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Cheap flights from Porto Alegre to London Heathrow Airport from £367

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
POA — LHR
18 Feb — 25 Feb1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Porto Alegre to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Porto Alegre (POA) to Heathrow (LHR). 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 19 January 2026.

Round-trip from

£367

Popular in

January

Cheapest in

February

Average price

£1,167
10/7-20/7
  • 10/7-20/7
  • 4 total stops
  • 50h 50m total
  • Porto Alegre to London
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Highest demand for flights based on searches. 9% potential increase in price (£66 potential increase over avg. return price).
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Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).
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Average for round-trip flights in January 2026
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Find flight deals from Porto Alegre to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Porto Alegre to Heathrow
Explore the most affordable flight options available from Porto Alegre to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 19 January 2026.

Fri 10/716:15
POA
-
LHR
2 stops22h 20m
Multiple Airlines
Mon 20/709:00
LHR
-
POA
2 stops28h 30m
Multiple Airlines
Deal found 18/1£367
Tue 5/518:25
POA
-
LHR
2 stops17h 50m
Multiple Airlines
Mon 25/508:40
LHR
-
POA
2 stops19h 15m
Multiple Airlines
Deal found 18/1£377
Tue 12/518:25
POA
-
LHR
2 stops17h 50m
Multiple Airlines
Tue 19/508:55
LHR
-
POA
2 stops28h 35m
Multiple Airlines
Deal found 18/1£383
Sun 28/616:15
POA
-
LHR
2 stops22h 20m
Multiple Airlines
Tue 22/908:40
LHR
-
POA
2 stops19h 15m
Multiple Airlines
Deal found 18/1£450
Fri 27/213:40
POA
-
LHR
2 stops21h 05m
Multiple Airlines
Thu 16/408:40
LHR
-
POA
2 stops19h 40m
Multiple Airlines
Deal found 18/1£652
Wed 4/320:10
POA
-
LHR
1 stop14h 55m
LATAM Airlines
Wed 11/320:15
LHR
-
POA
1 stop18h 20m
LATAM Airlines
Deal found 18/1£654
Thu 12/320:10
POA
-
LHR
1 stop14h 55m
LATAM Airlines
Sun 22/320:15
LHR
-
POA
1 stop18h 20m
LATAM Airlines
Deal found 17/1£663
Mon 2/217:55
POA
-
LHR
2 stops37h 35m
Multiple Airlines
Tue 10/217:05
LHR
-
POA
2 stops27h 45m
Multiple Airlines
Deal found 18/1£672
Tue 10/320:10
POA
-
LHR
1 stop14h 55m
LATAM Airlines
Tue 31/321:20
LHR
-
POA
1 stop15h 30m
LATAM Airlines
Deal found 17/1£681
Sun 1/212:50
POA
-
LHR
2 stops24h 45m
Multiple Airlines
Sat 7/206:20
LHR
-
POA
2 stops30h 15m
Multiple Airlines
Deal found 18/1£682
Tue 20/109:20
POA
-
LHR
2 stops25h 25m
Multiple Airlines
Sat 31/117:35
LHR
-
POA
2 stops20h 25m
Multiple Airlines
Deal found 18/1£688

Cheapflights Fare Finder

 
Customise your flight search to find flights from Porto Alegre to Heathrow 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 19 January 2026.
Use the filters below to find and compare flights from Porto Alegre to London Heathrow Airport that are best for you.

Fly from

Porto Alegre

Fly to

Heathrow

Route

Depart

Return

Price

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Fri 6/2

17:55-16:05

3 stops43h 10m

London Heathrow

Tue 3/3

09:00-13:00

2 stops31h 00m

£725

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 26/2

00:45-21:35

1 stop17h 50m

London Heathrow

Fri 17/4

18:45-22:40

1 stop31h 55m

£798

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Tue 10/3

13:40-13:50

2 stops21h 10m

London Heathrow

Tue 31/3

19:45-00:20

2 stops32h 35m

£808

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 12/3

00:45-22:40

1 stop18h 55m

London Heathrow

Tue 17/3

06:00-19:40

1 stop16h 40m

£840

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Fri 6/2

17:55-14:05

1 stop17h 10m

London Heathrow

Tue 3/3

06:55-08:45

2 stops28h 50m

£844

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Sun 3/5

12:10-15:05

1 stop22h 55m

London Heathrow

Sat 9/5

21:20-11:15

1 stop17h 55m

£850

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Tue 30/6

00:15-22:00

1 stop17h 45m

London Heathrow

Wed 30/9

19:50-20:25

1 stop28h 35m

£852

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 16/4

14:25-18:55

2 stops24h 30m

London Heathrow

Sun 3/5

21:20-09:15

1 stop15h 55m

£861

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 14/5

09:20-15:35

2 stops26h 15m

£374

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Mon 13/7

20:05-15:05

1 stop15h 00m

£454

Flights are sorted by cheapest return flights first.

Deals found on 18/1

Showing 1-10 of 14 results
1
2

Best time to book a flight from Porto Alegre to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Porto Alegre 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 Porto Alegre to London Heathrow Airport

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

Use this chart to determine the optimal time to book a return flight from Porto Alegre to Heathrow. Price data was last updated on 16 January 2026.

The best time to book flights from Porto Alegre to London Heathrow Airport is 36 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Porto Alegre to London Heathrow Airport (average of £124). Flying from Porto Alegre to London Heathrow Airport in September is currently the most expensive (average of £849). 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.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated 19 January 2026.
Check out reviews from past customers who have flown with LATAM Airlines from Porto Alegre to London Heathrow Airport 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
7.5
Good
1,910 reviews
Check prices

Crew

8.0

Overall

7.5

Comfort

7.3

Food

6.7

Boarding

7.6

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

JC,Jan 2026

FLN - GRU

Plane was late in FLN and missed connection in GRU. No alternative was given to me until 6 hours later and I was delayed by over 12 hours total.
LATAM Airlines
7.5
Good
1,910 reviews
LATAM Airlines
7.5
Good
1,910 reviews
Check prices

Crew

8.0

Overall

7.5

Comfort

7.3

Food

6.7

Boarding

7.6

Entertainment

7.0

Reviews

1 / 20
2.0
Mediocre

JC,Jan 2026

FLN - GRU

Plane was late in FLN and missed connection in GRU. No alternative was given to me until 6 hours later and I was delayed by over 12 hours total.

Related info for your journey

Find useful and relevant information for your journey from Porto Alegre to Heathrow. 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 from for flights from Porto Alegre to London Heathrow?

    Located just 4.0 mi from the city center, Porto Alegre Salgado Filho is the airport most travelers will use when flying to London Heathrow from Porto Alegre. Booking flights from Salgado Filho (POA) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 1 airline.

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

    GOL and TAP AIR PORTUGAL can get you from Porto Alegre to London Heathrow Airport in just under 17h 50m. Your travel time can differ by up to 25h 20m. Airlines will cover a distance of 6410 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • What is the cheapest airline to fly from Porto Alegre to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from Porto Alegre to London Heathrow Airport round-trip from £606. LATAM Airlines is 30% cheaper than the average price of flights available within the next 90 days to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Porto Alegre to Heathrow 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 Porto Alegre to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Porto Alegre to London Heathrow Airport (average of £124). Flying from Porto Alegre to London Heathrow Airport in September is currently the most expensive (average of £849). 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

Travelling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Luton
Croydon
Northampton
Wembley
Gatwick
Slough
Hounslow
Ilford
Brentford
Hayes
Colchester
Watford
Swindon
Crawley
Bedford
Kingston upon Thames
Chelmsford
Eastbourne
Romford

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Porto Alegre to Heathrow

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

Top airline flying from Porto Alegre to Heathrow

Discover the top airline that operate flights from Porto Alegre to Heathrow. 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 19 January 2026.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest£606Average£812FlexibilityNo cancel feeOn-time81%
Search LATAM Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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

Cheapflights makes it easy to find Porto Alegre to Heathrow flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Porto Alegre.

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

Certainly. Search results for flights to Heathrow from Porto Alegre 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 Porto Alegre to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on Porto Alegre to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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