San Francisco to Denver SFO → DEN
San Francisco International Airport (SFO) → Denver International Airport (DEN)
The cheapest return found recently is $161 with Frontier Airlines, 18 Nov – 2 Dec, found yesterday. The cheapest one-way found recently is $205 with Alaska Airlines, 16 Apr 2027, found today.
Return
The cheapest return fare on each of 4 departure dates is usually $155 to $263.
Cheapest return found recently
$161
18 Nov – 2 Dec · Frontier Airlines
San Francisco International Airport (SFO) → Denver International Airport (DEN)
Leaves 5:07 p.m. · Return leaves 8:50 a.m. · 19 h 39 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
$263
16 Nov – 27 Nov · Frontier Airlines
San Francisco International Airport (SFO) → Denver International Airport (DEN)
Leaves 6:02 a.m. · Return leaves 8:37 a.m. · 5 h 33 min of travel, both ways together
out nonstop, back nonstop
found yesterday
Found recently, and the cheapest we hold
$161 18 Nov – 2 Decfound yesterdaySee prices for these dates
$135 17 Nov – 1 Decfound 6 days agoSee prices for these dates
What have prices looked like?
Over 23 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $119 to $265.
23 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 4 departure dates from 16 Nov to 24 Mar 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
Yes. Among 14-night return fares leaving within 3 days of 18 Nov, 17 Nov – 1 Dec costs $135: $26 less than the cheapest found recently.
Frontier Airlines · San Francisco International Airport (SFO) → Denver International Airport (DEN) · out 1 stop, back 1 stop · found 6 days ago
Every date we hold
9 fares on 4 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 16 Nov – 30 Nov | $253 | Frontier Airlines | San Francisco International Airport (SFO) → Denver International Airport (DEN) | out 1 stop, back 1 stop | found 2 days ago | See prices for these dates |
| 17 Nov – 1 Dec | $135 | Frontier Airlines | San Francisco International Airport (SFO) → Denver International Airport (DEN) | out 1 stop, back 1 stop | found 6 days ago | See prices for these dates |
| 18 Nov – 2 Dec | $161 | Frontier Airlines | San Francisco International Airport (SFO) → Denver International Airport (DEN) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 24 Mar 2027 – 30 Mar 2027 | $294 | Frontier Airlines | San Francisco International Airport (SFO) → Denver International Airport (DEN) | out nonstop, back nonstop | found yesterday | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $135.
Airlines on the cheapest dates: Frontier Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$205
16 Apr 2027 · Alaska Airlines
San Francisco International Airport (SFO) → Denver International Airport (DEN)
Leaves 6:00 a.m. · 4 h 34 min trip
1 stop
found today
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$205 16 Apr 2027found todayOpen this trip
It is also the cheapest one-way we hold, of any age.
What have prices looked like?
Over 23 days, 24 Sept to 18 Oct, the cheapest one-way we saw each day was $60 to $249.
23 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 16 Apr 2027 to compare.
Every date we hold
1 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 16 Apr 2027 | $205 | Alaska Airlines | San Francisco International Airport (SFO) → Denver International Airport (DEN) | 1 stop | found today | Open this trip |
Airlines on the cheapest dates: Alaska Airlines.
Premium cabin fares from San Francisco to Denver
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 18 Nov – 2 Dec in another cabin: Premium economy · Business · First
Today's prices for 16 Apr 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for San Francisco to Denver?
Return
Not enough history yet: in 23 days of return prices, 24 Sept to 18 Oct, fewer than 3 booking ranges had prices on 7 days or more.
One-way
Fares 60 to 89 days before departure were typically 19% lower than 30 to 59 days before departure.
From the cheapest one-way each day between 24 Sept and 18 Oct (23 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 30–59 days | $74 | $74 | +23% | 8 |
| 60–89 days | $60 | $60 | Cheapest seen | 7 |
| 180+ days | $249 | $205 | +315% | 9 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
San Jose → Denver
67 km from San Francisco
$253
$92 more than flying from San Francisco
16 Nov – 27 Nov · SJC → DEN · out 1 stop, back 1 stop
found yesterday
Oakland → Denver
13 km from San Francisco
$280
$119 more than flying from San Francisco
18 Nov – 2 Dec · OAK → DEN · out 1 stop, back 1 stop
found yesterday
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Sacramento → Denver
121 km from San Francisco
$134
$71 less than flying from San Francisco
28 Oct · SMF → DEN · stops unknown
found yesterday
Oakland → Denver
13 km from San Francisco
$226
$21 more than flying from San Francisco
16 Apr 2027 · OAK → DEN · 1 stop
found yesterday
San Jose → Denver
67 km from San Francisco
$226
$21 more than flying from San Francisco
16 Apr 2027 · SJC → DEN · 1 stop
found yesterday
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 18 Nov – 2 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work