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prices we've seen · United States fares · USD

Flights from Denver (DEN) to San Francisco (SFO)

  • One way from $69
  • Round trip from $145
  • Nonstop on 4 of 4 dates
  • Fastest 2h 53m
  • 1 airline

The cheapest one-way fare from Denver (DEN) to San Francisco (SFO) we have seen is $69 USD, departing Dec 23, 2026 (seen Nov 7, 2026): Frontier F9 2797, 1 stop, 9h 11m.

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Prices are the fare alone; the seller shows the bag and fare rules.

Cheapest by month

Checked Nov 11

Pick a month to search the day its cheapest fare leaves.

  1. Nov 2026$130
  2. Dec 2026$69

Cheapest days to fly one wayCheapest round trips

Each day's cheapest fare we've seen, nonstop and with stops. Cheapest first.

We may earn a commission from the seller · How we rank

  1. WedDec 23

    08:54

    9h 11m1 stop

    17:05

    Cheapest$69 USD

    Frontier F9 2797 · seen Nov 7

    Go to seller — $69

  2. WedDec 23

    22:42

    2h 53mNonstop

    00:35+1

    $80 USD

    Frontier F9 3439 · seen Nov 7

    Go to seller — $80

  3. TueNov 24

    06:42

    5h 19m1 stop

    11:01

    $130 USD

    Frontier F9 2015 · seen Nov 9

    Go to seller — $130

  4. WedNov 25

    22:01

    17h 55m1 stop

    14:56+1

    $139 USD

    Frontier F9 4251 · seen Nov 10

    Go to seller — $139

  5. SunDec 27

    22:42

    2h 53mNonstop

    00:35+1

    $151 USD

    Frontier F9 3439 · seen Nov 5

    Go to seller — $151

  6. WedNov 25

    18:31

    2h 57mNonstop

    20:28

    $222 USD

    Frontier F9 3435 · seen Nov 10

    Go to seller — $222

  7. TueNov 24

    07:46

    2h 58mNonstop

    09:44

    $222 USD

    Frontier F9 1229 · seen Nov 9

    Go to seller — $222

The cheapest round trips we've seen on this route, on any dates, cheapest first.

We may earn a commission from the seller · How we rank

  1. 18 nightsDec 25 – Jan 12

    08:54

    SFO

    Cheapest$145 USD

    Frontier F9 3155 · 2 stops · 23h 34m in all, both ways · seen Nov 8

    Go to seller — $145

  2. 2 nightsDec 11–13

    17:35

    19:31

    $148 USD

    Frontier F9 1093 · 1 stop · 13h 56m in all, both ways · seen Nov 8

    Go to seller — $148

  3. 18 nightsDec 25 – Jan 12

    18:32

    20:28

    $171 USD

    Frontier F9 1093 · Nonstop · 5h 38m in all, both ways · seen Nov 8

    Go to seller — $171

  4. 2 nightsDec 11–13

    07:39

    09:39

    $224 USD

    Frontier F9 1229 · Nonstop · 5h 38m in all, both ways · seen Nov 8

    Go to seller — $224

  5. 5 nightsNov 24–29

    13:03

    SFO

    $297 USD

    Frontier F9 4967 · 1 stop · 25h 33m in all, both ways · seen Nov 7

    Go to seller — $297

  6. 5 nightsNov 24–29

    18:31

    20:28

    $388 USD

    Frontier F9 1093 · Nonstop · 5h 32m in all, both ways · seen Nov 7

    Go to seller — $388

  7. 1 nightNov 10–11

    22:29

    00:20+1

    $701 USD

    Frontier F9 3439 · Nonstop · 5h 27m in all, both ways · seen Nov 10

    Go to seller — $701

Compare other routes

Compared with Denver → San Francisco: $69 one way (Dec 23).

The way back

Other places from Denver

Every route from Denver →

To San Francisco from other cities

Every route to San Francisco →

Airlines seen on this route

  • Frontier

Marketing carriers; the operating airline is shown by the seller.

Denver to San Francisco in numbers

  • By month, Dec 2026 is the cheapest we've seen at $69 USD and Nov 2026 the most expensive at $130 USD — a spread of 88%.
  • Nonstop fares were seen on 4 of the 4 departure dates; carriers seen: Frontier.
  • DEN serves Denver, United States; SFO serves San Francisco, United States.
  • San Francisco runs 1 hour behind Denver.

Questions

What is the cheapest fare from Denver (DEN) to San Francisco (SFO)?

The cheapest one-way fare from Denver (DEN) to San Francisco (SFO) we have seen is $69 USD, departing Dec 23, 2026 (seen Nov 7, 2026): Frontier F9 2797, 1 stop, 9h 11m.

Is there a nonstop flight from Denver (DEN) to San Francisco (SFO)?

Nonstop fares were seen on 4 of the 4 departure dates; carriers seen: Frontier.

Which month is cheapest to fly from Denver (DEN) to San Francisco (SFO)?

By month, Dec 2026 is the cheapest we've seen at $69 USD and Nov 2026 the most expensive at $130 USD — a spread of 88%.

How old is this price?

It is the cheapest fare we've seen for that date; the date beside it is the day it was seen, or our last check. We look again at least once a day for the routes people search, and stop showing a route's prices two days after our last look. The seller's page shows the price right now.

How does a2bflight rank results?

By price and duration only; commission never enters the order. Cheapest means cheapest among the fares we've seen for this route. A click that books may earn a2bflight a commission from the seller; the price you see is the seller's own. See how we rank and what we keep.