Find Cheapest Airlines Flying from San Francisco to Denver

Choose from 1 carriers that fly from San Francisco to Denver, including United Airlines, Enjoy the cheapest tickets on this route with Frontier Airlines.
United Airlines logo United Airlines
Airlines are determined based on actual purchased flight tickets from San Francisco to Denver according to previous 12 months data from Trip.com.

Explore the cheapest flights from San Francisco to Denver 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$ 85.

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

San Francisco to Denver Flight Details

The distance between San Francisco and Denver is approximately 1,554.75km. It takes around 3 hours 1 minute on average to fly from San Francisco to Denver. 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$ 85
Off-season for travelOctober
Peak season for travelJuly
Flight distance1,554.75km
Average flight time3 hours 1 minute
Popular airlineUnited Airlines
Flight statistics for the San Francisco–Denver route are based on aggregated booking data from Trip.com over the past 12 months.

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

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

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

According to Trip.com's data, the cheapest month for flights from San Francisco to Denver is April, with an average price of AU$ 165. Conversely, the most expensive month is typically July, with an average price of up to AU$ 320.

AU$ 320
AU$ 243
AU$ 165
AU$ 88
    Cheapest
  • AU$ 179
    Mar
  • AU$ 165
    Apr
  • AU$ 176
    May
  • AU$ 252
    Jun
  • AU$ 320
    Jul
  • AU$ 300
    Aug
  • AU$ 247
    Sep
  • AU$ 219
    Oct
  • AU$ 297
    Nov
  • AU$ 276
    Dec
  • AU$ 265
    Jan
  • AU$ 273
    Feb

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

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

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

AU$ 279
AU$ 216
AU$ 152
AU$ 89
    Cheapest
  • AU$ 255
    Mon
  • AU$ 229
    Tue
  • AU$ 152
    Wed
  • AU$ 214
    Thu
  • AU$ 279
    Fri
  • AU$ 247
    Sat
  • AU$ 265
    Sun

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

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

During Good Friday, the cheapest flights from San Francisco to Denver are on Apr 1, with the lowest fare of AU$ 80.

AU$ 171
AU$ 126
AU$ 80
AU$ 35
    Cheapest
  • AU$ 102
    Mar 30
  • AU$ 82
    Mar 31
  • AU$ 80
    Apr 1
  • AU$ 163
    Apr 2
  • AU$ 171
    Apr 3
  • AU$ 132
    Apr 4
  • AU$ 90
    Apr 5

Flight FAQs

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

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as AU$ 42 on Cheapest nonstop routes (e.g. SFO to DEN on Tue, Apr 28), while Frontier Airlines offers Cheapest nonstop round-trips from AU$ 85 departing on Sat, Apr 18 and returning on Sat, Apr 25.
  • At the moment, you can catch a direct flight from San Francisco to Denver with the following airlines, including: United 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 1 minute to fly from San Francisco (SFO) to Denver (DEN).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Francisco to Denver 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 66 flight per week flying from San Francisco to Denver. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA2436 (19:03)
  • To find best deals on flights from San Francisco to Denver, 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 Tue, Apr 28, 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 Denver travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from San Francisco to Denver is October, when demand for travel is lower.
  • After crunching the numbers on our March flight calendar, it's currently cheapest to fly from San Francisco to Denver on March 10, 2026 with Frontier Airlines, with prices starting at AU$ 68.
  • You can land at any one of the following hubs in Denver, with San Francisco International Airport to Denver International Airport (SFO-DEN) is by far the most common option on this route: Rocky Mountain Metropolitan Airport (BJC) Denver International Airport (DEN).
  • The time difference between Denver and San Francisco 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 San Francisco toDenver

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

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

Based on Trip.com data from the past 12 months, Delta Air Lines offers the cheapest nonstop flights from San Francisco to Denver, with an average price of AU$ 173.

AU$ 173
AU$ 380
AU$ 587
AU$ 794
Delta Air Lines
AU$ 173
Delta Air Lines
Frontier Airlines
AU$ 188
Frontier Airlines
United Airlines
AU$ 408
United Airlines
American Airlines
AU$ 794
American Airlines

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

Data is based on the number of flights from San Francisco to Denver 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 San Francisco to Denver, with 73 flight per week.

0
16
45
73
United Airlines
73
United Airlines
Air Canada
68
Air Canada
Air New Zealand
68
Air New Zealand
Virgin Australia
68
Virgin Australia
All Nippon Airways
16
All Nippon Airways

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

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

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

248
212
176
140
Highest
185
Mon
180
Tue
176
Wed
192
Thu
235
Fri
248
Sat
219
Sun