SFO - POA

$325 Find Cheap Flights from San Francisco to Porto Alegre

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Francisco to Porto Alegre departing on 8/10. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

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

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Porto Alegre, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Francisco to Porto Alegre, as well as popular online travel agencies
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Flights Deals

Cheap Flights from San Francisco to Porto Alegre (SFO-POA)

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

Recent round-trip flight deals from San Francisco to Porto Alegre

Sat, Sep 13 - Sat, Sep 20
United Airlines Logo
4:55 pm - 2:35 pmSFO-POA
41h 40m2 stops
United Airlines Logo
11:30 am - 11:13 amPOA-SFO
27h 43m2 stops
$675United Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
United Airlines Logo
5:00 am - 3:05 pmSFO-POA
30h 05m2 stops
United Airlines Logo
3:25 pm - 8:56 amPOA-SFO
45h 31m2 stops
$690United Airlines
Find Deal
Sat, Sep 20 - Sat, Sep 27
LATAM Airlines Logo
6:15 am - 6:25 amSFO-POA
20h 10m2 stops
LATAM Airlines Logo
7:20 am - 10:30 amPOA-SFO
31h 10m2 stops
$807LATAM Airlines
Find Deal
Fri, Sep 19 - Fri, Sep 26
Copa Airlines Logo
1:30 am - 12:20 amSFO-POA
18h 50m1 stop
Copa Airlines Logo
1:27 am - 11:25 pmPOA-SFO
25h 58m1 stop
$853Copa Airlines
Find Deal
Sat, Sep 13 - Fri, Sep 19
Copa Airlines Logo
10:55 am - 12:20 amSFO-POA
33h 25m1 stop
Copa Airlines Logo
1:27 am - 11:25 pmPOA-SFO
25h 58m1 stop
$914Copa Airlines
Find Deal
Fri, Sep 12 - Sat, Sep 20
 Logo
1:30 am - 12:20 amSFO-POA
18h 50m1 stop
 Logo
5:20 am - 11:09 pmPOA-SFO
21h 49m2 stops
$1,036
Find Deal
Fri, Sep 12 - Sat, Sep 20
 Logo
12:05 am - 7:40 amSFO-POA
27h 35m3 stops
 Logo
5:40 pm - 10:45 pmPOA-SFO
33h 05m3 stops
$1,053
Find Deal
Thu, Dec 25 - Sat, Jan 10
GOL Logo
1:36 pm - 6:40 pmSFO-POA
48h 04m2 stops
GOL Logo
5:55 pm - 9:06 amPOA-SFO
20h 11m2 stops
$1,658GOL
Find Deal
Thu, Dec 25 - Fri, Jan 9
GOL Logo
10:21 am - 4:30 pmSFO-POA
25h 09m2 stops
GOL Logo
4:30 am - 11:51 amPOA-SFO
36h 21m2 stops
$1,868GOL
Find Deal
Wed, Aug 27 - Wed, Sep 24
LATAM Airlines Logo
6:15 am - 6:25 amSFO-POA
20h 10m2 stops
LATAM Airlines Logo
4:40 am - 10:30 amPOA-SFO
33h 50m3 stops
$2,361LATAM Airlines
Find Deal
Booking Insights

KAYAK's insights & trends for San Francisco to Porto Alegre flights

Get data-powered insights and trends into flights from San Francisco to Porto Alegre to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from San Francisco to Porto Alegre?

The average price of all round-trip flights from San Francisco to Porto Alegre clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from San Francisco to Porto Alegre, look for departures on Wednesdays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Porto Alegre, Thursday is the cheapest day to fly and Saturday is the most expensive.

What is the cheapest month to fly from San Francisco to Porto Alegre?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Francisco to Porto Alegre, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Francisco to Porto Alegre is August, where tickets cost $644 (return) on average. On the other hand, the most expensive months are December and September, where the average cost of round-trip tickets is $1,759 and $1,337 respectively.

Good to know

Low seasonMarch
Cheapest flight$325
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 20% lower on average.
Flight from San Francisco to Porto Alegre

When to book flights from San Francisco to Porto Alegre

Are your dates flexible? Find out the best times to travel from San Francisco 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.

FAQs for booking flights from San Francisco to Porto Alegre

  • What is the cheapest flight from San Francisco to Porto Alegre?

    In the last 3 days, the lowest price for a flight from San Francisco to Porto Alegre was $325 for a one-way ticket and $675 for a round-trip.

  • Do I need a passport to fly between San Francisco and Porto Alegre?

    Yes, you'll most likely have to show a valid passport before boarding the plane in San Francisco and on arrival in Porto Alegre.

  • Which airports will I be using when flying from San Francisco to Porto Alegre?

    When flying out of San Francisco you will be using San Francisco. You will be landing at Porto Alegre, also known as Porto Alegre Salgado Filho.

  • Which aircraft models fly most regularly from San Francisco to Porto Alegre?

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

  • Which airline alliances offer flights from San Francisco to Porto Alegre?

    Star Alliance, and SkyTeam are the airline alliances operating flights between San Francisco and Porto Alegre, with Star Alliance being the most commonly used for this route.

  • Which is the best airline for flights from San Francisco to Porto Alegre, Copa Airlines or United Airlines?

    The two airlines most popular with KAYAK users for flights from San Francisco to Porto Alegre are Copa Airlines and United Airlines. With an average price for the route of $790 and an overall rating of 7.5, Copa Airlines is the most popular choice. United Airlines is also a great choice for the route, with an average price of $694 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from San Francisco 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 San Francisco to Porto Alegre.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Porto Alegre from San Francisco 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 San Francisco 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 San Francisco with another airline. Booking your flights between San Francisco 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 San Francisco 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 San Francisco up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from San Francisco to Porto Alegre

 
See real verified KAYAK customer reviews for airlines flying from San Francisco to Porto Alegre. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Francisco to Porto Alegre? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
Copa AirlinesOverall score based on 1493 reviews
7.4Comfort
7.8Boarding
6.8Food
8.1Crew
6.8Entertainment
Airline reviews

the food served was an embarrassment. No connection for charging the cellphone... What a crappy airline.

2.0 MediocreAnonymous, Jul 2025ASU - PTY
Read more Copa Airlines reviews

the food served was an embarrassment. No connection for charging the cellphone... What a crappy airline.

The flighr attandants were very rude they ignored me didnt offer me anything to drink throughoit the 4 hour flight i feel i was targeted and ignored because i was a darkskin latino man.

Very happy with my flight. I would definitely recommend it.

Did upgrade, travel in business it was great (more room I could sleep)

We paid extra with copa for seats near one another The plane was changed and we lost our seats We were all Separated. We have not received a refund for our seats despite emailing and calling.

We had a five hour layover in the way home from Colombia. I read the "bout your flight" email carefully before we checked bags. We had to go through security right at the gate. Almost lost our ground coffee because that airport only allows 16 ounce of coffee and we had 18. I've been to 48 countries and never heard of a coffee restriction. I can't follow a rule I don't know about. I requested they bring our coffee to our checked luggage. Instead tey gate checked our bag for free. Back to planning transfers in Dallas I guess

Tell people to remain in their seats during the meal/beverage distribution. Enforce boarding by group numbers. No one was checking. Tell people to turn their electronics speakers off. Bigger cups for drinks.

Placed us in the last rear row of the plane so could not recline seats because of the rear wall, and also made it more of a tight space when the passenger in front reclined their seat. While understand seat assignments, every passenger should be afforded a reclining seat. The odor control scent from the restrooms was overwhelming strong. My wife and I could not deal with it, and she suffered a terrible headache as a result. I kept getting hit by the crew since I was on the ilse seat. No apologies, nothing. They made me feel like I was supposed to take the beating for a 3 hr flight.

There was no individual at the front check in when I arrived. I waited for at least 15 minutes and walked around asking security/janitors if they could help and they did not have a solution. So I had to take my checked bag through security and they threw away some of my items. I ended up making it to the gate only a few minutes before it closed due to my waiting for an agent at check in.

It would have been better if they don't separate families in seating. We were seated in the aile row in the middle of a family of four. It would have been better if they they seat the family of four together than separated.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

Everything was great. Only thing that could’ve made it better was buy on board options for hot food, but the snacks were decent. The flight attendants were great. I had no complaints. I was able to make it to my destination safely

Horrific. They missed my connecting flight to San Diego. I didn’t get there until Monday at 9am when I had a mandatory court settlement conference scheduled at 6am since we had parties on the east coast. This caused many issues. All because United apparently forgot to hold the doors open until my flight landed that only had a 10 minute delay. This was the last flight to Southern California. So I couldn’t even rent a car to finish the trip. United cannot be trusted when traveling on specific days and times since weather didn’t have anything to do with the delays.

Very comfortable (upgraded to business class). The audio on my screen didn’t work, but I managed to play the audio through my phone while watching the screen.

Flight was late as pilot crew had to land at different airport in their previous flight. Passengers boarded and had to wait for pilots inside plane. Series of incomplete and unnecessary announcements by an annoying voice, rather than complete, informative announcements.

Breakfast was not loaded at SFO due to catering company change. Seems like a major airline at a major hub would have thought of something else or warned passengers to pick up food before boarding a 3 hour flight.

Boarding seemed to be organized bedlam. For what ever reason, preboarding took longer than 20 minutes. Made the plane 20 minutes late taking off. Luckily we arrived on time. Flight crew seemed very friendly. Only slight turbulence.

They hired a new catering company the same day of my flight. They botched the job by not delivering the right carts and after THREE HOURS waiting, the flight crew timed out (flight was 19 hours long and FAA rules state crew can’t work more than 14 hours long). So they CANCELED OUR FLIGHT!! Worst experience ever. Avoid UAL at all costs.

The personnel were professional and friendly. The Boeing 737 Max 9 is too claustrophobic and was very warm at both airport gates, and still warm in the air.

Our flight was 1.5 hours delayed. There was no weather for the inbound flight, so I don't understand why. This meant a VERY late arrival and only a quick nap before my morning flight.

Delayed flight, so I switched fights to SFO to Phoenix , Phoenix to DSM. Excellent service through American Airlines

AA re-routed flight from HNL to LAX due to delay. My group of 3 with reserved seats in row 9 was broken up, with one assigned to a middle seat, another in the last row of the plane. Not happy. No explanation to the delay. No apologies. No compensation. Would have been nice to be offered an Admiral Club admission or a voucher for the extra 3 hours of layover in LAX. Could not hear the boarding gate announcements in LAX. Adjacent gate was boarding at the same time. Loud speakers were competing against each other. Barely made my boarding group.

Almost a 6 hour flight and the only food option is a cheese plate… and chips. Also how is it there are no options for texting on American. I’ll be going back to delta and united.

Bad food, small seats that didn’t recline. I thought I was buying a quantas ticket so I feel like I got scammed

The chair cushions may need an upgrade. I have been noticing they are so worn out, thin so you’d sit in a dip 😄. Other than that, all was an enjoyable trip. Thanks AA!

Cramped seats. FAA should make airlines have more legroom, for even short people complain

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

Eventless. It was a good flight and good crew. Can’t complaint.

Very helpful ground crew after an earlier flight delay and being rebooked on a different flight.

Everything you need to know for your flight from San Francisco to Porto Alegre

Information on your arrival and departure airports

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