$162 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 8/15. 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
Cancún2 stops$339
Mexico City
Mexico City1 stop$366
Guadalajara
Guadalajara2 stops$464
Puerto Vallarta
Puerto Vallarta1 stop$513
León
León2 stops$416
Morelia
Morelia1 stop$620
Mérida
Mérida1 stop$598
Mazatlán
Mazatlán2 stops$1,295
Veracruz
Veracruz1 stop$652
Cancún
Cancún2 stops$339
Mexico City
Mexico City1 stop$366
Guadalajara
Guadalajara2 stops$464
Puerto Vallarta
Puerto Vallarta1 stop$513
León
León2 stops$416
Morelia
Morelia1 stop$620
Mérida
Mérida1 stop$598
Mazatlán
Mazatlán2 stops$1,295
Veracruz
Veracruz1 stop$652

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

Mon, May 25 - Tue, Jun 2
Frontier Logo
5:27 pm - 9:09 am
STL
-
CUN
39h 42m
2 stops
Frontier Logo
3:39 pm - 7:23 pm
CUN
-
STL
27h 44m
1 stop
$339Frontier
Sat, May 23 - Tue, Jun 2
Frontier Logo
5:27 pm - 9:09 am
STL
-
CUN
39h 42m
2 stops
Frontier Logo
3:39 pm - 7:23 pm
CUN
-
STL
27h 44m
1 stop
$350Frontier
Sat, Aug 15 - Tue, Aug 25
Frontier Logo
3:34 pm - 9:52 am
STL
-
CUN
18h 18m
1 stop
Frontier Logo
3:35 pm - 7:23 pm
CUN
-
STL
27h 48m
1 stop
$354Frontier
Sat, Sep 5 - Thu, Sep 10
American Airlines Logo
5:11 pm - 11:27 am
STL
-
SJD
20h 16m
1 stop
American Airlines Logo
10:48 am - 11:41 pm
SJD
-
STL
10h 53m
1 stop
$490American Airlines
Sat, Sep 5 - Thu, Sep 10
American Airlines Logo
5:11 pm - 9:47 am
STL
-
SJD
18h 36m
1 stop
American Airlines Logo
12:05 pm - 11:41 pm
SJD
-
STL
9h 36m
2 stops
$494American Airlines
Tue, Jun 2 - Tue, Jun 9
Delta Logo
6:00 am - 11:30 am
STL
-
SJD
7h 30m
1 stop
Delta Logo
6:07 am - 10:18 pm
SJD
-
STL
14h 11m
2 stops
$499Delta
Sat, Jun 6 - Thu, Jun 11
Delta Logo
6:00 am - 12:50 pm
STL
-
SJD
8h 50m
1 stop
Delta Logo
10:23 am - 12:43 am
SJD
-
STL
12h 20m
2 stops
$544Delta
Mon, Aug 3 - Sat, Aug 8
United Airlines Logo
5:10 am - 12:53 pm
STL
-
PVR
8h 43m
1 stop
United Airlines Logo
1:18 pm - 8:42 pm
PVR
-
STL
6h 24m
1 stop
$558United Airlines
Mon, Aug 3 - Sat, Aug 8
United Airlines Logo
5:10 am - 12:53 pm
STL
-
PVR
8h 43m
1 stop
United Airlines Logo
2:52 pm - 8:34 am
PVR
-
STL
16h 42m
2 stops
$563United Airlines
Mon, Jul 27 - Fri, Jul 31
Southwest Logo
5:35 am - 1:40 pm
STL
-
SJD
10h 05m
2 stops
Southwest Logo
2:35 pm - 1:50 am
SJD
-
STL
9h 15m
1 stop
$575Southwest
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 Cancun, at $273 round-trip. The most popular route is from St. Louis (STL) to Cancun (CUN), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $273.

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

The average price for all round-trip flights from St. Louis to Mexico depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to Mexico is generally in the morning, when round-trip flights cost $433 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.

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 $636, 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 July, when tickets cost $104 (return) on average. On the other hand, the most expensive months are January and February, when the average cost of round-trip tickets is $1,432 and $984 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, Friday 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 17% 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$162
Best time to beat the crowds with an average 14% drop in price.
Most popular time to fly with an average 9% 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.

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.
7.9
SouthwestOverall score based on 4305 reviews
8.0Comfort
7.5Entertainment
8.6Crew
7.0Food
8.1Boarding
Airline reviews

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

2.0 MediocreJoshua, May 2026
TPA - LAS
Read more Southwest reviews

Truly terrible. Will never willingly fly southwest again. Seats are worse than before they switched to assigned seating. One flight attendant was the opposite of helpful (rude, unhelpful, dismissive, and as my stranger seatmate said unprompted: a total prick). This caused me, 15 minutes into the flight, to book an alternate return flight home on a competing airline (first class 1.2k purchase instead of my existing planned flight) just so I would not have to ever be on that aircraft, with that terrible service person, with those horrific seats ever again.

Not having a five hour delay with little notice! The crew was very kind, though, and just as tired as we passengers were. The flight didn't depart until nearly 1 am...and no reason was ever given.

The entire experience from boarding to landing was amazing! The crew were very friendly. Will definitely be back.

no service at all due to turbulence. they should've at least given us snacks, there were only 10 people on the entire flight.

First time I've had to use the disabled accommodations. And I could not have had a better experience with Southwest, i was having trouble getting from one terminal to another due to my heart failure. And the next thing I know a Southwest agent had made sure. I had a wheelchair at all my flights. Can't thank them enough.

Delayed flight, lack of information, boarding process is a mess as is the carryon luggage causing issues when leaving the plane….just a poor experience.

Comfortable. Easy. No problems. Just wish they had gf options for snacks.

The crew was very kind and made going to Hawaii relaxing and fun to look forward to! Thank you Southwest for a pleasant flight!

This leg was much better, but we did have to have a 3 hour lay o er after coming from a very exhausting hiccup with our flight from BNA to Den

We waited in the airplane for over 45 min for a southwest employee to make the flight. This cause over half the plane to miss their connecting flight in Denver. When we confronted the desk upon arrival, they told us the only flight they had was the next day leaving at 8:50 pm!!! Or they offered to get us to Burbank or LA, but after that we were on our own to get back to Santa Barbara. I paid for a flight from sba to bna bna to sba. My re entry into mom mode has been 💯 rough because of southwest mistake with my flight. And now I’m leaving to Reno tomorrow for a vballl tournament and just discovered that my leg in Vegas has me and my 3 kids on a stand by flight even though I had booked these ticket last year November!! Do better southwest!

O’hsre taxi and deboarding took 40 minutes. Needed 20 minutes extra time between connecting flights to avoid running through terminal.

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

I liked that my son and I were reseated next to each other (we had different bookings). I liked that it was a directg flight and mostly on time. I liked that you provided pillows and blankets. Flight attendants were generally courteous. The messaging through wifi did not work well. The food was not good. Seats are very narrow and I felt slightly claustraphobic in the window seat.

Overall a good experience, but no wifi available for free or for purchase and we got wet from condensation or other water source during descent.

Some crew were unfriendly or in some cases just straight up rude.

Booked through Kayak Business, had a seat in middle and towards back due to booking rate, not comfortable.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

A long delay. Don't travel late in the day.

Super friendly with lots of drink options an entertainment. Friendly crew.

Standard flight with a drinks and a snack- overall very quick flight. The flight attendants were very strict, bordered on rude.

Terrible, horrible, disappointing- without telling us they changed planes and moved and separated our seats to opposite sides - said they changed seats putting us together - got to airport to find no, they did not - we sat opposing sides of plane - food overly salty to inedible, never saw stewardess but once - it was terrible

not sure why you ask about food, I n3ver get food on flights except maybe cookies or pretzels. wifi was slow and in and out most of the flight not good.

The crew was very attentive through out the flight. Seats were comfortable, nice flight bag with pillow and blanket. Food was okay, since it was a overnight flight seemed to go by fast.

The flight attendant on my side of business class seemed like a novice and did not provide good service. Otherwise the flight was good and the entertainment system was very good. No free WiFi.

Cancelled BOYH legs of our flight home 30 min before initial boarding

Cancelled the flight half hour before boarding. Then cancelled the connecting flight too.

Left early arrived early..right amount of talking from pilots..of course had to love the biscuit and water!

I would like a refund for the extra cost the seat I paid for. An oversized person sat next to me and I couldn’t fit on my seat and had to move to another seat.

Boarding gate at LAX was too crowded—two gates next to one another

The flight was delayed about an hour for a maintenance specialist to approve the maintenance repair

The flights were on time, the ground crew and on board crews were kind and efficient. The free snacks for Premium+ were good, similar to US First Class snacks. The plane were clean and bright! Complaints? The seats were worn and the seat-back pockets were missing. Overall, I'll book again with Volaris. Ignore the negative social media posts, understand what your fare includes, buy the add ons you need. We had no problems with our personal items and carryons.

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.

Unfortunately it was not a good flight got canceled had to be at the airport all night long to get a different flight to another airport my first flight with Volaris was very bad. Poor services

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.

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

The crew acted like they had never done this and kept barking passive aggressive orders at people. + the security line + the delay + sitting on the tarmac for 2 hours + none of the apps or signage updating with correct times

More inflight connection. And leg space is horrible. And the paying for baggage I'd ridiculous!!!

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

Information on your arrival and departure airports