$93 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 3/8. 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
Cancún1 stop$322
Mexico City
Mexico City1 stop$329
Guadalajara
Guadalajara1 stop$437
Puerto Vallarta
Puerto Vallarta2 stops$409
León
León2 stops$391
Morelia
Morelia2 stops$648
Mérida
Mérida1 stop$526
Mazatlán
Mazatlán1 stop$483
Veracruz
Veracruz2 stops$391
Cancún
Cancún1 stop$322
Mexico City
Mexico City1 stop$329
Guadalajara
Guadalajara1 stop$437
Puerto Vallarta
Puerto Vallarta2 stops$409
León
León2 stops$391
Morelia
Morelia2 stops$648
Mérida
Mérida1 stop$526
Mazatlán
Mazatlán1 stop$483
Veracruz
Veracruz2 stops$391

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

Fri, Feb 20 - Wed, Feb 25
Multiple Airlines Logo
3:49 pm - 7:50 am
STL
-
CUN
15h 01m
1 stop
Multiple Airlines Logo
10:13 am - 10:27 pm
CUN
-
STL
13h 14m
1 stop
$322Multiple Airlines
Sun, Feb 15 - Thu, Feb 19
Multiple Airlines Logo
3:49 pm - 9:18 am
STL
-
CUN
16h 29m
1 stop
Multiple Airlines Logo
12:24 pm - 1:09 pm
CUN
-
STL
25h 45m
1 stop
$323Multiple Airlines
Wed, Mar 4 - Mon, Mar 9
Frontier Logo
8:17 pm - 8:51 am
STL
-
CUN
11h 34m
1 stop
Frontier Logo
12:15 pm - 11:19 pm
CUN
-
STL
11h 04m
1 stop
$328Frontier
Fri, Feb 20 - Wed, Feb 25
Frontier Logo
3:49 pm - 7:50 am
STL
-
CUN
15h 01m
1 stop
Frontier Logo
11:42 am - 2:09 pm
CUN
-
STL
3h 27mnonstop
$332Frontier
Tue, Feb 24 - Tue, Mar 3
Delta Logo
6:10 am - 5:37 pm
STL
-
SJD
12h 27m
2 stops
Delta Logo
10:27 am - 11:23 pm
SJD
-
STL
11h 56m
2 stops
$409Delta
Wed, Feb 25 - Tue, Mar 3
Delta Logo
6:10 am - 5:37 pm
STL
-
SJD
12h 27m
2 stops
Delta Logo
1:05 pm - 11:23 pm
SJD
-
STL
9h 18m
2 stops
$413Delta
Wed, Feb 25 - Tue, Mar 3
American Airlines Logo
7:58 am - 3:28 pm
STL
-
SJD
8h 30m
1 stop
American Airlines Logo
4:28 pm - 11:59 pm
SJD
-
STL
6h 31m
1 stop
$415American Airlines
Mon, Feb 9 - Thu, Feb 12
United Airlines Logo
6:40 pm - 11:43 am
STL
-
SJD
18h 03m
2 stops
United Airlines Logo
12:50 pm - 9:05 pm
SJD
-
STL
7h 15m
1 stop
$421United Airlines
Mon, Mar 9 - Fri, Mar 13
American Airlines Logo
5:12 am - 9:36 am
STL
-
SJD
6h 24m
1 stop
American Airlines Logo
4:34 pm - 10:59 am
SJD
-
STL
16h 25m
1 stop
$427American Airlines
Tue, Feb 24 - Tue, Mar 3
United Airlines Logo
6:00 am - 11:43 am
STL
-
SJD
6h 43m
1 stop
United Airlines Logo
2:11 pm - 10:14 pm
SJD
-
STL
7h 03m
1 stop
$433United Airlines
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 $327 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 $327.

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 $594, 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 $333 (return) on average. On the other hand, the most expensive months are March and June, when the average cost of round-trip tickets is $605 and $567 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, Thursday 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 15% 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$93
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 2% increase in price.
Flight from St. Louis to Cancun

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 $427 on average. Morning departures are around 22% 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 $627.

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 $282 one-way - $413 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 4267 reviews
8.1Boarding
7.0Food
8.6Crew
8.0Comfort
7.5Entertainment
Airline reviews

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

10.0 ExcellentAnonymous, Jan 2026
PHX - MDW
Read more Southwest reviews

All good except once again bags took an hour at Midway Airport Happens all the time. Ridiculous

Everything went smoothly and we even arrived a little bit early.

Great vacation. Can't wait till next year for another one.

Great flight but super high price. Glad it was a business trip and not personal

On time. Friendly staff. Took to long to pre bord all the specialty groups. Cramped small plane

The seats were comfortable, and the boarding process was pretty smooth.

3 hour delay. Had to change plans and was still delayed.

The staff was very friendly, professional, and courteous. The overall flight was a great experience.

The crew canceled the complementary snack and drink in anticipation of turbulence that never materialized. I was counting on the drink (water) to take the the doses of medication - prescribed for my heart condition - that were due during the flight. Since no snack or meal was served on this flight, I cannot rate the food quality. Otherwise, this flight was excellent.

Departure was delayed more than 1/2 hour while we waited for luggage (only) transfer from another flight/plane. Once approved for takeoff, the flight was excellent.

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

The food was terrible this time. Otherwise pleasant, quiet, on-time.

It was a pretty standard flight... until the almost hour and a half spent on the taxi way. I get that the weather has been poor but the delay had nothing to do with the weather and more to do with a plane with several issues tying up the gate. I get that that happens from time to time but this has been EVERY flight I've been on for the past 5 years and I fly 3 to 5 times a year. This isn't just United... it's American, it's Delta. It's an issue with the entire industry. I work for UPS and packages on a cargo plane get better service than people do these days. Anymore I HATE flying.

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Unfortunately weather delayed our flight waiting for our plane to arrive and due to a little snow time was needed to deice the plane so departure was very delayed and I missed the connecting flight

Very good. Because of the delays with my previous flight, I missed my connection, but I was able to book another flight through the United app easily.

I wish there were outlets to charge my iPhone. The crew was great; we had a female pilot who was great with explaining what was happening and delays,

Crew was helpful and cheerful especially when they had no refreshments to work with. The plane was never serviced and had nothing but limited water and coffee onboard. For the price point, a concern of services.

Flight was smooth, quick and felt safe. The 2 delays not happening would have been better but I guess that happens in the airline industry

Flight was canceled. I asked to be rerouted to OKC and then took an Uber.

AA did not allow to board a flight because my connecting flight from DFW had been canceled. I got on another flight to another city. No service on the plane and I did not use their entertainment system.

On time on a day with lots of weather cancellations on other flights. Thank you for getting me home during a winter storm!

Don't change gate multiple times make people run across the airport. Announce delays in a timely manner. Have maintenance crew ready. Don't delay and keep passengers on the plane for 3 hrs. on tarmac.

The plane was experiencing problems with the HVAC system, it was very cold in the front of the plane and very hot in the back.

My flight to London from Philadelphia was cancelled due to weather.

The attendants were kind and helpful. A sugar-free drink would have been very welcome.

Pilot navigated severe weather/snow storm with skill. Described his intentions clearly

Overall a good red eye. Crew chatted very loudly the whole time making it difficult to sleep.

It’s a 2 1/2 hour flight so good and comfort was not my real concern. Safety, easy, fast was what I was looking for. The crews were great, plane was clean, boarding from CBX was fantastic! Definitely traveling this way again.

Is was a good short flight with some turbulence! I would fly Volaris again.

We had boarding passes for the next flight but we could not catch the flight in the small airport just because volaris closed the boarding at the counters an hour before for which we had to sepnd almost 3+ hours to catch next flight. There are hardly anyone who can speak english, but thank God, we have found an young man who could not only speak English but helped us book for the next flight. The air crafts are noisy and scary sometimes to hear that squeeking noises during the take off and during the flight. They do not even offer a cup of coffee for free in flight. The prices are super high and the services are zero. That’s pretty much for this airlines in summary.

The boarding , and it would be nice if they would let us know head of time about flight changes

The fly was 2 hours delayed and the plane was old and dirty. A very umcorfotable flight, which I won't recomend to anyone

The flight was delayed by two hours. I had paid for extended leg room. Due to the delay, the plane was different and I didn't end up having extended leg room. I finally was able to reach Volaris on Whats App and they gave me an airline credit. I wanted a refund to the credit card since I hardly ever fly Volaris. Other than that, it was a very comfortable flight.

Confusion over extra fees. Held up on ramp during boarding. Thin seat cushion. Minimal leg room.

The check-in is either at a kiosk that didn’t allow me to check-in because my middle name was not on the reservation or at an agent that cost $15.

Better communication about delayed flight. I am thankful for a small credit for late 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.

It was ok. It was expensive to check 2 bags ($75.00 per bag), and then it took a long time to wait for shuttle to take us from one terminal to the terminal where the plane was taking off at LAX. And all of this for a flight where we had to pay for any food or drink that was not water.

It didn’t happen. I booked it and then was told it wasn’t available and then forced to pay far higher prices for a worse option

A 630departure flight Delayed 6hours! They changed my gate, I moved to the new gate. Had our flight on the screen for 12noon departure. I go get above to eat, check screen again and the flight was gone, no notice no announcement, nothing!! They sent my bag on the flight I wasn’t on, got it back to me 3days later. Thank goodness they did refund my money but I will NEVER fly them again.

Due to weather, my flight was delayed, further delayed, then canceled. I eventually got through to a support person who helped me find a different route out of MSP, but to get to DIA, they didn't want to, but eventually did help with the connection ticket purchase. But even this replacement flight was delayed time and time again, and I would have missed my connecting flights and I didn't want to get stuck in a layover city, so after 12 hours at the airport with two young boys who were very tired, we just cancelled our plans and spent the week at home, instead of Nana's.

Plane and crew on board were fine. Everything else was terrible.

The third party booking with cheapflightsfares was awful. Kayak should NOT partner with them. They sold me a bundle including seat selection and carry-on, but did not book the carry-ons with Frontier, so I’m out of pocket for $414 more while I await resolution.

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

Information on your arrival and departure airports