Southwest and Frontier trim international and leisure networks

· Aviation · United States

Two US low-cost carriers are cutting routes. Southwest Airlines has cancelled three international routes; among them is Baltimore's service to Los Cabos, a gap that Simple Flying said highlights network pruning as Southwest reallocates aircraft to higher-demand leisure routes. Separately, Frontier Airlines has cancelled all flights to 21 destinations, and six of those destinations last saw the carrier in September or October 2026, according to the same outlet. Neither report listed the full route sets or cited financial figures. The cuts come as US discount carriers adjust capacity toward routes they consider more profitable, a shift that can affect airport traffic in secondary markets and travelers' options. For the industry, the moves are a sign of continued network volatility among ultra-low-cost and low-cost operators.

Why it matters：Route cuts by two large US discount carriers show how low-cost airlines are reallocating capacity, which affects airport economics and competition in leisure markets.

Key points

  • Southwest cancelled three international routes, including Baltimore–Los Cabos.
  • Frontier cancelled all flights to 21 destinations.
  • Six of Frontier's dropped destinations last had service in September or October 2026.

Sources (original reporting)

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