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Porto Alegre

$507+ Cheap flights from Seattle (SEA) to Porto Alegre (POA)

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 9/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — POA
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
1 adult, Economy
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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 julio 3, 2025.

Round-trip from

$507
(United Airlines)
From Seattle/Tacoma Intl to Porto Alegre Salgado Filho
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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 julio 3, 2025.

This United Airlines deal was found by Cheapflights users on 7/2. 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.
mar. 9/97:00 amSEA - POA
2 stops29h 50mUnited Airlines
mar. 9/233:30 pmPOA - SEA
2 stops24h 01mUnited Airlines
Deal found 7/2$507
This Copa Airlines deal was found by Cheapflights users on 7/2. 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.
mar. 9/95:14 pmSEA - POA
2 stops27h 06mCopa Airlines
lun. 9/221:27 amPOA - SEA
2 stops24h 48mCopa Airlines
Deal found 7/2$900
This SmartFares deal was found by Cheapflights users on 7/2. 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.
sáb. 8/167:20 amSEA - POA
2 stops22h 25mMultiple Airlines
sáb. 8/236:50 amPOA - SEA
2 stops21h 09mMultiple Airlines
Deal found 7/2$906
This Priceline deal was found by Cheapflights users on 7/1. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/118:00 amSEA - POA
2 stops42h 25mLATAM Airlines
sáb. 8/28:55 pmPOA - SEA
2 stops50h 55mLATAM Airlines
Deal found 7/1$916
This Delta deal was found by Cheapflights users on 7/2. 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.
mié. 9/106:00 amSEA - POA
2 stops20h 25mDelta
mié. 9/246:40 amPOA - SEA
2 stops21h 14mDelta
Deal found 7/2$3,509
This Mytrip deal was found by Cheapflights users on 7/1. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 7/1110:00 amSEA - POA
3 stops33h 15mAir Canada
sáb. 8/21:35 pmPOA - SEA
3 stops28h 41mAir Canada
Deal found 7/1$4,492

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 julio 3, 2025.
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

mar. 9/9

7:00 am-4:50 pm

2 stops29h 50m

Porto Alegre Salgado Filho

mar. 9/23

3:30 pm-11:31 am

2 stops24h 01m

$507

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

mar. 9/9

5:14 pm-12:20 am

2 stops27h 06m

Porto Alegre Salgado Filho

lun. 9/22

1:27 am-10:15 pm

2 stops24h 48m

$900

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

sáb. 8/16

7:20 am-9:45 am

2 stops22h 25m

Porto Alegre Salgado Filho

sáb. 8/23

6:50 am-11:59 pm

2 stops21h 09m

$906

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

vie. 7/11

8:00 am-6:25 am

2 stops42h 25m

Porto Alegre Salgado Filho

sáb. 8/2

8:55 pm-7:50 pm

2 stops50h 55m

$916

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

mié. 9/10

6:00 am-6:25 am

2 stops20h 25m

Porto Alegre Salgado Filho

mié. 9/24

6:40 am-11:54 pm

2 stops21h 14m

$3,509

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

vie. 7/11

10:00 am-11:15 pm

3 stops33h 15m

Porto Alegre Salgado Filho

sáb. 8/2

1:35 pm-2:16 pm

3 stops28h 41m

$4,492

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

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.

Cheapflights Insights

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

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 julio 3, 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.

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 julio 3, 2025.
Read through reviews of airlines operating flights from Seattle to Porto Alegre, such as Delta, LATAM Airlines, and Copa Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
LATAM Airlines
7.5
Good
1,805 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Copa Airlines
7.5
Good
1,467 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air Canada
7.1
Good
9,681 reviews
Delta
8.0
Very good
7,982 reviews

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • 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.

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