Route Overview: Denver to San Francisco
Traveling from the Mile High City to the City by the Bay is one of the most popular transcontinental-adjacent corridors in the United States. Whether you are flying for business in Silicon Valley or a leisure trip to see the Golden Gate Bridge, cheap flights from Denver to San Francisco are consistently available due to the high volume of daily service. This route connects two major Western hubs, bridging the Rocky Mountains with the Pacific Coast. When booking through all Faresterminal route guides, you gain access to real-time inventory and expert support by calling 1-800-518-9067.
Flight duration and schedule
A typical DEN to SFO nonstop flight covers the distance in approximately 2 hours and 50 minutes to 3 hours and 45 minutes depending on headwinds. Westbound flights generally take longer due to the prevailing jet stream, while the return journey from SFO to DEN can be as quick as 2 hours and 20 minutes. Flights depart as early as 6:00 AM and continue until approximately 10:30 PM, ensuring flexibility for every schedule.
Nonstop vs one-stop options
While nonstop service is plentiful, some travelers opt for one-stop connections to save on last-minute fares. Common connection points include Salt Lake City (SLC), Las Vegas (LAS), or Phoenix (PHX). However, given that the Denver to San Francisco route is served by multiple daily nonstops, connecting flights are usually only recommended if you are trying to maximize specific frequent flyer miles or if direct flights are sold out during peak holidays.
Distance and typical aircraft
The Great Circle distance between Denver International Airport and San Francisco International Airport is roughly 967 miles. Airlines predominantly utilize narrow-body workhorses for this route, including the Boeing 737 family and the Airbus A320 series. On certain high-demand frequencies, United Airlines may occasionally deploy wide-body aircraft like the Boeing 777 or 787, offering a premium international-style experience on a domestic leg.
Airlines, Alliances and Aircraft on the DEN-SFO Route
United Airlines: The Hub-to-Hub Giant
As both DEN and SFO are major hubs for United Airlines, they dominate the market with 10 to 15 daily nonstop flights. United offers the most frequency and a variety of fare classes, from Basic Economy to United First. Members of the Star Alliance will find this route particularly beneficial for earning Premier Qualifying Points. A live one-way Economy fare found today for 2026-10-05 is $172 on UA (nonstop, about 3h 41m), though prices change daily based on demand.
Southwest Airlines: The Point-to-Point Specialist
Southwest Airlines provides a robust alternative, typically operating out of Terminal C at DEN. Their ‘Bags Fly Free’ policy makes them a favorite for families and skiers moving gear between the Rockies and the Coast. While they do not use a traditional hub model at SFO, they maintain several daily nonstops that are often price-competitive with legacy carriers.
Frontier Airlines: The Low-Cost Choice
For those seeking the absolute lowest base fare, Frontier Airlines often provides ultra-low-cost options. Based in Denver, Frontier serves SFO with varying frequency. Travelers should be mindful of their unbundled pricing model, where carry-on bags and seat assignments incur extra fees. If you need help navigating these fees, our agents at 1-800-518-9067 can assist with your booking.
Cabin classes and seat tips
On this 3-hour flight, seat selection matters. United’s Economy Plus offers extra legroom which is ideal for working on a laptop. If flying Southwest, remember their open-seating policy; checking in exactly 24 hours in advance is crucial to securing an aisle or window seat. For the best views of the Sierra Nevada mountains, sit on the right side of the aircraft when flying West from Denver.
Departure Airport Guide: DEN
Terminals and check-in
Denver International Airport (DEN) is famous for its peaked white roof mimicking the mountains. All check-in counters are located in the Jeppesen Terminal. After security, passengers take an automated underground train to Concourse A, B, or C. United primarily uses Concourse B, while Southwest is located in Concourse C. Ensure you arrive at least 2 hours before departure, as security lines at DEN can be unpredictable.
Getting to the airport
The A-Line commuter rail is the most efficient way to reach DEN from downtown Union Station. It costs approximately $10.50 and takes about 37 minutes. This is often faster than driving during Denver’s rush hour on I-70 or Pena Boulevard.
Parking and rideshare pickup
For those driving, the Economy lots offer a balance of price and proximity. Rideshare services like Uber and Lyft drop off on Level 6 and pick up on Level 5 of the Jeppesen Terminal. If you require specialized assistance or group transport, calling 1-800-518-9067 can help clarify airport logistics before you fly.
Arrival Airport Guide: SFO
Terminals and baggage claim
San Francisco International Airport (SFO) is organized into four terminals. United domestic flights usually arrive at Terminal 3 or International Terminal G. Southwest typically uses Terminal 1 (Harvey Milk Terminal). Baggage claim areas are clearly marked and located on the lower level of each terminal. SFO is known for its excellent dining options and museum-quality art exhibits, so do not rush out if you have time to spare.
Ground transportation into the city
The BART (Bay Area Rapid Transit) train is the premier way to get to downtown San Francisco or the East Bay. The station is located in the International Terminal. A ride to Market Street takes about 30 minutes. Alternatively, rideshares are available from the top level of the domestic parking garage, while taxis line up outside each baggage claim area.
Cheapest Time to Fly and Fare Trends
Best days and months to book
To find cheap flights from Denver to San Francisco, aim to book at least 21 to 30 days in advance. Mid-week departures on Tuesdays and Wednesdays are statistically the most affordable. Avoiding Sunday afternoon returns can save you significantly, as that is when business travelers and weekenders saturate the market.
Typical fare ranges by season
| Season | Typical one-way fare | Notes |
|---|---|---|
| Spring | $120 - $210 | Mild weather, moderate demand. |
| Summer | $180 - $350 | Peak tourist season in SF. |
| Fall | $110 - $190 | Best value; Indian Summer weather. |
| Winter | $95 - $250 | Cheapest outside of holidays. |
How to lock in the lowest fare on Faresterminal
Prices change daily, sometimes hourly. To secure the best rate, use the filters on this page to compare airlines side-by-side. If you see a fare like the $172 on UA, it is wise to book immediately. Our 24/7 support line can also help you find ‘hidden’ fares not always visible on standard search engines.
Baggage Information and Fees
Understanding baggage rules is essential for calculating the true cost of your trip. Below is a summary of typical fees for the major carriers on the DEN to SFO route.
| Airline | Carry-on | First checked bag | Second checked bag |
|---|---|---|---|
| United Airlines | Free* ($0) | $35 - $40 | $45 - $50 |
| Southwest Airlines | Free ($0) | Free ($0) | Free ($0) |
| Frontier Airlines | $50+ | $60+ | $70+ |
| Delta (via connection) | Free ($0) | $35 | $45 |
*Note: United Basic Economy does not allow a full-sized carry-on bag in the overhead bin.
How to avoid baggage fees
The easiest way to avoid fees is to fly Southwest or hold an airline-branded credit card that offers free checked bags. Additionally, wearing your heaviest clothes on the plane and using a personal item that fits under the seat can save you upwards of $80 round-trip on budget carriers.
Weather in San Francisco Through the Seasons
San Francisco weather is famously micro-climatic. While Denver may be sunny and dry, San Francisco can be foggy and cool on the same day.
| Season | Typical weather | What to pack |
|---|---|---|
| Spring | 55-65F, Breezy | Light jacket and scarf. |
| Summer | 60-70F, Foggy | Layers; it is colder than you think. |
| Fall | 65-75F, Sunny | The warmest time of year. |
| Winter | 50-60F, Rainy | Waterproof shell and sweaters. |
Best months to visit
September and October are widely considered the best months to visit San Francisco. The infamous summer fog (Karl the Fog) dissipates, providing clear views of the Golden Gate Bridge and comfortable walking temperatures. This coincides with many local festivals and lower airfares after the summer rush.
Where to Stay in San Francisco
Union Square
The heart of the city’s shopping and theater district. It is centrally located with easy access to BART and the iconic cable cars. Ideal for first-time visitors who want to be in the middle of the action.
Fisherman's Wharf
While touristy, it offers great views of the bay and Alcatraz. It is a good choice for families who want to be near Pier 39 and the maritime history of the city.
The Mission District
Perfect for foodies and those seeking a more local, sunnier vibe. The Mission is known for its incredible murals, world-class burritos, and vibrant nightlife.
Events and Reasons to Visit San Francisco
San Francisco is a cultural powerhouse. Major events include Outside Lands in Golden Gate Park every August, the San Francisco Pride parade in June, and the Chinese New Year Parade, which is one of the largest outside of Asia. Sports fans often fly in to see the Golden State Warriors at the Chase Center or the San Francisco Giants at Oracle Park, widely cited as the most beautiful stadium in baseball. For tech professionals, conferences like Dreamforce draw thousands of travelers from Denver’s growing tech scene annually.
Travel Tips for Denver to San Francisco Flyers
- Download the BART app before landing at SFO for easy mobile ticketing.
- Denver’s altitude means you should hydrate extra before your flight to avoid headaches.
- Always pack a light puffer jacket or windbreaker for San Francisco, regardless of the season.
- Check the SFO flight status frequently; fog can occasionally cause morning ground delays.
- Use TSA PreCheck at DEN; the standard lines can exceed 45 minutes during peak times.
- If flying Southwest, the DEN to SFO flight often boards from the C-gates near the center core.
- Explore the SFO Yoga Room in Terminal 3 if you need to stretch after your flight.
- Book your airport parking at DEN in advance online to save up to 20% off drive-up rates.
Nearby and Related Routes
Travelers looking for West Coast adventures often compare this route with other major city pairings. Popular searches include New York to Los Angeles (JFK-LAX), Los Angeles to New York (LAX-JFK), and San Francisco to Seattle (SFO-SEA). If you are exploring other mountain-to-coast options, consider these related guides:
- Denver to Los Angeles Flights
- Denver to Seattle Flights
- Denver to San Diego Flights
- Atlanta to San Francisco Flights
Whether you are flying Chicago to Miami (ORD-MIA), Dallas to Las Vegas (DFW-LAS), Atlanta to Orlando (ATL-MCO), Newark to Fort Lauderdale (EWR-FLL), or Boston to Washington (BOS-DCA), Faresterminal provides the most accurate data. For personalized booking assistance for Denver to San Francisco flights, call our experts at 1-800-518-9067.