Bypassing Heathrow Surcharges: Leveraging Iberia Plus for South America

The April 2026 hike to UK Air Passenger Duty changed the math for long-haul reward flights. Booking British Airways out of London is now notoriously expensive. You might have a mountain of Avios, but the cash component is entirely wiping out their perceived value.

Here’s the thing. You do not have to accept those fees. Iberia Plus is currently running a promotion offering up to 30% off Avios redemptions on select routes until 10 May 2026. By routing your South American trips through Madrid instead of Heathrow, you drop the cash taxes by hundreds of pounds and drastically reduce the total Avios required. For readers of Points Uncovered sitting on large balances, this is the exact moment to act.

Why flying out of Heathrow is burning your cash

The current cost of a British Airways long-haul Business Class return from London Heathrow (LHR) to São Paulo (GRU) using standard Reward Flight Saver pricing is 180,000 Avios plus a massive £700 in cash. The culprit is the April 2026 UK Air Passenger Duty increase.

Premium long-haul tax bands now sit well over £220 before British Airways even begins adding its own carrier surcharges. South America is already an expensive destination for cash fares. Paying £700 on a “free” reward flight makes the entire redemption feel pointless.

The Iberia Plus sweet spot to South America

Flying out of Madrid (MAD) on Iberia drops the cash taxes to roughly £115 (€135) for a one-way business class ticket to South America. Standard off-peak pricing to Rio de Janeiro (GIG) or São Paulo (GRU) requires just 51,000 Avios.

If you book before 10 May 2026 using the active 30% discount promotion, that exact same one-way flight to Brazil drops to an astonishing 35,700 Avios plus £115. Honestly, I’m not convinced you will find a higher cents-per-point redemption anywhere in the Avios ecosystem right now.

Reaching deeper into the continent

Iberia flies to 18 destinations across 16 countries in Latin America directly from Madrid Barajas. This network completely dwarfs the direct South American footprint British Airways operates from London.

Flights to destinations in Avios Band 7, like Buenos Aires (EZE) or Santiago (SCL), normally cost 75,000 Avios plus £125 one-way off-peak in Business Class. Under the current May promotion, that price falls to 52,500 Avios.

You are also getting an excellent hard product on these longer sectors. Iberia heavily deploys its A350-900 “Next” cabins on high-yield routes to Buenos Aires, Bogotá, and Lima. These feature private suites with sliding doors, putting them right on par with the BA Club Suite.

Managing positioning flights and the new EES borders

You need to get to Madrid to start this itinerary. A British Airways positioning flight from Heathrow to Madrid in Euro Traveller costs as little as 14,500 Avios and £1 using Reward Flight Saver.

This is genuinely impressive but the small print is annoying. Oneworld policy no longer mandates through-checking baggage on separate ticket references. You must assume you will need to collect your bags in Madrid and re-check them at the Iberia desk.

Because the new EU Entry/Exit System (EES) is now fully live across Schengen borders, biometric registration is causing slight delays. You have to clear EES passport control to collect those bags. I highly recommend leaving a minimum of three to four hours between your London arrival and your Madrid departure. Do not risk a tight connection on separate tickets.

Bypassing the 90-day Iberia account rule

You can transfer British Airways Avios to Iberia Plus instantly using the “Combine My Avios” tool, provided your Iberia account has been open for 90 days and has earned at least 1 Avios previously.

If your account is brand new, your direct transfer will fail. You can bypass this restriction using Qatar Airways Privilege Club. Link your British Airways Executive Club account to Qatar Airways, then link your Qatar Airways account to Iberia Plus. You can push the Avios from BA to Qatar, and then immediately from Qatar into Iberia, entirely skipping the 90-day waiting period.

Funding the trip with current American Express bonuses

The current American Express Business Platinum sign-up offer of 120,000 points ends this Tuesday. That single bonus is enough to instantly fund a return Business Class ticket to Brazil on Iberia under the current promo. You will even have points left over to cover the positioning flights.

If you recently picked up the 60,000 point bonus on the Business Gold card or the 10,000 Avios supplementary card offer, you are already well within range of a one-way premium redemption. Transferring Amex Membership Rewards to Iberia Plus is usually instantaneous, meaning you can lock in these flights before the 10 May deadline.

Navigating peak and off-peak calendars

Iberia sets its own peak and off-peak calendar. It is entirely separate from the British Airways calendar.

Iberia ties its peak dates heavily to Spanish school holidays and local bank holidays. This often works in a UK flyer’s favour. The UK half-term weeks frequently fall on off-peak dates in the Iberia system, allowing you to book family trips at the lowest possible Avios rates while British Airways is charging peak prices out of London.

The final verdict on flying via Madrid

In my experience, the sheer cash savings make this strategy undeniable. Yes, booking a separate positioning flight and navigating Madrid’s baggage claim under the new EES rules adds friction. You are swapping convenience for value.

But saving nearly £600 in cash and tens of thousands of Avios per person is an easy trade-off. South America is notoriously expensive for cash fares in 2026. Leveraging Iberia Plus is the smartest way to get there in a flat bed without emptying your bank account.

To find more strategies for maximising your points, explore more guides on Points Uncovered.