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Cheap flights from Porto Alegre to London Heathrow Airport from £436

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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
POA — LHR
3 Apr — 10 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap 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 4 March 2026.

Thu 7/520:05
POA
-
LHR
1 stop15h 00m
LATAM Airlines
Mon 18/521:20
LHR
-
POA
2 stops19h 50m
LATAM Airlines
Deal found 27/2£672
Wed 20/521:40
POA
-
LHR
2 stops37h 25m
LATAM Airlines
Tue 26/521:20
LHR
-
POA
1 stop16h 00m
LATAM Airlines
Deal found 3/3£674
Fri 5/615:00
POA
-
LHR
1 stop20h 05m
LATAM Airlines
Fri 19/621:20
LHR
-
POA
1 stop15h 55m
LATAM Airlines
Deal found 3/3£677
Sat 28/321:10
POA
-
LHR
1 stop21h 45m
TAP AIR PORTUGAL
Fri 10/419:50
LHR
-
POA
1 stop30h 50m
TAP AIR PORTUGAL
Deal found 27/2£694
Tue 31/310:00
POA
-
LHR
2 stops29h 40m
LATAM Airlines
Tue 7/421:20
LHR
-
POA
2 stops23h 35m
LATAM Airlines
Deal found 3/3£698
Sun 29/306:45
POA
-
LHR
1 stop28h 20m
LATAM Airlines
Sun 5/421:20
LHR
-
POA
1 stop27h 40m
LATAM Airlines
Deal found 28/2£714
Thu 2/421:55
POA
-
LHR
1 stop16h 55m
TAP AIR PORTUGAL
Mon 6/419:50
LHR
-
POA
1 stop29h 55m
TAP AIR PORTUGAL
Deal found 28/2£728
Mon 2/1114:00
POA
-
LHR
2 stops20h 50m
Multiple Airlines
Mon 9/1106:20
LHR
-
POA
2 stops20h 35m
Multiple Airlines
Deal found 28/2£744
Sun 25/1014:00
POA
-
LHR
2 stops20h 50m
Multiple Airlines
Mon 16/1106:20
LHR
-
POA
2 stops20h 20m
Multiple Airlines
Deal found 3/3£747
Tue 10/321:10
POA
-
LHR
1 stop17h 20m
TAP AIR PORTUGAL
Tue 31/308:00
LHR
-
POA
1 stop17h 45m
TAP AIR PORTUGAL
Deal found 1/3£749

Find 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 4 March 2026.

Round-trip from

£672

One-way from

£436

Popular in

January

Cheapest in

November

Average price

£791
LATAM Airlines
  • LATAM Airlines
  • 7/5-18/5
  • 3 total stops
  • 34h 50m total
  • Porto Alegre to London
Search Deals
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 10/8
  • 1 total stop
  • 29h 20m total
  • Porto Alegre to London
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£65 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

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 4 March 2026.
Use the filters below to find and compare flights from Porto Alegre to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 9/4

21:55-22:55

1 stop21h 00m

London Heathrow

Sat 18/4

08:00-22:40

1 stop18h 40m

£871

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Wed 5/8

08:25-09:40

2 stops21h 15m

London Heathrow

Mon 17/8

16:30-09:05

2 stops20h 35m

£878

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Fri 31/7

08:25-15:40

2 stops27h 15m

London Heathrow

Sun 16/8

16:30-22:45

2 stops34h 15m

£880

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Mon 18/5

14:20-18:30

3 stops24h 10m

London Heathrow

Mon 25/5

07:00-09:15

3 stops30h 15m

£903

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 30/7

10:30-09:40

2 stops19h 10m

London Heathrow

Mon 10/8

16:30-09:45

2 stops21h 15m

£982

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Tue 30/6

00:15-10:20

1 stop30h 05m

London Heathrow

Wed 30/9

19:50-20:25

1 stop28h 35m

£988

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Wed 15/4

18:15-17:35

2 stops19h 20m

London Heathrow

Wed 22/4

08:40-00:20

2 stops19h 40m

£995

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Wed 22/4

12:25-16:35

3 stops24h 10m

London Heathrow

Tue 5/5

07:00-09:15

3 stops30h 15m

£1,035

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Tue 7/4

21:05-09:40

2 stops32h 35m

London Heathrow

Wed 3/6

16:30-22:45

2 stops34h 15m

£1,080

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Sun 3/5

18:30-17:35

2 stops19h 05m

London Heathrow

Sat 9/5

06:30-23:55

2 stops21h 25m

£1,103

Flights are sorted by cheapest return flights first.

Deals found on 27/2

Showing 1-10 of 17 resultsSorted by cheapest first
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 27 February 2026.

The best time to book flights from Porto Alegre to London Heathrow Airport is 14 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 £122). Flying from Porto Alegre to London Heathrow Airport in September is currently the most expensive (average of £851). 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 4 March 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
7.4
Good
1,916 reviews
Check prices

Boarding

7.5

Overall

7.4

Crew

8.0

Entertainment

7.0

Comfort

7.3

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Jess,Jan 2026

GRU - MIA

sat on the tarmac for 4.5 hours with no explanation, climate control, honesty about the timeline or the situation, or even letting anyone off. The crew was passive-aggressive and sneaky, trying to skirt legal time limits requiring financial restitution for passengers, pretending the "flight had started" even though they didn't budge for another 40 minutes. One of the worst flights I've ever taken
LATAM Airlines
7.4
Good
1,916 reviews
LATAM Airlines
7.4
Good
1,916 reviews
Check prices

Boarding

7.5

Overall

7.4

Crew

8.0

Entertainment

7.0

Comfort

7.3

Food

6.7

Reviews

1 / 20
2.0
Mediocre

Jess,Jan 2026

GRU - MIA

sat on the tarmac for 4.5 hours with no explanation, climate control, honesty about the timeline or the situation, or even letting anyone off. The crew was passive-aggressive and sneaky, trying to skirt legal time limits requiring financial restitution for passengers, pretending the "flight had started" even though they didn't budge for another 40 minutes. One of the worst flights I've ever taken

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?

    TAP AIR PORTUGAL, ITA Airways, and SWISS can get you from Porto Alegre to London Heathrow Airport in just under 21h. Your travel time can differ by up to 6h 15m. 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 £767. LATAM Airlines is 12% 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 £122). Flying from Porto Alegre to London Heathrow Airport in September is currently the most expensive (average of £851). 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
Croydon
Wembley
Northampton
Luton
Gatwick
Slough
Hounslow
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Eastbourne
Chelmsford
Ipswich
Swindon
Bedford

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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 4 March 2026.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest£767Average£827FlexibilityNo 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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