$102 Find Cheap Flights from St. Louis to Mexico - Compare and Save

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Cheap Flights from St. Louis to Mexico

Cheapest round-trip prices found by our users on KAYAK in the last 5 days
Cancún
Cancúnnonstop$355
Guadalajara
Guadalajara2 stops$290
Puerto Vallarta
Puerto Vallarta1 stop$445
León
León2 stops$581
Morelia
Morelia1 stop$679
Mérida
Mérida1 stop$579
Mazatlán
Mazatlán2 stops$1,454
Veracruz
Veracruz1 stop$760
Cancún
Cancúnnonstop$355
Guadalajara
Guadalajara2 stops$290
Puerto Vallarta
Puerto Vallarta1 stop$445
León
León2 stops$581
Morelia
Morelia1 stop$679
Mérida
Mérida1 stop$579
Mazatlán
Mazatlán2 stops$1,454
Veracruz
Veracruz1 stop$760
Booking Insights

Price, demand and travel trends for St. Louis to Mexico flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

Are flights from St. Louis to Mexico cheaper or more expensive than last year?

Fares from St. Louis to Mexico are running about 5% higher than they were around this time last year, averaging $604 round-trip.

What are the cheapest fares from St. Louis to Mexico right now?

Here are the cheapest round-trip fares from St. Louis to Mexico on KAYAK in the last week:

• Guadalajara Miguel Hidal (GDL) from $290
• Cancun (CUN) from $355
• Mexico City Benito Juarez (MEX) from $374
• San José del Cabo Los Cabos (SJD) from $375
• Puerto Vallarta Ordaz (PVR) from $445

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

January is the cheapest time of year to fly, with average fares of $559. Prices are highest in December, when average flight costs increase to around $681.

When is the best time to book flights from St. Louis to Mexico?

Book your flights 4 weeks before your trip. KAYAK data collected over the past 12 months shows that booking in this window can save you around 15% compared to booking last-minute (within 2 weeks of departure).

Which airport in Mexico is the cheapest to fly to from St. Louis?

Based on KAYAK data from the past 12 months, the cheapest airports to fly into Mexico are:

• Cancun (CUN) from $548
• San José del Cabo Los Cabos (SJD) from $590
• Tulum Intl (TQO) from $600

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

Tuesday tends to be the cheapest day to fly from St. Louis to Mexico, while Saturday is the most expensive. Fares run about 13% higher that day, based on the past 12 months of KAYAK data.

What's the cheapest time of day to fly from St. Louis to Mexico?

Data from the past 12 months shows it's cheapest to fly to Mexico during the evening with average prices of $597. The afternoon is the most expensive time to fly, with average prices of $670.

Key details for St. Louis to Mexico flights

Low season

September

Cheapest flight

$102
Beat the crowds with an average 69% drop in travelers.
The most popular month to fly with an average 27% increase in travelers.
One-way flight from St. Louis to Guadalajara

Your St. Louis to Mexico flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • Is now a good time to book a flight from St. Louis to Mexico?

    Yes. Fares from St. Louis to Mexico are low right now. As a rule of thumb, a round-trip under $493 (cheaper than most fares this year) is a good deal, so if you spot one at or below that, it's a good time to book.

  • How much should I budget for a flight from St. Louis to Mexico?

    Over the past 12 months, round-trip fares from St. Louis to Mexico have ranged from $493 to $786.

  • What are the main airports serving Mexico?

    Mexico has 26 airports. The three busiest are Cancun (CUN) (44% of arrivals), San José del Cabo Los Cabos (SJD) (11%) and Mexico City Benito Juarez (MEX) (10%).

  • What airlines fly nonstop from St. Louis to Mexico?

    Based on the flight schedule for the next 3 months, 3 airlines offer nonstop flights on this route:

    • Southwest
    • Frontier
    • American Airlines

  • Where in Mexico can I fly nonstop from St. Louis?

    Based on the flight schedule for the next 3 months, you can fly nonstop from St. Louis to two destinations: Cancún and San José del Cabo.

  • Is it cheaper to fly with a layover from St. Louis to Mexico?

    No, nonstop flights from St. Louis to Mexico are typically the cheaper option, averaging $530 over the past 12 months.

  • How long is a flight from St. Louis to Mexico?

    Nonstop flights take 3h 14m on average. The fastest scheduled flight takes 3h 05m, from Lambert-St Louis (STL) to Cancun (CUN).

  • Which cabin classes are available on flights from St. Louis to Mexico?

    On flights from St. Louis to Mexico you can book Economy Class, Premium Economy Class, Business Class or First Class.

  • What are some popular landmarks in Mexico?

    KAYAK travelers' favorite landmarks in Mexico include:

    • Plaza de la Constitucion
    • El Ángel de la Independencia
    • Mexico City Stadium
    • Estadio GNP Seguros

  • What are the earliest and latest flights from St. Louis to Mexico?

    The earliest nonstop flight from St. Louis to Mexico departs at 6:00 am and the latest departs at 12:20 pm. Nonstop flights take about 3h 14m.

Your guide to booking St. Louis to Mexico flights

Get tips on when to book, when to fly and what to know before your trip.
  • If you can plan ahead, the sweet spot for booking your flight is 4 weeks before your trip. KAYAK data shows fares in this window are around 15% lower than last-minute bookings (made within 2 weeks of departure). Not ready to commit? Set a Price Alert and we'll let you know when prices change.
  • If your travel dates are flexible, book your trip for January when flights are typically cheapest and avoid December when prices are at their highest.
  • Flying on Tuesday is usually the cheapest. Flights on Saturday cost about 13% more on average, so being flexible with your travel dates could help you save.
  • If you're looking to save, Cancun (CUN) is the cheapest airport to fly into from St. Louis. If you have onward travel, don't forget to factor in the cost of your journey by train, bus or domestic flight.
  • Start your trip in Cancún, which is the most popular destination in Mexico. From there, it's easy to continue on to other popular destinations such as Playa del Carmen, Cabo San Lucas and Puerto Vallarta.
  • Whether you're trying to save time or money, the St. Louis to Mexico nonstop route is usually your best option.

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 4214 reviews
7.5Entertainment
8.0Comfort
7.0Food
8.1Boarding
8.6Crew
Airline reviews

Trash experience on all my flights this week. Delay after delay. The flight I’m waiting for has been delayed 6 times and nearly 3 hours.

2.0 MediocrePhilip, Sep 2026
Read more Southwest reviews

Trash experience on all my flights this week. Delay after delay. The flight I’m waiting for has been delayed 6 times and nearly 3 hours.

Exceptional. The gate crew responded quickly and got me onto this earlier flight as the final passenger, saving me more than four hours of wait time for my reserved flight.

The flight was delayed due to earlier issues at other airports. The crew was excellent & made it a good trip.

Snacks are always pretzels. Why can't you also offer peanuts ?

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

Very good. Sad to learn Southwest is going start to charge for bags

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

The flight was promptly on schedule and Southwest delivered everything they promised. No excuses for any shortfalls just 100% ownership of their responsibilities and business. The boarding and seating policy is a complete shambles. What started out as a great idea when Southwest first hit the market has been turned into a disaster due to the lack of integrity in many of the people who fly Southwest and take advantage of Southwest generosity at the expense of their fellow passengers.

Crew was excellent - Plane was fine. Media was good, could use more kid shows; Not a fan of the brownie brittle -- snack could be slightly better.

Left on time and arrived early. Brand new plane and no parts missing. Comfortable seats. The actual Captain spoke prior to the flight and reassured everyone about safety. Crew was so nice and fun. Perfect flight!

Great Brasilia aircraft - not a Boeing 757 like the next part of the flight. Flight from MCI to IAD was great, on-time, comfortable, did I mention that? The flight from IAD to EDI was painful. One of the reasons I won't fly United again? Boeing 757, with a seat pitch and material that was horrendous. Worst aircraft ever, made worse by United sardine-can tight seating. Oh, and the connection window, 45 minutes, really? At IAD, in different concourses? What idiot came up with that flight scenario? Happily, (for me and my travel insurance people) the flight was late (reminiscent of American Airlines). The crew was professional and courteous.

On boarding crew at the airport called in the boarding numbers too early meaning before the previous line was completed resulting in later numbers getting to board ahead. Also she asked those who boarded from number 3 to have the tags in their carry-on bags and leave it in the jet bridge. Most of the overhead bins were empty though. This is more work for the ground staff in addition to more inconvenience for passengers waiting to get their carry-ons from the jet bridge.

The flight to America was freezing. The overnight flight back to the UK was boiling hot and the cabin stank of toilet or occasionally perfume, even though I was several rows back from either bathroom. Food was tiny portions. Two small pieces of tough and dry beef in random gravy with pretend mashed potato raking up most of it. Very little veg. Salad was ok. Wooden cutlery broke within minutes of using. Lots of old films for entertainment. Some new ones. Generally a bit rubbish.

I almost missed my connection in Chicago due to having to wait on a gate to be open I am assuming. Having to run from E terminal to C terminal and I barely made it there before they closed the door. This may not be the actual airline's fault it's crazy how there is so little time between flight especially when they are placed so far apart in the airport.

Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.

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.

Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.

Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.

Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.

Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.

Staff in first class seemed to struggle to provide service to both sections. I didn’t get breakfast though I requested it. I only got coffee after asking the opposite side flight attendant and then could never see them to request a bottle of water.

My luggage was not sent with us. Not sure if this is Envoy Air responsibility but that was a very BAD experience

American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

No enough space plus only allowing one laggage instead of two like other airlines.

Qatar airways ,boarding arrangements at Hamid international airport could been better

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

Overall boarding and debarking is a joke. I dont even bring luggage anymore on trips because you can never allow them to be place then in the overhead bin or you have to pay or you check them which is even worse having to wait for your luggage on the tarmac.

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

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

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.

The app doesn’t work. I am having a lot of trouble checking in for flight tomorrow. Very disconcerting. Then they es t to charge extra for checking in at the airport;(

To many extra fees, poor customer service and very uncomfortable flight. No leg room and seat wont recline.

I am disabled and was unable to get any assistance from Volaris. I had to wait in line at front desk for 45 minutes, I am by myself, and unable to stand. When I got to front desk check in, they had no assistance for me. I did however, have wheelchair assistance when I arrived in Mexico City. Thank God for that!

Our flight got overbooked and we missed one day of our trip.

Be prepared to pay extra for everything! I'm not sure I really saved any money?

Check in at LAX was terrible. Unbelievable lines. Chaos. The landing in Morelia was scary, with the plane fishtailing. If other airlines flew directly between California and Morelia, I would never fly Volaris again.

My experience with Frontier was terrible. We were delayed for 2 hours. At one point during the wait at the gate I left to go get a sandwich - I was gone probably 15 minutes. In my absence, they decided to move our flight up, boarded and left. When I came back the two attendants were very rude and I unavoidably had to purchase another ticket on the next flight. During this whole time, the Frontier app did not update the departure time, so I was SOL.

Flight delayed 9 hours. On tarmac for over an hour after arrival. Will never book with Frontier under any circumstances ever again.

My ATL–CVG Frontier flight was disappointing due to both an operational issue and unprofessional customer service. After everyone had boarded and the aircraft had pushed back from the gate, we were delayed because the passenger count did not match the flight manifest. The crew counted passengers approximately six times before the aircraft returned to the gate and gate agents boarded to help resolve the discrepancy. We were ultimately advised that a family had been allowed to board but not all of their boarding passes had been properly scanned. This resulted in a departure delay of nearly an hour. I did appreciate that the pilot kept passengers informed and tried to reassure us that some of the delay could be recovered during the flight. My greater concern was the customer-service experience. I am a Frontier Elite Platinum member and was seated within the first five rows. When I boarded, the overhead bins near my seat were already closed. I opened two bins to see whether my small backpack would fit. A female flight attendant sharply told me that a closed bin meant it was full, although the second bin clearly had available space. When I tried to ask whether I could simply place my backpack in that available space, she ignored me. Later, while the gate agents were working to resolve the passenger-count problem, I heard the same flight attendant make jokes about how many gate agents it takes to count passengers. She then made unnecessary comments about the male gate agent doing the count, men thinking they can do things better than women, and women knowing better and outliving men. Later in the flight, she also commented that passengers should know that the first thing they need to do is always be nice to the flight attendants. Courtesy absolutely should go both ways. Flight attendants deserve respect from passengers, but passengers also deserve respectful and professional treatment from the crew. Joking about colleagues who were actively trying to correct an operational problem, making gender-based comments in front of passengers, and being dismissive toward a passenger asking a simple baggage question were unnecessary and unprofessional. I fly enough to understand that delays and mistakes happen. What determines the quality of the experience is how those situations are handled. Unfortunately, the customer-service attitude on this flight made an already frustrating operational delay considerably worse.

Did not get on the flight, they had a gate change and my app never updated me! Trying to get flight credit

Flight was delayed by about an hour, once we arrived at LAX we had to take a shuttle to the baggage claim - it was completely disorganized. The agents at the shuttles were rude and unable to provide any information. Frontier charges extra for everything from bags to drinks - at the end it ends up being more expensive than flying the better airlines

Sat in the airport waiting for my flight for 5 hours. Finally got on the plane only to be thrown off and told that my flight was cancelled. Zero customer service. Nobody spoke to us. Just the worst

When I was boarding my departure from Raleigh to Orlando I was inappropriately scolded by a female dog named Mia because I didn’t pay in advance for my carry on bag ($75). Frontiers website is confusing regarding pre-paying for carryons so it was a simple mistake. I also had paid for “upfront plus” meaning me and my son were seated in the front row with no one in the middle seat ($450 upgrade). When we were boarding Mia said “sir, you didn’t pay for your carryon” in a not so polite tone and told me to get out of line and come back to the counter to pay for my carryon. The way they had the retractable rope left me no room to circle back without making the people behind me move so I just stood there and then she said a second time “sir!! Go pay for your carryon” in an embarrassing tone. I then moved their rope so I could get back to the counter when a second female dog then asked “are you done!?!?” because I had said “do you want me to bulldoze the people behind me?” I then said you do realize I paid over $400 for upfront plus so I was certainly not trying to sneak a carryon bag without paying. Long story short, I am soooo done with discount airlines!!! By the time you pay for all the “extras” you might as well have paid for Delta Southwest or American! Frontier airlines sucks and I was embarrassed by a female dog named Mia!!!

I don’t know. I’m in the airport Later y will try to have my ticket

I have come to accept Frontier as an absolute no-frills airline, paying for everything I want. A 4.5-hour flight should provide me with a complimentary beverage—rather, $4.9x for a soda. Or a bottle of water ought to be extended at no cost. 4 beers are on the menu, but only 1 type of beer is available (at $9.95). Also, so many restrictions to using a voucher from Barclay‘s Credit Card. Finally, try to reach a live agent for Frontier- impossible!

Got ripped off by chatdeal. For 318 would like my money back. Neal. Did not take flight

More options for your flight from St. Louis to Mexico

Complete your trip to Mexico with a hotel stay or car rental