HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Hermosillo

$231+ Cheap flights from St. Louis (STL) to Hermosillo (HMO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HMO
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

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 Hermosillo
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 November 13, 2025.

This American Airlines deal was found by Cheapflights users on 11/11. 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.
Wed 4/12:26 pmSTL - HMO
1 stop22h 58mAmerican Airlines
Sun 4/512:55 pmHMO - STL
1 stop8h 52mAmerican Airlines
Deal found 11/11$734

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 November 13, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$727
(American Airlines)
Provider with most accurate pricing for Lambert-St Louis-Hermosillo Gen Pesqueira Garcia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Lambert-St Louis-Hermosillo Gen Pesqueira Garcia flights.
Search Deals
From Lambert-St Louis to Hermosillo Gen Pesqueira Garcia
Search Deals

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 November 13, 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

Wed 4/1

2:26 pm-11:24 am

1 stop22h 58m

Hermosillo Gen Pesqueira Garcia

Sun 4/5

12:55 pm-11:47 pm

1 stop8h 52m

$734

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Wed 12/3

7:43 pm-8:55 am

3 stops38h 12m

$231

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Thu 12/4

3:30 pm-7:33 pm

3 stops53h 03m

$236

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Thu 12/4

2:37 pm-12:26 pm

1 stop22h 49m

$341

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Wed 12/3

7:38 am-12:26 pm

1 stop5h 48m

$350

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/13

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Hermosillo. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from St. Louis to Hermosillo?

    A quick flight from St. Louis to Hermosillo can take about 22h 58m. American Airlines provides one of the quickest options available for as low as $734. The distance between St. Louis and Hermosillo is about 1355 mi.

  • Can I find deals for flights from St. Louis to Hermosillo that include hotel bookings?

    Yes. In addition to deals on St. Louis to Hermosillo flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Hermosillo?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Hermosillo.

  • Can I find deals for business class flights from St. Louis to Hermosillo?

    Yes. Cheapflights offers flight deals from St. Louis to Hermosillo by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Complete your trip

Complete your trip to Hermosillo by adding a car rental and/or hotel reservation to your travel itinerary.
Hermosillo car rentals
Hermosillo Gen Pesqueira Garcia Airport car rentals
Ciudad Obregón car rentals

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.