How does the reward flight cost calculator work?

It adds the cash you still pay on a reward booking to the notional value of the Avios you spend, giving a single “effective cost”. It then works out your value per Avios — the cash saving versus the fare, divided by the Avios used — so you can judge whether the redemption is good value.

What Avios value should I enter?

A cautious baseline is 1.0p per Avios. Frequent premium-cabin redeemers might use a little more; if you mostly fly short-haul economy, a lower figure such as 0.8p is more realistic. The calculator lets you set your own so the result reflects how you actually use Avios.

Should I include taxes and fees in the cash fare box?

Enter the full cash fare for the same flight in the cash fare box, and the reward booking’s taxes and fees separately. The tool subtracts the fees from the fare when working out your true cash saving, because you pay those fees either way.

What counts as good value per Avios?

As a rough guide, above 1.3p is strong, roughly 0.8p to 1.3p is the normal sweet spot, and below 0.8p is weak — a sign that paying cash may be the smarter choice. Premium long-haul tends to deliver the highest values.

Does this work for partner airlines like Qatar Airways?

Yes. Enter the Avios and the taxes and fees the partner booking quotes, plus that airline’s cash fare. Because some partners charge far lower surcharges than BA, they can show a much better value per Avios for a similar seat.

Are the results guaranteed?

No — they are only as accurate as the numbers you enter, and prices move constantly. Always use the live Avios price, the exact taxes and fees quoted, and the real cash fare on the day you book.

AviosArcana

Calculator

Reward Flight Cost Calculator

A reward flight is never truly free. Enter the Avios, the cash you pay, your Avios value and the cash fare, and see the real cost — and exactly how hard your points are working.

Last updated: September 2026 Instant results

Work out the real cost

Avios required

The Avios BA is asking for the reward seat.

Taxes, fees & surcharges (£)

The cash you still pay on the reward booking.

Your Avios value (pence each)

A cautious baseline is 1.0p. Adjust to your own benchmark.

Cash fare for the same flight (£)

What BA (or a rival) charges in cash for the same seat.

Effective cost

£700

£200 cash + Avios value

Value per Avios

1.40p

vs the cash fare

Saving vs cash

£200

at your Avios value

Strong value — your Avios are working hard here. A good redemption.

Illustrative — enter your own figures

1. How to use the calculator

A reward flight is never just “free with points”. Its true cost is the cash you still pay plus the value of the Avios you hand over. This calculator turns both into a single figure so you can compare it honestly against the cash fare. Enter four things:

Avios required — the points BA is asking for the seat.
Taxes, fees and surcharges — the cash portion you pay on top of the Avios.
Your Avios value — what you reckon one Avios is worth to you, in pence. A cautious baseline is 1.0p.
The cash fare — what the same flight costs to buy outright.

Not sure what to put for your Avios value? Most people should use somewhere between 0.8p and 1.2p. Our how much are Avios worth guide explains how to set your own personal benchmark.

2. What the results mean

Effective cost — the cash you pay plus the notional value of the Avios spent. This is the real price of the reward seat.
Value per Avios — the cash you save (the fare minus the fees you pay anyway) divided by the Avios spent. This is the honest measure of how hard your points are working.
Saving vs cash — how much better (or worse) off you are versus simply buying the cash fare, at your chosen Avios value.

The single most useful number is value per Avios. As a rough guide, above 1.3p is strong, around 0.8p to 1.3p is the normal sweet spot, and below 0.8p means your points are being spent lightly — often a sign to pay cash instead.

Our pick for tier points

Amex British Airways Premium Plus

2-4-1 Companion Voucher usable in any cabin — including Club World and First
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Runner-up

Barclaycard Avios Plus

Earn 1.5 Avios per £1 on all spending
Cabin upgrade voucher annually
No foreign transaction fees

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Affiliate link — we may earn a commission at no cost to you. Full disclosure.

3. A worked example

Say a Club World return to New York needs 176,000 Avios plus £499 in taxes and fees, and the cash fare for the same flights is £3,200. The cash you actually save is £3,200 − £499 = £2,701. Divide that by 176,000 Avios and you are getting about 1.53p per Avios — a strong premium-cabin redemption. Now try the same maths on a £120 short-haul economy hop and you will usually see why those are far more marginal.

All figures here are illustrative. Always plug in the live Avios price, the exact taxes and fees BA quotes, and the real cash fare on the day — those move constantly.

4. Getting the most from every redemption

Choose off-peak dates — the same seat costs fewer Avios, lifting your value per Avios straight away.
Favour premium long-haul, where cash fares are highest and Avios stretch furthest.
Watch the surcharge — a heavy carrier surcharge can quietly wreck an otherwise good redemption.
Compare partner airlines — some charge far less in fees for a similar seat.

To dig deeper, see how the cash portion is built up in our taxes and fees explainer, check whether your dates are peak or off-peak, and estimate the surcharge itself with our carrier surcharge calculator.

Frequently Asked Questions

The AviosArcana Editorial Team

We decode the British Airways loyalty programme in plain English. Our calculators use transparent maths you can check yourself — no black boxes, no inflated valuations.

Where to go next

Reward Taxes & Fees ExplainedExactly what makes up the cash portion of a reward booking.Is Avios Worth It for Europe?When short-haul redemptions beat paying cash — and when they don’t.

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