Flight deals from London to Buenos Aires

We've found these cheap flights for you. You can book one-way or return flight tickets.

Round-trip
One way

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Flight Information from London to Buenos Aires

Cheapest one-way flight price	£400
Cheapest return ticket price	£809
Off-season travel month	March
Peak season for travel	June
Flight distance	11,121.8km
Average flight time	17 hours 5 minutes
Popular airline	Aeromexico

Find the best time to fly from London to Buenos Aires

We monitor flight fares to help you find the best deals effortlessly

Cheapest flights

From price

20 27
May

27 4
4 11
11 18
18 25
Jun

25 1
1 8
8 15
15 22
22 29
Jul

29 6
6 13

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.

FAQ

When are flight tickets from London (LON) to Buenos Aires (BUE) the cheapest?

Airlines adjust prices for flights from London to Buenos Aires based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
How much are flights from London (LON) to Buenos Aires (BUE) cost?

According to Trip.com's data, the lowest price is around £1,000.
How long is the flight from London (LON) to Buenos Aires (BUE)?

It takes about 17 hours 5 minutes to fly from London (LON) to Buenos Aires (BUE).
What are the most popular airlines that fly from London (LON) to Buenos Aires (BUE)?

Airlines with flights from London (LON) to Buenos Aires (BUE): British Airways, Finnair and Iberia.
How many airports in Buenos Aires (BUE)?

There are 2 airport(s) in Buenos Aires (BUE): Jorge Newbery Airport and Ministro Pistarini International Airport.

How to find a cheap flight from London to Buenos Aires

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from London to Buenos Aires. Book your flights at the right time and save more.

Be flexible with your travel dates to get the cheapest flight from London to Buenos Aires.

Simply tap "Date" on the flight search bar to browse through the calendar and check out airfare from London to Buenos Aires over the next 6 months in 2025. If you're planning to fly within the next three months, it looks like the most affordable option is on Tue, May 13, with one-way flights priced at just £106.

Compare cheap flight deals from London to Buenos Aires across hundreds of airlines.

With our extensive search, you can compare prices from over 500 airlines to find the cheapest flight tickets from London to Buenos Aires. The cheapest airline for this route is British Airways.

Set up a Price Alert

By setting up a Price Alert for your journey from London to Buenos Aires, you can easily keep an eye on ticket prices without having to check every day.

Don't miss out on cheap flight deals and promo codes from London to Buenos Aires.

You can always find the latest offers through Trip.com Deals and Promo Codes for cheap flights. By signing up for a free membership, you'll get access to even more deals for your flights.

Book early or wait until the last minute.

It's usually best to book early. Flight tickets are often cheapest when they're first released, typically about a year before the departure date. So, have a look online as soon as the flights you're interested in become available. If you miss the cheapest time, you might still find some good deals as the departure date gets closer.

Search for flights on the go.

For the best travel flight booking experience, download the Trip.com app. You can search for cheap flights from London to Buenos Aires and snag some exclusive deals just for you.