Airbus has snubbed an effort by Ryanair, the low-cost airline, to draw it into a bidding contest against Boeing for the carrier’s next multi-billion dollar order for several hundred short-haul jets.

The European aircraft maker is unwilling to contemplate the scale of discounts being sought by Ryanair, which has established a reputation as one of the most aggressive negotiators of low-cost supply deals in the global aviation industry.