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>

$456 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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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 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

Last minute

Recent round-trip flight deals from Washington to Porto Alegre

Sat, Mar 14 - Wed, Mar 18

11:59 pm - 2:20 pm

SEA

POA

34h 21m2 stops

5:10 pm - 10:45 pm

POA

SEA

33h 35m2 stops

$738United 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

Fri, Jan 30 - Fri, Feb 6

11:59 pm - 2:45 pm

PDX

POA

33h 46m2 stops

6:15 pm - 6:55 pm

POA

PDX

29h 40m3 stops

$1,317United Airlines

Fri, Jan 30 - Fri, Feb 6

1:24 pm - 2:45 pm

PDX

POA

44h 21m3 stops

2:05 pm - 6:55 pm

POA

PDX

33h 50m3 stops

$1,385United Airlines

Wed, Apr 29 - Sun, May 3

7:00 am - 6:20 pm

PDX

POA

31h 20m2 stops

11:15 am - 8:41 pm

POA

PDX

37h 26m2 stops

$1,406United Airlines

Wed, Apr 29 - Sun, May 3

7:00 am - 2:35 pm

PDX

POA

27h 35m2 stops

11:15 am - 10:08 pm

POA

PDX

38h 53m2 stops

$1,424United Airlines

Sat, Mar 14 - Wed, Mar 18

8:59 am - 3:25 pm

SEA

POA

26h 26m3 stops

5:10 pm - 8:58 pm

POA

SEA

31h 48m3 stops

$1,622United Airlines

Sat, Mar 14 - Wed, Mar 18

8:59 am - 10:35 am

SEA

POA

21h 36m3 stops

5:10 pm - 8:58 pm

POA

SEA

31h 48m3 stops

$1,715United Airlines

Fri, Dec 26 - Thu, Jan 8

5:33 am - 3:40 pm

PDX

POA

29h 07m2 stops

6:00 pm - 11:45 am

POA

PDX

22h 45m2 stops

$1,995American Airlines

Fri, Dec 26 - Tue, Jan 6

5:33 am - 3:40 pm

PDX

POA

29h 07m2 stops

7:20 pm - 11:46 pm

POA

PDX

33h 26m2 stops

$2,591American Airlines

Useful Info

Cheapest flight	$456

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

$456 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

Recent last minute 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