STL - MEX

$147 Find Cheap Flights from St. Louis to Mexico City - Compare and Save

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 City departing on 9/1. 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

Save 20% or more on flights. Compare deals from all over the web.

Never overpay with our price tracking tools.

Filter searches by price, airline and more to find your best flights.

Everything you should know

Cheapest round-trip
$371
Typical prices: $655-$750
Multiple Airlines
Tue 8/4Mon 8/17
STL - MEX • 1 stop
Cheapest one-way
$147
Typical prices: $383-$473
Multiple Airlines
Tue 9/1
STL - MEX • 1 stop
Top airlines
Cheapest • from $385 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Mexico City. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $422 (round-trip)
Shortest trip • 6h 13m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 38% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 16% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Mexico City!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Mexico City (STL-MEX)

 
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 City 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 City

Tue, Aug 4 - Mon, Aug 17
Multiple Airlines Logo
3:41 pm - 10:45 pm
STL
-
MEX
8h 04m
1 stop
Multiple Airlines Logo
11:05 am - 11:59 pm
MEX
-
STL
11h 54m
1 stop
$371Multiple Airlines
Thu, Aug 6 - Tue, Aug 11
Frontier Logo
3:41 pm - 10:45 pm
STL
-
MEX
8h 04m
1 stop
Frontier Logo
8:45 pm - 2:23 pm
MEX
-
STL
16h 38m
1 stop
$379Frontier
Wed, Oct 14 - Wed, Oct 21
Frontier Logo
8:10 pm - 5:30 pm
STL
-
MEX
22h 20m
1 stop
Frontier Logo
8:40 am - 7:15 pm
MEX
-
STL
9h 35m
1 stop
$385Frontier
Sat, Aug 15 - Mon, Aug 24
Frontier Logo
3:41 pm - 10:45 pm
STL
-
MEX
8h 04m
1 stop
Frontier Logo
8:40 am - 7:13 pm
MEX
-
STL
9h 33m
1 stop
$390Frontier
Mon, Oct 12 - Tue, Oct 20
Multiple Airlines Logo
6:41 pm - 10:45 pm
STL
-
MEX
29h 04m
1 stop
Multiple Airlines Logo
6:20 am - 9:40 am
MEX
-
STL
26h 20m
2 stops
$391Multiple Airlines
Wed, Sep 9 - Mon, Sep 14
Multiple Airlines Logo
10:35 am - 10:45 pm
STL
-
MEX
13h 10m
2 stops
Multiple Airlines Logo
7:00 am - 5:44 pm
MEX
-
STL
9h 44m
1 stop
$396Multiple Airlines
Mon, Oct 26 - Sun, Nov 1
Multiple Airlines Logo
6:41 pm - 8:00 pm
STL
-
MEX
26h 19m
2 stops
Multiple Airlines Logo
6:40 am - 3:52 pm
MEX
-
STL
9h 12m
1 stop
$399Multiple Airlines
Wed, Oct 14 - Mon, Oct 26
Multiple Airlines Logo
8:10 pm - 5:30 pm
STL
-
MEX
22h 20m
1 stop
Multiple Airlines Logo
6:20 am - 9:40 am
MEX
-
STL
50h 20m
2 stops
$400Multiple Airlines
Mon, Aug 10 - Mon, Aug 17
Multiple Airlines Logo
4:57 pm - 10:15 pm
STL
-
MEX
30h 18m
2 stops
Multiple Airlines Logo
11:05 am - 11:59 pm
MEX
-
STL
11h 54m
1 stop
$402Multiple Airlines
Thu, Oct 1 - Mon, Oct 19
Multiple Airlines Logo
6:41 pm - 10:45 pm
STL
-
MEX
29h 04m
1 stop
Multiple Airlines Logo
6:20 am - 9:40 am
MEX
-
STL
26h 20m
2 stops
$408Multiple Airlines
Booking Insights

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

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

How much is a round-trip flight from St. Louis to Mexico City?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Mexico City departing in August.

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

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 City, 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 City is April, where tickets cost $572 (return) on average. On the other hand, the most expensive months are December and January, where the average cost of round-trip tickets is $820 and $745 respectively.

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

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 City, 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 City, you should book around 3 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$147
Best time to beat the crowds but there is an average 9% increase in price.
Most popular time to fly with an average 7% increase in price.
Flight from St. Louis to Mexico City

When to book flights from St. Louis to Mexico City

Are your dates flexible? Find out the best times to travel from St. Louis to Mexico City based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Mexico City

  • What is the cheapest flight from St. Louis to Mexico City?

    In the last 5 days, the lowest price for a flight from St. Louis to Mexico City was $150 for a one-way ticket and $371 for a round-trip.

  • Do I need a passport to fly between St. Louis and Mexico City?

    A passport is required to fly from St. Louis to Mexico City.

  • Which airports will I be using when flying from St. Louis to Mexico City?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Mexico City, also known as Mexico City Benito Juarez.

  • Which aircraft models fly most regularly from St. Louis to Mexico City?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Mexico City?

    SkyTeam, oneworld, and Star Alliance are the airline alliances operating flights between St. Louis and Mexico City, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Mexico City, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Mexico City are Delta and United Airlines. With an average price for the route of $684 and an overall rating of 7.8, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $688 and an overall rating of 7.4.

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

    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 City.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Mexico City from St. Louis 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 City?

    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 to Mexico City with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and MEX can sometimes prove cheaper using this method.

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

    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 to Mexico City from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from St. Louis to Mexico City

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Mexico City. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Mexico City? 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.
7.8
DeltaOverall score based on 8462 reviews
7.2Food
7.8Entertainment
8.1Boarding
7.8Comfort
8.5Crew
Airline reviews

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

10.0 ExcellentPaula, Jun 2026
STL - ATL
Read more Delta reviews

From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.

With Aeromexico it ended up good but with Delta it was bad because we did everything through Delta... Showed up at the Delta terminal... It was the wrong place! Nothing ever told us to go to the Aeromexico terminal. It said "in partnership with Aeromexico" but I was never instructed to check in with them or go to their terminal. We had to haul @$$ running through the airport and almost didn't make it thanks to this poor communication. 👎🏽

Excellent!!! Aeromexico is a great airline. What was not that good is the service provided by Kayak. It is never clear and not easy to manage.

Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!

My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.

They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.

Overpriced tickets and attitudes to pay for such service. So bummed.

Typical flying experience in the US. Nothing particularly good or bad.

I had a great travel experience as there weren't any delays and I was able to get to Mexico City on time for conference.

Didn’t feel that same attention and carénese as other crew members

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.

I needed internet for critical matters and it never worked.

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.

Seats had less pitch than a regional jet. Food was OK. Have to buy alcohol on US based carriers flying international. Boarding was a mess. Did not have bags but overhead space was gone quick. Would like to see the airlines enforce the one bag over and one bag under policy

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.

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

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.

Terrible! After boarding we were stuck on the plane for 3 hours with no air circulation during a heat wave.

All planes flying to Mexico City are very old. Seats don’t even have power outlets.

I bought internet for the flight. Don’t waste your money. I wasn’t able to download a 1 Mb file from Google Docs during a 3-4 hr period. You can only use WhatsApp and email if you are willing to wait.

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.

The flight was very smooth and the meal in business class was great.

Delayed multiple times. Boarding was ok but getting off the aircraft was a mess. So disorganized with staff trying to help the elderly but completely blocking path for anyone else to move. Bathroom was disgusting, probably caused by one of the customers but staff couldn't care less to help clean it. No one wanted to use it since the floor was completely soaked so everyone just lined up the other restroom while the staff just chit chat with each other while looking at us.

I think the seats on some of their planes are uncomfortable. You can be ok on a short flight of two hours but no more than that. The delays, and also the refreshments on the plane were not enough.

Terrible, oxygen masks were deployed mid-flight. We returned to airport. Took additional 12 hours to get home.

Lack of information. No meal for a 6hr international flight that departs during dinner time

The announcements for loading at the gate for my flight from Phoenix to Mex City was all in Spanish. The English only speaking flyers had no idea the plane was loading.

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

Information on your arrival and departure airports