Cheap flights from Seattle to Cancún from $123

If you don’t want to visit Cancún in October, then you should wait until September to fly from Seattle, when ticket prices are also cheap, with an average price of $465.

The cheapest day to depart from Seattle to Cancún is on a Wednesday when prices can be found for as low as $585. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $636. 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 $595. Flights to Cancún are more costly in the evening, with an average ticket price of $956. 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 $560 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 $494 on momondo.

There are 4 cabin classes available to choose from on Seattle to Cancún flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Volaris and Southwest 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 60% 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.

Dallas (DFW) was the most common stop: 30% 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 27m.

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

As of May 2026, there are 21 flights per week flying from Seattle to Cancún. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.