What are the rules for booking an ‘open jaw’ redemption flight using Avios points?

HfP readers often contact us with issues over booking ‘open jaw’ Avios redemption flights.  I thought it was worth running over the rules on this as it is easy to get confused.

An ‘open jaw’ is a flight where you take your return flight from a different airport to the one you arrived at.  This does not mean a different airport in the same city (eg New York JFK and New York Newark) but a different city entirely.

One common use would be, for example, flying to San Francisco and flying back from Las Vegas, with a one-way car rental.

The British Airways online booking system does NOT let you book open jaw reward flights using Avios points.  You can book open jaw cash flights using the ‘multi-city’ tool.

Usually, this is not a problem.  British Airways is happy to let you book one-way tickets with Avios so you would simply book your trip as two single journeys.

There are three reasons why you might not want to book your open jaw trip as two separate one-way tickets:

• Surcharges – when booking with partner airlines, British Airways charges higher surcharges for flights originating in some countries outside the UK, in particular the US.  You may find that the charge for 2 x one-way flights is higher than booking a return. (This is no longer an issue on BA flights since the adoption of Reward Flight Saver, which fixes surcharges.)

• Using a BA Amex 2-4-1 voucher – in order to use a 2-4-1 voucher for a return journey, both flights need to be booked on the same ticket (this isn’t strictly true as this article explains and as we mention below in the discussion about Hong Kong)

• Cancellation fees – if you book a one way ticket out and a separate one way ticket back, you would be on the hook for two sets of £35 cancellation fees if you changed your mind. If your trip is on one ticket, you would only pay one £35 fee per person.

To book an open jaw Avios redemption you need to call British Airways.

Usually this is not a problem. However, some agents may not fully understand how the system is meant to work. Here are what are generally understood to be the rules relating to open jaw bookings.  Unfortunately, they are not written down anywhere on ba.com and some agents may not agree with them.

The British Airways open jaw rule

Here is key rule when booking an open jaw Avios redemption flight:

The geographic distance between your original landing airport and your new departure airport must be SHORTER than both of the two flights.

Using a European example, you could NOT book London to Madrid and fly back Helsinki to London.  This is because Madrid to Helsinki is further than either of the flights.

Using my earlier example, you CAN fly out London-San Francisco (5,367 miles) and back Tokyo-London (5,974 miles), because both of those flights are longer than the distance between San Francisco and Tokyo (5,124 miles).

There is one other quirk.  Once an open jaw is booked, you cannot amend it if it means a change to the Avios required, ie if you move into a different Avios pricing zone.

You cannot, for example, change an open jaw ‘London-Paris-[surface]-Hamburg-London’ to ‘London-Paris-[surface]-Istanbul-London’ as Hamburg and Istanbul are in different Avios pricing zones.  The whole ticket must be cancelled with the risk that you cannot rebook the leg you want to keep.  It is very rare that you would find yourself in this position however.

When not to use an open jaw

If your open jaw flight involves returning from Hong Kong, Sao Paulo or Rio, I strongly recommend that you don’t bother.  Book 2 x one-way tickets instead.

Taxes and charges on tickets which originate in Hong Kong are peanuts (£35.97 in Club World), as you can see here:

You will make a big saving if you book UK-somewhere and Hong Kong-UK on two separate tickets.

Sao Paulo and Rio work in the same way. Here is a one way from Sao Paulo with £8 of taxes and charges:

Rio de Janeiro is also £8.

It is possible to use a 2-4-1 voucher and still benefit from the low taxes out of Hong Kong, Sao Paulo or Rio.

You need to book the outbound flights as a one-way using your 2-4-1 voucher as usual.

You book your return flight, separately, using full Avios (so you need to have enough Avios in your account).  You can then ring BA, link the two flights and get half of the Avios for the return flight refunded.  Because each flight remains on a separate ticket, your taxes are not recalculated.

Conclusion

So now you know.  If you get a BA agent who does not want to process your open jaw booking based on the guidelines above, ask for a supervisor or simply call again.

As I said originally. the rules above are how it is believed to work – and how for most people it does work – but there is no cast iron proof in writing.  If you are told something different, let us know.

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How to earn Avios from UK credit cards (July 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:

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

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.

Run your own business?

We recommend Capital on Tap for limited companies. You earn points worth 0.8 Avios per £1 on the FREE standard card and 1 Avios per £1 on the Pro card. Capital on Tap cards also have no FX fees.

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

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.

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