The voucher is the easy part — finding two reward seats on the same flight is the real challenge. Here is how the 355-day release works and how to book two seats even when they seem impossible.
A companion voucher can only be applied when British Airways has two reward seats available in your chosen cabin on the same flight. That availability — not the voucher — is what makes or breaks a booking. This guide explains when seats appear, how to book the two legs separately, and the workarounds that unlock trips other people give up on.
What you’ll learn:
The voucher itself is simple to apply. What defeats most people is finding two reward seats in the same cabin on the same flight. British Airways releases a limited number of award seats per flight, and the more sought-after the cabin and route, the fewer there are. Everything in this guide is about maximising your odds of finding those two seats.
If your search prices the trip at full Avios for two passengers, that almost always means two award seats are not available in that cabin — not that the voucher has failed. The fix is finding availability, covered below.
British Airways loads reward seats roughly 355 days before departure, at midnight GMT. That first moment is frequently the best chance to secure two premium seats on a popular route, before anyone else books them. If you know your dates, set a reminder and search the instant they open.
A practical wrinkle: because seats drop at midnight GMT, the UK contact centre may be closed. Determined bookers sometimes call an international British Airways call centre in a different time zone to grab seats the moment they appear. Award space is also topped up at other points — watch the roughly 90-day and 3-week windows, and last-minute, when unsold premium seats can be released.
For the full toolkit on surfacing award space across airlines, see how to find Avios reward seats.
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You do not have to find the outbound and return at the same time. A reliable strategy on hard routes:
This linked-booking approach keeps both legs on one reference, which matters for the expiry rules — see when a companion voucher expires for how the outbound date governs the whole trip.
Two useful flexibilities:
If a flight is cancelled. Where British Airways cancels a flight (generally 24 hours or more before departure), the voucher is usually returned to your account so you can rebook. Keep an eye on your booking and act promptly.
Once you have found seats, check the value with the companion voucher calculator and make sure you are targeting a high-value redemption from our best uses guide.
The AviosArcana Editorial Team
We decode the British Airways loyalty programme in plain English, cross-checking every figure against BA’s published rules. We only recommend products we would use ourselves — and we tell you plainly when a redemption is not worth it.