Part-paid a BA cash fare and your dates might move? What BA says happens to the money portion, and what to check before you change

If you used Avios Part Pay to bring down the cash price of a British Airways fare and a cheaper off-peak date has now caught your eye, a straight date change is probably the wrong tool. BA’s own wording says the money you paid won’t shrink to match the cheaper date. Its suggested alternative is to cancel and start again.

The relevant passage is on the British Airways Club Reward Flights page:

“When changing from a peak to off-peak date, we’ll refund any difference in Avios price. However, for Avios part payment bookings, we’ll be unable to refund any difference in the money portion of the price. You’ll be able to cancel the original flights for a full refund and make a new booking instead.”

So a change returns any Avios difference but not the money difference, and cancel-and-rebook is the documented way to capture a cash saving. That second route comes with conditions. You need to be more than 24 hours before your first flight, a fee may apply, BA doesn’t say what “full refund” covers on a part-paid cash fare, and nothing holds the cheaper price while you cancel. You also need to confirm the wording covers your booking at all, because it sits on the Reward Flights page rather than in dedicated Part Pay terms.

This guide assumes you booked directly on ba.com in pounds, on BA-operated flights, and applied Part Pay at checkout. BA Holidays packages, partner-operated flights and codeshares are outside its scope, and none of the evidence here covers how they are handled.

First, check which booking you actually hold

BA sells two products that both mix Avios and money, and they are easy to blur.

• Avios Part Pay on a cash fare. You start with a normal cash price and use Avios to knock it down. BA says you can reduce the cash price with as little as 1,000 Avios, and the more Avios you use, the less cash you pay.
• A Reward Flight paid with Avios & Money. You start with an Avios price and add cash to lower it. BA says that at checkout you’ll see a range of Avios & Money payment options where available. For these bookings, your travel date dictates whether you pay a peak or off-peak Avios amount.

A BA press release from around 2024 described part payment as different to booking a Reward Seat, which is limited in number and priced at a fixed rate. That release dates from the Executive Club era, but the distinction still holds on BA’s current pages.

It matters here because of where the key quote sits. The passage appears in a “Please be aware” section of the Reward Flights page, right next to the peak and off-peak Avios pricing. It does name “Avios part payment bookings”, which is why it deserves weight if you hold a part-paid cash fare. But it doesn’t define that term. And on a cash fare, the price gap between two dates comes from the fares themselves, not from a peak/off-peak Avios calendar.

My reading is that the wording most plausibly covers your booking. Still, treat it as unconfirmed until Manage My Booking or a BA agent shows you how your specific change would be costed. I haven’t been able to check a dedicated BA Part Pay terms page that would settle it.

Product type matters elsewhere too. For Avios-only flights, BA says that on Avios & Money bookings cancelled within 24 hours of outbound departure, neither the cash portion nor the Avios is refunded. That rule is written for a different product and shouldn’t be assumed to apply to a Part Pay cash fare, but it shows how much rides on knowing which booking you hold.

Option A: changing the date

On a change, BA’s wording splits the price in two. Any Avios difference comes back. Any money difference does not.

If most of what you paid was money, as in the example below, a cheaper off-peak date shows up mainly as a lower cash fare, which is exactly the part BA says it keeps. A date change can therefore leave you on the cheaper flight with nothing back in your pocket, and possibly a change fee on top.

Changes can also cost more. BA notes that some changes may require additional Avios, for example when moving from off-peak to peak.

There is one helpful detail. BA says that all changes will be shown in Manage My Booking, or explained over the phone, before they are made. You can see what a change would cost without committing, so use that as free information whichever route you end up taking.

On fees, the only BA statement in the evidence is its club factsheet. It says members won’t lose their Avios, as changes or cancellations can be made up to 24 hours before a flight for a fee. The factsheet is undated, generic rather than specific to Part Pay, and doesn’t give the amount. Take it as a sign that a fee may apply, and find out the figure on your booking.

A change can still be the right call. If you need the new date and the cash gap is small, keeping a confirmed seat may be worth more than the saving, especially when the cheaper date looks likely to sell out.

Option B: cancelling for a full refund and rebooking

This is the route BA itself points to. Its hardest edge is timing: cancellations must be made at least 24 hours before the first flight in your itinerary to be eligible for a refund. That line is also on the Reward Flights page, so it carries the same applicability caveat as the main quote, but treating it as binding costs you nothing. The comparison work below takes time, so start well before the deadline, not the night before.

The phrase “full refund” is where the documented rules stop. BA’s passage doesn’t say:

• whether it returns both the Avios and the cash on a part-paid cash fare
• whether it overrides the refund rules of the cash fare you bought
• whether a fee is deducted from it, charged separately, or taken in Avios
• how long the cash and Avios take to come back, or where the cash goes

Put those questions to BA before you act rather than filling in the answers yourself. If the agent tells you your fare type limits the refund, that answer overrides the general “full refund” line for your booking.

A worked comparison with made-up numbers

The figures below are hypothetical round numbers chosen to show the mechanics. They are not observed BA prices, and the fee is left as an unknown, F, because no source gives the current amount for Part Pay bookings.

Assume:

• Your original fare was £400. You used 4,000 Avios to take £40 off and paid £360 in cash.
• The off-peak date prices at £300 before Part Pay.
• On rebooking, Part Pay again offers 4,000 Avios for £40 off. That’s not guaranteed, as the next section explains.
• “Full refund” returns all £360 and all 4,000 Avios. This is unconfirmed.

Route	Cash you end up paying	Avios you end up using	What decides it
Change the date	£360, plus any change fee	4,000, with any Avios difference refunded	BA keeps the money difference
Cancel and rebook	£260, plus fee F	4,000, used again on the new booking	The refund is genuinely full and £300 is still available

In this illustration, cancel-and-rebook costs less cash than changing if F is less than £100 (the gap between £360 and £260) plus whatever change fee BA would charge on the change route. Against simply keeping the original booking at £360, it saves cash only if F is less than £100. The Avios used are the same on every route here, so cash alone decides it.

The general rule is one comparison, with cash and Avios kept side by side. On the cancel-and-rebook route, the cash is the new cash fare plus any cancellation fee plus any cash the refund doesn’t return, and the Avios are those used on the new booking plus any the refund doesn’t return. On the change route, the cash is your original cash plus whatever change fee Manage My Booking shows, and the Avios are what you already used, adjusted by any difference BA refunds or charges. If the Avios figures differ, put your own pence-per-Avios value on the gap; the cash totals alone won’t settle it. If you don’t actually need the new date, compare cancel-and-rebook with keeping your booking as it is rather than with a change. Three things usually tip it:

1. Whether the refund really returns everything you paid, in cash and Avios.
2. How any cancellation fee compares with the change fee and the cash you save.
3. Whether the new fare is still at the price you compared when you actually rebook.

Rebuilding Part Pay on the new booking

Don’t copy your old Avios amount onto the new booking out of habit. Part Pay doesn’t convert at a flat rate. In Max Your Trip’s August 2026 tests, small Part Pay amounts returned around 1p per Avios, falling to around 0.4p on many examples. In one case, 2,000 Avios saved £20, while 14,030 Avios saved only £70. Those were tests on a handful of bookings, not a BA rate card, but they show why the step you pick matters.

A cheaper fare may offer a different ladder of Part Pay options from the one you saw first time. Before you confirm, divide the pounds saved by the Avios used for each step and choose deliberately. A smaller Avios amount, or none at all, may make more sense on the new fare.

Earning is worth a check too. The same BA press release said members using part payment still collect Avios and Tier Points on their flight. That statement is historical, and a different cash fare could earn differently, so confirm what the new booking earns if it matters to your status plans.

For the separate maths of using Avios against cash fares in other ways, our piece on upgrading cash fares with Avios covers the upgrade side.

What you give up the moment you cancel

Cancelling is a one-way door. Once the original booking goes, so do its price and your seat. Nothing in BA’s wording holds the cheaper off-peak fare for you while the refund goes through. The new booking is priced as it stands when you make it, not as it looked when you first compared dates.

The sensible order is to price the new date, with your chosen Part Pay step, in a separate browser session immediately before you cancel. Then cancel and rebook straight away, accepting that even a few minutes’ gap carries some risk. If the cheaper date is down to its last seats in your cabin, that risk is larger, and a change at a known cost may be the calmer option.

Before you press cancel

Work through these in order. The first item takes precedence over everything else.

1. Check the 24-hour line. If your first flight is within 24 hours, BA’s stated rule says the cancellation isn’t eligible for a refund. Don’t cancel on the assumption that Part Pay is treated differently; speak to BA first. If you’re only just outside 24 hours, treat the deadline as at risk: the checks below take time, so speak to BA before starting them. Otherwise, carry on.
2. Confirm your product. Is it Part Pay on a cash fare, or a Reward Flight paid with Avios & Money? Your confirmation and Manage My Booking should show which. If it’s a Reward Flight, stop here and check BA’s Reward Flight change and cancellation terms for your booking instead, because the rest of this list is built for part-paid cash fares.
3. Screenshot the original booking, including the fare paid, the Avios used and the cash paid.
4. Open the change option in Manage My Booking, or call, and note exactly what BA shows a date change would cost. This is your fallback figure.
5. Ask BA these questions and note the answers:
   • Does the money-portion rule on the Reward Flights page apply to my part-paid cash fare?
   • Would cancelling return both my cash and my Avios, and do my fare’s rules limit that?
   • What fee applies, and how is it charged?
   • How long will the refund take, and where will the cash go?
   • Can I use the refunded Avios straight away on a new booking?
6. Price the new date in a separate session, with your Part Pay step chosen on its own merits.
7. Run the comparison. For cancel-and-rebook, total the new cash fare, any cancellation fee and any cash the refund won’t return, and separately note the Avios the new booking uses plus any the refund won’t return. Then pick one baseline. If you need the new date, compare with the change cost you noted in step 4. If you don’t, compare with keeping your booking as it is. Set cash and Avios side by side and value any Avios gap at your own pence-per-Avios figure. If cancel-and-rebook doesn’t beat that baseline, don’t cancel: take the change if you need the new date, and otherwise keep your booking.
8. If cancel-and-rebook is cheaper than that baseline, cancel and rebook immediately.

The core point comes from BA’s own words. On Avios part payment bookings, a date change returns any Avios difference but not the money difference, and cancelling for a full refund and rebooking is the documented alternative. Before you take that route, make sure you’re more than 24 hours out, that the wording covers your booking, that “full refund” means what you need it to, that the cheaper fare is still there when you rebook, and that the all-in cost, cash and Avios together, still beats keeping your booking or, if you need the new date, what BA quotes for the change.