There are fewer big U.S. airlines, they negotiate with fewer companies, and their generosity on discounts has diminished. But airline contracting is still complicated. The market offers several tools to help buyers at large travel programs optimize airline combinations.

Sabre last month revealed plans to refresh the Prism Avion corporate data platform in use by a handful of very large accounts. The company is adding sales and marketing resources and considering user interface and workflow improvements. Sourcing tools are expensive; Sabre is looking at pricing tiers to widen the appeal.

American Express Global Business Travel, BCD Travel, Carlson Wagonlit . . .

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