$118 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 5/18. 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$299
Mexico City
Mexico City1 stop$353
Guadalajara
Guadalajara1 stop$401
Puerto Vallarta
Puerto Vallarta2 stops$534
León
León2 stops$527
Morelia
Morelia1 stop$507
Mérida
Mérida1 stop$580
Mazatlán
Mazatlán1 stop$640
Veracruz
Veracruz1 stop$600
Cancún
Cancún2 stops$299
Mexico City
Mexico City1 stop$353
Guadalajara
Guadalajara1 stop$401
Puerto Vallarta
Puerto Vallarta2 stops$534
León
León2 stops$527
Morelia
Morelia1 stop$507
Mérida
Mérida1 stop$580
Mazatlán
Mazatlán1 stop$640
Veracruz
Veracruz1 stop$600

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

Wed, May 13 - Tue, May 19
Frontier Logo
5:27 pm - 9:09 am
STL
-
CUN
39h 42m
2 stops
Frontier Logo
11:13 am - 2:39 pm
CUN
-
STL
3h 26mnonstop
$299Frontier
Wed, Apr 29 - Mon, May 4
Frontier Logo
8:23 pm - 2:56 pm
STL
-
CUN
18h 33m
1 stop
Frontier Logo
4:07 pm - 5:36 pm
CUN
-
STL
25h 29m
1 stop
$302Frontier
Sat, Jun 6 - Thu, Jun 11
American Airlines Logo
7:20 pm - 8:02 am
STL
-
SJD
14h 42m
1 stop
American Airlines Logo
4:13 pm - 8:51 am
SJD
-
STL
14h 38m
1 stop
$428American Airlines
Sat, Jun 6 - Thu, Jun 11
American Airlines Logo
7:20 pm - 8:02 am
STL
-
SJD
14h 42m
1 stop
American Airlines Logo
10:55 am - 7:36 pm
SJD
-
STL
6h 41m
1 stop
$448American Airlines
Tue, May 5 - Tue, May 19
Delta Logo
6:00 am - 1:04 pm
STL
-
SJD
9h 04m
1 stop
Delta Logo
1:09 pm - 12:30 am
SJD
-
STL
9h 21m
1 stop
$470Delta
Tue, Jul 21 - Mon, Jul 27
Delta Logo
6:00 am - 11:11 am
STL
-
SJD
7h 11m
1 stop
Delta Logo
1:25 pm - 12:37 am
SJD
-
STL
9h 12m
1 stop
$473Delta
Wed, Sep 23 - Wed, Sep 30
Aeromexico Logo
9:00 am - 12:14 am
STL
-
QRO
16h 14m
2 stops
Aeromexico Logo
9:05 am - 6:02 pm
QRO
-
STL
7h 57m
1 stop
$515Aeromexico
Wed, May 27 - Wed, Jun 3
United Airlines Logo
5:10 am - 2:42 pm
STL
-
CZM
10h 32m
2 stops
United Airlines Logo
3:52 pm - 10:34 am
CZM
-
STL
17h 42m
2 stops
$532United Airlines
Tue, May 5 - Fri, May 8
Aeromexico Logo
7:25 am - 7:40 pm
STL
-
PVR
13h 15m
2 stops
Aeromexico Logo
1:41 pm - 11:59 pm
PVR
-
STL
9h 18m
1 stop
$534Aeromexico
Thu, May 28 - Thu, Jun 4
United Airlines Logo
6:14 am - 2:42 pm
STL
-
CZM
9h 28m
1 stop
United Airlines Logo
3:52 pm - 8:41 am
CZM
-
STL
15h 49m
2 stops
$577United 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 $337 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 $337.

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 $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.

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 $326 (return) on average. On the other hand, the most expensive months are June and March, when the average cost of round-trip tickets is $572 and $557 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 16% 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$118
Best time to beat the crowds with an average 13% 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.
8.0
SouthwestOverall score based on 4328 reviews
8.0Comfort
8.1Boarding
7.5Entertainment
7.0Food
8.6Crew
Airline reviews

The seat was not comfortable. 1D. My back was sore all night and the next day.

8.0 ExcellentJolene, Apr 2026
LAS - DAL
Read more Southwest reviews

The seat was not comfortable. 1D. My back was sore all night and the next day.

Great flight. I didn't get a drink because I was asleep whole on the flight.

Great flight from Seattle to Phoenix and to Chicago-Midway from Phoenix

The new boarding process was easy and straightforward. Very pleasant.

The flight was okay. The pilots did an amazing job and kept us updated on the flight. The flight attendants were okay. They found time to be chatty with each other rather than focus on the guests. One of the attendants was a little less warm when asking about my bag I had on my lap that I was using during latter part of the mid- flight. Mind you, it was not the departure descent. I’m respectful to each and every attendant, it was the tone in her voice reminding me to place my carryon bag on the floor. I hope to have a better experience next time.

The entire travel day was a disaster from beginning to end. Woke up at two in the morning to make it to San Juan airport in time for a 5:30 am flight to Milwaukee which connected in Baltimore. Massive delays lead to me missing original connection out of Baltimore. Sixteen hours of delays/rebooking/layover time later, arrived in Milwaukee to find that only one of two checked bags made it there (despite the fact that Southwest brought another 737 jet to San Juan to fly us out to our original Baltimore connection—-not squeezed into another booked flight). The flight from Baltimore to Milwaukee was barely half full, so there was no logical reason to ship my bags out of Baltimore on a different flight to Chicago to then ship to Milwaukee. Southwest decided that my bags should not have been on the same connecting flight I WAS ON to Milwaukee, and then proceeded to accidentally leave my larger bag with the important items in Chicago. Terrible logic and support all around. Extremely angered and disappointed with SW. What a clownish operation your company has become!

It was as expected and I was grateful for the wheel chair help and ease of use.

One of the best airlines for fast boarding, on time arrivals, and top notch service!

The new seat assignment thing is wierd. If you don’t pay for a seat they always assign you a middle seat regardless of how many people are on the flight. Idk… the new company that bought Southwest is trying to make it more profitable, but I’m just not seeing it. The flight attendants aren’t having as much fun anymore. It just feels like the airline is slowly dying. IMO. We shall see if Southwest is the next Toy’s R Us.

Terrible. Even though there’s assigned seating now, they are still the slowest boarding airline of anyone.

The entertainment options on the seat back video boards were nice.

The flight I was supposed to be on was supposed to take off at 1:50 from State College. It was delayed over and over and over again until somehow I had to rebook on a flight that was supposed to have left State College at 8 am that morning but didn't end up taking off until almost 6 pm. Not only was this completely unacceptable, the "token from United" was a 15 dollar meal voucher that has to be used by today. I would personally like some miles added to my account for this inconvenience. I was in transit for 8 hours from the time I arrive at State College Aiport to when I got home. I was supposed to be home at 3 pm and I returned at 8 pm. Unacceptable. I have not been on an on Time united flight in nearly 5 years.

Crew was friendly. Seats are too narrow, particularly when a big person is in the adjacent seat, but I understand this is due to smaller planes usually flight into Lincoln. I have experienced several flight delays going out and coming into Lincoln airport, I say maybe 50% or higher of the flights I've taken out of this airport have been delayed.

newer aircraft, ability to connect my headset via blue tooth for entertainment.

Great flight. Boarded efficiently. Arrived early at CLT. There was no in flight entertainment on this aircraft. Great crew.

Due to cancellation of connecting flight (Lufthansa) I didn’t fly with United

The seat was comfortable. There was a lot of turbulence. If it weren't for that,it would have been okay.

It was a red-eye, but the flight felt surprisingly quick. The seats were very comfortable, and that made resting much easier. I also want to thank the gentleman seated next to me, who graciously moved so my mom could sit beside me. We slept almost the entire way. The cabin crew was respectful in not disturbing us, while also being courteous and professional throughout. Thank you, United.

Packed in plane small uncomfortable seats elbow to elbow nobody wants to be in that situation for the money they paid

Vegetarian selection could be better. Bread was too hard to chew.

The seat was comfortable, the attendants were very nice and WiFi made my life so much easier with work. Kudos!

Flight was 3 hours delayed. They gave our plan to two other routes. Need to knock that off.

To have arrived on time and not 3 hours late after having already spent $100 to change to an earlier flight, only to arrive back home close to the original flight time.

No gate in Rome. Had stairs. Got separated from my wife in a wheel chair. Customs was a zoo. If AA doesnt have landing rights, it should be advertised.

I almost missed my flight and they helped me out enormously

Business class was very good, one of my best flights

The "on the ground" A/C was not working. It was so hot while waiting to get in the air, a passenger from the rear of the plan declared "I just can't!" and waited in the gangway until time to close the doors. It was miserable. But the crew were champs and had an amazing attitude. I know they were as miserable as we were but didn't let that affect their performance.

The captain announced to the cabin there would be a delay because they observed a "cut" on a tire during precheck that needed to be cleared by maintenance. We were delayed during this inspection and allowed to proceed after maintenance "measured the cut and decided it was acceptable". My complaint is not about the delay or due diligence. I wish the captain had been more generic when making his announcement. I was a nervous wreck all the way to Charlotte worried that we would have a blowout when landing!

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

The flight was on time and the landing was very smooth. The crew and flight attendants were all very friendly and professional.

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.

The money you save flying volaris is not worth it

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.

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!!!

My flight was originally from SAT to MCO connecting from MCO to ORD. We got diverted to ATL and than Frontier staff there was sooo un helpful first they said they couldn’t give us any accommodation since our flight first got delayed that cancelled and now it’s 221am and I am still in ATL since they said they need to create a new flight my final destination is ORD and I have been delayed twice and cancelled. With no real help the frontier app didn’t work no email updates over all such a horrible experience

There's no seats that lean back with little leg space i wad uncomfortable the entire flight. Your charges for extra baggage is despicable and costly!!

Remind customers of the need to have passport or new ID for boarding.

Flight was canceled. Most upsetting was message from Kayak, stating that the flight was canceled and click with Kayak for details regarding rebook, refund details. THERE'S NO INFORMATION PROVIDED BY KAYAK EXCEPT THAT FLIGHT IS CANCELED. AND NOW THIS SURVEY TO FIND OUT HOW WAS THE FLIGHT !!!!!!!

The flight never took off and we spent 7 hours at the airport

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

Information on your arrival and departure airports