Cheap flights from London-Heathrow to Porto Alegre
Cheap return flights from London-Heathrow to Porto Alegre
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
Porto Alegre flight facts
What you need to know
What are the cheapest airlines?
- Iberia
- LATAM Airlines
- Air France
These airlines usually offer the cheapest flights from London-Heathrow to Porto Alegre.
What airlines fly indirectly?
- KLM
- Lufthansa
- British Airways
These airlines fly from London-Heathrow to Porto Alegre, but you’ll have at least one layover.
How long is the flight?
15 hours
This is the shortest flight time from London-Heathrow to Porto Alegre.
Alternative flights from the UK to Porto Alegre
Check out prices for other routes
Alternative flights from London-Heathrow
You might find cheaper flights nearby
Today alone, Netflights has searched over five flights. 05 / Feb / 2026 is currently the lowest priced day of the year to fly the London-Heathrow/Porto Alegre route. There are around 35 flights on any given week from the UK to Porto Alegre and the cheapest month to fly right now is February. Not suitable? Try running another search or viewing all cheap flight deals.
How to get cheap flights from London-Heathrow to Porto Alegre
Tips and advice from our flight experts
You've searched for flights from London-Heathrow to Porto Alegre. We've found 25 flights and compared them to give you the best offer. Iberia is, on average, the cheapest airline for this route. Look out for them! The cheapest offer we've found is a one-way ticket for £34 from London-Heathrow to Porto Alegre on 14/06/2026 at 16:50.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 10 airlines operating the 9,600 km flight from London-Heathrow to Porto Alegre.
To find the best offers, consider booking 2-3 months in advance or looking for last-minute deals. The low season is typically from March to June. Iberia is a popular and affordable choice for this route, with an average flight duration of 15 hours. After selecting an offer, fill out your information and proceed with payment. Consider booking a hotel with us or using our flight + hotel service to save time and money.
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