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Cheap flights from San Francisco to Cancún

The cheapest round trip from San Francisco to Cancún that travelers found recently is $329 with a carry-on: a $329 fare on United, which usually includes a carry-on. It leaves Sun, Jan 10 and comes back Sun, Jan 17.

Live prices for Sun, Jan 10 to Sun, Jan 17

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$329Cheapest round trip, carry-on included (est.)
$423Typical round trip found recently
JanuaryCheapest month in the next few, from $329
0%Of these fares are nonstop

Cheapest trips travelers found recently

LeaveReturnAirlineAirportsStopsFareCarry-on (est.)TotalLive prices
Sun, Jan 10Sun, Jan 17UnitedSFO → CUN1 stop$329Included$329Live price
Thu, Feb 18Mon, Feb 22American AirlinesSFO → CUN1 stop$337Included$337Live price
Tue, Dec 1Sat, Dec 5American AirlinesSFO → CUN1 stop$357Included$357Live price
Tue, Dec 1Tue, Dec 8American AirlinesSFO → CUN1 stop$373Included$373Live price
Fri, Dec 11Fri, Dec 18American AirlinesSFO → CUN1 stop$387Included$387Live price
Mon, Jan 4Sat, Jan 9American AirlinesSFO → CUN1 stop$388Included$388Live price
Tue, Dec 1Mon, Dec 14American AirlinesSFO → CUN1 stop$397Included$397Live price
Sun, Nov 8Sat, Nov 14American AirlinesSFO → CUN1 stop$423Included$423Live price
Mon, Nov 30Sun, Dec 6SouthwestSFO → CUN2 stops$446Included$446Live price
Mon, Nov 9Sun, Nov 15UnitedSFO → CUN2 stops$458Included$458Live price

Round-trip prices per person, from real fares travelers found in the last few days. Carry-on fees are our estimate for each airline, both ways. Prices change fast: check the live price before you book.

Cheapest month to fly

MonthCheapest tripFromLive prices
November 2026Sun, Nov 8 to Sat, Nov 14, 6 nights$423Live price
December 2026Tue, Dec 1 to Sat, Dec 5, 4 nights$357Live price
January 2027Sun, Jan 10 to Sun, Jan 17, 7 nights$329Live price
February 2027Thu, Feb 18 to Mon, Feb 22, 4 nights$337Live price

Bag fees on this route

What the airlines flying San Francisco to Cancún usually charge for one bag each way. Budget airlines often sell the cheapest fares and charge the most for bags, so compare the total, not the fare.

AirlineCarry-on, each wayChecked bag, each way
American AirlinesIncluded$40
Frontier$55$50
SouthwestIncluded$35
UnitedIncluded$40

Our estimates: fees depend on the fare type and when you pay. Check the airline's own price when you book.

How these prices work

These are real round-trip fares that travelers found on Aviasales recently, not a live search, so they can change or sell out. Dipt adds an estimate of each airline's carry-on fee, so a cheap fare with expensive bags doesn't look cheaper than it is. "Live price" opens Dipt's live flight search for those dates, where you book with the airline or travel site you pick. Dipt may earn a commission when you book, at no extra cost to you (how Dipt makes money).

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