$134 Find Cheap Flights from St. Louis to Mexico

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Mexico departing on 4/21. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Flight Deals

Cheap Flights from St. Louis to Mexico

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Cancún
Cancúnnonstop$332
Mexico City
Mexico City1 stop$390
Guadalajara
Guadalajara1 stop$371
Puerto Vallarta
Puerto Vallarta1 stop$384
León
León1 stop$489
Morelia
Morelia1 stop$606
Mérida
Mérida1 stop$544
Mazatlán
Mazatlán1 stop$634
Veracruz
Veracruz2 stops$667
Cancún
Cancúnnonstop$332
Mexico City
Mexico City1 stop$390
Guadalajara
Guadalajara1 stop$371
Puerto Vallarta
Puerto Vallarta1 stop$384
León
León1 stop$489
Morelia
Morelia1 stop$606
Mérida
Mérida1 stop$544
Mazatlán
Mazatlán1 stop$634
Veracruz
Veracruz2 stops$667

Book Cheap St. Louis to Mexico Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Mexico that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Mexico

Sun, Apr 26 - Fri, May 1
Frontier Logo
6:00 am - 9:17 am
STL
-
CUN
3h 17mnonstop
Frontier Logo
11:48 am - 3:19 pm
CUN
-
STL
3h 31mnonstop
$332Frontier
Wed, May 6 - Sun, May 10
Frontier Logo
6:00 am - 9:17 am
STL
-
CUN
3h 17mnonstop
Frontier Logo
4:09 pm - 6:50 am
CUN
-
STL
14h 41m
1 stop
$333Frontier
Wed, Apr 1 - Wed, Apr 8
American Airlines Logo
8:00 am - 2:51 pm
STL
-
PVR
7h 51m
1 stop
American Airlines Logo
12:19 pm - 7:30 pm
PVR
-
STL
6h 11m
1 stop
$384American Airlines
Tue, May 12 - Tue, May 19
American Airlines Logo
5:20 am - 12:29 pm
STL
-
PVR
8h 09m
1 stop
American Airlines Logo
3:10 pm - 8:54 am
PVR
-
STL
16h 44m
2 stops
$389American Airlines
Sat, May 2 - Tue, May 5
Delta Logo
7:00 am - 1:45 pm
STL
-
SJD
8h 45m
1 stop
Delta Logo
2:19 pm - 11:36 pm
SJD
-
STL
7h 17m
1 stop
$423Delta
Tue, May 12 - Tue, May 19
Delta Logo
6:00 am - 3:15 pm
STL
-
PVR
10h 15m
2 stops
Delta Logo
6:00 am - 4:10 pm
PVR
-
STL
9h 10m
2 stops
$450Delta
Mon, Mar 23 - Wed, Mar 25
Aeromexico Logo
6:00 am - 12:45 pm
STL
-
CZM
7h 45m
1 stop
Aeromexico Logo
2:00 pm - 11:58 pm
CZM
-
STL
8h 58m
1 stop
$502Aeromexico
Mon, May 4 - Mon, May 11
United Airlines Logo
8:15 pm - 2:42 pm
STL
-
CZM
19h 27m
2 stops
United Airlines Logo
3:52 pm - 10:30 pm
CZM
-
STL
5h 38m
1 stop
$519United Airlines
Mon, May 4 - Mon, May 11
United Airlines Logo
8:15 pm - 2:42 pm
STL
-
CZM
19h 27m
2 stops
United Airlines Logo
3:52 pm - 8:39 am
CZM
-
STL
15h 47m
2 stops
$523United Airlines
Tue, Mar 17 - Wed, Mar 25
Aeromexico Logo
6:00 am - 12:45 pm
STL
-
CZM
7h 45m
1 stop
Aeromexico Logo
2:00 pm - 11:58 pm
CZM
-
STL
8h 58m
1 stop
$530Aeromexico
Booking Insights

KAYAK's insights & trends for St. Louis to Mexico flights

Get data-powered insights and trends into flights from St. Louis to Mexico to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest St. Louis to Mexico flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Mexico from St. Louis found in the last 72 hours was to Cancún, at $308 round-trip. The most popular route is from St. Louis (STL) to Cancún (CUN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $308.

Can I save money by flying with a layover from St. Louis to Mexico?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $597, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from St. Louis to Mexico?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Mexico, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Mexico is September, when tickets cost $331 (return) on average. On the other hand, the most expensive months are March and June, when the average cost of round-trip tickets is $577 and $568 respectively.

What’s the cheapest day of the week to fly from St. Louis to Mexico?

The average price of all round-trip flights from St. Louis to Mexico clicked on KAYAK for each day over the last 12 months.

If you are looking for a flight deal from St. Louis to Mexico, look for departures on Mondays and avoid leaving on a Saturday, as it's usually the priciest day. When flying back from Mexico, Sunday is the cheapest day to fly and Monday is the most expensive.

How far in advance should I book a flight from St. Louis to Mexico?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Mexico, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Mexico, you should book around 2 weeks before departure, which saves you about 19% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 8 weeks before departure.

Good to know

Low seasonAugust
Cheapest flight$134
Best time to beat the crowds with an average 13% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from St. Louis to San José del Cabo

FAQs - booking Mexico flights

  • How does KAYAK find such low prices on flights from St. Louis to Mexico?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Mexico.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Mexico?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Mexico is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Mexico?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from St. Louis to Mexico with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Mexico?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from St. Louis to Mexico up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Mexico?

    The cheapest time of day to fly to Mexico is generally in the morning, when round-trip flights cost $432 on average. Morning departures are around 21% cheaper than evening flights, on average. The most expensive time of day to fly to Mexico is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $590.

Top tips for finding cheap flights to Mexico

  • Looking for a cheap flight? 25% of our users found tickets from St. Louis to the following destinations at these prices or less: Cancun $216 one-way - $412 round-trip

Reviews of the top 5 airlines serving from St. Louis to Mexico

 
Need help choosing which airline to fly with from St. Louis to Mexico? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4299 reviews
8.1Boarding
7.5Entertainment
8.6Crew
7.0Food
8.0Comfort
Airline reviews

It was canceled. Supposedly weather. But there was no snow in Baltimore. At least we found out before driving to airport

2.0 MediocreAnonymous, Feb 2026
BWI - PBI
Read more Southwest reviews

It was canceled. Supposedly weather. But there was no snow in Baltimore. At least we found out before driving to airport

I have not flown Southwest in awhile and had a very pleasant experience. From ticketing to boarding to the flight. The flight left on time and landed ahead of schedule. It won't be so long next time!!

The Southwest experience has definitely taken a dive from its early days. You can no longer deferentiate from other airlines. Air travel is too expensive. Southwest is no longer budget friendly. They have lost me as a loyal customer.

Flight was hours late, unable to sit next to spouse, I have had so much better experiences. Substantially better, only saving grace was that it was a short flight.

An entire day of delays. Cost lots of money. Meals and a hotel.

The WiFi and crew on the plane were good, however, the boarding experience was awful. I paid for the Choice Preferred and was boarded in group 5 so all overhead storage was full. They found room for our luggage, but further back making getting off the plane a nightmare. Also, we were in row 6 and the seats were extremely uncomfortable. Both my daughter and I had no leg room and couldn’t wait to get off the plane.

The charges were ridiculous for an hour flight and the turbulence was very scary.

Still need to work out the kinks on the new assigned seating boarding process. Otherwise, a very good flight.

WiFi did not work. Boarding with the new seating assignments took too long. The temperature in the terminal was obnoxious. +/- 80°

The seats are now more narrow. I paid for front row the seats in the front are even more narrow than before.

Everything was good except wifi and a leaking drink chiller. The floor was all wet and my bag was soaked. Did not notice until debarking. Have not heard back from Delta. Even though this was leg one of an international flight in first class, they denied access to their Sky Club - very disappointing!

The staff was fine. The plane was extremely tight, and I paid for the wifi and it did not work at all. I was actually going to ask for a refund.

two hour delay and the Delta representative on the PA system was unable to understand

An awesome flight crew. FC seat cushion just doesn’t cut it for a 3+ hour flight.

2+hrs delay without any reason provided and a cramped flight

We waited an hour on the runway to get a gate in Orlando

Flight was delayed by 3-hours and their fix was… complimentary pretzels.

Flight was delayed due to crew being not on time

Flight crew issues delayed my flight by 2 1/2 hours. Causing me to miss my connection.

The staff on board and gate was nice - a welcome change from the usual. We also arrived early, which was a great benefit, given that it takes 30 minutes plus to get bags at SRQ.

We got delayed three hours and nobody thought to have the bathroom fixed while we were sitting waiting to board? took a full hour to have maintenance come and check it off. Had to shut the bathroom down twice so that the pilots could go to the bathroom. Everyone missed their connections.

Flight left on time and we arrived 25 minutes early! There was a gate available when we arrived so early on a busy Sunday afternoon! Flight attendants came around twice with the drinks cart.

Wonderful. Quick boarding. Early departure and we arrived 30 minutes early at our destination. Unfortunately, when you arrive early, there is still a departing aircraft at our gate. We had to park for 30 minutes until the gate was clear. So our early arrival was not really early at the gate. Otherwise it was a quick and smooth flight. Appreciated the efficiency.

Flight on time. Excellent service in Premium Economy. Great food served and cleaned up promptly. Unfortunately the climate control was malfunctioning and it was very cold and felt a bit like camping. Cold helps with sleep though so not complaining too much. Slept well. It asks to rate "entertainment". I do not like any IFE, don't shove a big screen in my face—I have my own phone if I want it. So this will always get low ratings.

We had turbulence ever 1/2 hr or so and the captains announcements were SOOOO LOUD

Everything was great except for the boarding process. Everyone is lining up all at the same time and it’s hard to tell between the groups as they are way too large.

Women boarding passengers at the gate was absolutely rude and disrespectful of passengers. The flight attendant was absolutely delightful! Smiling and connected with the passengers. So happy. The seats are cramped and uncomfortable but I guess that’s just the way it is Communication regarding flight was excellent

Overall we had a good experience during our flight from San Francisco to Houston.

Airport terminal was outdated, flight was on a small jet with no wifi

We were delayed for about an hour from taking off due to traffic control procedures at the destination airport. But once in the air, the flight went well. The crew members were great and provided cabin service despite moderate turbulence during much of the flight.

Lack of gluten free options in food service. I have Celiac disease and it appears you no longer offer special meals for people with dietary restrictions. I am a frequent flyer traveling into and out of Omaha airport. I have noticed over the course of several months that although our flight typically arrives ahead of schedule (awesome job AA!) - we typically sit on the runway for several minutes waiting for the ground crew to get in place. Not sure if it is a ground crew issue or a gate availability issue (due to construction at this airport). Seems to be more of a ground crew being on time issue.

Arrived early picked up my bag in a few minutes- great trip - thank you

Flight boarded, departed and landed on time. Excellent service from flight attendant in FIRST

Boarding is always an ordeal. Less dogs on flights. I am highly allergic to dogs and cats. Why are there so many animals these days?

Flight to Tampa was delayed taking off due to plane arriving late but no other issues

There was a delay with the plan which cause the flight to leave later and once arrived in Chicago there was another delay and some passengers missed their connecting flights

Massimo, flight attendant was very authentic, attentive - wonderful. Food/wrap was just okay.

Worst experience ever. Flight could not land in Charlotte for what we were told was a ground stop. Had to be diverted to Raleigh to refuel. Strangely during ground stop, our connecting flight had no issue taking off on time causing us to miss our flight. We were told there were no other flights that day to our final destination and that two days out was the next one. The only flights to get us there were from Chicago the next morning. Completely opposite direction but it was a direct flight. So we get flown to Chicago and have to find a hotel in our own dime. The flight in the morning was also delayed. Thankfully only a short time. The non too of all this, our luggage did not arrive by the time we were there. Communication was terrible, through the entire trip. Complete incompetence. Will never fly American again.

Horrible. Got delayed many hours because their pilot wasn't trained for night landing at the airport and a rain delay made it a night landing. We have to wait hours for a qualified crew. They give us 12 dollar meal vouchers but most everything in the airport was closed and definitely more expensive than the vouchers.

I am an AA flyer for a very long time... AA has yet to disappoint.

Gate not determined until I got to the airport - hard to plan the trip to the airport.

Our flight was canceled. I will never use Kayak nor Frontier for travel again. The entire experience was a headache.

Frontier.. nickel and dime add-ons. Flight late, on time, late again, last minute gate change, arrival gate required a shuttle to the terminal. They sure keep you guessing.. if you like a little chaos and airport anxiety, this is the airline for you!

This is my second time flying with Frontier. My current experience was very favorable. The staff from the gate to the plane was friendly, warm and professional. The food options lacked in my opinion. This area needs some attention in my opinion.

First of all we hade waited 3 hours in the airplane waiting to leave. Second the return schedule was changed and it messed up my entire vaction. I won't buy never again another flight and recommend to nobody traveling with them.

There was no food and no entertainment, so I'm not sure why these are even in the survey, as my understanding is frontier does not ever offer food without a few, not even a snack, and there are no screens so unless the flight safety talk is our entertainment why ask how we liked it?. One of the flight attendants say in the back of the plane as people filed in to their seats, yelling orders about where to put baggage and telling people to hurry up. It was the least professional experience I've ever had on a flight.

Very well recently! Frontier is improving and less harrassing customer on luggages! Positive!

Good for a budget airline! It was easy to get on, staff was really nice. Can’t say anything about the food or entertainment because it wasn’t available, which is fine.

I am writing to express my disappointment with my recent Frontier Airlines flight. I was charged $99 at the gate because my bag was said to be too large, yet once onboard there was no available overhead bin space, and I was required to place the bag under the seat in front of me anyway. This made the charge feel unnecessary and unfair. Additionally, before the flight even took off, I was asked to move from the seat I paid for into a middle seat so another passenger and her cat could have my seat to themselves. I was not offered compensation or an explanation for being moved from a paid seat. Between the unexpected bag fee and being forced to give up my seat, this experience fell well below acceptable customer service standards. I would appreciate a review of this situation and appropriate compensation.

It was costly and difficult to check in. $85 to take a small suitcase with me, carry on or checked and $75 on the return trip, Plus $25 if I didn't check my self in check in $25, because I couldn't do it on the kiosk. Small very uncomfortable seats, waited on the runway for near an hour each way. It was my worst flight to date.

Everything you need to know for your flight from St. Louis to Mexico

Information on your arrival and departure airports