Odd things are happening when you add a return to a one-way British Airways 2-4-1 flight ticket

British Airways seems to have tweaked its rules on how you can book a return ticket using a British Airways American Express 2-4-1 voucher, assuming you want to book as soon as tickets are released.

Let me recap the position for the benefit of readers who are not fully familiar with it:

Unlike most airlines, BA guarantees to release 2 x Club World or Club Europe seats and 4 x World Traveller or Euro Travellers seats on EVERY flight as soon as booking opens up at 355 days before departure.

Many more seats, including First and World Traveller Plus, are usually made available over the next 355 days.  However, if you absolutely MUST travel on a certain date to a certain place, your only guarantee of Avios tickets is to call an open BA call centre at midnight (1am during BST) 355 days before departure and grab some of the six guaranteed seats.

The reason you need to call – even though the seats also appear online at midnight – is that call centre agents can put tickets on hold during the payment process.  If you book online, it doesn’t matter if the seats are in your basket or not.  They are not yours until you’ve filled in all the passenger and payment details and hit ‘Pay’.  You have usually lost them to a call centre agent by that point.

The obvious snag with this process is that you can only book your outbound flight initially.  You need to wait 7-10 days (or however long you plan to be away) before the return flight opens up.

So far so good.

The historic position for booking your return flight was this:

You would call British Airways and tell them you wanted to add a return flight to an existing one-way booking

The call centre would do this and charge you the additional Avios and the difference between the taxes you paid and the total taxes for a return flight

BA even waived the £35 per person change fee

However, in the last year or so BA has allowed you to do something else:

You book the two return flights online for full Avios (this requires you to have enough Avios to do this) and full one-way taxes

At your convenience, you call British Airways.  The two bookings are merged into one – leaving you with just one booking reference – and you are refunded the additional Avios you used for the return flight and any excess taxes paid.

I think the reason BA wanted to encourage this was to reduce the volume of calls at midnight.

What has changed?

According to reports from HfP readers and Flyertalk users over the last few weeks, BA is now implementing a new position if you book your return flights online and try to merge them with an existing outbound flight.

When you call up:

BA refunds you the extra Avios you used for the 2nd ticket to reflect the fact it is ‘2 for 1’

You do NOT get your outbound flight merged into your inbound flight.  This means that you retain two separate booking references.

You do NOT get any excess taxes and charges refunded.  You are stuck with paying 2 x one-way taxes and charges rather than the taxes and charges on a return flight.

Why is this is a problem?

The taxes and charges on 2 x one-way flights are NOT the same as those for a return flight. 

This is because BA manipulates its charges based on what the local market will bear.  In particular, tickets which start in North America incur substantially higher charges than those which start elsewhere.

Here’s an example:

Return Club World Avios redemption to San Francisco:  £662.57

One-way Club World Avios redemption TO San Francisco:  £440.37

One-way Club World Avios redemption FROM San Francisco:  £485.90 (+ £440.37 = £926.27)

People who have been booking their return flight separately and asking BA to merge it into an existing 2-4-1 redemption are now having to pay an additional £527.40 (£263.70 x 2) in taxes and charges for a couple.

How can you avoid this additional cost?

If you need to contact British Airways to add a return leg to an existing 2-4-1 one-way booking, do NOT book the return online and call BA to merge the two flights together.  You are likely to end up overpaying your taxes and charges.

Instead, call up British Airways and ask them to book the return seats and add them to your existing booking.  Your wallet will thank you.

You can learn more about how the British Airways American Express 2-4-1 voucher works in this ‘Avios Redemption University’ article.

PS.  There are a couple of places where this trick could work in your favour.  Some countries cap the charges that airlines can add to their tickets.  Some ban them entirely.

Here is an example for Hong Kong:

Return Club World Avios redemption to Hong Kong:  £576.37

One-way Club World Avios redemption TO Hong Kong:  £377.37

One-way Club World Avios redemption FROM Hong Kong:  £34.50 (+ £377.37 = £411.87)

In this case, you SHOULD book the return leg of a 2-4-1 online and call BA to have half of the Avios refunded.  As long as they keep your two bookings separate, a couple will save £329 (£164.50 x 2) in taxes and charges.

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How to earn Avios from UK credit cards (April 2025)

As a reminder, there are various ways of earning Avios points from UK credit cards.  Many cards also have generous sign-up bonuses!

In February 2022, Barclaycard launched two exciting new Barclaycard Avios Mastercard cards with a bonus of up to 25,000 Avios. You can apply here.

You qualify for the bonus on these cards even if you have a British Airways American Express card:

Barclaycard Avios Plus Mastercard

Get 25,000 Avios for signing up and an upgrade voucher at £10,000 Read our full review

Barclaycard Avios Mastercard

Get 5,000 Avios for signing up and an upgrade voucher at £20,000 Read our full review

There are two official British Airways American Express cards with attractive sign-up bonuses:

British Airways American Express Premium Plus

30,000 Avios and the famous annual 2-4-1 voucher Read our full review

British Airways American Express

5,000 Avios for signing up and an Economy 2-4-1 voucher for spending £15,000 Read our full review

You can also get generous sign-up bonuses by applying for American Express cards which earn Membership Rewards points. These points convert at 1:1 into Avios.

SPECIAL OFFER: Until 27th May 2025, the sign-up bonus on the ‘free for a year’ American Express Preferred Rewards Gold card is increased from 20,000 Membership Rewards points to 30,000 points. Points convert 1:1 into Avios (30,000 Avios!) and many other programmes. Some people may see even higher personalised offers. Click here to apply.

SPECIAL OFFER: Until 27th May 2025, the sign-up bonus on American Express Platinum is increased from 50,000 Membership Rewards points to a huge 80,000 points. Points convert 1:1 into Avios (80,000 Avios!) and many other programmes. Some people may see even higher personalised offers. Click here to apply.

American Express Preferred Rewards Gold

Your best beginner’s card – 30,000 points, FREE for a year & four airport lounge passes Read our full review

The Platinum Card from American Express

80,000 bonus points and great travel benefits – for a large fee Read our full review

Run your own business?

We recommend Capital on Tap for limited companies. You earn 1 Avios per £1 which is impressive for a Visa card, and the standard card is FREE. Capital on Tap cards also have no FX fees.

Capital on Tap Visa

NO annual fee, NO FX fees and points worth 1 Avios per £1 Read our full review

Capital on Tap Pro Visa

10,500 points (=10,500 Avios) plus good benefits Read our full review

There is also a British Airways American Express card for small businesses:

British Airways American Express Accelerating Business

30,000 Avios sign-up bonus – plus annual bonuses of up to 30,000 Avios Read our full review

There are also generous bonuses on the two American Express Business cards, with the points converting at 1:1 into Avios. These cards are open to sole traders as well as limited companies.

American Express Business Platinum

50,000 points when you sign-up and an annual £200 Amex Travel credit Read our full review

American Express Business Gold

20,000 points sign-up bonus and FREE for a year Read our full review

Click here to read our detailed summary of all UK credit cards which earn Avios. This includes both personal and small business cards.