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Cheap flights from Porto Alegre to London Heathrow Airport from £419

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 30/3. Fares are subject to change and may not be available on all flights or dates of travel.
POA — LHR
19 Jan — 26 Jan1
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 20 December 2025.

Thu 25/1214:05POA - LHR
2 stops21h 00mLATAM Airlines
Wed 7/120:15LHR - POA
1 stop20h 50mLATAM Airlines
Deal found 18/12£643
Fri 19/1217:55POA - LHR
2 stops20h 10mMultiple Airlines
Fri 26/1218:40LHR - POA
2 stops19h 55mMultiple Airlines
Deal found 19/12£855
Fri 19/1218:15POA - LHR
2 stops19h 50mMultiple Airlines
Sun 28/1207:30LHR - POA
2 stops31h 05mMultiple Airlines
Deal found 19/12£872
Fri 19/1214:50POA - LHR
3 stops27h 35mSWISS
Fri 26/1218:40LHR - POA
2 stops19h 55mSWISS
Deal found 19/12£889
Wed 24/1219:20POA - LHR
2 stops23h 05mGOL
Mon 19/114:45LHR - POA
2 stops37h 00mGOL
Deal found 19/12£920
Mon 22/1211:40POA - LHR
2 stops23h 10mGOL
Wed 14/109:00LHR - POA
2 stops26h 40mGOL
Deal found 20/12£938
Sun 21/1218:25POA - LHR
2 stops19h 10mGOL
Sun 28/1206:30LHR - POA
2 stops21h 20mGOL
Deal found 19/12£940
Wed 24/1212:30POA - LHR
2 stops19h 15mMultiple Airlines
Mon 19/117:10LHR - POA
2 stops21h 25mMultiple Airlines
Deal found 18/12£986

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 20 December 2025.

Round-trip from

£661

One-way from

£419

Popular in

December

Cheapest in

February

Average price

£1,037
LATAM Airlines
  • LATAM Airlines
  • 10/3-31/3
  • 2 total stops
  • 30h 50m total
  • Porto Alegre to London
Search Deals
Avianca
  • Avianca
  • 30/3
  • 2 total stops
  • 41h 05m total
  • Porto Alegre to London
Search Deals
Highest demand for flights based on searches. 7% potential increase in price (£50 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
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 20 December 2025.
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

Thu 26/2

00:45-21:35

1 stop17h 50m

London Heathrow

Sat 18/4

08:00-22:40

1 stop18h 40m

£672

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 12/3

00:45-21:35

1 stop17h 50m

London Heathrow

Thu 16/4

08:00-20:25

1 stop16h 25m

£673

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Sun 1/2

11:40-16:35

2 stops25h 55m

London Heathrow

Thu 26/2

06:30-16:30

2 stops37h 00m

£727

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Fri 13/3

14:55-14:05

2 stops20h 10m

London Heathrow

Thu 16/4

21:20-14:45

2 stops21h 25m

£739

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Fri 13/3

17:55-14:05

1 stop17h 10m

London Heathrow

Sun 19/4

21:20-11:50

1 stop18h 30m

£740

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 26/2

00:45-22:40

1 stop18h 55m

London Heathrow

Fri 6/3

18:30-19:40

1 stop28h 10m

£777

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Tue 31/3

00:15-22:55

1 stop18h 40m

London Heathrow

Thu 30/4

06:00-20:25

1 stop18h 25m

£797

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Tue 5/5

17:50-15:05

1 stop17h 15m

London Heathrow

Mon 25/5

21:20-11:35

1 stop18h 15m

£800

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Mon 18/5

15:25-08:35

2 stops37h 10m

£429

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Mon 16/3

15:25-06:30

2 stops36h 05m

£430

Flights are sorted by cheapest return flights first.

Deals found on 19/12

Showing 1-10 of 17 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 12 December 2025.

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 £178). 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.

What is the cheapest time of day to fly from POA to LHR?

Find hourly flight availability from Porto Alegre to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 20 December 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 23% on flights from Porto Alegre to London Heathrow Airport by exploring options for tickets in the morning.

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

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 20 December 2025.
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
1,893 reviews
Check prices

Comfort

7.3

Crew

8.0

Entertainment

7.0

Boarding

7.6

Overall

7.5

Food

6.7

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing
LATAM Airlines
7.5
Good
1,893 reviews
LATAM Airlines
7.5
Good
1,893 reviews
Check prices

Comfort

7.3

Crew

8.0

Entertainment

7.0

Boarding

7.6

Overall

7.5

Food

6.7

Reviews

1 / 20
4.0
Okay

Murilo,Jun 2025

SFO - LAX

I had mixed feelings regarding this flight. Called several times Latam and Delta regarding the purchase of checked baggage and price. I was told 80 dollars, could not buy it ahead of time,, they told me it was not Possible, that I had to buy at the airport. Check in my luggage the attendant says 80 dollars but I was charged 200 . No one could get me a solid answer why. Very disappointing

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, GOL, and LATAM Airlines can get you from Porto Alegre to London Heathrow Airport in just under 17h 50m. Your travel time can differ by up to 8h 05m. 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 28% 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 £178). 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?

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Gatwick
Wembley
Ilford
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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 20 December 2025.
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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