Cheap flights from London to Buenos Aires
Cheap return flights from London to Buenos Aires
Find the best deals
All prices shown are per person based on return flights only. Prices found in the last 48 hours.
Buenos Aires flight facts
What you need to know
What are the cheapest airlines?
- Iberia
- Air Europa
- British Airways
These airlines usually offer the cheapest flights from London to Buenos Aires.
What airlines fly indirectly?
- KLM
- Air France
- Lufthansa
These airlines fly from London to Buenos Aires, but you’ll have at least one layover.
How long is the flight?
14 hours 30 minutes
This is the shortest flight time from London to Buenos Aires.
Alternative flights from the UK to Buenos Aires
Check out prices for other routes
Alternative flights from London
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/Buenos Aires route. There are around 35 flights on any given week from the UK to Buenos Aires 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 to Buenos Aires
Tips and advice from our flight experts
You've searched for flights from London to Buenos Aires. 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 their deals! The cheapest offer we've found is a one-way ticket for the route London to Buenos Aires on 25/05/2026 at 01:35 for £75.
We've scanned hundreds of airfares from dozens of airlines across the globe. In total, we've found 10 airlines that operate the 11,600 km flight from London to Buenos Aires.
To find the best offers, consider booking 2-3 months in advance or looking for last-minute deals. The best time to fly is during the shoulder seasons (April-May, September-October). Iberia is a popular and affordable choice for this route, with an average flight duration of 14 hours 30 minutes. After selecting an offer, fill out your information and proceed to payment. Don't forget to check our flight + hotel service to book everything at once, saving you time and money!
Other popular destinations near Buenos Aires
Where other people are flying to
