Code of Federal Regulations Title 41. Public Contracts and Property Management § 41.301–10.123(b)(6))?

(a) You may use the 14–hour rule to travel via other than coach-class when:

(b) Scheduled flight time is the flight time between the originating departure point and the ultimate arrival point including scheduled non-overnight time spent at airports during plane changes. Scheduled non-overnight time does not include time spent at the originating or ultimate arrival airports.

(c) If other than coach-class accommodation is authorized based on the 14–hour rule then you will not be eligible for a rest stop en route or a rest period upon arrival at your duty site, in accordance with internal agency procedures pursuant to § 301–70.102(j).