Cheap flights from San Francisco to Cancun from $441 SFO → CUN
San Francisco International Airport (SFO) → Cancun International Airport (CUN)
The cheapest return found recently is $441 with United Airlines, 11 Dec – 18 Dec, found 19 hours ago.
- Cheapest return found recently
- $441, 11 Dec to 18 Dec
- Usual return price
- $405 to $617
- Cheapest month to fly
- December 2026, return fares from $233 found in the last 7 days
- Airlines with nonstop flights
- United Airlines
Return
The cheapest return fare on each of 6 departure dates is usually $405 to $617.
Cheapest return found recently
$441
11 Dec – 18 Dec · United Airlines
San Francisco International Airport (SFO) → Cancun International Airport (CUN)
Leaves 8:54 p.m. · Return leaves 5:43 p.m. · 22 h 46 min of travel, both ways together
out 1 stop, back 1 stop · via Denver International Airport (DEN), Benito Juarez International Airport (MEX) · overnight connection · 8 h connection
found 19 hours ago
Cheapest nonstop return
$614
11 Dec – 18 Dec · United Airlines
San Francisco International Airport (SFO) → Cancun International Airport (CUN)
Leaves 8:45 a.m. · Return leaves 12:08 a.m. · 11 h 26 min of travel, both ways together
out nonstop, back nonstop
found 19 hours ago
Found recently, and the cheapest we hold
$441 11 Dec – 18 Decfound 19 hours agoSee prices for these dates
$233 2 Dec – 8 Decfound 4 days agoSee prices for these dates
What have prices looked like?
Over 50 days, 24 Sept to 12 Nov, the cheapest return we saw each day was $233 to $509.
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 6 departure dates from 21 Nov to 28 Jan 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?
We hold no other 7-night return fares leaving within 3 days of 11 Dec to compare.
Every date we hold
85 fares on 6 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 21 Nov – 27 Nov | $908 | Aeromexico | San Francisco International Airport (SFO) → Cancun International Airport (CUN) | out 1 stop, back 2 stops | found 6 days ago | See prices for these dates |
| 2 Dec – 8 Dec | $233 | Aeromexico | San Francisco International Airport (SFO) → Cancun International Airport (CUN) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 11 Dec – 18 Dec | $431 | Frontier Airlines | San Francisco International Airport (SFO) → Cancun International Airport (CUN) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 24 Dec – 30 Dec | $648 | Frontier Airlines | San Francisco International Airport (SFO) → Cancun International Airport (CUN) | out 2 stops, back 2 stops | found 4 days ago | See prices for these dates |
| 6 Jan 2027 – 13 Jan 2027 | $396 | American Airlines | San Francisco International Airport (SFO) → Cancun International Airport (CUN) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
| 28 Jan 2027 – 31 Jan 2027 | $523 | Frontier Airlines | San Francisco International Airport (SFO) → Cancun International Airport (CUN) | out 2 stops, back 2 stops | found today | See prices for these dates |
Which month looks cheapest?
December 2026 is the cheapest month — from $233.
Airlines on the cheapest dates: Frontier Airlines, Aeromexico, American Airlines.
Premium cabin fares from San Francisco to Cancun
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 11 Dec – 18 Dec in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for San Francisco to Cancun?
Return
Fares 30 to 59 days before departure were typically 33% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 12 Nov (50 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 |
|---|---|---|---|---|
| 0–6 days | $567 | $523 | +48% | 11 |
| 7–13 days | $630 | $532 | +65% | 17 |
| 14–29 days | $453 | $233 | +19% | 22 |
| 30–59 days | $382 | $317 | Cheapest seen | 50 |
| 60–89 days | $412 | $290 | +8% | 41 |
| 90–179 days | $513 | $337 | +34% | 23 |
| 180+ days | $505 | $477 | +32% | 25 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Oakland → Cancun
13 km from San Francisco
$408
$33 less than flying from San Francisco
28 Jan 2027 – 31 Jan 2027 · OAK → CUN · out 1 stop, back 1 stop
found today
San Jose → Cancun
67 km from San Francisco
$575
$134 more than flying from San Francisco
11 Dec – 18 Dec · SJC → CUN · 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.
Live price for these dates
The cheapest return found recently is for 11 Dec – 18 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from San Francisco to Cancun?
The cheapest return found recently is $441 with United Airlines, 11 Dec to 18 Dec, found 19 hours ago. The cheapest return we hold, of any age, is $233 with Aeromexico, 2 Dec to 8 Dec, found 4 days ago. The cheapest return fare on each of 6 departure dates is usually $405 to $617.
What is the cheapest month to fly from San Francisco to Cancun?
December 2026 is the cheapest month for a return, from $233, 2 Dec to 8 Dec, found 4 days ago.
How far ahead should I book a flight from San Francisco to Cancun?
In 50 days of prices between 24 Sept and 12 Nov, return fares 30 to 59 days before departure were typically 33% lower than 0 to 6 days before departure.
Is there a direct flight from San Francisco to Cancun?
Yes, the cheapest nonstop return found recently is $614 with United Airlines, 11 Dec to 18 Dec, found 19 hours ago.
Which airlines have the cheapest flights from San Francisco to Cancun?
Between 21 Nov and 28 Jan 2027, Frontier Airlines has the cheapest return on 3 of the 6 departure dates we hold, Aeromexico on 2 and American Airlines on 1.
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