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Hermosillo

$492+ 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 9/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — HMO
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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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 July 3, 2025.

Round-trip from

$492
(American Airlines)
From Lambert-St Louis to Hermosillo Gen Pesqueira Garcia
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Find flight deals from St. Louis to Hermosillo

Cheapest flights from St. Louis to Hermosillo
Explore the most affordable flight options available from St. Louis to Hermosillo. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This American Airlines deal was found by Cheapflights users on 7/3. 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.
Thu 9/116:18 pmSTL - HMO
1 stop19h 32mAmerican Airlines
Tue 9/1612:33 pmHMO - STL
2 stops8h 17mAmerican Airlines
Deal found 7/3$492
This Mytrip deal was found by Cheapflights users on 7/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1110:35 amSTL - HMO
3 stops35h 16mMultiple Airlines
Tue 9/168:27 pmHMO - STL
3 stops39h 08mMultiple Airlines
Deal found 7/3$638
This Delta deal was found by Cheapflights users on 7/2. 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.
Fri 10/179:00 amSTL - HMO
2 stops15h 39mDelta
Sun 10/1910:07 amHMO - STL
2 stops12h 30mDelta
Deal found 7/2$850

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 July 3, 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

Thu 9/11

6:18 pm-11:50 am

1 stop19h 32m

Hermosillo Gen Pesqueira Garcia

Tue 9/16

12:33 pm-10:50 pm

2 stops8h 17m

$492

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Thu 9/11

10:35 am-7:51 pm

3 stops35h 16m

Hermosillo Gen Pesqueira Garcia

Tue 9/16

8:27 pm-1:35 pm

3 stops39h 08m

$638

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Fri 10/17

9:00 am-10:39 pm

2 stops15h 39m

Hermosillo Gen Pesqueira Garcia

Sun 10/19

10:07 am-12:37 am

2 stops12h 30m

$850

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

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.

Reviews of airlines servicing Hermosillo

Get insights into the airlines that provide service to Hermosillo. 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 Hermosillo. Reviews last updated July 3, 2025.
Read reviews from past customers who have flown Delta and American Airlines from St. Louis to Hermosillo. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,970 reviews
Delta
8.0
Very good
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,970 reviews

Crew

8.5

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • 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.

  • What is the cheapest month to book a flight from St. Louis to Hermosillo?

    Currently, October is the cheapest month in which you can book a flight from St. Louis to Hermosillo (average of $414). Flying from St. Louis to Hermosillo in December is currently the most expensive (average of $836). 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.

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