The resiliency of premium demand among major U.S. airlines shows no signs of waning, and some executives believe the outperformance of high-end products continues to offset softness in the main cabin.

SEOUL—South Korea has selected L3Harris to supply additional airborne early warning (AEW) aircraft under its E-X Phase 2, a KRW3.1 trillion ($2.2 billion) program running through 2032. L3Harris ...