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There are substantial differences between the two main calendars for BA and Iberia. Especially when travelling during school holidays on a route served by both by BA and Iberia, it may well be cheaper to book on Iberia.
If, for example, you want to travel on British Airways in April 2019, you will be paying the peak Avios price from 5th April until 23rd April. However, if you look at the Iberia calendar, you can see that Iberia’s peak period is only from 17th – 22nd (as well as 12th + 13th and 26th +27 th).
There are also differences around February half-term. The whole month of February is off peak for Iberia whilst BA has peak days between 15th and 18th as well as 21st and 24th February.
For example, Saturday 10th February is peak for BA and off-peak for Iberia. On that day, a Club World return from London to New York would be 120,000 Avios return (peak BA price). In comparison flying from Madrid to New York on the same day would be only 68,000 Avios return (off-peak Iberia price). The taxes and charges would also be £380 lower on the Iberia ticket as long as you book it via the Iberia website (£537 v £157).
The summer holidays peak season starts earlier on Iberia (19th June) and ends one week after BA.
The days around Christmas are also interesting as BA sees the full second half of December as a peak travel time whereas Iberia sees 25th and 26th December as off-peak dates.
For clarity …. these charts apply irrespective of which website you book on. If you book an Iberia redemption on ba.com, it still uses the Iberia peak and off-peak chart. Similarly a BA redemption book on iberia.com will use the BA chart. You should still ensure that Iberia redemptions are booked on iberia.com as the taxes and charges are usually substantially lower.
There is a separate article with the Aer Lingus 2019 peak and off-peak Avios calendar which is here.
Thanks to Paul for flagging this up.
British Airways calendar:
(green=peak, blue=off peak / click to enlarge)
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