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Cheap flights from San Francisco to Cancún from £125

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — CUN
3 Dec — 10 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from San Francisco to Cancún

Enter your travel dates to find the best prices.

Cheapest flights from San Francisco to Cancún
Explore the most affordable flight options available from San Francisco to Cancún. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 3 November 2025.

Tue 9/1208:59SFO - CUN
Nonstop5h 21mUnited Airlines
Sat 20/1217:00CUN - SFO
Nonstop6h 03mUnited Airlines
Deal found 1/11£274
Sun 30/1123:01SFO - CUN
Nonstop5h 12mUnited Airlines
Sat 24/108:39CUN - SFO
1 stop9h 17mUnited Airlines
Deal found 3/11£274
Mon 8/1222:24SFO - CUN
1 stop13h 26mAlaska Airlines
Sat 13/1217:55CUN - SFO
Nonstop6h 00mAlaska Airlines
Deal found 1/11£277
Wed 3/1208:15SFO - CUN
1 stop10h 05mDelta
Wed 10/1207:50CUN - SFO
1 stop16h 30mDelta
Deal found 3/11£278
Sat 29/1108:27SFO - CUN
Nonstop5h 13mAlaska Airlines
Fri 5/1219:55CUN - SFO
1 stop14h 34mAlaska Airlines
Deal found 2/11£281
Sun 30/1123:01SFO - CUN
Nonstop5h 12mUnited Airlines
Sun 7/1217:55CUN - SFO
1 stop9h 04mUnited Airlines
Deal found 2/11£284
Sun 7/1200:30SFO - CUN
1 stop11h 45mDelta
Sat 13/1219:00CUN - SFO
1 stop15h 30mDelta
Deal found 1/11£285
Fri 28/1110:39SFO - CUN
2 stops10h 45mDelta
Tue 2/1207:00CUN - SFO
2 stops13h 40mDelta
Deal found 2/11£286
Sun 30/1108:27SFO - CUN
Nonstop5h 13mAlaska Airlines
Sun 14/1219:55CUN - SFO
1 stop24h 38mAlaska Airlines
Deal found 2/11£287
Tue 2/1208:59SFO - CUN
Nonstop5h 21mUnited Airlines
Tue 9/1213:35CUN - SFO
Nonstop6h 03mUnited Airlines
Deal found 2/11£289
Sat 6/1220:31SFO - CUN
1 stop17h 34mAlaska Airlines
Sat 13/1217:55CUN - SFO
Nonstop6h 00mAlaska Airlines
Deal found 2/11£293

Cheap flight deals from San Francisco to Cancún

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) to Cancún (CUN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 3 November 2025.

Round-trip from

£274

One-way from

£125

Popular in

December

Cheapest in

January

Average price

£510
United Airlines
  • United Airlines
  • 9/12-20/12
  • Nonstop
  • 11h 15m total
  • San Francisco to Cancún
Search Deals
United Airlines
  • United Airlines
  • 15/12
  • 1 total stop
  • 12h 14m total
  • San Francisco to Cancún
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (£17 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Francisco to Cancún that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 November 2025.
Use the filters below to find and compare flights from San Francisco to Cancún that are best for you.

Fly from

San Francisco

Fly to

Cancún

Route

Depart

Return

Price

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 23/1

08:59-17:20

Nonstop5h 21m

Cancun

Tue 27/1

17:50-20:53

Nonstop6h 03m

£274

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 23/1

21:30-13:00

2 stops12h 30m

Cancun

Tue 27/1

12:35-19:59

1 stop10h 24m

£281

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 28/11

23:01-07:13

Nonstop5h 12m

Cancun

Tue 9/12

17:55-23:59

1 stop9h 04m

£281

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Sat 31/1

08:25-16:45

Nonstop5h 20m

Cancun

Tue 3/2

18:15-21:25

1 stop30h 10m

£286

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 23/1

06:00-17:45

1 stop8h 45m

Cancun

Sat 31/1

06:01-11:51

1 stop8h 50m

£293

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 20/2

06:00-18:08

1 stop9h 08m

Cancun

Sat 28/2

08:38-19:59

1 stop14h 21m

£293

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 30/1

00:47-16:20

2 stops12h 33m

Cancun

Sat 7/2

18:55-07:30

1 stop15h 35m

£303

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 27/2

18:50-17:10

1 stop19h 20m

Cancun

Sat 7/3

17:31-20:31

Nonstop6h 00m

£308

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Sat 13/12

07:00-15:24

Nonstop5h 24m

Cancun

Tue 16/12

13:35-16:38

Nonstop6h 03m

£313

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Mon 16/3

23:59-14:24

1 stop12h 25m

Cancun

Wed 18/3

10:40-23:33

1 stop14h 53m

£323

Flights are sorted by cheapest return flights first.

Deals found on 1/11

Showing 1-10 of 21 results
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Best time to book a flight from San Francisco to Cancún

Have a flexible travel schedule? Discover the best time to fly to Cancún from San Francisco with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from San Francisco to Cancún

How far ahead should I book a flight from San Francisco to Cancún?

Use this chart to determine the optimal time to book a return flight from San Francisco to Cancún. Price data was last updated on 31 October 2025.

Booking 28 days in advance of your planned departure date is, on average, the best time to get cheap flights from San Francisco to Cancún. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from San Francisco to Cancún?

Currently, May is the cheapest month in which you can book a flight from San Francisco to Cancún (average of £123). Flying from San Francisco to Cancún in December is currently the most expensive (average of £252). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SFO to CUN?

Find hourly flight availability from San Francisco to Cancún. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 3 November 2025.

It’s optimal to fly from San Francisco to Cancún at midday. By choosing this option you can save up to 67% on the cost of your flight, compared to a flight in the evening.

Reviews of airlines servicing Cancún

Get insights into the airlines that provide service to Cancún. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Cancún. Reviews last updated 3 November 2025.
See what other customers who have flown with United Airlines from San Francisco to Cancún have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,997 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,997 reviews
United Airlines
7.4
Good
8,997 reviews
Check prices

Crew

8.1

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Comfort

7.3

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from San Francisco to Cancún. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from San Francisco to Cancún?

    If you book a flight from San Francisco to Cancún, you will be flying from San Francisco to Cancun. Flights to Cancun (CUN) from San Francisco (SFO) take 5h 13m for a nonstop flight. There are 2 flights from San Francisco to Cancún per day from 1 airline.

  • How popular is this San Francisco to Cancún flight route?

    Within the past month, 2 users have taken a look at flights from San Francisco to Cancun.

  • How long is the flight from San Francisco to Cancún?

    There are many flights that can get you from San Francisco to Cancún in 5h 20m. Fly via United Airlines, Delta, or Alaska Airlines to get the fastest option. San Francisco and Cancún are separated by a distance of 2404 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What is the cheapest airline to fly from San Francisco to Cancún round-trip?

    Flying on United Airlines is currently your cheapest option to Cancún, with prices starting at £429. United Airlines is currently priced 10% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from San Francisco to Cancún one-way?

    The cheapet airlines for a one-way flight from San Francisco to Cancún are Delta (£125), Alaska Airlines (£125), and United Airlines (£136).

  • Can I find deals for flights from San Francisco to Cancún that include hotel bookings?

    Yes. In addition to deals on San Francisco to Cancún flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Francisco to Cancún?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from San Francisco to Cancún.

  • Can I find deals for business class flights from San Francisco to Cancún?

    Yes. Cheapflights offers flight deals from San Francisco to Cancún by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from San Francisco to Cancún?

    Currently, May is the cheapest month in which you can book a flight from San Francisco to Cancún (average of £123). Flying from San Francisco to Cancún in December is currently the most expensive (average of £252). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Travelling to a place near Cancún?

Book flights to Cancún if you plan to visit one of these locations
Holbox

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Alternative routes for San Francisco to Cancún

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Cancún flights

Top airline flying from San Francisco to Cancún

Discover the top airline that operate flights from San Francisco to Cancún. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 3 November 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£429Average£563FlexibilityNo cancel feeOn-time69%
Search United Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from San Francisco to Cancún?

When you search for this flight from San Francisco to Cancún, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from San Francisco to Cancún?

Millions of users choose and trust Cheapflights to book the best flight deals from San Francisco to Cancún for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from San Francisco to Cancún with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from San Francisco to Cancún flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from San Francisco to Cancún become cheaper?

Not ready to book yet? You can track prices for flights from San Francisco to Cancún on Cheapflights with our Price Alert feature and get notified when better prices are available.

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