How to use a BA Companion Voucher on Iberia reward flights

The catch, as ever with Avios, is that the best-looking redemption on paper isn’t always the best one in real life. In this blog, we’ll explain the BA Companion Voucher rules for Iberia, including which vouchers are eligible, how to use one, the key restrictions to note, and when you’re better off keeping your voucher in your back pocket for BA.

Does Iberia Accept Companion Vouchers?

If you’re asking yourself, “Can I use an Amex Companion Voucher on Iberia?” the answer is yes. Eligible British Airways American Express Companion Vouchers can be used on Iberia reward flights, although the cabin you can book depends on which voucher you have (more on that in the next section). A couple can use a voucher to book two eligible reward flights for the Avios cost of one, while a solo traveller can use it to cut the points needed for an eligible booking by 50%.

There are a few rules to get your head around first, though. Amex Companion Voucher Iberia bookings work slightly differently from simply finding a reward flight and booking it through Iberia.

There are four important things to know:

• The flight must be available as an Avios reward flight.
• The booking must be made through British Airways.
• Your voucher must be eligible for Companion Voucher partner airline redemptions
• You’ll still need to pay the applicable taxes, fees and carrier charges.

Which Companion Vouchers Work on Iberia?

Both British Airways American Express Companion Vouchers can be used on Iberia reward flights, but they do not give you the same cabin access. That’s a really important distinction to keep in mind, especially if you’re hoping to use your voucher for Iberia Business Class.

Here’s how the cabin rules differ between the two:

British Airways American Express Credit Card

The Companion Voucher you earn with the free British Airways American Express Credit Card can be used on British Airways, Iberia and Aer Lingus reward flights, but only in Economy.

So yes, Iberia is one of the Companion Voucher partner airlines available even with the free card, but the restriction is the cabin. If you find Iberia Business Class Avios availability, you won’t be able to use a voucher earned with the free BA Amex against those seats.

British Airways American Express Premium Plus Card

The British Airways American Express Premium Plus Card voucher is much less restrictive. It can be used on eligible British Airways, Iberia and Aer Lingus reward flights in any available cabin. That means the voucher can be used for Economy, Premium Economy or Business Class reward flights, depending on the aircraft and route.

How to Book an Iberia Reward Flight With a Companion Voucher

The important thing to remember is that even though you’re flying with Iberia, you’ll make the Companion Voucher booking through British Airways. Here’s how it works:

1. Log In to Your British Airways Club Account: Head to the Reward Flight booking page on the BA website and log in to the Club account that holds your Companion Voucher. Your voucher needs to be applied when you make the booking, so make sure you’re signed into the correct account before starting your search.
2. Select Your Companion Voucher: Choose the Companion Voucher you want to use at the top of the Reward Flight search page, then enter your destination, travel dates and number of passengers. If you’ve already spotted Iberia reward availability through Reward Flight Finder, you can use those dates to narrow down the search on BA.
3. Search for Your Reward Flights: British Airways will show the reward flights available for your chosen route and dates. Depending on the journey, those results can include flights operated by British Airways, Iberia or Aer Lingus. Look carefully at the operating airline when comparing the options. You’ll want the flight to be operated by Iberia or one of its eligible subsidiaries for an Iberia redemption.
4. Choose Your Iberia Flights: Select the Iberia itinerary you want and continue through the booking process. The Companion Voucher will be factored into the Avios price shown for the eligible booking, so check the final breakdown before confirming.
5. Pay the Taxes, Fees and Charges: The Companion Voucher reduces the Avios needed for the eligible reward booking, but it doesn’t wipe out the cash element. You’ll still need to pay the applicable taxes, fees and carrier charges for each passenger. BA currently requires these charges to be paid with an American Express card. Once the payment is complete, your Iberia reward flights and Companion Voucher will be tied to the same British Airways booking.

Why Use a Companion Voucher on Iberia?

A Companion Voucher is already a great way to stretch your Avios. Pair it with the right Iberia reward flight, and you’d be surprised at the value you can squeeze out of it.

Taxes and Fees Can Be Lower

One of Iberia’s biggest attractions is the cash element. The taxes, fees and carrier charges on some long-haul reward flights can be lower than you’d pay on a comparable BA redemption. You’ll notice the difference more when you’re booking for two, because a Companion Voucher saves you Avios, but you still pay the taxes and charges for both passengers. Just keep in mind that Iberia won’t always be cheaper, so always compare the full cost rather than just the Avios figure. Check the BA Companion Voucher rules before using your voucher.

Your Avios Can Go Further

You’ll need fewer Avios than the equivalent British Airways option on some routes. And having a Premium Plus voucher can make a big difference to the Avios bill if Business Class is the goal. Two people can travel for the points required for one eligible reward flight, while a solo traveller can get 50% off the Iberia Business Class Avios price. This is why Iberia is worth checking before automatically spending your voucher on BA. A lower starting Avios price gives the voucher less work to do in the first place.

You’ll Have More Options for South America

Iberia’s Madrid hub is one of its biggest advantages if South America is on your wish list. The airline has a strong network between Spain and Latin America, which makes Madrid a great jumping-off point for destinations that can be harder or more expensive to reach with Avios from the UK. That does mean adding the journey to Madrid, but a positioning flight can be a small price to pay for better points value if the long-haul redemption is good enough.

North America Can Be Better Value

Don’t assume Iberia only works when you’re heading south. Its Madrid network includes major US cities such as New York, Boston, Chicago and Miami, with Newark joining the network in March 2026. Starting the long-haul leg in Madrid can produce a much more attractive redemption for some routes than flying directly from London. It adds a connection, of course, so the saving needs to be good enough to justify the extra journey.

Business Class Can Be Better Value

Iberia Business Class is arguably the best part of this strategy if you hold a Premium Plus Companion Voucher. You get a fully flat seat and direct aisle access on Iberia’s long-haul Business Class, and newer A350 aircraft are also receiving its latest Business Suite with sliding doors. For voucher eligibility, check the BA Companion Voucher rules.

Things to Know Before Booking

There are a few rules worth having in mind before you start planning:

• It only works on reward flights. You can’t use a Companion Voucher against a cash fare or part-pay-with-Avios booking. The seats need to be available as reward flights.
• Reward availability still matters. The voucher can’t be used to book a seat that’s not available.
• You’ll still pay the taxes and charges. The voucher reduces the points needed, not the cash element of the booking. Taxes, fees and carrier charges still apply for every passenger.
• You need to book through British Airways. Even though the flight is operated by Iberia, a Companion Voucher booking needs to be made through British Airways.
• Iberia availability won’t necessarily match BA availability. Reward flights are released separately by each airline, so finding British Airways seats on a route doesn’t mean Iberia will have seats on the same dates, or vice versa. You’ll need to check both.

Should You Use Your Companion Voucher on Iberia?

Sometimes, absolutely, but Iberia’s pricing can be good enough that the voucher is worth saving. Ask yourself whether using your voucher is the best move if Iberia is already charging relatively few Avios for the route you want, or whether you’d get a bigger saving by keeping it for a more expensive British Airways redemption later.

You can afford to be more selective if your voucher still has lots of time left before it expires. The biggest points saving isn’t always the best use of a voucher if you’re giving up the chance to save much more on another trip.

On the other hand, using a Premium Plus Companion Voucher can be an excellent redemption if you’ve found two Iberia Business Class seats on dates that work, the taxes are reasonable, and the Avios price beats the BA alternative.

BA vs Iberia: Where Should You Use Your Amex Companion Voucher?

British Airways still has one very obvious advantage: convenience. Adding a flight to Madrid needs to save you enough Avios or money to make the extra journey worthwhile if BA flies directly from London to where you want to go. However, the inconvenience of starting in Madrid may be a fair trade if you can offset the points cost, pay less in taxes, and still get a good Business Class seat.

So don’t automatically use your Companion Voucher on the first eligible Iberia flight you find. First, compare the points, the cash cost, and the journey itself with the BA alternative. Sometimes Iberia will come out comfortably ahead. Other times, you’ll be better off paying Iberia’s already-reasonable Avios price and keeping the voucher for a redemption where it can save you much more.