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Cheap flights from Washington to Porto Alegre from $361

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Porto Alegre departing on 3/30. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
Travel Warning: Due to flooding, the airport may be currently closed. Check local travel advisories before booking.

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Find the cheapest flights from Washington to Porto Alegre

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:25 am - 11:40 am
SEA
-
POA
24h 15m
2 stops
Multiple Airlines Logo
8:20 pm - 10:00 am
POA
-
SEA
41h 40m
2 stops
$983Multiple Airlines
Mon, Apr 13 - Mon, Apr 20
United Airlines Logo
11:35 am - 1:45 pm
SEA
-
POA
46h 10m
3 stops
United Airlines Logo
5:10 pm - 11:02 am
POA
-
SEA
21h 52m
2 stops
$1,148United Airlines
Mon, Apr 13 - Mon, Apr 20
Air Canada Logo
8:00 am - 5:45 pm
SEA
-
POA
29h 45m
2 stops
Air Canada Logo
5:55 pm - 10:16 pm
POA
-
SEA
32h 21m
2 stops
$1,365Air Canada
Tue, Mar 17 - Thu, Mar 19
United Airlines Logo
7:00 am - 10:10 am
PDX
-
POA
47h 10m
2 stops
United Airlines Logo
5:10 pm - 10:29 pm
POA
-
PDX
33h 19m
2 stops
$1,548United Airlines
Thu, Apr 2 - Mon, Apr 6
United Airlines Logo
7:00 am - 1:45 pm
PDX
-
POA
26h 45m
2 stops
United Airlines Logo
5:10 pm - 10:34 pm
POA
-
PDX
33h 24m
2 stops
$1,549United Airlines
Thu, Apr 2 - Mon, Apr 6
Air Canada Logo
8:00 am - 5:45 pm
SEA
-
POA
29h 45m
2 stops
Air Canada Logo
3:30 pm - 10:16 pm
POA
-
SEA
34h 46m
2 stops
$1,638Air Canada
Tue, Mar 17 - Thu, Mar 19
United Airlines Logo
8:59 am - 4:25 pm
SEA
-
POA
27h 26m
3 stops
United Airlines Logo
3:30 pm - 7:03 pm
POA
-
SEA
31h 33m
2 stops
$1,681United Airlines
Tue, Mar 17 - Thu, Mar 19
United Airlines Logo
11:59 pm - 1:45 pm
SEA
-
POA
33h 46m
2 stops
United Airlines Logo
4:55 pm - 10:37 pm
POA
-
SEA
33h 42m
2 stops
$1,683United Airlines
Sat, Apr 11 - Sat, Apr 18
United Airlines Logo
8:59 am - 2:25 pm
SEA
-
POA
25h 26m
3 stops
United Airlines Logo
3:30 pm - 8:58 pm
POA
-
SEA
33h 28m
3 stops
$1,781United Airlines
Tue, Mar 17 - Thu, Mar 19
American Airlines Logo
10:25 am - 12:00 pm
SEA
-
POA
21h 35m
3 stops
American Airlines Logo
7:40 pm - 2:27 pm
POA
-
SEA
22h 47m
3 stops
$3,085American Airlines
Mon, Apr 13 - Mon, Apr 20

Air Canada flights from State of Washington to Porto Alegre

Our best Air Canada deals on State of Washington to Porto Alegre flight tickets
Air Canada
Mar 17
SEA8:00 amSeattle/Tacoma Intl
29h 45m
2 stops
POA5:45 pmPorto Alegre Salgado Filho
Mar 19
POA5:55 pmPorto Alegre Salgado Filho
32h 21m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$1,365
Air Canada
Mar 17
SEA8:00 amSeattle/Tacoma Intl
29h 45m
2 stops
POA5:45 pmPorto Alegre Salgado Filho
Mar 19
POA3:30 pmPorto Alegre Salgado Filho
34h 46m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$1,638

United Airlines flights from State of Washington to Porto Alegre

Our best United Airlines deals on State of Washington to Porto Alegre flight tickets
United Airlines
Apr 13
SEA11:35 amSeattle/Tacoma Intl
46h 10m
3 stops
POA1:45 pmPorto Alegre Salgado Filho
Apr 20
POA5:10 pmPorto Alegre Salgado Filho
21h 52m
2 stops
SEA11:02 amSeattle/Tacoma Intl
$1,148
United Airlines
Apr 2
PDX7:00 amPortland
47h 10m
2 stops
POA10:10 amPorto Alegre Salgado Filho
Apr 6
POA5:10 pmPorto Alegre Salgado Filho
33h 19m
2 stops
PDX10:29 pmPortland
$1,548
United Airlines
Apr 2
PDX7:00 amPortland
26h 45m
2 stops
POA1:45 pmPorto Alegre Salgado Filho
Apr 6
POA5:10 pmPorto Alegre Salgado Filho
33h 24m
2 stops
PDX10:34 pmPortland
$1,549

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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, momondo users made 832,500 searches. Data last updated February 27, 2026.
Use the filters below to find and compare flights from Washington to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Mon 4/13

7:25 am-11:40 am

2 stops24h 15m

Porto Alegre Salgado Filho

Mon 4/20

8:20 pm-10:00 am

2 stops41h 40m

$983

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Mon 4/13

11:35 am-1:45 pm

3 stops46h 10m

Porto Alegre Salgado Filho

Mon 4/20

5:10 pm-11:02 am

2 stops21h 52m

$1,148

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 3/17

8:00 am-5:45 pm

2 stops29h 45m

Porto Alegre Salgado Filho

Thu 3/19

5:55 pm-10:16 pm

2 stops32h 21m

$1,365

PortlandPorto Alegre

PDX - POA

PDXPOA

Portland

Thu 4/2

7:00 am-10:10 am

2 stops47h 10m

Porto Alegre Salgado Filho

Mon 4/6

5:10 pm-10:29 pm

2 stops33h 19m

$1,548

PortlandPorto Alegre

PDX - POA

PDXPOA

Portland

Thu 4/2

7:00 am-1:45 pm

2 stops26h 45m

Porto Alegre Salgado Filho

Mon 4/6

5:10 pm-10:34 pm

2 stops33h 24m

$1,549

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 3/17

8:00 am-5:45 pm

2 stops29h 45m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-10:16 pm

2 stops34h 46m

$1,638

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 3/17

8:59 am-4:25 pm

3 stops27h 26m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-7:03 pm

2 stops31h 33m

$1,681

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Sat 4/11

11:59 pm-1:45 pm

2 stops33h 46m

Porto Alegre Salgado Filho

Sat 4/18

4:55 pm-10:37 pm

2 stops33h 42m

$1,683

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Tue 3/17

8:59 am-2:25 pm

3 stops25h 26m

Porto Alegre Salgado Filho

Thu 3/19

3:30 pm-8:58 pm

3 stops33h 28m

$1,781

SeattlePorto Alegre

SEA - POA

SEAPOA

Seattle/Tacoma Intl

Mon 4/13

10:25 am-12:00 pm

3 stops21h 35m

Porto Alegre Salgado Filho

Mon 4/20

7:40 pm-2:27 pm

3 stops22h 47m

$3,085

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 12 resultsSorted by cheapest first
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Cheap State of Washington to Porto Alegre flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Porto Alegre

Fastest flight time

26h 45m

Direct flights

None
The fastest flight from State of Washington to Porto Alegre takes 26h 45m
There are no direct flights from State of Washington to Porto Alegre. There are no popular flight routes from State of Washington to Porto Alegre.
Search flight deals

  • When did momondo last update prices for flights from Washington to Porto Alegre Salgado Filho Airport?

    Prices for flights from Washington to Porto Alegre Salgado Filho Airport are updated daily.

  • How old do you have to be to fly from Washington to Porto Alegre Salgado Filho Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington to Porto Alegre Salgado Filho Airport.

  • What documentation or ID do you need to fly to Porto Alegre Salgado Filho Airport?

    The travel and health documents you'll need for your trip to Porto Alegre Salgado Filho Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Porto Alegre Salgado Filho Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • How do I get Price Alerts for flights from State of Washington to Porto Alegre?

    You can take advantage of momondo’s Price Alerts by first searching for your flights to State of Washington from Porto Alegre. Flight offers will be shown to you in real-time. From there you can create a Price Alert by using our on-site widget.

  • How can I save money on flights from State of Washington to Porto Alegre with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    momondo shows deals across 700+ competitors all at once. momondo is active in 30 international markets, so you can have access to a wide range of options from airlines and OTAs alike.

Why use momondo?

Why should I use momondo to find a flight deal from Washington to Porto Alegre?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Porto Alegre. momondo saves you time and could save you money on your trip.

Can I find flights from Washington to Porto Alegre with flexible booking policies on momondo?

Yes. All flights to Porto Alegre from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington to Porto Alegre?

momondo provides multiple filters to help you find the best flight to Porto Alegre from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Washington to Porto Alegre right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Washington to Porto Alegre flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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