$139+ Cheap flights from St. Louis (STL) to Mexico City (MEX)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
STL — MEX
Oct 10 — Oct 171
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Mexico City with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Mexico City
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Best
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One-way
Cheapest flights from St. Louis to Mexico CityExplore the most affordable flight options available from St. Louis to Mexico City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
Explore the most affordable flight options available from St. Louis to Mexico City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:10 pm -
1 stop22h 20m
Sat 10/1011:05 am -
1 stop11h 08m
Deal found 9/9![Multiple Airlines logo]()
$347
This FlightHub deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/96:00 am -
1 stop17h 20m
Wed 12/167:55 pm -
1 stop20h 30m
Deal found 9/8![Frontier logo]()
$357
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/410:20 am -
1 stop13h 25m
Wed 10/710:50 pm -
2 stops41h 08m
Deal found 9/7![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/124:30 pm -
1 stop28h 15m
Mon 10/1911:05 am -
1 stop11h 08m
Deal found 9/7![Multiple Airlines logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:35 pm -
2 stops28h 40m
Thu 10/2211:05 am -
1 stop11h 08m
Deal found 9/6![Multiple Airlines logo]()
$364
This Kiwi.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
2 stops32h 46m
Sat 10/108:45 pm -
1 stop16h 40m
Deal found 9/5![Multiple Airlines logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
2 stops32h 46m
Wed 10/148:45 pm -
1 stop16h 40m
Deal found 9/6![Multiple Airlines logo]()
$370
This FlightHub deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:19 pm -
1 stop26h 11m
Wed 10/218:45 pm -
1 stop16h 40m
Deal found 9/8![Frontier logo]()
$374
This Justfly.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/106:00 am -
1 stop17h 20m
Tue 12/157:55 pm -
1 stop20h 30m
Deal found 9/7![Frontier logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:35 pm -
2 stops29h 10m
Wed 10/218:45 pm -
1 stop16h 40m
Deal found 9/6![Multiple Airlines logo]()
$380
This FlightHub deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:14 pm -
1 stop10h 31m
Tue 11/107:55 pm -
1 stop18h 51m
Deal found 9/5![Frontier logo]()
$383
Best flights from St. Louis to Mexico CityDiscover carefully curated flight deals from St. Louis to Mexico City that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
Discover carefully curated flight deals from St. Louis to Mexico City that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 10, 2026.
This Volaris deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Volaris is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:20 am -
1 stop17h 00m
Mon 11/2311:10 am -
1 stop12h 49m
Deal found 9/9![Volaris logo]()
$510
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/259:45 am -
2 stops12h 00m
Mon 11/302:00 pm -
2 stops10h 40m
Deal found 9/5![Delta logo]()
$579
This Justfly.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/307:59 pm -
2 stops51h 46m
Tue 11/36:00 am -
2 stops33h 23m
Deal found 9/6![Frontier logo]()
$712
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:18 pm -
2 stops14h 32m
Thu 11/269:00 am -
2 stops13h 53m
Deal found 9/8![Delta logo]()
$579
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/86:00 am -
2 stops10h 35m
Thu 12/178:55 am -
2 stops15h 10m
Deal found 9/9![Delta logo]()
$579
This Frontier deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/306:20 am -
1 stop11h 25m
Fri 11/66:05 am -
2 stops11h 35m
Deal found 9/5![Frontier logo]()
$722
This Delta deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/67:18 pm -
2 stops14h 27m
Sun 12/209:55 am -
1 stop8h 53m
Deal found 9/9![Delta logo]()
$609
This Volaris deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Volaris is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/296:20 am -
1 stop11h 25m
Mon 11/211:10 am -
1 stop12h 06m
Deal found 9/5![Volaris logo]()
$742
This Delta deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1412:00 pm -
2 stops11h 20m
Wed 10/218:35 am -
2 stops14h 19m
Deal found 9/10![Delta logo]()
$641
This Delta deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2610:14 am -
2 stops11h 06m
Mon 11/26:55 am -
2 stops13h 01m
Deal found 9/8![Delta logo]()
$686
Last-minute flights from St. Louis to Mexico CityDiscover last-minute flight deals from St. Louis to Mexico City. Data last updated September 10, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Mexico City. Data last updated September 10, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/28:10 pm -
1 stop22h 20m
Tue 10/64:10 pm -
2 stops20h 00m
Deal found 9/8![Multiple Airlines logo]()
$379
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/22:29 pm -
2 stops33h 16m
Wed 10/78:45 pm -
1 stop16h 40m
Deal found 9/7![Multiple Airlines logo]()
$387
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/38:10 pm -
1 stop22h 20m
Sat 10/1011:05 am -
1 stop11h 08m
Deal found 9/9![Multiple Airlines logo]()
$347
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/410:20 am -
1 stop13h 25m
Wed 10/710:50 pm -
2 stops41h 08m
Deal found 9/7![Multiple Airlines logo]()
$361
This Kiwi.com deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
2 stops32h 46m
Sat 10/108:45 pm -
1 stop16h 40m
Deal found 9/5![Multiple Airlines logo]()
$366
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/52:29 pm -
2 stops32h 46m
Wed 10/148:45 pm -
1 stop16h 40m
Deal found 9/6![Multiple Airlines logo]()
$370
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/124:30 pm -
1 stop28h 15m
Mon 10/1911:05 am -
1 stop11h 08m
Deal found 9/7![Multiple Airlines logo]()
$363
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:35 pm -
2 stops29h 10m
Tue 10/208:40 am -
1 stop29h 44m
Deal found 9/8![Multiple Airlines logo]()
$384
This FlightHub deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/144:19 pm -
1 stop26h 11m
Wed 10/218:45 pm -
1 stop16h 40m
Deal found 9/8![Frontier logo]()
$374
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/146:35 pm -
2 stops29h 10m
Wed 10/218:45 pm -
1 stop16h 40m
Deal found 9/6![Multiple Airlines logo]()
$380
This Kiwi.com deal was found by Cheapflights users on 9/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/196:35 pm -
2 stops28h 40m
Thu 10/2211:05 am -
1 stop11h 08m
Deal found 9/6![Multiple Airlines logo]()
$364
One-way flights from St. Louis to Mexico CitySearch for one-way flight options from St. Louis to Mexico City. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
Search for one-way flight options from St. Louis to Mexico City. Find affordable one-way fares based on user searches. Data last updated September 10, 2026.
This Kiwi.com deal was found by Cheapflights users on 9/7. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/126:35 pm -
2 stops26h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/7![Multiple Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/216:35 pm -
2 stops25h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$174
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/236:35 pm -
2 stops23h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:35 pm -
3 stops27h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$188
This CheapOair deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/276:20 am -
1 stop11h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Volaris logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/244:30 pm -
1 stop28h 15m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$243
This Kiwi.com deal was found by Cheapflights users on 9/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2212:16 pm -
1 stop10h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/8![Multiple Airlines logo]()
$248
Find flight deals from St. Louis to Mexico City
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Mexico City (MEX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 10, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $347 (Kiwi.com) |
One-way from | $139 (Kiwi.com) |
Popular in | September |
Cheapest in | April |
Average price | $755 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Mexico City that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 10, 2026.
Use the filters below to find and compare flights from St. Louis to Mexico City that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Mon 10/12
6:35 pm-7:45 pm
2 stops26h 10m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$139
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Mon 10/26
6:35 pm-9:30 pm
3 stops27h 55m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$188
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Tue 10/27
6:20 am-4:45 pm
1 stop11h 25m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$228
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Wed 10/21
6:35 pm-2:55 pm
3 stops21h 20m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$236
Quickest round-trip
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Sun 10/25
5:53 pm-10:45 pm
1 stop5h 52m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$249
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Fri 12/4
6:00 am-7:55 pm
1 stop13h 55m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$288
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Sun 9/20
5:19 pm-5:30 pm
2 stops25h 11m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$309
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Sun 11/29
9:09 am-8:25 pm
2 stops35h 16m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$327
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Fri 12/4
4:05 pm-1:20 am
2 stops33h 15m
Mexico City Benito Juarez
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$337
St. LouisMexico City
STL Lambert-St Louis - MEX Mexico City Benito Juarez
STLMEX
Lambert-St Louis
Wed 11/18
6:20 am-11:20 pm
1 stop17h 00m
Mexico City Benito Juarez
Mon 11/23
11:10 am-11:59 pm
1 stop12h 49m
$510
Showing 1-10 of 19 resultsSorted by cheapest first
Compare providers for flights from St. Louis to Mexico City
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Mexico City in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on St. Louis-Mexico City flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Mexico City flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Mexico City flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Mexico City flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Mexico City flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from St. Louis to Mexico City
Have a flexible travel schedule? Discover the best time to fly to Mexico City from St. Louis with our price prediction graph.
STL-MEX
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Mexico City
How far ahead should I book a flight from St. Louis to Mexico City?
The price you pay for your flight from St. Louis to Mexico City may vary depending on when you book. For the best chance of a lower fare, look to book 9 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from St. Louis to Mexico City?
Currently, April is the cheapest month in which you can book a flight from St. Louis to Mexico City (average of $572). Flying from St. Louis to Mexico City in September is currently the most expensive (average of $755). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
How much does it cost to fly round-trip from St. Louis to Mexico City?
Airfare is below average for this route at the moment.
St. Louis to Mexico City flights typically cost between $635 and $765 in October.The cheapest round-trip price found within the last 5 days was $347 on Multiple Airlines (Oct 3-Oct 10).
Reviews of airlines servicing Mexico City
Get insights into the airlines that provide service to Mexico City. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Mexico City. Reviews last updated September 10, 2026.
See what other customers who have flown with Delta,United Airlines, andAmerican Airlines from St. Louis to Mexico City have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
7.8
Entertainment
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Boarding
8.1
Overall
7.8
Entertainment
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Boarding
8.1
Overall
7.8
Entertainment
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Boarding
8.1
Overall
7.8
Entertainment
7.8
Comfort
7.8
Crew
8.5
Food
7.2
Reviews
1 / 20
8.0
ExcellentJorge,Aug 2026
TPA - ATL
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Mexico City. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Top 3 airlines flying from St. Louis to Mexico City
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$428 | Average$698 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$469 | Average$717 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$582 | Average$703 | FlexibilityNo cancel fee | On-time71% |