BA opens reward seats 355 days ahead, but partners differ and late releases matter. Here is every booking window, and when you should actually be searching.
“How early can I book?” is one of the most common Avios questions — and the answer is not a single number. It depends on which airline flies the route, whether your trip has connections, and how scarce your cabin is.
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For flights operated by British Airways, you can book Avios reward seats up to 355 days before departure. That is the earliest the schedule loads and guaranteed reward seats appear. Partner airlines run their own booking windows, ranging from roughly 330 to 361 days ahead.
But “how far in advance you can book” and “when you should book” are two different questions. Seats open at the far end of the window, but plenty also appear much closer to departure — so the best time to look depends on your route and cabin.
Because Avios can be spent across several airlines, the window shifts depending on who operates the flight. These are the approximate release windows:
| Airline | Booking window | Notes |
|---|---|---|
| British Airways | 355 days | Guaranteed minimums load at the release; midnight GMT. |
| Iberia | ~330 days | Shorter window; own peak/off-peak calendar. |
| Aer Lingus | ~330 days | Transatlantic reward seats via Avios. |
| Qatar Airways | up to ~361 days | One of the longest windows; book early for Qsuite. |
| Finnair | up to ~361 days | Long window, but some partners are phone-only. |
Windows change from time to time. Treat these as a planning guide and always confirm on the operating airline’s own site. For the BA rule in full, see our 355-day booking window guide.
When an itinerary combines more than one airline, your effective booking window is set by the shortest release window in the chain. A BA flight might open at 355 days, but if it connects to an Iberia leg that only opens at 330 days, you cannot confirm the whole journey as one booking until that later leg is available.
The practical workaround is to book each leg separately as it opens, then piece the trip together — accepting that you may pay taxes and surcharges on more than one ticket.
Grabbing a seat the moment the window opens guarantees you get it — but it is not the only chance. A large share of reward seats appear much later, and for scarce cabins the late windows are often your only realistic shot:
Do not confuse the booking window with a waitlist. BA does not operate a reward-seat waitlist — if a seat is not available, you have to keep checking or use alerts. Our BA waitlist guide explains what to do instead.
The AviosArcana Editorial Team
We decode the British Airways loyalty programme in plain English, cross-checking every figure against BA’s published rules and the tools as they actually behave.