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Cheap flights from St. Louis to Hermosillo from $291

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Hermosillo departing on 2/15. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from St. Louis to Hermosillo

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
2:31 pm - 11:38 am
STL
-
HMO
23h 07m
1 stop
American Airlines Logo
12:18 pm - 11:59 pm
HMO
-
STL
9h 41m
1 stop
$630American Airlines
Mon, Mar 9 - Mon, Mar 16
American Airlines Logo
2:31 pm - 11:38 am
STL
-
HMO
23h 07m
1 stop
American Airlines Logo
12:18 pm - 8:55 am
HMO
-
STL
18h 37m
2 stops
$640American Airlines
Mon, Mar 9 - Mon, Mar 16
American Airlines Logo
11:46 am - 11:38 am
STL
-
HMO
25h 52m
2 stops
American Airlines Logo
12:18 pm - 10:59 am
HMO
-
STL
20h 41m
2 stops
$646American Airlines
Mon, Mar 9 - Mon, Mar 16
Aeromexico Logo
7:10 am - 8:16 am
STL
-
HMO
26h 06m
2 stops
Aeromexico Logo
7:46 pm - 5:42 pm
HMO
-
STL
20h 56m
2 stops
$765Aeromexico
Mon, Feb 23 - Wed, Feb 25
Aeromexico Logo
10:13 am - 8:16 am
STL
-
HMO
23h 03m
2 stops
Aeromexico Logo
5:58 pm - 5:42 pm
HMO
-
STL
22h 44m
2 stops
$770Aeromexico
Mon, Feb 23 - Wed, Feb 25
American Airlines Logo
5:12 am - 12:26 pm
STL
-
HMO
8h 14m
2 stops
American Airlines Logo
1:06 pm - 1:51 pm
HMO
-
STL
23h 45m
1 stop
$823American Airlines
Thu, Feb 26 - Mon, Mar 2
American Airlines Logo
5:12 am - 12:26 pm
STL
-
HMO
8h 14m
2 stops
American Airlines Logo
1:06 pm - 11:01 am
HMO
-
STL
20h 55m
2 stops
$828American Airlines
Thu, Feb 26 - Mon, Mar 2
Aeromexico Logo
7:10 am - 8:16 am
STL
-
HMO
26h 06m
2 stops
Aeromexico Logo
7:46 pm - 11:36 pm
HMO
-
STL
26h 50m
2 stops
$936Aeromexico
Mon, Feb 23 - Wed, Feb 25
American Airlines Logo
2:31 pm - 12:26 pm
STL
-
HMO
22h 55m
1 stop
American Airlines Logo
1:06 pm - 1:51 pm
HMO
-
STL
23h 45m
1 stop
$1,123American Airlines
Thu, Feb 26 - Mon, Mar 2
Multiple Airlines Logo
4:05 pm - 8:29 am
STL
-
HMO
18h 24m
2 stops
Multiple Airlines Logo
7:51 am - 3:29 pm
HMO
-
STL
29h 38m
3 stops
$3,262Multiple Airlines
Mon, Mar 9 - Mon, Mar 16

Aeromexico flights from St. Louis to Hermosillo

Our best Aeromexico deals on St. Louis to Hermosillo flight tickets
Aeromexico
Feb 23
STL10:13 amLambert-St Louis
23h 03m
2 stops
HMO8:16 amHermosillo Gen Pesqueira Garcia
Feb 25
HMO5:58 pmHermosillo Gen Pesqueira Garcia
22h 44m
2 stops
STL5:42 pmLambert-St Louis
$770
Aeromexico
Feb 23
STL7:10 amLambert-St Louis
26h 06m
2 stops
HMO8:16 amHermosillo Gen Pesqueira Garcia
Feb 25
HMO5:58 pmHermosillo Gen Pesqueira Garcia
28h 38m
2 stops
STL11:36 pmLambert-St Louis
$936

American Airlines flights from St. Louis to Hermosillo

Our best American Airlines deals on St. Louis to Hermosillo flight tickets
American Airlines
Mar 9
STL2:31 pmLambert-St Louis
23h 07m
1 stop
HMO11:38 amHermosillo Gen Pesqueira Garcia
Mar 16
HMO12:18 pmHermosillo Gen Pesqueira Garcia
9h 41m
1 stop
STL11:59 pmLambert-St Louis
$630
American Airlines
Mar 9
STL2:31 pmLambert-St Louis
23h 07m
1 stop
HMO11:38 amHermosillo Gen Pesqueira Garcia
Mar 16
HMO12:18 pmHermosillo Gen Pesqueira Garcia
18h 37m
2 stops
STL8:55 amLambert-St Louis
$640
American Airlines
Mar 9
STL11:46 amLambert-St Louis
25h 52m
2 stops
HMO11:38 amHermosillo Gen Pesqueira Garcia
Mar 16
HMO12:18 pmHermosillo Gen Pesqueira Garcia
20h 41m
2 stops
STL10:59 amLambert-St Louis
$646

momondo 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, momondo users made 832,500 searches. Data last updated January 25, 2026.
Use the filters below to find and compare flights from St. Louis to Hermosillo that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Mon 3/9

2:31 pm-11:38 am

1 stop23h 07m

Hermosillo Gen Pesqueira Garcia

Mon 3/16

12:18 pm-11:59 pm

1 stop9h 41m

$630

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Mon 3/9

2:31 pm-11:38 am

1 stop23h 07m

Hermosillo Gen Pesqueira Garcia

Mon 3/16

12:18 pm-8:55 am

2 stops18h 37m

$640

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Mon 3/9

11:46 am-11:38 am

2 stops25h 52m

Hermosillo Gen Pesqueira Garcia

Mon 3/16

12:18 pm-10:59 am

2 stops20h 41m

$646

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Mon 2/23

7:10 am-8:16 am

2 stops26h 06m

Hermosillo Gen Pesqueira Garcia

Wed 2/25

7:46 pm-5:42 pm

2 stops20h 56m

$765

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Mon 2/23

10:13 am-8:16 am

2 stops23h 03m

Hermosillo Gen Pesqueira Garcia

Wed 2/25

5:58 pm-5:42 pm

2 stops22h 44m

$770

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Thu 2/26

5:12 am-12:26 pm

2 stops8h 14m

Hermosillo Gen Pesqueira Garcia

Mon 3/2

1:06 pm-1:51 pm

1 stop23h 45m

$823

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Thu 2/26

5:12 am-12:26 pm

2 stops8h 14m

Hermosillo Gen Pesqueira Garcia

Mon 3/2

1:06 pm-11:01 am

2 stops20h 55m

$828

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Mon 2/23

7:10 am-8:16 am

2 stops26h 06m

Hermosillo Gen Pesqueira Garcia

Wed 2/25

7:46 pm-11:36 pm

2 stops26h 50m

$936

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Thu 2/26

2:31 pm-12:26 pm

1 stop22h 55m

Hermosillo Gen Pesqueira Garcia

Mon 3/2

1:06 pm-1:51 pm

1 stop23h 45m

$1,123

St. LouisHermosillo

STL - HMO

STLHMO

Lambert-St Louis

Mon 3/9

4:05 pm-8:29 am

2 stops18h 24m

Hermosillo Gen Pesqueira Garcia

Mon 3/16

7:51 am-3:29 pm

3 stops29h 38m

$3,262

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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How to get the cheapest flight ticket from St. Louis to Hermosillo

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Lambert-St Louis to Hermosillo Gen Pesqueira Garcia?

American Airlines is the most popular carrier operating from Lambert-St Louis to Hermosillo Gen Pesqueira Garcia

When to book flights from St. Louis to Hermosillo

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Hermosillo according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to Hermosillo (STL to HMO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Hermosillo

Fastest flight time

19h 30m

Direct flights

None
The fastest flight from St. Louis to Hermosillo takes 19h 30m
There are no direct flights from St. Louis to Hermosillo. There are no popular flight routes from St. Louis to Hermosillo.
Search flight deals

  • How far is Lambert-St Louis to Hermosillo Gen Pesqueira Garcia by plane?

    Lambert-St Louis and Hermosillo Gen Pesqueira Garcia are 1356.2 mi apart from one another. Flights usually cover this in 19h 30m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to Hermosillo Gen Pesqueira Garcia Airport?

    Prices for flights from Lambert-St Louis Airport to Hermosillo Gen Pesqueira Garcia Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Lambert-St Louis Airport to Hermosillo Gen Pesqueira Garcia Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Hermosillo Gen Pesqueira Garcia Airport.

  • What documentation or ID do you need to fly to Hermosillo Gen Pesqueira Garcia Airport?

    The necessary travel and health documents for your Hermosillo Gen Pesqueira Garcia Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Traveling to a place near Hermosillo?

Book flights to Hermosillo if you plan to visit one of these locations
San Carlos

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Hermosillo?

It is quick and easy to find St. Louis to Hermosillo flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Hermosillo that suits you.

Can I find flights from St. Louis to Hermosillo with flexible booking policies on momondo?

Yes. All flights to Hermosillo from St. Louis on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from St. Louis to Hermosillo?

Once all potential St. Louis to Hermosillo flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Hermosillo right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Hermosillo from St. Louis. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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