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Cheap flights from Santa Rosa to St. Louis from $394

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Santa Rosa to St. Louis departing on 4/21. 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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Find the cheapest flights from Santa Rosa to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Southwest Logo
6:00 am - 5:55 pm
STS
-
STL
9h 55m
2 stops
Southwest Logo
4:00 pm - 8:30 pm
STL
-
STS
6h 30m
1 stop
$394Southwest
Tue, Apr 21 - Sat, Apr 25
Southwest Logo
6:00 am - 5:40 pm
STS
-
STL
9h 40m
2 stops
Southwest Logo
10:35 am - 8:30 pm
STL
-
STS
11h 55m
2 stops
$405Southwest
Tue, Apr 21 - Sat, Apr 25
Alaska Airlines Logo
6:53 pm - 11:59 pm
STS
-
STL
27h 06m
1 stop
Alaska Airlines Logo
7:00 am - 11:59 pm
STL
-
STS
18h 59m
2 stops
$408Alaska Airlines
Sat, Apr 4 - Tue, Apr 14
Alaska Airlines Logo
6:53 pm - 11:59 pm
STS
-
STL
27h 06m
1 stop
Alaska Airlines Logo
7:00 am - 11:59 pm
STL
-
STS
18h 59m
2 stops
$413Alaska Airlines
Fri, Apr 3 - Tue, Apr 14
Alaska Airlines Logo
6:53 pm - 11:59 pm
STS
-
STL
27h 06m
1 stop
Alaska Airlines Logo
4:20 pm - 6:01 pm
STL
-
STS
27h 41m
1 stop
$415Alaska Airlines
Sat, Apr 4 - Mon, Apr 13
Alaska Airlines Logo
7:30 am - 11:59 pm
STS
-
STL
14h 29m
2 stops
Alaska Airlines Logo
7:00 am - 11:59 pm
STL
-
STS
18h 59m
2 stops
$418Alaska Airlines
Sat, Apr 4 - Tue, Apr 14
Alaska Airlines Logo
6:53 pm - 11:59 pm
STS
-
STL
27h 06m
1 stop
Alaska Airlines Logo
3:50 pm - 6:01 pm
STL
-
STS
28h 11m
1 stop
$420Alaska Airlines
Fri, Apr 3 - Tue, Apr 14
Alaska Airlines Logo
7:30 am - 11:59 pm
STS
-
STL
14h 29m
2 stops
Alaska Airlines Logo
7:00 am - 6:01 pm
STL
-
STS
13h 01m
1 stop
$448Alaska Airlines
Sat, Apr 4 - Mon, Apr 13
Alaska Airlines Logo
6:53 pm - 11:59 pm
STS
-
STL
27h 06m
1 stop
Alaska Airlines Logo
4:20 pm - 6:22 pm
STL
-
STS
28h 02m
2 stops
$468Alaska Airlines
Fri, Apr 3 - Mon, Apr 13
Alaska Airlines Logo
6:53 pm - 11:59 pm
STS
-
STL
27h 06m
1 stop
Alaska Airlines Logo
4:46 pm - 10:57 pm
STL
-
STS
8h 11m
1 stop
$475Alaska Airlines
Tue, Apr 21 - Sat, Apr 25

Alaska Airlines flights from Santa Rosa to St. Louis

Our best Alaska Airlines deals on Santa Rosa to St. Louis flight tickets
Alaska Airlines
Apr 4
STS6:53 pmSanta Rosa Sonoma County
27h 06m
1 stop
STL11:59 pmLambert-St Louis
Apr 14
STL7:00 amLambert-St Louis
18h 59m
2 stops
STS11:59 pmSanta Rosa Sonoma County
$408
Alaska Airlines
Apr 3
STS6:53 pmSanta Rosa Sonoma County
27h 06m
1 stop
STL11:59 pmLambert-St Louis
Apr 14
STL7:00 amLambert-St Louis
18h 59m
2 stops
STS11:59 pmSanta Rosa Sonoma County
$413
Alaska Airlines
Apr 4
STS6:53 pmSanta Rosa Sonoma County
27h 06m
1 stop
STL11:59 pmLambert-St Louis
Apr 13
STL4:20 pmLambert-St Louis
27h 41m
1 stop
STS6:01 pmSanta Rosa Sonoma County
$415

Southwest flights from Santa Rosa to St. Louis

Our best Southwest deals on Santa Rosa to St. Louis flight tickets
Southwest
Apr 21
STS6:00 amSanta Rosa Sonoma County
9h 55m
2 stops
STL5:55 pmLambert-St Louis
Apr 25
STL4:00 pmLambert-St Louis
6h 30m
1 stop
STS8:30 pmSanta Rosa Sonoma County
$394
Southwest
Apr 21
STS6:00 amSanta Rosa Sonoma County
9h 40m
2 stops
STL5:40 pmLambert-St Louis
Apr 25
STL10:35 amLambert-St Louis
11h 55m
2 stops
STS8:30 pmSanta Rosa Sonoma County
$405

momondo Fare Finder

 
Customize your flight search to find flights from Santa Rosa to St. Louis 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 February 10, 2026.
Use the filters below to find and compare flights from Santa Rosa to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Tue 4/21

6:00 am-5:55 pm

2 stops9h 55m

Lambert-St Louis

Sat 4/25

4:00 pm-8:30 pm

1 stop6h 30m

$394

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Tue 4/21

6:00 am-5:40 pm

2 stops9h 40m

Lambert-St Louis

Sat 4/25

10:35 am-8:30 pm

2 stops11h 55m

$405

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Sat 4/4

6:53 pm-11:59 pm

1 stop27h 06m

Lambert-St Louis

Tue 4/14

7:00 am-11:59 pm

2 stops18h 59m

$408

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Fri 4/3

6:53 pm-11:59 pm

1 stop27h 06m

Lambert-St Louis

Tue 4/14

7:00 am-11:59 pm

2 stops18h 59m

$413

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Sat 4/4

6:53 pm-11:59 pm

1 stop27h 06m

Lambert-St Louis

Mon 4/13

4:20 pm-6:01 pm

1 stop27h 41m

$415

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Sat 4/4

7:30 am-11:59 pm

2 stops14h 29m

Lambert-St Louis

Tue 4/14

7:00 am-11:59 pm

2 stops18h 59m

$418

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Fri 4/3

6:53 pm-11:59 pm

1 stop27h 06m

Lambert-St Louis

Tue 4/14

3:50 pm-6:01 pm

1 stop28h 11m

$420

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Sat 4/4

7:30 am-11:59 pm

2 stops14h 29m

Lambert-St Louis

Mon 4/13

7:00 am-6:01 pm

1 stop13h 01m

$448

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Fri 4/3

6:53 pm-11:59 pm

1 stop27h 06m

Lambert-St Louis

Mon 4/13

4:20 pm-6:22 pm

2 stops28h 02m

$468

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

Tue 4/21

6:53 pm-11:59 pm

1 stop27h 06m

Lambert-St Louis

Sat 4/25

4:46 pm-10:57 pm

1 stop8h 11m

$475

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to St. Louis from

How to get the cheapest flight ticket from Santa Rosa to St. Louis

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 day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Tuesday when prices can be found for as low as $428. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $533. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from Santa Rosa at noon is the least expensive time of day to depart. momondo users have found prices as low as $386 when looking at flights departing at noon. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $521 per ticket.

When to book flights from Santa Rosa to St. Louis

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

Cheap Santa Rosa to St. Louis (STS to STL) flight deals and tips

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

Fastest flight time

7h 13m

Direct flights

None
The fastest flight from Santa Rosa to St. Louis takes 7h 13m
There are no direct flights from Santa Rosa to St. Louis. There are no popular flight routes from Santa Rosa to St. Louis.
Search flight deals

  • How far is Santa Rosa Sonoma County to Lambert-St Louis by plane?

    The straight-line distance from Santa Rosa Sonoma County to Lambert-St Louis is 1746.9 mi. A reasonable flight in good conditions will take 7h 13m.

  • When did momondo last update prices for flights from Santa Rosa Sonoma County Airport to Lambert-St Louis Airport?

    Prices for flights from Santa Rosa Sonoma County Airport to Lambert-St Louis Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Santa Rosa Sonoma County Airport to Lambert-St Louis 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 Santa Rosa Sonoma County Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents required for your trip to Lambert-St Louis Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Lambert-St Louis Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
Shrewsbury

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Santa Rosa to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. momondo enables you to select and highlight flights to St. Louis from Santa Rosa with this policy.

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

momondo helps you find the best flight between Santa Rosa and St. Louis by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

Price alerts on flights to St. Louis from Santa Rosa are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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