$163 Cheap United flights from Seattle to Cancun (SEA to CUN)

Find The Best Day To Fly from Seattle to Cancun

Amazing United SEA to CUN Flight Deals

The cheapest flights to Cancun Intl. found within the past 7 days were $354 round trip and $163 one way. Prices and availability subject to change. Additional terms may apply.

Sat, Sep 6 - Sat, Sep 13

SEA

Seattle

CUN

Cancun

$354

Roundtrip

found 8 hours ago

Sat, Sep 6 - Sat, Sep 13

SEA

Seattle

CUN

Cancun

$359

Roundtrip

found 8 hours ago

Thu, Sep 18 - Mon, Sep 22

SEA

Seattle

CUN

Cancun

$361

Roundtrip

found 3 hours ago

Wed, Sep 17 - Wed, Oct 8

SEA

Seattle

CUN

Cancun

$366

Roundtrip

found 3 days ago

Wed, Sep 17 - Wed, Oct 8

SEA

Seattle

CUN

Cancun

$369

Roundtrip

found 3 days ago

CUN From SEA Economy Coach Packages on Similar Airlines

Price found within the past 48 hours. Click for updated prices.

Ventus Ha at Marina El Cid Spa & Beach Resort

per person

Sep 27 - Oct 5

found 16 hours ago

Roundtrip flight included

Seattle (SEA) to Cancun (CUN)

Ventus at Marina El Cid Spa & Beach Resort - All Inclusive

per person

Sep 5 - Sep 13

found 1 day ago

Roundtrip flight included

Seattle (SEA) to Cancun (CUN)

Palmar Beach Resort and Spa Riviera Maya - All Inclusive

per person

Sep 5 - Sep 13

found 1 day ago

Roundtrip flight included

Seattle (SEA) to Cancun (CUN)

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Frequently asked questions

Can I catch a flight from Seattle - Tacoma Intl. Airport (SEA) to Cancun Intl. Airport (CUN) right now?

For any current Cancun Airport quarantine requirements and travel advice, go to our Covid-19 Travel Advisor. Look before you arrange your flight, so you don't get caught out.

What terminal is United Airlines at Sea-Tac Airport?

As soon as you're given your ticket for your United Airlines flight from Seattle - Tacoma Intl. Airport (SEA) to Cancun Intl. Airport (CUN), check if the terminal details are on it. If not, you might like to ask your air carrier. They'll be able to advise where you'll be flying into and out of.

Are there United Airlines non-stop flights from SEA to CUN?

If you want to fly with United Airlines from Seattle - Tacoma Intl. Airport (SEA) to Cancun Intl. Airport (CUN), you'll have to make at least one stop. While waiting for your connection, use the time to enjoy a bite to eat or go for a stroll.

How long is a United Airlines flight from SEA to CUN?

As it will take about 6 hours and 29 minutes for your United Airlines flight to head from SEA to Cancun Airport, think about tossing a few travel games in your hand luggage. You never know --- the person next to you might love the chance to play to break up the trip.

How many direct and indirect flights does United Airlines fly from SEA to CUN?

When jetting from SEA to CUN, you'll find roughly 3 United Airlines daily flights to choose from.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to Cancun Airport, please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Thursdays tend to be the cheapest, according to flight demand on Travelocity in 2021. Tuesday and Wednesday prices are also good, but you may want to prepare your budget if booking during the weekend, as data shows that is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2021, flights departing on a Monday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2021 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 0-2 weeks prior to their travel dates.*According to flight demand on Travelocity.com from January to December 2021. Savings are subject to change based on departure location, date and destination.

Discover our best United flight from Seattle SEA to Cancun CUN

To find the best deals on flights to Seattle from Cancun with United, just enter your travel dates, filter by United, and hit search. You’ll find flights to choose from and can sort by price, flight duration, and arrival or departure time.

Return flights from Seattle SEA to Cancun CUN with United

If you’re planning a round trip, booking return flights with United is usually the most cost-effective option. With airfares ranging from $354 to $369, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply.

Book one-way United flights from Seattle SEA to Cancun CUN

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way United flight from Seattle to Cancun costs from $163. Prices and availability subject to change. Additional terms may apply.

The easy way to find cheap flights to Cancun CUN from Seattle SEA with United

To find a cheap United flight from Seattle SEA to Cancun CUN, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference.

How to find our best airfare deals on United flights from Seattle SEA to Cancun CUN

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as September, or if you book a flight with a stopover.

Find nonstop flights from Seattle SEA to Cancun CUN with United

If you’re keen to be on Cancun soil fast, don’t waste time with a stopover—filter your search results to show direct United flights only. The journey takes around hour(s) min(s) – so you’ll be there before you know it.

Flexible airline tickets for United flights from Seattle SEA to Cancun CUN

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.

There are a lot of reasons to book your flights to Cancun CUN from Seattle SEA with United on Travelocity

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.

United Airports
Airport code	Country	Airport name	Number of flights
ORD	USA	O'Hare Intl.	227
DEN	USA	Denver Intl.	226
IAH	USA	George Bush Intercontinental	136
IAD	USA	Washington Dulles Intl.	100
SFO	USA	San Francisco Intl.	64
LAX	USA	Los Angeles Intl.	23
EWR	USA	Liberty Intl.	20
FRA	DEU	Frankfurt Intl.	19
NRT	JPN	Narita Intl.	19
PEK	CHN	Capital Intl.	16

Travelers ❤️ these 🏨 after their flight to Cancun

Hyatt Vivid Grand Island Cancun Adults Only All-Inclusive

Boulevard Kukulcan Km.16.5 Lotes 56-A-I, y 56-A-2 Segunda Etapa Turistica, Cancun, QROO

This property features 10 restaurants, 2 outdoor pools, and a gym. Unwind with a drink at one of the 2 poolside bars and enjoy free perks like valet parking ...

8.6/10 Excellent! (1,270 reviews)

"It’s a beautiful resort. However no direct beach access but they do shuttle their guest to the beach club. The food isn’t very good at all. Typical resort all inclusive food that look beautiful but not so much on the taste. The Japanese place is the better place."

Reviewed on Jul 10, 2025

Haven Riviera Cancun - All Inclusive - Adults Only

Ctra. Federal 307, Chetumal - Pto, Juarez, KM 335, Puerto Morelos, Cancun, QROO

This all-inclusive property features a full-service spa, a nightclub, and 7 restaurants. Relax with free beach cabanas and sun loungers, and cool off with a ...

9.2/10 Wonderful! (4,521 reviews)

"The property was beautiful, rooms clean and modern. Pools were great and activities during the day and entertainment in the evening as well as the night club. Almost all of the staff were fun, helpful and accommodating. The beach and the pools had lots of options for free loungers and cabanas compared ..."

Reviewed on Jul 11, 2025

Secrets The Vine Cancun - Adults Only - All Inclusive

Blvd. Kukulcan km. 14.5 Retorno Del Rey, Lot 38 & 38-b, Zona Hotelera, Cancun, QROO

This smoke-free property features a full-service spa, 4 outdoor pools, and a restaurant. Relax with beach cabanas and sun loungers, and cool off with a drink ...

8.6/10 Excellent! (1,846 reviews)

"5 stars"

Reviewed on Jul 11, 2025

Lowest nightly price found within the past 24 hours based on a 1 night stay for 2 adults. Prices and availability subject to change. Additional terms may apply.

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*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.