seattle to Porto Alegre and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Azul and Lufthansa - these airlines can fly you to your destination from $873 and $892, respectively.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Porto Alegre

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Porto Alegre flights

Top airline flying from Seattle to Porto Alegre

Discover the top airline that operate flights from Seattle to Porto Alegre. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$869Average$1,032FlexibilityNo cancel feeOn-time71%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.