$192 Find Cheap Flights from Cancun to St. Louis - Compare and Save

Among airlines operating Cancún to St. Louis flights:

• Southwest: offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

3 airlines operate flights between Cancún and St. Louis. The airlines offering nonstop flights on this route include:

• Southwest
• Frontier
• American Airlines

Flights from Cancún to St. Louis usually depart from Cancun (CUN) and arrive at Lambert-St Louis (STL).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag in Economy Class class
• American Airlines: a cabin bag in Economy Class class
• JetBlue: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Only Economy Class is available on flights from Cancún to St. Louis.

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $359 round-trip via Atlanta Hartsfield-Jackson (ATL), compared to $444 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Airbus A321-100/200 family is used most often on this route, operated mainly by Volaris and Frontier. Other aircraft seen on the route include Airbus A320-100/200 variants.

Most connecting flights from Cancún to St. Louis pass through Atlanta Hartsfield-Jackson (ATL), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

Yes. Being flexible with your travel dates can save you up to 33% on the Cancún to St. Louis route. Wednesday is the cheapest departure day at $373 round-trip on average, while Friday is the most expensive at $550, a difference of $177. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Afternoon is the busiest departure period on Cancún to St. Louis flights, with 100% of flights leaving in that window. Morning departures account for 0%, evening flights for 0%, and night flights for 0%.

Some of the most popular sights in St. Louis are Downtown St. Louis, Busch Stadium and Enterprise Center. These are among the most viewed places in St. Louis on KAYAK.

These are the earliest and latest flight times available from Cancún to St. Louis:

• Earliest: departs at 10:45 am and lands at 2:01 pm
• Latest: departs at 4:00 pm and lands at 7:16 pm.

The flight takes about 3h 16m.

A nonstop flight from Cancún to St. Louis takes 3h 16m, covering 1,241 miles.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $369 to $2,174. That means the highest observed fare was about 6x higher than the lowest one.

One-way fares from Cancún to St. Louis are currently lower than usual. Average one-way flight prices are about $202, which is 35% below the typical average for this route.

Lambert-St Louis Airport (STL) hosts 5 major car rental companies, with daily rates starting from around $31 for economy cars. Top options include:
• Hertz
• Budget
• Alamo
• Enterprise Rent-A-Car
• Payless

Round-trip flights from Cancún to St. Louis range from $383 to $514, with an average of $443 over the past 12 months. Anything below $383 counts as a good deal.