What is the cheapest flight from Seattle to Porto Alegre?

In the last 3 days, the lowest price for a flight from Seattle to Porto Alegre was $456 for a one-way ticket and $738 for a round-trip. Visit our flight page for the latest deals!>/a>

Do I need a passport to fly between Seattle and Porto Alegre?

Yes, you’ll need a passport to travel to Porto Alegre from Seattle. Visit our flight page for the latest deals!>/a>

Which aircraft models fly most regularly from Seattle to Porto Alegre?

We unfortunately don’t have that data for this specific route.

How does KAYAK find such low prices on flights from Seattle to Porto Alegre?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Porto Alegre. Visit our flight page for the latest deals!>/a>

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Porto Alegre?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Seattle is likely to change within 7 days, so travelers know whether to wait or book now. Visit our flight page for the latest deals!>/a>

What is the Hacker Fare option on flights from Seattle to Porto Alegre?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto Alegre with an airline and back to Seattle with another airline. Booking your flights between Seattle and POA can sometimes prove cheaper using this method. Visit our flight page for the latest deals!>/a>

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Porto Alegre?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto Alegre from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best. Visit our flight page for the latest deals!>/a>

$456 CHEAP FLIGHTS from Seattle to Porto Alegre (SEA - POA)

SEA - POA

KAYAK searches hundreds of travel sites at once for deals on flights to Porto Alegre

...and more

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41.299.237 searches in the past 7 days on KAYAK

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Filter your dealsChoose cabin class, free Wi-Fi and more.

Cheapest round-trip

$738

United Airlines

Sat 3/14Wed 3/18

SEA - POA • 2 stops

Cheapest one-way

$456

Multiple Airlines

Wed 2/4

SEA - POA • 3 stops

Start a new search

KAYAK searches 100s of sites at once to find you the best travel deals.

We hope you love your trip to Porto Alegre!

Flight Deals

Cheap Flights from Seattle to Porto Alegre (SEA-POA)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Porto Alegre that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Recent round-trip flight deals from Seattle to Porto Alegre

Sat, Mar 14 - Wed, Mar 18

11:59 pm - 4:20 pm

SEA

POA

36h 21m2 stops

5:10 pm - 10:45 pm

POA

SEA

33h 35m2 stops

$738United Airlines

Mon, Jan 26 - Mon, Feb 9

7:00 am - 2:40 pm

SEA

POA

26h 40m2 stops

6:10 pm - 6:14 pm

POA

SEA

29h 04m2 stops

$812United Airlines

Tue, Jan 27 - Thu, Feb 5

2:10 pm - 6:20 pm

SEA

POA

47h 10m2 stops

2:05 pm - 10:43 pm

POA

SEA

37h 38m3 stops

$825United Airlines

Tue, Jan 27 - Thu, Feb 5

12:35 pm - 6:20 pm

SEA

POA

48h 45m3 stops

2:05 pm - 10:43 pm

POA

SEA

37h 38m3 stops

$833United Airlines

Sat, Jan 24 - Sat, Feb 7

9:59 pm - 5:00 pm

SEA

POA

38h 01m2 stops

7:45 am - 10:07 am

POA

SEA

31h 22m2 stops

$949LATAM Airlines

Sat, Mar 14 - Wed, Mar 18

12:36 pm - 4:20 pm

SEA

POA

47h 44m3 stops

5:10 pm - 10:45 pm

POA

SEA

33h 35m2 stops

$1,006United Airlines

Mon, Jan 26 - Mon, Feb 9

8:10 am - 2:40 pm

SEA

POA

25h 30m2 stops

2:05 pm - 4:01 pm

POA

SEA

30h 56m3 stops

$1,007United Airlines

Sat, Jan 24 - Sat, Feb 7

12:40 pm - 6:20 pm

SEA

POA

48h 40m3 stops

3:15 pm - 4:01 pm

POA

SEA

29h 46m2 stops

$1,029United Airlines

Mon, Jan 26 - Tue, Jan 27

8:10 am - 6:15 pm

SEA

POA

29h 05m2 stops

9:20 pm - 10:16 pm

POA

SEA

53h 56m2 stops

$1,316Multiple Airlines

Sat, Jan 24 - Sat, Feb 7

5:50 am - 2:50 pm

SEA

POA

28h 00m3 stops

4:55 pm - 7:16 pm

POA

SEA

31h 21m3 stops

$1,407Multiple Airlines

Useful Info

Cheapest flight	$456

Flight from Seattle to Porto Alegre

When to book flights from Seattle to Porto Alegre

Are your dates flexible? Find out the best times to travel from Seattle to Porto Alegre based on our flight data from the last year. Discover the cheapest month and even day to fly.

Estimated round-trip price

KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

What is the cheapest flight from Seattle to Porto Alegre?
In the last 3 days, the lowest price for a flight from Seattle to Porto Alegre was $456 for a one-way ticket and $738 for a round-trip.
Do I need a passport to fly between Seattle and Porto Alegre?
Yes, you’ll need a passport to travel to Porto Alegre from Seattle.
Which aircraft models fly most regularly from Seattle to Porto Alegre?
We unfortunately don’t have that data for this specific route.
How does KAYAK find such low prices on flights from Seattle to Porto Alegre?
KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Porto Alegre.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Porto Alegre?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.
What is the Hacker Fare option on flights from Seattle to Porto Alegre?
Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto Alegre with an airline and back to Seattle with another airline. Booking your flights between Seattle and POA can sometimes prove cheaper using this method.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Porto Alegre?
Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto Alegre from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on your arrival and departure airports

Seattle (SEA)

Porto Alegre (POA)

SEA - POA

$456 Find Cheap Flights from Seattle to Porto Alegre

KAYAK searches hundreds of travel sites at once for deals on flights to Porto Alegre

Everything you should know

Cheap Flights from Seattle to Porto Alegre (SEA-POA)

Recent round-trip flight deals from Seattle to Porto Alegre

Recent one-way flight deals from Seattle to Porto Alegre

Recent last minute flight deals from Seattle to Porto Alegre

Good to know

When to book flights from Seattle to Porto Alegre

FAQs for booking flights from Seattle to Porto Alegre

What is the cheapest flight from Seattle to Porto Alegre?

In the last 3 days, the lowest price for a flight from Seattle to Porto Alegre was $456 for a one-way ticket and $738 for a round-trip.

Do I need a passport to fly between Seattle and Porto Alegre?

Yes, you’ll need a passport to travel to Porto Alegre from Seattle.

Which aircraft models fly most regularly from Seattle to Porto Alegre?

We unfortunately don’t have that data for this specific route.

How does KAYAK find such low prices on flights from Seattle to Porto Alegre?

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Porto Alegre.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Porto Alegre?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

What is the Hacker Fare option on flights from Seattle to Porto Alegre?

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Porto Alegre with an airline and back to Seattle with another airline. Booking your flights between Seattle and POA can sometimes prove cheaper using this method.

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Porto Alegre?

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Porto Alegre from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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

Information on your arrival and departure airports

Cabin class types available on flights from Seattle to Porto Alegre

Complete your trip to Porto Alegre with a hotel stay or car rental

Find direct flights to and from Seattle and Porto Alegre

Flights to other popular destinations

Flights from domestic origins to Porto Alegre

Choose which airport to fly into in Porto Alegre

Find deals for your return flight