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Cheap flights from London Heathrow Airport to Porto Alegre from £499

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 16/8. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — POA
11 Jun — 18 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Porto Alegre

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Porto Alegre
Explore the most affordable flight options available from Heathrow to Porto Alegre. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 May 2026.

Wed 27/506:00
LHR
-
POA
2 stops21h 25m
Multiple Airlines
Thu 18/615:55
POA
-
LHR
2 stops27h 00m
Multiple Airlines
Deal found 10/5£839
Fri 5/622:05
LHR
-
POA
2 stops28h 40m
Multiple Airlines
Sun 21/606:00
POA
-
LHR
2 stops30h 15m
Multiple Airlines
Deal found 8/5£854
Mon 1/622:05
LHR
-
POA
2 stops26h 00m
Multiple Airlines
Wed 17/609:45
POA
-
LHR
2 stops31h 50m
Multiple Airlines
Deal found 9/5£863
Tue 19/508:00
LHR
-
POA
1 stop17h 45m
TAP AIR PORTUGAL
Sat 6/601:40
POA
-
LHR
1 stop28h 40m
TAP AIR PORTUGAL
Deal found 11/5£880
Wed 25/1120:15
LHR
-
POA
2 stops21h 30m
LATAM Airlines
Sun 29/1115:00
POA
-
LHR
2 stops20h 05m
LATAM Airlines
Deal found 7/5£887
Thu 21/508:00
LHR
-
POA
1 stop16h 25m
TAP AIR PORTUGAL
Sat 6/601:40
POA
-
LHR
1 stop28h 40m
TAP AIR PORTUGAL
Deal found 10/5£895
Tue 1/1217:50
LHR
-
POA
2 stops33h 50m
Lufthansa
Mon 7/1217:50
POA
-
LHR
2 stops21h 45m
Lufthansa
Deal found 10/5£898
Fri 5/622:05
LHR
-
POA
2 stops28h 40m
Multiple Airlines
Sat 20/606:40
POA
-
LHR
2 stops27h 10m
Multiple Airlines
Deal found 8/5£910

Find flight deals from Heathrow to Porto Alegre

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Porto Alegre (POA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 May 2026.

Round-trip from

£839

One-way from

£499

Popular in

July

Cheapest in

April

Average price

£892
27/5-18/6
  • 27/5-18/6
  • 4 total stops
  • 48h 25m total
  • London to Porto Alegre
Search Deals
16/8
  • 16/8
  • 3 total stops
  • 37h 05m total
  • London to Porto Alegre
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£193 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£25 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow 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, Cheapflights users made 858,174 searches. Data last updated 12 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Porto Alegre that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Fri 5/6

22:05-22:45

2 stops28h 40m

Porto Alegre Salgado Filho

Sun 21/6

12:00-15:05

1 stop23h 05m

£882

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Fri 5/6

21:20-19:05

1 stop25h 45m

Porto Alegre Salgado Filho

Sun 21/6

19:50-15:05

1 stop15h 15m

£1,140

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Thu 1/10

18:40-09:15

2 stops18h 35m

Porto Alegre Salgado Filho

Thu 29/10

15:15-16:40

3 stops22h 25m

£1,148

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Tue 20/10

14:25-09:15

3 stops22h 50m

Porto Alegre Salgado Filho

Tue 3/11

15:15-18:40

3 stops24h 25m

£1,174
Fastest return journey

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Tue 23/6

21:20-10:00

1 stop16h 40m

Porto Alegre Salgado Filho

Tue 30/6

19:50-15:05

1 stop15h 15m

£1,266

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Wed 26/8

07:00-09:15

3 stops30h 15m

Porto Alegre Salgado Filho

Sat 5/9

14:25-16:35

3 stops22h 10m

£1,353

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Tue 23/6

18:40-10:00

2 stops19h 20m

Porto Alegre Salgado Filho

Tue 30/6

14:20-18:30

3 stops24h 10m

£1,448

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 1/6

21:20-09:20

1 stop16h 00m

Porto Alegre Salgado Filho

Sun 30/8

12:10-15:25

2 stops23h 15m

£1,451

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Mon 1/6

18:45-09:20

2 stops18h 35m

Porto Alegre Salgado Filho

Sun 30/8

12:10-15:05

1 stop22h 55m

£1,496
Cheapest one-way

LondonPorto Alegre

LHR - POA

LHRPOA

London Heathrow

Fri 3/7

06:15-00:40

2 stops22h 25m

£767

Flights are sorted by cheapest return flights first.

Deals found on 8/5

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

Best time to book a flight from Heathrow to Porto Alegre

Have a flexible travel schedule? Discover the best time to fly to Porto Alegre from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Porto Alegre

How far ahead should I book a flight from London Heathrow Airport to Porto Alegre?

The price you pay for your flight from London Heathrow Airport to Porto Alegre may vary depending on when you book. For the best chance of a lower fare, look to book 57 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London Heathrow Airport to Porto Alegre?

Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Porto Alegre (average of £760). Flying from London Heathrow Airport to Porto Alegre in July is currently the most expensive (average of £1,347). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost for a return flight from London Heathrow Airport to Porto Alegre?

Reviews of airlines servicing Porto Alegre

Get insights into the airlines that provide service to Porto Alegre. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Porto Alegre. Reviews last updated 12 May 2026.
Check out reviews from past customers who have flown with LATAM Airlines,Virgin Atlantic, andTAP AIR PORTUGAL from London Heathrow Airport to Porto Alegre to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.4
Good
1,921 reviews
Check prices

Boarding

7.5

Comfort

7.3

Overall

7.4

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Victoria E,Mar 2026

SCL - JFK

I was charged $130 to check my baggage from Santiago Chile to New York. It was only one baggage checked and it wasn’t fully the standard size. And then to get hit with $130 was to me not favorable to the airlines. Because on most international travel, they allow one bag to be checked in. So in the future, I would have to think twice about booking Latam again other than that it’s a very good airline.
LATAM Airlines
7.4
Good
1,921 reviews
LATAM Airlines
7.4
Good
1,921 reviews
Check prices

Boarding

7.5

Comfort

7.3

Overall

7.4

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Victoria E,Mar 2026

SCL - JFK

I was charged $130 to check my baggage from Santiago Chile to New York. It was only one baggage checked and it wasn’t fully the standard size. And then to get hit with $130 was to me not favorable to the airlines. Because on most international travel, they allow one bag to be checked in. So in the future, I would have to think twice about booking Latam again other than that it’s a very good airline.
Virgin Atlantic
7.4
Good
688 reviews
LATAM Airlines
7.4
Good
1,921 reviews
Check prices

Boarding

7.5

Comfort

7.3

Overall

7.4

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Victoria E,Mar 2026

SCL - JFK

I was charged $130 to check my baggage from Santiago Chile to New York. It was only one baggage checked and it wasn’t fully the standard size. And then to get hit with $130 was to me not favorable to the airlines. Because on most international travel, they allow one bag to be checked in. So in the future, I would have to think twice about booking Latam again other than that it’s a very good airline.
TAP AIR PORTUGAL
7.2
Good
2,250 reviews
LATAM Airlines
7.4
Good
1,921 reviews
Check prices

Boarding

7.5

Comfort

7.3

Overall

7.4

Food

6.7

Crew

8.0

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Victoria E,Mar 2026

SCL - JFK

I was charged $130 to check my baggage from Santiago Chile to New York. It was only one baggage checked and it wasn’t fully the standard size. And then to get hit with $130 was to me not favorable to the airlines. Because on most international travel, they allow one bag to be checked in. So in the future, I would have to think twice about booking Latam again other than that it’s a very good airline.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Porto Alegre. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Porto Alegre from London Heathrow?

    Porto Alegre Salgado Filho (POA) is the airport you will fly into if you book a flight from London Heathrow to Porto Alegre. You should not have trouble finding flights to Salgado Filho from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 3 airlines have flights to the Porto Alegre airport from London Heathrow. It is only a 4.0 mi journey from Salgado Filho (POA) to Porto Alegre’s city center.

  • How long is the flight from London Heathrow Airport to Porto Alegre?

    For as low as £1,148, LATAM Airlines can have you in Porto Alegre from London Heathrow Airport in 18h 35m. The distance between London Heathrow Airport and Porto Alegre is about 6410 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the cheapest airlines flying from London Heathrow Airport to Porto Alegre round-trip?

    Our cheapest airline available from London Heathrow Airport to Porto Alegre is TAP AIR PORTUGAL. Our recent data shows that you can find tickets from as low as £703 on this airline. Additional options worth looking into are LATAM Airlines and Virgin Atlantic, starting at £739 and £1,173 round-trip. You may be able to fly from London Heathrow Airport to Porto Alegre for 29% less than the average price by searching for these airlines.

  • Can I find deals for flights from Heathrow to Porto Alegre that include hotel bookings?

    Yes. In addition to deals on Heathrow to Porto Alegre flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Porto Alegre?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Porto Alegre.

  • Can I find deals for business class flights from Heathrow to Porto Alegre?

    Yes. Cheapflights offers flight deals from Heathrow to Porto Alegre by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Porto Alegre?

    Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Porto Alegre (average of £760). Flying from London Heathrow Airport to Porto Alegre in July is currently the most expensive (average of £1,347). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Heathrow to Porto Alegre

See prices for flight routes from nearby airports that may be better suited for you.
Gatwick to Porto Alegre flights

Top 3 airlines flying from Heathrow to Porto Alegre

Discover the top 3 airlines that operate flights from Heathrow to Porto Alegre. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 12 May 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest£703Average£869FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
LATAM AirlinesCheapest£739Average£1,010FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights
Virgin AtlanticCheapest£1,173Average£1,560FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to Porto Alegre?

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Why should you use Cheapflights to find cheap flight tickets from Heathrow to Porto Alegre?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Heathrow to Porto Alegre.

Can Cheapflights find flights from Heathrow to Porto Alegre with no change fees?

Certainly. Search results for flights to Porto Alegre from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Heathrow to Porto Alegre become cheaper?

Of course! You can now track prices for flights from Heathrow to Porto Alegre and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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