$161 Find Cheap Flights from Mexico to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to St. Louis departing on 9/20. 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

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to St. Louis, as well as popular online travel agencies
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Cheap Flights from Mexico to St. Louis

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Mexico to St. Louis 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 Mexico to St. Louis

Fri, Sep 12 - Fri, Sep 19
Frontier Logo
2:49 pm - 6:10 pmCUN-STL
3h 21mnonstop
Frontier Logo
10:21 am - 1:34 pmSTL-CUN
3h 13mnonstop
$367Frontier
Find Deal
Fri, Sep 12 - Fri, Sep 19
Delta Logo
11:15 am - 11:09 pmCUN-STL
11h 54m2 stops
Delta Logo
6:00 am - 5:45 pmSTL-CUN
11h 45m2 stops
$400Delta
Find Deal
Mon, Aug 18 - Mon, Oct 20
 Logo
8:10 am - 9:11 amMEX-STL
24h 01m1 stop
 Logo
7:52 pm - 5:00 pmSTL-MEX
22h 08m1 stop
Mon, Sep 8 - Wed, Sep 10
United Airlines Logo
12:25 pm - 10:08 pmPVR-STL
8h 43m1 stop
United Airlines Logo
6:15 am - 11:27 amSTL-PVR
6h 12m1 stop
$421United Airlines
Find Deal
Mon, Sep 8 - Wed, Sep 10
United Airlines Logo
12:25 pm - 10:08 pmPVR-STL
8h 43m1 stop
United Airlines Logo
6:15 am - 11:27 amSTL-PVR
6h 12m1 stop
$424United Airlines
Find Deal
Mon, Sep 8 - Wed, Sep 10
United Airlines Logo
12:25 pm - 10:08 pmPVR-STL
8h 43m1 stop
United Airlines Logo
6:15 am - 11:27 amSTL-PVR
6h 12m1 stop
$439United Airlines
Find Deal
Fri, Sep 12 - Fri, Sep 19
 Logo
8:00 am - 4:05 pmCUN-STL
8h 05m1 stop
 Logo
10:21 am - 1:34 pmSTL-CUN
3h 13mnonstop
Mon, Sep 8 - Wed, Sep 10
Aeromexico Logo
8:15 pm - 10:02 pmPVR-STL
24h 47m2 stops
Aeromexico Logo
1:26 pm - 11:40 pmSTL-PVR
11h 14m2 stops
$505Aeromexico
Find Deal
Thu, Oct 9 - Thu, Oct 23
Volaris Logo
6:45 am - 6:07 pmMEX-STL
10h 22m1 stop
Volaris Logo
9:47 am - 10:55 pmSTL-MEX
14h 08m1 stop
$667Volaris
Find Deal
Mon, Aug 11 - Tue, Aug 26
Aeromexico Logo
12:05 am - 4:06 pmMEX-STL
15h 01m2 stops
Aeromexico Logo
1:26 pm - 7:40 pmSTL-MEX
7h 14m1 stop
$731Aeromexico
Find Deal
Booking Insights

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

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

What is the cheapest flight to St. Louis?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to St. Louis was found on the route from Cancún, at $367 return. The most popular connection is from Puerto Vallarta to St. Louis and KAYAK users have found round-trip deals for as low as $421 in the last 3 days.

What is a good deal for flights to St. Louis?

If you’re looking for cheap airfare to St. Louis, 25% of our users found tickets to St. Louis for the following prices or less: From Cancún $112 round-trip.


Good to know

Low seasonFebruary
Cheapest flight$161
Best time to beat the crowds but there is an average 8% increase in price.
Most popular time to fly and prices are also 6% lower on average.
Flight from Cancun to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    In the last 3 days, the cheapest flight deal to St. Louis was found on the route from Cancún, at $367 return. The most popular connection is from Puerto Vallarta to St. Louis and KAYAK users have found round-trip deals for as low as $421 in the last 3 days.

  • How far is Lambert-St Louis Airport from central St. Louis?

    The distance between Lambert-St Louis Airport and downtown St. Louis is 13 miles.

  • What is the name of St. Louis’s airport?

    When flying to St. Louis, you'll arrive at Lambert-St Louis Airport (STL). The airport is also known as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl.

  • How much is a flight to St. Louis?

    On average, a flight to St. Louis costs $221. The cheapest price found on KAYAK in the last 2 weeks cost $100 and departed from Cancun Airport.

  • What is the cheapest day to fly to St. Louis?

    Based on KAYAK data, the cheapest day to fly to St. Louis is Monday where round-trip tickets can be as cheap as $286. On the other hand, the most expensive day to fly is Friday, where round-trip prices are $491 on average.

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

    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 to St. Louis.

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

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

    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 St. Louis 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 to St. Louis?

    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 St. Louis 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 St. Louis?

    The cheapest time of day to fly to St. Louis is generally in the morning, when round-trip flights cost $204 on average. The most expensive time of day to fly to St. Louis is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $281.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 1,509 direct flights from within Mexico to St. Louis. The most common day for departures is Sunday, with 17% of flights taking off on this day.

Top tips for finding cheap flights to St. Louis

  • Looking for cheap airfare to St. Louis? 25% of our users found round-trip tickets to St. Louis for the following prices or less: From Cancun $176
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Reviews of the top airlines flying from Mexico to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Mexico to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with to St. Louis? 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.
7.5
AeromexicoOverall score based on 1721 reviews
6.6Food
7.1Entertainment
7.6Comfort
7.4Boarding
7.9Crew
Airline reviews

Flight was on time, good service, but there was no free WiFi, even for first class passengers

10.0 ExcellentJose David, Jul 2025QRO - DTW
Read more Aeromexico reviews

Flight was on time, good service, but there was no free WiFi, even for first class passengers

It was good in general. The Crew during the flight were very nice at all times.

The ground staff were not as friendly and nice to the passengers as the air crew. Flight attendants, cockpit crew were great and very nice to everyone on board.

My flight was delayed, then I got transferred to a new flight that was also delayed- which wasn’t Aeromexico’s fault, it was because of weather conditions. Most of the crew was very nice and patient, except for one or two flight attendants who were rude. The entertainment wasn’t on, so all the screens were off.

My wife's entertainment system did not work. Payed for flight upgrade but did not receive advertised "free WiFi".

Annoying that we had to go to departures and get boarding passes. Should allow us to be booked all the way through, this is the only airline i have this problem with in MEX. Late boarding and take off

the guy in front of me put his seat back immediately...and then left it back including thru landing and taxiing to the runway. attendants did not check/ask him to put it up for landing.

The airplane was an old airplane, seats were very uncomfortable and very little space, they changed my seat and that was no option to get back into my seat even when I was traveling a senior who required assistance.

This is not a low cost airline. Stop acting like o e.

Aeromexico crew made me check my hand luggage in the door of the plane. As soon as I reach Mexico City, I notice that my luggage was opened and 8 games of Nintendo Switch were stolen (700 dllrs value aprox) (the console was there) but the games were stolen. I am very dissapointed of Aeromexico and all the crew. Instead of being a good trip, It was a sad trip

Not good , late, and long. We came home so late and spent so much time flying around and taxiing

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Ok. Get a different kosher caterer. The food was odd.

Food was terrible. Crew was kind but skipped over my row for providing sandwiches and beverages.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

Lost luggage, they need a baggage service representative available all times in Atlanta

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

Information on the airport you'll fly into in St. Louis

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