San Francisco to Cancun in December 2026
SFO to CUN · Round trips departing in December · Economy · Prices per person in USD
Prices updated
Buy now or wait? We're still learning this route. We have 2 days of prices so far and need about a week to say whether to book or wait.
Not ready to book? Get an email when December fares drop below your price.December 2026 by departure day
Cheapest round trip leaving that day| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 1 $512 | 2 | 3 | 4 | 5 | 6 | |
| 7 | 8 | 9 | 10 $509 | 11 $516 | 12 | 13 |
| 14 | 15 | 16 | 17 | 18 $684 | 19 | 20 |
| 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 28 | 29 | 30 | 31 |
Empty days: no round trip found for that departure date yet. Green = cheapest third of the month.
Cheapest dates in December 2026
Round trip, per person-
Dec 10 – 13 3 nights · leave Thu$509Aeromexico 2 stops · 7h 06mBook
-
Dec 1 – 4 3 nights · leave Tue$512Southwest Airlines 2 stops · 8h 50mBook
-
Dec 11 – 18 7 nights · leave Fri$516Frontier Airlines 2 stops · 6h 59mBook
-
Dec 18 – 25 7 nights · leave Fri$684Frontier Airlines 2 stops · 7h 03mBook
-
Dec 18 – 26 8 nights · leave Fri$740Frontier Airlines 2 stops · 7h 03mBook
Prices change often. The booking site shows the final price before you pay.
Cheapest by trip length
Good to know for December
December vs other months
Cheapest round trip per departure month| Month | Cheapest round trip |
|---|---|
| October 2026 | No fares found yet |
| November 2026 | $503 |
| December 2026 | $509 |
| January 2027 | No fares found yet |
| February 2027 | $515 |
| March 2027 | $495 (cheapest month) |
| April 2027 | No fares found yet |
| May 2027 | No fares found yet |
| June 2027 | No fares found yet |
| July 2027 | $955 |
San Francisco to Cancun in December: questions
What's the cheapest date to fly from San Francisco to Cancun in December 2026?
Leaving Thursday, December 10 and returning Sunday, December 13 (3 nights) for $509 round trip on Aeromexico, the cheapest of the 5 date combinations we track that month.
How much is a round trip from San Francisco to Cancun in December 2026?
From $509. Half of the 5 date combinations we track are under $516. Prices are per person in USD and change often.
Is December a cheap month to fly from San Francisco to Cancun?
It ranks 3 of 5 months we have prices for. The cheapest month is March 2027, from $495.