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Air Nostrum is a OneWorld associate member so you should be fine for that flight.
However Canary Air is not and you may not enjoy OW benefits on that flight despite the IB flight number.
Best to contact them to check.
Thanks, hopefully they honour it but if not it will just mean paying for a checked bag. Yes annoying but not massive in the grand scheme unless it happened on all 5 flights, but only 1 is Canary
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