$112 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 3/11. 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

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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Everything you should know

Cheapest round-trip
$262
Frontier
Thu 2/19Wed 2/25
CUN - STL • 2 stops
Cheapest non-stop
$297
Typical prices: $238-$394
Frontier
Wed 2/25Wed 3/4
CUN - STL • Non-stop
Top airlines
Southwest
Most flights • 13 per week
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Top routes
CUN
-
STL
Cheapest
PVR
-
STL
Most popular
Insights
Insights
Insights
Insights
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 St. Louis!
Flight Deals
Booking Insights
Flight Deals

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

Thu, Feb 19 - Wed, Feb 25
Frontier Logo
11:27 am - 6:51 am
CUN
-
STL
20h 24m
2 stops
Frontier Logo
8:17 pm - 8:51 am
STL
-
CUN
11h 34m
1 stop
$262Frontier
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
4:45 pm - 10:59 pm
CUN
-
STL
7h 14m
1 stop
United Airlines Logo
6:25 am - 3:33 pm
STL
-
CUN
8h 08m
1 stop
$268United Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
3:18 pm - 9:40 pm
CUN
-
STL
7h 22m
1 stop
United Airlines Logo
6:55 pm - 11:25 am
STL
-
CUN
15h 30m
2 stops
$270United Airlines
Thu, Feb 19 - Mon, Feb 23
United Airlines Logo
1:22 pm - 10:59 pm
CUN
-
STL
10h 37m
1 stop
United Airlines Logo
7:41 am - 3:33 pm
STL
-
CUN
6h 52m
1 stop
$272United Airlines
Mon, Mar 16 - Mon, Mar 23
Frontier Logo
4:09 pm - 11:19 pm
CUN
-
STL
31h 10m
2 stops
Frontier Logo
12:16 pm - 12:37 pm
STL
-
CUN
24h 21m
1 stop
$293Frontier
Wed, Feb 25 - Wed, Mar 4
Delta Logo
1:40 pm - 11:36 pm
CUN
-
STL
10h 56m
1 stop
Delta Logo
10:13 am - 9:11 pm
STL
-
CUN
9h 58m
1 stop
$302Delta
Mon, Mar 16 - Mon, Mar 23
Delta Logo
2:00 pm - 11:58 pm
CZM
-
STL
8h 58m
1 stop
Delta Logo
6:00 am - 12:45 pm
STL
-
CZM
7h 45m
1 stop
$469Delta
Tue, Feb 17 - Tue, Feb 24
American Airlines Logo
3:55 pm - 8:55 am
PVR
-
STL
17h 00m
2 stops
American Airlines Logo
5:12 am - 3:35 pm
STL
-
PVR
10h 23m
1 stop
$537American Airlines
Tue, Mar 17 - Tue, Mar 24
American Airlines Logo
12:46 pm - 8:55 am
MLM
-
STL
19h 09m
1 stop
American Airlines Logo
7:00 am - 11:56 am
STL
-
MLM
5h 56m
1 stop
$573American Airlines
Thu, Feb 19 - Wed, Feb 25
Aeromexico Logo
3:06 pm - 8:41 pm
CZM
-
STL
29h 35m
2 stops
Aeromexico Logo
7:10 am - 1:55 pm
STL
-
CZM
6h 45m
1 stop
$902Aeromexico
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.

If traveling to St. Louis, the cheapest city to fly from in the last 3 days was Cancún, with flights as low as $112 one-way and $262 round-trip. Flights from Puerto Vallarta are the most searched and start at $419 for a return trip.

Good to know

Low seasonNovember
Cheapest flight$112
Best time to beat the crowds but there is an average 12% increase in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Cancun to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    If traveling to St. Louis, the cheapest city to fly from in the last 3 days was Cancún, with flights as low as $112 one-way and $262 round-trip. Flights from Puerto Vallarta are the most searched and start at $419 for a return trip.

  • 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 $349. The cheapest price found on KAYAK in the last 2 weeks cost $212 and departed from Puerto Vallarta Ordaz Airport.

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

    Based on KAYAK data, the cheapest day to fly to St. Louis is Sunday where tickets can be as cheap as $176. On the other hand, the most expensive day to fly is Monday, where prices are $366 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 flights cost $183 on average. The most expensive time of day to fly to St. Louis is generally in the evening, which is peak travel time and where the average cost of a ticket is $372.

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 $332
  • 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 airline 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.
7.4
United AirlinesOverall score based on 9222 reviews
7.7Boarding
7.3Comfort
7.1Entertainment
8.1Crew
6.6Food
Airline reviews

Great other than a couple very drunk guys that for a while kept bumping my seat from behind. The staff did their best to control them. Even refused serving them alcohol and allowed the gal sitting next to them to move.

8.0 ExcellentAnonymous, Feb 2026
FRA - IAD
Read more United Airlines reviews

Great other than a couple very drunk guys that for a while kept bumping my seat from behind. The staff did their best to control them. Even refused serving them alcohol and allowed the gal sitting next to them to move.

The attendant on board was amazing. She should be doing business/first international long haul.

The boarding was cumbersome. The staff was not aligned. They called group 1 but then the agent said no. Then they called group 1 again but still would not board us. Then they called group 2 and they all came up and still hadn’t started boarding. Then someone came from the plane and said why is no one coming? And the agent said bc i thought not yet and she said I said over the walkie talkie to send the passengers down? What was not clear about that? Also, onboard, the crew gave announcements very ironic/authoritative, and in first class they gave us a cheesebox. My expectations based on competition airlines, is a warm meal. A little underwhelming.

I was fully checked in the prior night and i was unchecked and then didn’t have a seat when I boarded. Instead of an aisle seat, I was out in the middle seat of the very last row of the plane.

In overall it was a good experience, the only down point was that the entertainment screen was working properly.

This Japanese airline provides great service and very helpful in assisting their passengers.

Good crew. Boarding delays. Almost two hours wait for the bags in DC.

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.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Seated dude next to me even though lots of empty rows. But main thing was we sat on the tarmac after landing for 30 minutes because of, in the words of the dude who sat next to me, “operational incompetence”. We got changing directions about where to pick up gate checked bags. Pilot and flight attendant were awesome though.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
O'Fallon
Wentzville
Farmington
Eureka
Litchfield
Grafton
Shrewsbury
Glencoe

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

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