$716+ Cheap flights from St. Louis (STL) to Hermosillo (HMO)
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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HMO
Nov 29 — Dec 61
1 adult, Economy
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Find cheap flights from St. Louis to Hermosillo 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.Find flight deals from St. Louis to Hermosillo
Best flights from St. Louis to HermosilloDiscover carefully curated flight deals from St. Louis to Hermosillo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2025.
Discover carefully curated flight deals from St. Louis to Hermosillo that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2025.
This Aeromexico deal was found by Cheapflights users on 10/27. 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 Aeromexico is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/76:00 amSTL - HMO
2 stops18h 04mAeromexico
Wed 4/86:05 amHMO - STL
2 stops15h 35mAeromexico
Deal found 10/27![Aeromexico logo]()
$716
This American Airlines deal was found by Cheapflights users on 10/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/75:34 amSTL - HMO
2 stops7h 55mAmerican Airlines
Wed 4/812:55 pmHMO - STL
1 stop8h 52mAmerican Airlines
Deal found 10/28![American Airlines logo]()
$806
Cheap flight deals from St. Louis to Hermosillo
Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Hermosillo (HMO). 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 October 30, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $716 (Aeromexico) |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Hermosillo 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 2,558,603 searches. Data last updated October 30, 2025.
Use the filters below to find and compare flights from St. Louis to Hermosillo that are best for you.
Fly from
St. Louis
Fly to
Hermosillo
Route
Depart
Return
Price
St. LouisHermosillo
STL - HMO
STLHMO
Lambert-St Louis
Tue 4/7
6:00 am-10:04 pm
2 stops18h 04m
Hermosillo Gen Pesqueira Garcia
Wed 4/8
6:05 am-11:40 pm
2 stops15h 35m
$716
St. LouisHermosillo
STL - HMO
STLHMO
Lambert-St Louis
Tue 4/7
5:34 am-11:29 am
2 stops7h 55m
Hermosillo Gen Pesqueira Garcia
Wed 4/8
12:55 pm-11:47 pm
1 stop8h 52m
$806
Compare providers for flights from St. Louis to Hermosillo
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 Hermosillo in October.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star |
- Most accurate provider: When it comes to deals on St. Louis-Hermosillo flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Hermosillo flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Hermosillo flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on St. Louis-Hermosillo flights, Cheapflights users trust Expedia the most. Expedia 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-Hermosillo 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 Hermosillo
Have a flexible travel schedule? Discover the best time to fly to Hermosillo from St. Louis with our price prediction graph.
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.