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Cheap flights from Porto Alegre to London from £140

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 16/3. Fares are subject to change and may not be available on all flights or dates of travel.
POA — LON
29 Mar — 5 Apr1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Porto Alegre to London

Enter your travel dates to find the best prices.

Cheapest flights from Porto Alegre to London
Explore the most affordable flight options available from Porto Alegre to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 February 2026.

Sat 25/417:40
POA
-
LHR
1 stop17h 25m
LATAM Airlines
Mon 11/506:15
LHR
-
POA
2 stops22h 25m
LATAM Airlines
Deal found 23/2£651
Thu 7/515:30
POA
-
LHR
2 stops19h 35m
LATAM Airlines
Fri 29/521:20
LHR
-
POA
2 stops23h 35m
LATAM Airlines
Deal found 25/2£654
Thu 7/515:30
POA
-
LHR
2 stops19h 35m
LATAM Airlines
Mon 18/521:20
LHR
-
POA
1 stop20h 55m
LATAM Airlines
Deal found 25/2£655
Thu 7/515:00
POA
-
LHR
1 stop20h 05m
LATAM Airlines
Tue 26/521:20
LHR
-
POA
1 stop15h 55m
LATAM Airlines
Deal found 26/2£656
Wed 6/513:40
POA
-
LHR
1 stop21h 25m
LATAM Airlines
Fri 29/521:20
LHR
-
POA
2 stops23h 35m
LATAM Airlines
Deal found 25/2£662
Wed 6/513:40
POA
-
LHR
1 stop21h 25m
LATAM Airlines
Mon 1/621:20
LHR
-
POA
1 stop17h 55m
LATAM Airlines
Deal found 25/2£662
Mon 25/520:05
POA
-
LHR
1 stop15h 00m
LATAM Airlines
Tue 16/621:20
LHR
-
POA
1 stop20h 55m
LATAM Airlines
Deal found 26/2£663
Wed 8/414:25
POA
-
LHR
1 stop20h 40m
LATAM Airlines
Thu 23/421:20
LHR
-
POA
1 stop15h 30m
LATAM Airlines
Deal found 24/2£696
Mon 2/317:45
POA
-
LHR
2 stops17h 05m
GOL
Thu 19/306:30
LHR
-
POA
2 stops19h 40m
GOL
Deal found 24/2£703
Wed 1/420:45
POA
-
LHR
1 stop14h 20m
LATAM Airlines
Wed 8/421:20
LHR
-
POA
1 stop18h 20m
LATAM Airlines
Deal found 23/2£719
Tue 9/618:25
POA
-
LHR
2 stops17h 50m
GOL
Thu 18/608:55
LHR
-
POA
2 stops18h 45m
GOL
Deal found 24/2£725
Tue 12/518:25
POA
-
LCY
2 stops18h 15m
KLM
Tue 19/510:00
LCY
-
POA
2 stops17h 55m
KLM
Deal found 24/2£799

Find flight deals from Porto Alegre to London

Discover tips and strategies to find the most affordable flight options for your journey from Porto Alegre (POA) to London (LON). 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 27 February 2026.

Round-trip from

£651

One-way from

£140

Popular in

July

Cheapest in

November

Average price

£712
LATAM Airlines
  • LATAM Airlines
  • 25/4-11/5
  • 3 total stops
  • 39h 50m total
  • Porto Alegre to London
Search Deals
LATAM Airlines
  • LATAM Airlines
  • 16/3
  • 1 total stop
  • 14h 55m total
  • Porto Alegre to London
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£59 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£10 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Porto Alegre to London 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 27 February 2026.
Use the filters below to find and compare flights from Porto Alegre to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 12/3

00:45-21:35

1 stop17h 50m

London Heathrow

Thu 16/4

06:00-20:25

1 stop18h 25m

£783

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Fri 5/6

18:25-16:15

2 stops17h 50m

London Heathrow

Fri 19/6

08:40-23:55

2 stops19h 15m

£858

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Thu 9/4

21:55-17:45

1 stop15h 50m

London Heathrow

Sat 18/4

06:00-22:40

1 stop20h 40m

£860

Porto AlegreLondon

POA - LCY

POALCY

Porto Alegre Salgado Filho

Sat 14/3

16:55-16:10

2 stops20h 15m

London City

Sat 21/3

11:30-13:05

2 stops28h 35m

£910

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Wed 22/4

17:10-06:45

2 stops33h 35m

London Heathrow

Sat 9/5

15:20-15:25

2 stops28h 05m

£926

Porto AlegreLondon

POA - LHR

POALHR

Porto Alegre Salgado Filho

Fri 13/3

13:40-14:25

2 stops21h 45m

London Heathrow

Thu 16/4

06:15-00:20

2 stops22h 05m

£940

Porto AlegreLondon

POA - LGW

POALGW

Porto Alegre Salgado Filho

Thu 12/3

09:45-20:40

2 stops31h 55m

London Gatwick

Mon 16/3

21:25-19:40

2 stops25h 15m

£940

Porto AlegreLondon

POA - LCY

POALCY

Porto Alegre Salgado Filho

Tue 21/4

18:15-17:20

2 stops19h 05m

London City

Tue 12/5

08:25-23:55

2 stops19h 30m

£946

Porto AlegreLondon

POA - LGW

POALGW

Porto Alegre Salgado Filho

Wed 6/5

08:25-14:00

2 stops25h 35m

London Gatwick

Mon 25/5

16:25-21:45

1 stop33h 20m

£953

Porto AlegreLondon

POA - LGW

POALGW

Porto Alegre Salgado Filho

Mon 4/5

14:20-17:50

2 stops23h 30m

London Gatwick

Tue 26/5

18:35-09:15

2 stops18h 40m

£961

Flights are sorted by cheapest return flights first.

Deals found on 26/2

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Porto Alegre to London

Have a flexible travel schedule? Discover the best time to fly to London 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

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

Use this chart to determine the optimal time to book a return flight from Porto Alegre to London. Price data was last updated on 20 February 2026.

The best time to book flights from Porto Alegre to London 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?

Currently, January is the cheapest month in which you can book a flight from Porto Alegre to London (average of £121). Flying from Porto Alegre to London in September is currently the most expensive (average of £840). 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 Porto Alegre to London?

What’s the top stopover airport for flights from Porto Alegre to London?

Share of one-stop return flights from Porto Alegre to London chosen by Cheapflights users in the past 12 months, using the same stopover each way.

Sao Paulo (GRU) – chosen by Cheapflights users on 83% of one-stop itineraries from Porto Alegre to London on Cheapflights.

What’s the cheapest stopover airport for flights from Porto Alegre to London?

Average return fare for one-stop flights from Porto Alegre to London, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Sao Paulo (GRU) is the most affordable one-stop option, with an average return flight price of £811.

What’s the fastest stopover option from Porto Alegre to London?

Shortest average travel time for one-stop one-way flights from Porto Alegre to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover airport.

Flights via Sao Paulo (GRU) have the shortest average one-way travel time for one-stop routes: 15h 02m.

Which airport typically offers the quickest stopover for flights from Porto Alegre to London?

Average stopover duration for one-stop one-way flights from Porto Alegre to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Sao Paulo (GRU) offer the fastest connection on this route, with an average stopover time of 2h 13m.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 27 February 2026.
See what other customers who have flown with LATAM Airlines and TAP AIR PORTUGAL from Porto Alegre to London have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
LATAM Airlines
7.5
Good
1,922 reviews
Check prices

Entertainment

7.0

Crew

8.0

Overall

7.5

Boarding

7.5

Food

6.7

Comfort

7.3

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
7.5
Good
1,922 reviews
LATAM Airlines
7.5
Good
1,922 reviews
Check prices

Entertainment

7.0

Crew

8.0

Overall

7.5

Boarding

7.5

Food

6.7

Comfort

7.3

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
TAP AIR PORTUGAL
7.1
Good
2,151 reviews
LATAM Airlines
7.5
Good
1,922 reviews
Check prices

Entertainment

7.0

Crew

8.0

Overall

7.5

Boarding

7.5

Food

6.7

Comfort

7.3

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 London. 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?

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

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

    Departing from Porto Alegre to London will take you 16h 55m. There are 6410 mi between Porto Alegre and London. Both multi-stop and direct flights can be found to your destination and back.

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

    Cheapflights users have booked flights from Porto Alegre to London round-trip from £757. LATAM Airlines is currently priced 4% below the average price you’ll pay for this route.

  • What are the most popular routes from Porto Alegre to London?

    The most popular route from Porto Alegre to London is Porto Alegre Salgado Filho - London Heathrow. You may also consider Porto Alegre Salgado Filho - London Gatwick or Porto Alegre Salgado Filho - London City.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Porto Alegre to London (average of £121). Flying from Porto Alegre to London in September is currently the most expensive (average of £840). 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 Porto Alegre to London

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

Top airline flying from Porto Alegre to London

Discover the top airline that operate flights from Porto Alegre to London. 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 27 February 2026.
AirlineCheapestAverageFlexibilityOn-time
LATAM AirlinesCheapest£757Average£803FlexibilityNo 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 London?

When you search for this flight from Porto Alegre to London, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from Porto Alegre to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Porto Alegre to London flexibly with Cheapflights today.

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

Yes! Start tracking prices for Porto Alegre to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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