Cheap flights from Seattle to Cancún from $167

If you don’t want to visit Cancún in September, then you should wait until October to fly from Seattle, when ticket prices are also cheap, with an average price of $461.

The cheapest day to depart from Seattle to Cancún is on a Monday when prices can be found for as low as $554. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around $625. These prices are subject to change though, so be sure to set up a Price Alert for flights to Cancún.

Our most recent data shows that the best time of day to fly to Cancún is in the morning. Flights from Seattle to Cancún during this time can be as low as $578. Flights to Cancún are more costly in the evening, with an average ticket price of $781. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Seattle/Tacoma Intl to Cancun for the best Seattle/Tacoma Intl - Cancun flight prices

You are more likely to see cheaper flights to Cancún from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Cancún for around $545 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Cancún from Seattle for as low as $469 on momondo.

There are 3 cabin classes available to choose from on Seattle/Tacoma Intl to Cancun flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 8% on your flight if you consider stops on a Seattle to Cancún flight.

As of March 2026, prices for Seattle to Cancún flights are approximately 28% cheaper when compared to flights at the same time last year.

Delta and Alaska Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Cancun

Delta, Alaska Airlines and Aeromexico are the top three most popular airlines that fly to Cancún from Seattle according to our data. Delta is the first choice among our users, with 61% of people opting to fly with this airline when traveling to Cancún. Keep in mind that there are 10 different airlines that fly to Cancún on a routine basis, so you have a few additional options to choose from.

Guadalajara (GDL) was the most common stop: 28% of momondo users choosing 1-stop flights on this route connected there.

Flights via Guadalajara (GDL) offer the lowest average round-trip price of $437.

Flights connecting via Salt Lake City (SLC) have the shortest average one-way travel time: 7h 35m.

Dallas (DFW) has the shortest average layover time for this route: 1h 23m.

The number of flights available between Seattle and Cancún is 3 per day as of March 2026. The most frequent departure time is 7:00AM, with 100% of daily flights leaving at noon.

As of March 2026, there are 26 flights per week flying from Seattle to Cancún. The most common day of the week flights depart is Mon, with 19% of flights taking off on this day.