Find Cheapest Airlines Flying from Denver to San Francisco

Choose from 2 carriers that fly from Denver to San Francisco, including Frontier Airlines, United Airlines, Enjoy the cheapest tickets on this route with Frontier Airlines.
Frontier Airlines logo Frontier Airlines
United Airlines logo United Airlines
Airlines are determined based on actual purchased flight tickets from Denver to San Francisco according to previous 12 months data from Trip.com.

Explore the cheapest flights from Denver to San Francisco in the next three months. Based on Trip.com's data from the latest 7 days, one-way direct flights start at AU$ 42, and round-trip direct tickets start at AU$ 117.

Displayed flight fares from Denver to San Francisco are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Denver to San Francisco Flight Details

The distance between Denver and San Francisco is approximately 1,554.75km. It takes around 3 hours 5 minutes on average to fly from Denver to San Francisco. Based on Trip.com's data travel demand peaks in July. The off-season for travel is October.

Cheapest one-way flight priceAU$ 42
Cheapest return ticket priceAU$ 117
Off-season for travelOctober
Peak season for travelJuly
Flight distance1,554.75km
Average flight time3 hours 5 minutes
Popular airlineFrontier Airlines
Flight statistics for the Denver–San Francisco route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from Denver to San Francisco

What is the cheapest month for one-way flights from Denver to San Francisco?

Average price of one-way flights from Denver to San Francisco purchased by Trip.com users by month over the past 12 months.

According to Trip.com's data, the cheapest month for flights from Denver to San Francisco is May, with an average price of AU$ 186. Conversely, the most expensive month is typically November, with an average price of up to AU$ 362.

AU$ 362
AU$ 274
AU$ 186
AU$ 98
    Cheapest
  • AU$ 219
    Mar
  • AU$ 187
    Apr
  • AU$ 186
    May
  • AU$ 216
    Jun
  • AU$ 260
    Jul
  • AU$ 274
    Aug
  • AU$ 211
    Sep
  • AU$ 249
    Oct
  • AU$ 362
    Nov
  • AU$ 242
    Dec
  • AU$ 196
    Jan
  • AU$ 256
    Feb

What's the cheapest day to fly from Denver to San Francisco?

Data is based on the average flight price for each day of the week from Denver to San Francisco on Trip.com over the past 12 months.

Based on Trip.com data from the past 12 months, the cheapest day to fly from Denver to San Francisco is Saturday, with average prices lower than on other days. Avoid Friday, as prices are usually highest then.

AU$ 249
AU$ 213
AU$ 177
AU$ 141
    Cheapest
  • AU$ 246
    Mon
  • AU$ 231
    Tue
  • AU$ 209
    Wed
  • AU$ 247
    Thu
  • AU$ 249
    Fri
  • AU$ 177
    Sat
  • AU$ 245
    Sun

When is the cheapest day to fly from Denver to San Francisco during Good Friday?

Data is based on the lowest one-way fares from Denver to San Francisco during Good Friday, sourced from the Trip.com database over the last 3 days.

During Good Friday, the cheapest flights from Denver to San Francisco are on Apr 1, with the lowest fare of AU$ 74.

AU$ 174
AU$ 124
AU$ 74
AU$ 24
  • AU$ 104
    Mar 31
  • AU$ 74
    Apr 1
  • AU$ 146
    Apr 2
  • AU$ 106
    Apr 3
  • AU$ 150
    Apr 4
  • AU$ 174
    Apr 5

Flight FAQs

  • Which airlines offer the cheapest flights from Denver (DEN) to San Francisco (SFO)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as AU$ 42 on Cheapest nonstop routes (e.g. DEN to SFO on Wed, Apr 15), while Frontier Airlines offers Cheapest nonstop round-trips from AU$ 117 departing on Tue, Mar 10 and returning on Thu, Mar 12.
  • At the moment, you can catch a direct flight from Denver to San Francisco with the following airlines, including: Frontier Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 3 hours 5 minutes to fly from Denver (DEN) to San Francisco (SFO).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Denver to San Francisco is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 75 flight per week flying from Denver to San Francisco. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/-/-/-/- -- UA2367 (05:28)
  • To find best deals on flights from Denver to San Francisco, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Wed, Apr 15, with one-way flights priced at just AU$ 42.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for San Francisco travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Denver to San Francisco is October, when demand for travel is lower.
  • After crunching the numbers on our March flight calendar, it's currently cheapest to fly from Denver to San Francisco on March 7, 2026 with Frontier Airlines, with prices starting at AU$ 76.
  • You can land at any one of the following hubs in San Francisco, with Denver International Airport to San Francisco International Airport (DEN-SFO) is by far the most common option on this route: San Francisco International Airport (SFO).
  • The time difference between San Francisco and Denver is 1h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com Airline Insights on Flights from Denver toSan Francisco

Which airlines offer the cheapest nonstop flights from Denver to San Francisco?

Data is based on the average price of all nonstop flights from Denver to San Francisco on Trip.com in the past 12 months.

Based on Trip.com data from the past 12 months, Hawaiian Airlines offers the cheapest nonstop flights from Denver to San Francisco, with an average price of AU$ 134.

AU$ 56
AU$ 134
AU$ 213
AU$ 292
AU$ 370
Hawaiian Airlines
AU$ 134
Hawaiian Airlines
Delta Air Lines
AU$ 173
Delta Air Lines
Frontier Airlines
AU$ 180
Frontier Airlines
United Airlines
AU$ 370
United Airlines

Which airlines operate the most flights from Denver to San Francisco?

Data is based on the number of flights from Denver to San Francisco operated by each airline on Trip.com in the past month.

Based on Trip.com data from the past month, United Airlines operates the most flights from Denver to San Francisco, with 77 flight per week.

0
15
46
77
United Airlines
77
United Airlines
Air New Zealand
68
Air New Zealand
Virgin Australia
68
Virgin Australia
Air Canada
68
Air Canada
avianca
15
avianca

How many flights are there each day from Denver to San Francisco?

The data is based on the flight numbers for each day of the week from Denver to San Francisco within the Trip.com database over the past month.

Based on Trip.com data from the past month, the most flights from Denver to San Francisco depart on Saturday, and the fewest flights depart on Tuesday.

247
213
178
144
Highest
192
Mon
178
Tue
189
Wed
194
Thu
243
Fri
247
Sat
228
Sun