October travel from San Francisco International Airport (SFO) to Denver International Airport (DEN) blends the late-summer warmth of the Bay Area with the early-fall weather shifts in Colorado. SFO experiences fewer fog delays in October, making it a good month for reliable departures; however, Denver may see rapidly changing conditions with crisp days and possible early mountain snow. For the best deals, search for SFO to DEN flights on weekdays, set fare alerts, and consider nonstop services offered by United and Southwest for a quick 2.25–2.75 hour flight. Nearby major cities and destinations served from SFO include San Jose, Oakland, Sacramento, Los Angeles, and Seattle — useful for travelers connecting from other Northern California hubs. Book now to secure cheap flights from San Francisco International Airport (SFO) to Denver International Airport (DEN) in October and take advantage of fall rates.
Arriving at Denver International Airport (DEN) in October delivers access to crisp mountain air, fall color, and lively Oktoberfest events across Denver and nearby towns. Expect cool daytime temperatures and chilly mornings; always pack layers and a light jacket for rapid altitude-related temperature shifts. Use the A Line train, regional shuttle services, or rental cars to reach downtown Denver, Boulder, Fort Collins, Colorado Springs, or Rocky Mountain National Park for leaf-peeping and elk viewing. October demand grows on weekends and during festival dates, so secure flights and ground transport ahead of time to ensure a smooth arrival from San Francisco International Airport (SFO). Book SFO to DEN flights now to lock in the best schedules for your October visit.