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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Washington 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 Washington 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 Washington with another airline. 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 Washington 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 Washington 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>

$350 CHEAP FLIGHTS from Washington to Porto Alegre

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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Cheapest round-trip

$676

United Airlines

Mon 3/16Thu 3/19

SEA - POA • 2 stops

Cheapest one-way

$350

Multiple Airlines

Sat 1/17

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 Washington to Porto Alegre

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington 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

Recent round-trip flight deals from Washington to Porto Alegre

Mon, Mar 16 - Thu, Mar 19

11:59 pm - 2:25 pm

SEA

POA

34h 26m2 stops

3:30 pm - 7:03 pm

POA

SEA

31h 33m2 stops

$676United Airlines

Sun, Jan 18 - Sun, Feb 15

2:10 pm - 2:40 pm

SEA

POA

43h 30m2 stops

3:20 pm - 7:03 pm

POA

SEA

32h 43m2 stops

$821United Airlines

Fri, Mar 6 - Mon, Mar 9

8:40 am - 2:05 pm

SEA

POA

24h 25m2 stops

6:00 pm - 12:47 pm

POA

SEA

22h 47m2 stops

$835LATAM Airlines

Sun, Jan 18 - Sun, Feb 15

12:57 pm - 2:40 pm

SEA

POA

44h 43m3 stops

3:20 pm - 7:03 pm

POA

SEA

32h 43m2 stops

$880United Airlines

Mon, Mar 16 - Thu, Mar 19

8:00 am - 2:10 pm

SEA

POA

26h 10m3 stops

2:05 pm - 7:03 pm

POA

SEA

32h 58m2 stops

$1,062United Airlines

Fri, Mar 6 - Mon, Mar 9

10:05 am - 3:40 pm

SEA

POA

24h 35m3 stops

5:45 pm - 10:16 pm

POA

SEA

32h 31m2 stops

$1,153Multiple Airlines

Tue, Mar 17 - Thu, Mar 19

8:10 am - 4:30 pm

SEA

POA

28h 20m2 stops

2:05 pm - 10:16 pm

POA

SEA

36h 11m2 stops

$1,165Air Canada

Sun, Jan 18 - Sun, Feb 15

5:50 am - 2:40 pm

SEA

POA

27h 50m3 stops

3:20 pm - 2:31 pm

POA

SEA

28h 11m3 stops

$1,316Air Canada

Fri, Mar 6 - Mon, Mar 9

7:00 am - 2:40 pm

SEA

POA

26h 40m2 stops

5:10 pm - 8:58 pm

POA

SEA

31h 48m3 stops

$1,317United Airlines

Fri, Mar 6 - Mon, Mar 9

5:50 am - 2:40 pm

SEA

POA

27h 50m3 stops

2:05 pm - 3:01 pm

POA

SEA

28h 56m3 stops

$1,338Multiple Airlines

Useful Info

Cheapest flight	$350

Flight from Seattle to Porto Alegre

How does KAYAK find such low prices on flights from Washington 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 Washington to Porto Alegre.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington to Porto Alegre?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Washington 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 Washington 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 Washington with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington 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 Washington 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 to Porto Alegre

Airports

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Information on the airport you'll fly into in Porto Alegre

Porto Alegre (POA)

POA

$350 Find Cheap Flights from Washington 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 Washington to Porto Alegre

Recent round-trip flight deals from Washington to Porto Alegre

Recent one-way flight deals from Washington to Porto Alegre

Good to know

FAQs for booking flights from Washington to Porto Alegre

How does KAYAK find such low prices on flights from Washington 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 Washington to Porto Alegre.

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

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from Washington 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 Washington 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 Washington with another airline.

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

Information on the airport you'll fly into in Porto Alegre

Cabin class types available on flights to Washington

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

Find direct flights for 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