$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 1/8. 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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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 - Sun, Feb 22
Delta Logo
2:10 pm - 11:10 pmCUN-STL
10h 00m1 stop
Delta Logo
10:00 am - 9:10 pmSTL-CUN
10h 10m1 stop
$280Delta
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Wed, Feb 11 - Mon, Feb 16
United Airlines Logo
12:28 pm - 10:58 pmCUN-STL
11h 30m2 stops
United Airlines Logo
6:00 am - 12:54 pmSTL-CUN
5h 54m1 stop
$281United Airlines
Find Deal
Fri, Dec 12 - Fri, Dec 19
Frontier Logo
11:28 am - 1:50 pmCUN-STL
3h 22mnonstop
Frontier Logo
6:00 am - 10:23 amSTL-CUN
3h 23mnonstop
$317Frontier
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Thu, Feb 19 - Sun, Feb 22
Frontier Logo
1:01 pm - 3:26 pmCUN-STL
3h 25mnonstop
Frontier Logo
6:00 am - 10:23 amSTL-CUN
3h 23mnonstop
$346Frontier
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Thu, Feb 19 - Sun, Feb 22
Frontier Logo
1:01 pm - 3:26 pmCUN-STL
3h 25mnonstop
Frontier Logo
6:00 am - 10:23 amSTL-CUN
3h 23mnonstop
$347Frontier
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Fri, Dec 12 - Fri, Dec 19
Multiple Airlines Logo
12:00 pm - 11:42 pmCUN-STL
12h 42m1 stop
Multiple Airlines Logo
6:00 am - 10:23 amSTL-CUN
3h 23mnonstop
$356Multiple Airlines
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Wed, Jan 21 - Wed, Feb 18
Multiple Airlines Logo
12:00 pm - 4:49 pmMTY-STL
28h 49m1 stop
Multiple Airlines Logo
7:43 pm - 11:59 pmSTL-MTY
28h 16m2 stops
$363Multiple Airlines
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Thu, Mar 12 - Thu, Mar 19
Air Canada Logo
9:10 pm - 3:29 pmCUN-STL
18h 19m1 stop
Air Canada Logo
4:05 pm - 9:50 amSTL-CUN
17h 45m1 stop
$371Air Canada
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Fri, Mar 13 - Fri, Mar 20
Volaris Logo
10:28 am - 1:50 pmCUN-STL
3h 22mnonstop
Volaris Logo
6:00 am - 9:23 amSTL-CUN
3h 23mnonstop
$372Volaris
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Sat, Jan 17 - Sun, Feb 15
Air Canada Logo
9:15 am - 3:29 pmMTY-STL
30h 14m1 stop
Air Canada Logo
4:05 pm - 8:30 pmSTL-MTY
28h 25m1 stop
$464Air Canada
Find Deal

Everything you should know

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
Cheapest round-trip
$280
Delta
Thu 2/19Sun 2/22
CUN - STL • 1 stop
Cheapest non-stop
$317
Frontier
Fri 12/12Fri 12/19
CUN - STL • Non-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
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 $161 one-way and $280 round-trip. Flights from Puerto Vallarta are the most searched and start at $516 for a return trip.

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 $188 one-way - $188 round-trip.

Good to know

Low seasonFebruary
Cheapest flight$161
Best time to beat the crowds but there is an average 24% increase in price.
Most popular time to fly with an average 5% increase in price.
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 $161 one-way and $280 round-trip. Flights from Puerto Vallarta are the most searched and start at $516 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 $224. The cheapest price found on KAYAK in the last 2 weeks cost $173 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 tickets can be as cheap as $283. On the other hand, the most expensive day to fly is Friday, where 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 flights cost $189 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 $398.

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 $188
  • 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 8999 reviews
7.3Comfort
7.1Entertainment
6.6Food
7.7Boarding
8.1Crew
Airline reviews

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.

10.0 ExcellentDr. Joseph, Oct 2025STL - ORD
Read more United Airlines reviews

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.

Flight left on time. Boarding was easy. Arrived to EWR 30 mins early. Luggage was deplaned in good time. Overall a very good experience.

Flight from Rome to SFO was excellent compared To our flight to Europe from SFO. The food was much tastier. You can see how UNITED is skimping, though. Instead of getting something mid flight you had to ask for it. It was not automatically served. There was a cookie at the end of the arrival meal, for example that tasted like it just came out of a box. They used to serve a little container of nuts, now … a tiny container of nuts, mixed with pretzels. This was business class that you really have to pay for! But this is minor complaints compared to the overall. My major complaint is the position of the even numbered seats by the windows. You have to turn around to see your window & the positioning as some other controls are harder to get at. This is compared to the odd number seat that are perfectly aligned.

The person I bought the ticket for didn’t make the flight.

Lately I like the planes have been exceptionally filthy. There’s lines of dust and dirt all across the ceiling in the vents, and the cracks in between the seats are literally full of food. It’s definitely not the quality of service that I was used to with United. I’m also very disappointed with the Wi-Fi! All I wanna do is knock out a few work jobs while I’m trapped in my seat And it spools so bad. They did provide me with a refund, but the process of getting that refund is so complicated. It’s unfortunate.

Another delayed flight. When the delays exceed the duration of the flight, it’s a problem.

Excellent flight. Smooth, efficient boarding. Quick flight. Arrived early at STL.

After boarding the plane in Chicago, the passengers were told that there was a technical problem with the plane. Passengers remained on the plane as they tried to fix the problem. After what was probably an hour passengers were told that there was a need to change planes as the problem was not solved. Passengers disembarked and boarded another plane. After taxing to the runway and waiting for takeoff, passengers were told that owing to the thunderstorm the flight was unable to take off but would try and reroute. After some time passengers were told there wasn't enough fuel for the new route and the plane had to return to the gate for additional fuel. after another log delay the flight got underway. On the plane there was food, drinks, ice or entertainment. We were a glass of water, which appeared rationed. Flight arrived about 5 hours late. The pilot was fantastic and communicated with the passengers throughout the ordeal.

The food quality sucks. One must starve if they do not eat flesh Or wheat based products Some variety would be expected. The trivial amount of snacks and or food is inhumane

Excellent all round, first time flying United. App is very helpful.

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

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