Cheap flights from San Francisco to Cancún from £138

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 29/10. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — CUN
18 Oct — 25 Oct1
1 adult
1 adult, Economy

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 18 September 2025.

Round-trip from

£319

One-way from

£138

Popular in

December

Cheapest in

January

Average price

£428
Delta
  • Delta
  • 19/10-24/10
  • 4 total stops
  • 25h 50m total
  • San Francisco to Cancún
United Airlines
  • United Airlines
  • 29/10
  • Nonstop
  • 5h 21m total
  • San Francisco to Cancún
Highest demand for flights based on searches. 5% potential increase in price (£19 potential increase over avg. return price).
Cheapest flight prices on average. 2% potential price decrease (£8 potential savings vs. average return price).
Average for round-trip flights in September 2025

Find flight deals from San Francisco to Cancún

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 18 September 2025.

Mon 15/1208:46SFO - CUN
1 stop6h 59mAlaska Airlines
Mon 22/1217:59CUN - SFO
Nonstop6h 16mAlaska Airlines
Deal found 16/9£319
Thu 4/1222:19SFO - CUN
1 stop17h 26mAlaska Airlines
Wed 10/1218:15CUN - SFO
1 stop16h 14mAlaska Airlines
Deal found 16/9£319
Tue 30/1200:10SFO - CUN
1 stop11h 05mDelta
Tue 6/115:03CUN - SFO
2 stops24h 42mDelta
Deal found 17/9£322
Sat 4/1023:20SFO - CUN
1 stop11h 13mDelta
Thu 9/1006:00CUN - SFO
1 stop17h 15mDelta
Deal found 18/9£322
Sat 22/1108:59SFO - CUN
Nonstop5h 21mUnited Airlines
Tue 25/1108:39CUN - SFO
1 stop18h 33mUnited Airlines
Deal found 16/9£323
Wed 29/1005:30SFO - CUN
2 stops8h 45mSouthwest
Wed 5/1114:05CUN - SFO
2 stops10h 45mSouthwest
Deal found 16/9£325
Sun 5/1007:25SFO - CUN
1 stop10h 50mDelta
Wed 8/1014:37CUN - SFO
1 stop8h 38mDelta
Deal found 18/9£325
Wed 5/1110:40SFO - CUN
2 stops10h 44mDelta
Mon 10/1117:20CUN - SFO
1 stop9h 35mDelta
Deal found 17/9£326
Wed 5/1105:15SFO - CUN
1 stop12h 03mUnited Airlines
Fri 7/1108:39CUN - SFO
1 stop13h 46mUnited Airlines
Deal found 17/9£327
Mon 13/1000:43SFO - CUN
1 stop7h 21mUnited Airlines
Tue 21/1013:04CUN - SFO
Nonstop5h 47mUnited Airlines
Deal found 15/9£328

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 18 September 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

Tue 16/12

05:00-20:18

1 stop12h 18m

Cancun

Thu 25/12

17:00-20:03

Nonstop6h 03m

£319

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Sun 14/12

00:43-20:18

1 stop16h 35m

Cancun

Fri 19/12

17:00-20:03

Nonstop6h 03m

£319

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 16/1

23:05-12:34

1 stop10h 29m

Cancun

Fri 23/1

14:19-20:15

1 stop8h 56m

£322

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Thu 1/1

08:20-16:49

Nonstop5h 29m

Cancun

Wed 7/1

17:15-08:29

1 stop18h 14m

£323

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Tue 11/11

08:25-00:18

2 stops12h 53m

Cancun

Sun 16/11

06:15-11:55

1 stop8h 40m

£325

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Tue 9/12

00:43-15:59

1 stop12h 16m

Cancun

Thu 25/12

12:28-21:11

1 stop11h 43m

£327

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Sat 4/10

23:20-13:33

1 stop12h 13m

Cancun

Thu 9/10

08:10-21:15

1 stop15h 05m

£333

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Wed 10/12

17:46-18:45

2 stops21h 59m

Cancun

Thu 25/12

09:00-19:36

1 stop13h 36m

£336

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Thu 15/1

23:05-17:20

1 stop15h 15m

Cancun

Sun 18/1

12:15-22:12

2 stops12h 57m

£337

San FranciscoCancún

SFO - CUN

SFOCUN

San Francisco

Fri 9/1

18:50-11:05

2 stops13h 15m

Cancun

Sat 17/1

12:05-22:57

2 stops13h 52m

£340

Flights are sorted by cheapest return flights first.

Deals found on 16/9

Showing 1-10 of 22 results
1
2
3

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 12 September 2025.

Booking 80 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, March is the cheapest month in which you can book a flight from San Francisco to Cancún (average of £317). Flying from San Francisco to Cancún in July is currently the most expensive (average of £985). 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 18 September 2025.

It’s optimal to fly from San Francisco to Cancún in the morning. By choosing this option you can save up to 27% on the cost of your flight, compared to a flight at midday.

How much does it cost for a return flight from San Francisco to Cancún?

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 18 September 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.

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

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??

Entertainment

7.1

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Food

6.6

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 7h 20m for a nonstop flight. There is 1 flight from San Francisco to Cancún per day from 1 airline.

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

  • 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 29m. Fly via United Airlines 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 £367. United Airlines is currently priced 21% below the average price you’ll pay for this route.

  • 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, March is the cheapest month in which you can book a flight from San Francisco to Cancún (average of £317). Flying from San Francisco to Cancún in July is currently the most expensive (average of £985). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Francisco to Cancún

See prices for flight routes from nearby airports that may be better suited for you.

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 18 September 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£367Average£542FlexibilityNo 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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.