The 2026 Avios Arbitrage: Why Madrid and Dublin Are Mandatory for US Redemptions

Paying 80,000 Avios to fly Club World out of Heathrow right now is a terrible deal. British Airways has spent the last few years leaning heavily into high-Avios Reward Flight Saver tiers, and the UK government recently hiked Air Passenger Duty again. If you are planning a trip to the United States for late 2026 or early 2027, booking direct from London will drain your account unnecessarily.

You do not collect points to subsidise the Treasury or cover BA’s carrier-imposed surcharges. The solution is what we call the Avios arbitrage. The entire Avios ecosystem is now integrated across British Airways, Iberia, Qatar Airways, Aer Lingus, and Finnair. You can move your points freely between them at a 1:1 ratio. But while the currency is unified, the pricing logic is completely fractured.

By taking a cheap positioning flight to Madrid or Dublin, you can exploit the massive price gap between crossing the Atlantic from London versus crossing it from Europe. You dodge the UK taxes, you access cheaper reward charts, and you stretch a standard Avios balance twice as far.

How the 2026 Avios arbitrage actually works

The arbitrage relies on bypassing the two biggest penalties of flying long-haul out of the UK: the reward chart pricing and the departure taxes. When you start your journey in a European city outside the UK, you simply do not pay these premiums.

In April 2026, the UK’s Air Passenger Duty (APD) for long-haul premium cabins increased to £216 per person. This is a hard tax levied on flights departing a UK airport. When you book a direct flight from London to New York, that £216 is baked into the cash portion of your redemption. If you start your long-haul ticket in Dublin or Madrid, your UK APD drops to exactly £0.

Then there is the Avios pricing. Flying London Heathrow (LHR) to New York (JFK) in BA Club World currently demands 80,000 Avios + £175 each way on standard off-peak dates. BA does offer an alternative option of 50,000 Avios + £350, but you are still bleeding cash. Iberia and Aer Lingus operate their own distinct reward charts. They charge fewer Avios for the exact same distance, and their cash surcharges are significantly lower. The arbitrage is simply the act of moving your points to the airline that charges the least for the exact same geographical hop.

The Iberia sweet spot: Madrid to the US East Coast

Iberia’s Band 5 pricing is the single most lucrative redemption in the entire Avios network right now. Off-peak Business Class flights from Madrid (MAD) to US East Coast and Midwest hubs like JFK, Boston (BOS), and Chicago (ORD) cost exactly 34,000 Avios + roughly €140 in taxes each way.

Compare that to the 80,000 Avios BA wants for the London departure. You save up to 46,000 Avios per direction. A couple flying return to New York saves 184,000 Avios just by starting in Spain.

Right now, this deal is even better. Iberia is running a flash 30% off Avios sale ending 15 June 2026 for US flights. If you book before that deadline, the MAD–US route drops to an astonishing 23,800 Avios in Business Class, or 15,600 Avios in Economy. This is the highest cents-per-point value available this year. You need an active Iberia Plus account to book this promo pricing, and your account must be at least 90 days old with some previous earning activity to use the “Combine My Avios” tool.

Applying the BA Amex Companion Voucher

In 2026, British Airways American Express Companion Vouchers are fully redeemable on Iberia and Aer Lingus metal. You are no longer restricted to flying BA.

Applying a 2-for-1 voucher to a MAD-JFK off-peak Iberia flight means two passengers fly Business Class for a combined 34,000 Avios + €280. You book this directly through the British Airways website, as the voucher lives in your BA Executive Club account. Note that Barclays Cabin Upgrade Vouchers do not share this flexibility; they remain strictly limited to British Airways flights.

Exploiting the calendar mismatch

British Airways and Iberia do not share the same peak and off-peak dates. They set their calendars based on local school holidays and national demand. You can use this to your advantage during UK school holidays.

During the UK October 2026 half-term, BA prices all long-haul flights at peak rates. Iberia classifies those exact same dates as off-peak. If you are tied to school holidays, flying via Madrid allows you to pay off-peak Avios rates during a peak UK travel window.

The Aer Lingus alternative: Dublin to the US

If flying south to Spain before heading west feels geographically wrong, Dublin offers a brilliant northern alternative. Aer Lingus flights from Dublin (DUB) to JFK, Boston, or Chicago price at 50,000 Avios + roughly €160 in Business Class off-peak.

While 50,000 Avios is more than Iberia’s 34,000, it is still substantially cheaper than BA’s 80,000. But the real reason to choose Aer Lingus is the airport experience.

When flying Aer Lingus from DUB, you clear US Customs and Immigration in Ireland. You land at your US destination as a domestic passenger. Anyone who has stood in the notorious 90-minute immigration queues at JFK knows exactly how valuable this is. You grab your bags and walk straight out to a taxi.

The real cost of positioning flights

You have to get to Madrid or Dublin first. A positioning flight from London to MAD or DUB costs between 4,750 and 9,250 Avios + £17.50 using BA’s short-haul Reward Flight Saver.

The math here is incredibly straightforward. You spend roughly 9,000 Avios and £17.50 to save 46,000 Avios and £216 in APD. Even factoring in the positioning cost, you come out massively ahead. You can stretch a standard 100,000 Avios balance from a single transatlantic return flight into two transatlantic return flights.

The split-ticketing risk you cannot ignore

Booking separate tickets carries genuine risk. Because your London-Madrid and Madrid-US flights are on separate bookings (different PNRs), the airlines treat them as entirely unrelated journeys.

If your BA positioning flight is delayed and you miss your Iberia or Aer Lingus connection, the second airline has zero legal obligation to rebook you. If you miss the connection, your transatlantic ticket is voided. You will be stuck in Madrid or Dublin having to buy a walk-up cash fare to the US, which will wipe out any savings you made.

Practical strategies for a stress-free connection

The only way to manage split-ticketing risk is to remove the time pressure completely. Never fly your positioning flight on the same day as your transatlantic leg.

Fly to Madrid or Dublin the evening before. Treat the positioning stop as a mini-break rather than a layover. Book a comfortable airport hotel and enjoy a relaxed dinner. For 2026, Hilton Honors is currently running a 100% bonus points promotion, making properties like the Hilton Dublin Airport or the Madrid Marriott Auditorium excellent redemptions to keep your cash outlay low.

By arriving the night before, you build a massive buffer. Even if your evening BA flight is cancelled, you have time to book a low-cost carrier the following morning and still make your long-haul departure.

Honest verdict: Is the extra hassle worth it?

Honestly, yes. If you are flying to the US East Coast or Midwest, the math is undeniable. Saving up to 46,000 Avios per person, per direction, justifies a night in an airport hotel. The current Iberia June 2026 promo dropping Business Class to 23,800 Avios is almost absurdly cheap.

The equation gets slightly weaker if you are flying to the US West Coast. Iberia’s route network to cities like Los Angeles or San Francisco is thinner, and the Avios pricing jumps up a band, narrowing the gap with BA. But for New York, Boston, or Chicago, the Madrid and Dublin routes are mandatory reading for anyone who values their points.

Stop burning your hard-earned balances on Heathrow departure taxes. Book the positioning flight, enjoy a night in Spain or Ireland, and explore more guides on Points Uncovered to keep optimising your travel.