SFO to DEN Flight Guide: Compare Rates and Travel Tips

When preparing for your trip from SFO to DEN, there are several practical steps you can take to ensure a comfortable journey. First, because Denver is situated at an elevation of 5,280 feet, it is crucial to begin hydrating well before you board your flight at SFO; the thin, dry air of the mountains can cause dehydration and altitude sickness much faster than the humid air of the California coast. Second, consider the logistical distance of Denver International Airport from the city center; it is located about 25 miles away, so the A-Line commuter train is often your most efficient and cost-effective transportation method, taking you directly to Union Station in just 37 minutes. Third, if you are traveling during the winter for skiing or snowboarding, always verify the specific oversized baggage fees for your airline ahead of time to avoid surprises at the check-in counter. Finally, leave plenty of time to navigate SFO's security, especially during peak morning hours when the airport sees a high volume of transpacific and domestic departures.

Flight prices between San Francisco and Denver tend to peak during two specific times: the height of the summer vacation season in July and August, and the winter ski season which runs from late December through March. For those looking to save money, the shoulder seasons of late spring (April and May) and mid-autumn (October and November) typically offer the lowest fares. During these periods, the weather in both cities is generally pleasant, and airline competition often results in significant discounts for early bookers.