What Is a Route Focus in Airline Operations?

A route focus (or focus city) is a geographic market where an airline concentrates a high frequency of flights—typically its base or a region where it holds significant market share. Unlike a hub (where banks of flights connect for transfers), a focus city emphasizes point-to-point service, though some connecting traffic may occur.

Why Airlines Establish Route Focuses

• Resource Concentration: Deploy aircraft, crews, and marketing where returns are highest.
• Brand Loyalty: High frequency builds awareness and repeat business.
• Barrier to Entry: Dominant schedule deters competitors.
• Operational Efficiency: Simplified scheduling, maintenance, and crew basing.

Selection Factors

• Population and economic activity
• Origin & destination (O&D) demand
• Competitive landscape
• Airport infrastructure and costs
• Airline's fleet and network strategy

Examples

• United: Chicago (ORD), Denver (DEN), Houston (IAH), Newark (EWR), San Francisco (SFO), Washington (IAD), Los Angeles (LAX) — hubs; focus cities include Cleveland, San Antonio.
• Delta: Atlanta (ATL), Detroit (DTW), Minneapolis (MSP), Salt Lake City (SLC), NYC (LGA/JFK), LAX, Seattle (SEA) — hubs; focus: Raleigh-Durham, Boston.
• Southwest: Point-to-point network; focus cities: Baltimore (BWI), Chicago (MDW), Denver, Las Vegas, Phoenix.

Focus cities are strategic anchors in an airline's network, distinct from but complementary to hubs.