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Cheap flights from Washington, D.C. to Porto Alegre from $465

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, D.C. to Porto Alegre departing on 10/21. 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
1 adult, Economy, 0 bags

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Travel Warning: Due to flooding, the airport may be currently closed. Check local travel advisories before booking.

Find the cheapest flights from Washington, D.C. to Porto Alegre

Cheap round-trip flights

Enter your travel dates to find the best prices.
Copa Airlines Logo
2:25 am - 12:20 amIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
20h 55m1 stop Panama City Tocumen Intl
Copa Airlines Logo
1:20 am - 4:20 amPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
28h 00m1 stop Panama City Tocumen Intl
$810Copa Airlines
Wed, Sep 23 - Wed, Sep 30
Copa Airlines Logo
2:25 am - 12:20 amIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
20h 55m1 stop Panama City Tocumen Intl
Copa Airlines Logo
1:20 am - 4:20 amPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
28h 00m1 stop Panama City Tocumen Intl
$870Copa Airlines
Mon, Oct 5 - Thu, Oct 15
Copa Airlines Logo
2:25 am - 12:20 amIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
20h 55m1 stop Panama City Tocumen Intl
Copa Airlines Logo
1:20 am - 12:32 amPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
24h 12m1 stop Panama City Tocumen Intl
$870Copa Airlines
Mon, Sep 14 - Fri, Sep 25
GOL Logo
6:50 am - 3:35 pmIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
31h 45m2 stops Bogotá El Dorado Sao Paulo Guarulhos Intl
GOL Logo
6:40 pm - 2:15 pmPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
20h 35m2 stops Sao Paulo Guarulhos Intl Bogotá El Dorado
$876GOL
Tue, Sep 15 - Sat, Sep 26
LATAM Airlines Logo
10:05 am - 6:40 amIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
18h 35m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
LATAM Airlines Logo
6:00 pm - 9:11 amPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
17h 11m2 stops Rio de Janeiro–Galeão Intl Atlanta Hartsfield-Jackson
$883LATAM Airlines
Mon, Jan 25 - Fri, Feb 19
LATAM Airlines Logo
10:05 am - 6:40 amIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
18h 35m2 stops Atlanta Hartsfield-Jackson Lima J Chavez Intl
LATAM Airlines Logo
4:05 pm - 11:59 amPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
21h 54m2 stops Sao Paulo Guarulhos Intl Atlanta Hartsfield-Jackson
$885LATAM Airlines
Mon, Jan 25 - Fri, Feb 19
LATAM Airlines Logo
12:25 pm - 2:15 pmIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
24h 50m2 stops New York John F Kennedy Intl Sao Paulo Guarulhos Intl
LATAM Airlines Logo
7:05 pm - 5:46 pmPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
23h 41m2 stops Santiago Arturo Merino Benitez New York John F Kennedy Intl
$889LATAM Airlines
Mon, Sep 21 - Thu, Sep 24
LATAM Airlines Logo
6:30 pm - 9:30 pmIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
25h 00m2 stops New York John F Kennedy Intl Sao Paulo Guarulhos Intl
LATAM Airlines Logo
6:00 pm - 11:52 amPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
19h 52m2 stops Sao Paulo Guarulhos Intl New York John F Kennedy Intl
$892LATAM Airlines
Wed, Jan 13 - Sun, Jan 24
Copa Airlines Logo
1:16 am - 12:25 amIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
21h 09m1 stop Panama City Tocumen Intl
Copa Airlines Logo
1:30 am - 11:33 pmPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
24h 03m1 stop Panama City Tocumen Intl
$895Copa Airlines
Mon, Nov 9 - Sat, Nov 21
Copa Airlines Logo
3:26 pm - 12:35 amIAD  Washington, D.C. Dulles Intl-POA Porto Alegre Salgado Filho
31h 09m1 stop Panama City Tocumen Intl
Copa Airlines Logo
9:00 am - 11:34 pmPOA  Porto Alegre Salgado Filho-IAD Washington, D.C. Dulles Intl
16h 34m1 stop Panama City Tocumen Intl
$895Copa Airlines
Mon, Jan 25 - Fri, Feb 19

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LATAM Airlines flights from Washington, D.C. to Porto Alegre

Our best LATAM Airlines deals on Washington, D.C. to Porto Alegre flight tickets
LATAM Airlines
Sep 21
IAD12:25 pmWashington, D.C. Dulles Intl
24h 50m
2 stops
POA2:15 pmPorto Alegre Salgado Filho
Sep 24
POA7:05 pmPorto Alegre Salgado Filho
23h 41m
2 stops
IAD5:46 pmWashington, D.C. Dulles Intl
$889
LATAM Airlines
Oct 28
IAD12:30 pmWashington, D.C. Dulles Intl
27h 45m
2 stops
POA5:15 pmPorto Alegre Salgado Filho
Nov 1
POA5:40 pmPorto Alegre Salgado Filho
18h 30m
2 stops
IAD10:10 amWashington, D.C. Dulles Intl
$986

United Airlines flights from Washington, D.C. to Porto Alegre

Our best United Airlines deals on Washington, D.C. to Porto Alegre flight tickets
United Airlines
Oct 20
IAD10:35 pmWashington, D.C. Dulles Intl
13h 25m
1 stop
POA1:00 pmPorto Alegre Salgado Filho
Nov 1
POA4:05 pmPorto Alegre Salgado Filho
27h 19m
2 stops
IAD5:24 pmWashington, D.C. Dulles Intl
$1,133
United Airlines
Oct 28
IAD10:25 pmWashington, D.C. Dulles Intl
37h 35m
2 stops
POA1:00 pmPorto Alegre Salgado Filho
Nov 1
POA4:05 pmPorto Alegre Salgado Filho
16h 25m
1 stop
IAD6:30 amWashington, D.C. Dulles Intl
$1,309
United Airlines
Oct 6
IAD10:35 pmWashington, D.C. Dulles Intl
34h 10m
1 stop
POA9:45 amPorto Alegre Salgado Filho
Oct 16
POA3:25 pmPorto Alegre Salgado Filho
32h 34m
2 stops
IAD10:59 pmWashington, D.C. Dulles Intl
$1,439

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 August 14, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Wed 9/23

2:25 am-12:20 am

1 stop20h 55m

Porto Alegre Salgado Filho

Wed 9/30

1:20 am-4:20 am

1 stop28h 00m

$810

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Mon 10/5

2:25 am-12:20 am

1 stop20h 55m

Porto Alegre Salgado Filho

Thu 10/15

1:20 am-4:20 am

1 stop28h 00m

$870

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Mon 9/14

2:25 am-12:20 am

1 stop20h 55m

Porto Alegre Salgado Filho

Fri 9/25

1:20 am-12:32 am

1 stop24h 12m

$870

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Tue 9/15

6:50 am-3:35 pm

2 stops31h 45m

Porto Alegre Salgado Filho

Sat 9/26

6:40 pm-2:15 pm

2 stops20h 35m

$876
Quickest round-trip

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Mon 1/25

10:05 am-6:40 am

2 stops18h 35m

Porto Alegre Salgado Filho

Fri 2/19

6:00 pm-9:11 am

2 stops17h 11m

$883

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Mon 1/25

10:05 am-6:40 am

2 stops18h 35m

Porto Alegre Salgado Filho

Fri 2/19

4:05 pm-11:59 am

2 stops21h 54m

$885

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Mon 9/21

12:25 pm-2:15 pm

2 stops24h 50m

Porto Alegre Salgado Filho

Thu 9/24

7:05 pm-5:46 pm

2 stops23h 41m

$889

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Wed 1/13

6:30 pm-9:30 pm

2 stops25h 00m

Porto Alegre Salgado Filho

Sun 1/24

6:00 pm-11:52 am

2 stops19h 52m

$892

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Mon 11/9

1:16 am-12:25 am

1 stop21h 09m

Porto Alegre Salgado Filho

Sat 11/21

1:30 am-11:33 pm

1 stop24h 03m

$895

Washington, D.C.Porto Alegre

IAD Washington, D.C. Dulles Intl - POA Porto Alegre Salgado Filho

IADPOA

Washington, D.C. Dulles Intl

Mon 1/25

3:26 pm-12:35 am

1 stop31h 09m

Porto Alegre Salgado Filho

Fri 2/19

9:00 am-11:34 pm

1 stop16h 34m

$895

Flights are sorted by cheapest round-trip flights first.

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See travel insights to Porto Alegre from

How to get the cheapest flight ticket from Washington, D.C. to Porto Alegre

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Porto Alegre?

The cheapest month to fly to Porto Alegre from Washington, D.C. is in January. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you’re not able to fly to Porto Alegre in January, then September is your next best option. Flight prices from Washington, D.C. to Porto Alegre during September average around $485.

Can stopping save me money on Washington, D.C. to Porto Alegre flights?

You could potentially save up to 3% on your flight if you consider stops on a Washington, D.C. to Porto Alegre flight.

When to book flights from Washington, D.C. to Porto Alegre

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Porto Alegre according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to Porto Alegre (WAS to POA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Porto Alegre

Fastest flight time

16h 49m

Direct flights

None
The fastest flight from Washington, D.C. to Porto Alegre takes 16h 49m
There are no direct flights from Washington, D.C. to Porto Alegre. There are no popular flight routes from Washington, D.C. to Porto Alegre.
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Frequently asked questions about flying from Washington, D.C. to Porto Alegre

  • How far is Washington, D.C. to Porto Alegre Salgado Filho by plane?

    The straight-line distance from Washington, D.C. to Porto Alegre Salgado Filho is 5041.2 mi. By plane, this route typically takes 16h 49m.

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

    Prices for flights from Washington, D.C. to Porto Alegre Salgado Filho Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington, D.C. to Porto Alegre Salgado Filho Airport?

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. 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 required for your trip to Porto Alegre Salgado Filho Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Porto Alegre Salgado Filho Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Washington, D.C. to Porto Alegre?

Best airlines flying from Washington, D.C. to Porto Alegre

Compare and see reviews for airlines that fly from Washington, D.C. to Porto Alegre with momondo
Airline
Rating
Free Cancellation
Price
Copa AirlinesPriceFrom $485Free CancellationRating
7.6
1,559 reviews
Search Copa Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Porto Alegre?

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

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

Yes. momondo enables you to select and highlight flights to Porto Alegre from Washington, D.C. with this policy.

How can momondo help me find flights from Washington, D.C. to Porto Alegre?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Porto Alegre from Washington, D.C..

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

If you are not ready to book a flight from Washington, D.C. to Porto Alegre now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Porto Alegre and let you know when they change.

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