$189 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 8/6. 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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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

Tue, Jul 28 - Tue, Aug 4
Frontier Logo
8:45 pm - 2:23 pm
MEX
-
STL
16h 38m
1 stop
Frontier Logo
3:41 pm - 10:45 pm
STL
-
MEX
8h 04m
1 stop
$305Frontier
Tue, Sep 1 - Wed, Sep 2
Frontier Logo
8:40 am - 7:23 pm
MEX
-
STL
9h 43m
1 stop
Frontier Logo
3:33 pm - 10:45 pm
STL
-
MEX
8h 12m
1 stop
$311Frontier
Tue, Sep 1 - Wed, Sep 2
Frontier Logo
8:40 am - 7:23 pm
MEX
-
STL
9h 43m
1 stop
Frontier Logo
3:33 pm - 10:45 pm
STL
-
MEX
8h 12m
1 stop
$313Frontier
Tue, Jul 7 - Mon, Jul 13
Multiple Airlines Logo
11:00 am - 6:05 pm
MEX
-
STL
30h 05m
1 stop
Multiple Airlines Logo
7:10 pm - 8:05 pm
STL
-
MEX
25h 55m
1 stop
$365Multiple Airlines
Thu, Aug 27 - Mon, Aug 31
United Airlines Logo
12:19 pm - 10:10 am
PVR
-
STL
20h 51m
1 stop
United Airlines Logo
3:13 pm - 11:10 am
STL
-
PVR
20h 57m
1 stop
$367United Airlines
Wed, Jul 8 - Mon, Jul 13
Multiple Airlines Logo
11:00 am - 6:15 pm
MEX
-
STL
30h 15m
1 stop
Multiple Airlines Logo
7:10 pm - 8:05 pm
STL
-
MEX
25h 55m
1 stop
$375Multiple Airlines
Wed, Jul 29 - Wed, Aug 5
Delta Logo
12:35 pm - 11:53 pm
CUN
-
STL
11h 18m
2 stops
Delta Logo
6:30 am - 1:01 pm
STL
-
CUN
6h 31m
1 stop
$397Delta
Thu, Jul 23 - Sun, Jul 26
United Airlines Logo
5:22 pm - 8:39 am
CUN
-
STL
15h 17m
2 stops
United Airlines Logo
6:00 am - 2:26 pm
STL
-
CUN
8h 26m
1 stop
$407United Airlines
Thu, Jul 23 - Sun, Jul 26
Southwest Logo
3:20 pm - 6:25 pm
CUN
-
STL
3h 05mnonstop
Southwest Logo
10:55 am - 2:00 pm
STL
-
CUN
3h 05mnonstop
$444Southwest
Sat, Aug 29 - Thu, Sep 10
Delta Logo
9:00 am - 11:31 pm
BJX
-
STL
13h 31m
1 stop
Delta Logo
10:55 am - 4:50 pm
STL
-
BJX
6h 55m
1 stop
$582Delta
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 5 days.

In the last 5 days, the cheapest flight deal to St. Louis was found on the route from Cancún, at $305 return. The most popular connection is from Puerto Vallarta to St. Louis and KAYAK users have found round-trip deals for as low as $367 in the last 5 days.

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

The average price of all round-trip flights to St. Louis clicked on KAYAK for each day over the last 12 months.

Based on KAYAK data, the cheapest day to fly to St. Louis is Saturday where round-trip tickets can be as cheap as $243. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $613 on average.

What is the cheapest month to fly to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights to St. Louis, 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 to St. Louis is September, where tickets cost $200 on average for return flights. On the other hand, the most expensive months are October and January, where the average cost of tickets from Mexico is $506 and $435 respectively. For one-way flights, the best month to travel is December with an average price of $126.

What is the cheapest time of day to fly to St. Louis?

The average price for all round-trip flights to St. Louis depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.

The cheapest time of day to fly to St. Louis is generally in the morning, when round-trip flights cost $243 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.

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 Cancun $674 round-trip.

Good to know

Low seasonOctober
Cheapest flight$189
Best time to beat the crowds but there is an average 3% increase in price.
Most popular time to fly with an average 7% increase in price.
Flight from Cancun to St. Louis

FAQs - booking St. Louis flights

  • What is the cheapest flight to St. Louis?

    In the last 5 days, the cheapest flight deal to St. Louis was found on the route from Cancún, at $305 return. The most popular connection is from Puerto Vallarta to St. Louis and KAYAK users have found round-trip deals for as low as $367 in the last 5 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 $503. The cheapest price found on KAYAK in the last 2 weeks cost $196 and departed from Cancun Airport.

  • 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.

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 $467
  • 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.
7.9
DeltaOverall score based on 8405 reviews
8.1Boarding
8.5Crew
7.2Food
7.8Comfort
7.8Entertainment
Airline reviews

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

2.0 MediocreAnonymous, Jun 2026
RDU - LGA
Read more Delta reviews

Gate agent showed up 20 minutes before boarding and was not at all friendly. Had to take this flight due to the one on the day before being cancelled and any later options were already full with long standby lists. Despite having paid for Delta Comfort seats, Delta did not allow me (or anyone) to choose their seat. The agent assigned them for everyone just prior to boarding. Self seat selection was allowed on the original flight. Flight staff was great - very friendly.

Crew helpful. Plenty of food although not great but ok. Good time.

Flight attendants were great. Cheerful, upbeat and friendly. Jet, in particular, was fantastic.

I have Precheck. Flew HPN to DEN and return this past weekend. Delta didn't attach my Precheck number to this trip. So it was waiting in general line especially in Denver. Unavailable.

Original flight was delayed, then cancelled and the gate staff did not expedite rebooking. Also, no instructions were given that a ticket number was needed before being called to facilitate rebooking. This could have been much more organized.

Be on time? When not on time a circling for over an hour offer more than 1 bag of chips to the passengers? It was a 7 hour flight by the time we got done.

Five hour delays every hour, I wish it were all at once

Flight delayed four separate times. I’m now one hour hours late to landing.

worst flight ever from Delta, it got delayed and kept on delaying..

Should never have had to go to Detroit from Orlando back to Tennessee!

The flight got delayed. They forgot to bring the drinks when I asked for it. The toilet is messy.

Horrible! Several delays and then was cancelled! I spent over 24 hours in the airport and was unable to get a hotel or food voucher.

The entertainment is a bit limited, it would be better if they added some games to play besides the movies and tv shows. But the seats are comfortable and the crew is polite

This planes staff was top tier. Everything went great and had a great flight home.

Food was great. Staff was phenomenal. Seats were a bit hard and could use a lot more entertainment options as far as movies to choose from. WiFi was good. Overall great trip.

This was an overnight flight, and in the morning they did know coffee service. How you can throw passengers in a San Francisco airport at 5:40 a.m. in the morning and not giving them Coffee is a crime.

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

The pilot had to extend the flight time from san antonio to Houston to burn off fuel. This caused a lot of unnecessary stress since we had a tight connection to Aruba. And with no other flights going to Aruba we were worried about spending a night in Houston. We had to to run to our connection because of the flight crews mistake. Not happy.

Service was professional and quick. Premium economy seat was comfortable given the class

I'm a United 1K member and have ben for 10 years. The gate agent had no control over the boarding process and had us passengers queued for hours as delays were announced. On the plane, the overhead air nozzle was broken so col over was powering through on me and the passenger next to me. Not a great experience for a million miler on United. Feel free to contact me. Josh Smigel - DM426089

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