Cheap Flights from ONT

Colorado Springs (COS)

2026-03-19–2026-03-25 • United • $302 — Save $128 (~27%) Book

2026-03-30–2026-04-07 • Southwest • $336 — Save $90 (~19%) Book

2026-03-16–2026-03-24 • American • $352 — Save $71 (~15%) Book