Your next trip, last seen at €38
Lowest observedFrontier Airlines · Non-stop · One wayWhen to fly
Explore datesMore dates worth a look
Last seen for 1 traveller on 12 Nov 2026. Check today's price.
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €38, departing 2 Dec 2026 (Last checked: 5 Nov 2026)One-way fareCheck live prices for this route
- Round trip
- €104, departing 5 Dec 2026, back 10 Dec 2026 (Last checked: 12 Nov 2026)
- Non-stop, one way
- €38, departing 19 Jan 2027 (Last checked: 6 Nov 2026)
- Airlines seen
- Frontier Airlines, United Airlines, Southwest Airlines, Alaska Airlines
- Fastest observed flight time
- 2h 30m
- Non-stop
- Yes
About this route
Explore the fares we observed from San Francisco to Denver. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,525 km
- Fastest observed flight time
- 2h 30m
- Airlines seen
- Frontier Airlines, United Airlines, Southwest Airlines, Alaska Airlines
- Alternative airports
- APA
Route-level information; individual journeys vary.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days |
|---|---|
| Frontier Airlines | 51 / 54 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- San Francisco International Airport (SFO) → San Francisco, city gazetteer reference point (37.7749, -122.4194): ≈ 18 km.
- Denver International Airport (DEN) → Denver, city gazetteer reference point (39.7392, -104.9847): ≈ 30 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Observed fares by departure date
| Departure | Fare | Seen on |
|---|---|---|
| €39 | 6 Nov 2026 | |
| €39 | 5 Nov 2026 | |
| €39 | 6 Nov 2026 | |
| €38 | 5 Nov 2026 | |
| €38 | 5 Nov 2026 | |
| €47 | 6 Nov 2026 | |
| €39 | 5 Nov 2026 | |
| €41 | 5 Nov 2026 | |
| €41 | 5 Nov 2026 | |
| €42 | 6 Nov 2026 | |
| €42 | 6 Nov 2026 | |
| €51 | 5 Nov 2026 | |
| €42 | 6 Nov 2026 | |
| €57 | 5 Nov 2026 | |
| €39 | 5 Nov 2026 | |
| €39 | 5 Nov 2026 | |
| €39 | 5 Nov 2026 | |
| €39 | 6 Nov 2026 | |
| €47 | 5 Nov 2026 | |
| €47 | 5 Nov 2026 |
One-way fares. Each row is one price we saw for that departure day on the date shown, not a guaranteed fare.
Frequently asked
How much is a flight from San Francisco to Denver?
The lowest fare Routavio has observed is €38, found on 5 Nov 2026.
Are there direct flights from San Francisco to Denver?
Yes. Published schedules report non-stop flights on this route with Frontier Airlines, United Airlines, Southwest Airlines.
Which airlines fly from San Francisco to Denver?
Routavio has seen these carriers on the route: Frontier Airlines, United Airlines, Southwest Airlines, Alaska Airlines.
How long does the flight from San Francisco to Denver take?
Across the 83 fares Routavio observed, the average journey time is 3h 11m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed San Francisco to Denver fares were non-stop?
78 of the 85 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
How much is a round trip from San Francisco to Denver?
Cheapest round trip: €104, departing 5 Dec 2026, back 10 Dec 2026 (checked 12 Nov 2026).
How much is a non-stop flight from San Francisco to Denver?
Cheapest non-stop one-way fare: €38, departing 19 Jan 2027 (checked 6 Nov 2026).
Which airlines had non-stop offers on at least 3 departure dates from San Francisco to Denver?
For San Francisco to Denver, examples of observed one-way non-stop offers checked within the last 14 days: Frontier Airlines (51). Each number counts distinct departure dates, not weekly flights; check current availability in search.
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.