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Cheap flights from St. Louis to San Francisco from $389

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to San Francisco departing on 1/21. 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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Cheap round-trip flights

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American Airlines Logo
7:27 am - 12:25 pmSTL-STS
6h 58m1 stop
American Airlines Logo
4:23 pm - 11:59 pmSTS-STL
5h 36m1 stop
$389American Airlines
Find Deal
Wed, Jan 21 - Sat, Jan 24
American Airlines Logo
7:27 am - 12:25 pmSTL-STS
6h 58m1 stop
American Airlines Logo
12:55 pm - 10:59 pmSTS-STL
8h 04m2 stops
$394American Airlines
Find Deal
Wed, Jan 21 - Sat, Jan 24
American Airlines Logo
7:15 am - 3:53 pmSTL-STS
10h 38m2 stops
American Airlines Logo
12:55 pm - 10:59 pmSTS-STL
8h 04m2 stops
$405American Airlines
Find Deal
Wed, Jan 21 - Sat, Jan 24
American Airlines Logo
7:15 am - 3:53 pmSTL-STS
10h 38m2 stops
American Airlines Logo
12:55 pm - 10:59 pmSTS-STL
8h 04m2 stops
$410American Airlines
Find Deal
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
6:19 pm - 8:41 pmSTL-STS
28h 22m2 stops
Alaska Airlines Logo
11:03 am - 1:54 pmSTS-STL
24h 51m2 stops
$423Alaska Airlines
Find Deal
Sat, Jan 24 - Wed, Jan 28
Alaska Airlines Logo
6:19 pm - 8:58 amSTL-STS
16h 39m2 stops
Alaska Airlines Logo
11:15 am - 1:54 pmSTS-STL
24h 39m1 stop
$438Alaska Airlines
Find Deal
Sat, Jan 24 - Wed, Jan 28
Alaska Airlines Logo
6:19 pm - 10:35 amSTL-STS
18h 16m1 stop
Alaska Airlines Logo
11:03 am - 1:54 pmSTS-STL
24h 51m2 stops
$443Alaska Airlines
Find Deal
Sat, Jan 24 - Wed, Jan 28
Alaska Airlines Logo
6:19 pm - 10:35 amSTL-STS
18h 16m1 stop
Alaska Airlines Logo
11:15 am - 1:54 pmSTS-STL
24h 39m1 stop
$457Alaska Airlines
Find Deal
Sat, Jan 24 - Wed, Jan 28
American Airlines Logo
11:00 am - 3:53 pmSTL-STS
6h 53m1 stop
American Airlines Logo
4:23 pm - 11:59 pmSTS-STL
5h 36m1 stop
$479American Airlines
Find Deal
Mon, Jan 19 - Thu, Jan 22
American Airlines Logo
11:00 am - 3:53 pmSTL-STS
6h 53m1 stop
American Airlines Logo
12:55 pm - 10:59 pmSTS-STL
8h 04m2 stops
$525American Airlines
Find Deal
Mon, Jan 19 - Thu, Jan 22

American Airlines flights from St. Louis to Santa Rosa

Our best American Airlines deals on St. Louis to Santa Rosa flight tickets
American Airlines
Jan 21
STL7:27 amLambert-St Louis
6h 58m
1 stop
STS12:25 pmSanta Rosa Sonoma County
Jan 24
STS4:23 pmSanta Rosa Sonoma County
5h 36m
1 stop
STL11:59 pmLambert-St Louis
$389
Find similar
American Airlines
Jan 21
STL7:27 amLambert-St Louis
6h 58m
1 stop
STS12:25 pmSanta Rosa Sonoma County
Jan 24
STS12:55 pmSanta Rosa Sonoma County
8h 04m
2 stops
STL10:59 pmLambert-St Louis
$394
Find similar
American Airlines
Jan 21
STL7:15 amLambert-St Louis
10h 38m
2 stops
STS3:53 pmSanta Rosa Sonoma County
Jan 24
STS12:55 pmSanta Rosa Sonoma County
8h 04m
2 stops
STL10:59 pmLambert-St Louis
$405
Find similar

Alaska Airlines flights from St. Louis to Santa Rosa

Our best Alaska Airlines deals on St. Louis to Santa Rosa flight tickets
Alaska Airlines
Jan 24
STL6:19 pmLambert-St Louis
28h 22m
2 stops
STS8:41 pmSanta Rosa Sonoma County
Jan 28
STS11:03 amSanta Rosa Sonoma County
24h 51m
2 stops
STL1:54 pmLambert-St Louis
$423
Find similar
Alaska Airlines
Jan 24
STL6:19 pmLambert-St Louis
16h 39m
2 stops
STS8:58 amSanta Rosa Sonoma County
Jan 28
STS11:15 amSanta Rosa Sonoma County
24h 39m
1 stop
STL1:54 pmLambert-St Louis
$438
Find similar
Alaska Airlines
Jan 24
STL6:19 pmLambert-St Louis
18h 16m
1 stop
STS10:35 amSanta Rosa Sonoma County
Jan 28
STS11:03 amSanta Rosa Sonoma County
24h 51m
2 stops
STL1:54 pmLambert-St Louis
$443
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to Santa Rosa 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 November 29, 2025.
Use the filters below to find and compare flights from St. Louis to Santa Rosa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 1/21

7:27 am-12:25 pm

1 stop6h 58m

Santa Rosa Sonoma County

Sat 1/24

4:23 pm-11:59 pm

1 stop5h 36m

$389

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 1/21

7:27 am-12:25 pm

1 stop6h 58m

Santa Rosa Sonoma County

Sat 1/24

12:55 pm-10:59 pm

2 stops8h 04m

$394

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 1/21

7:15 am-3:53 pm

2 stops10h 38m

Santa Rosa Sonoma County

Sat 1/24

12:55 pm-10:59 pm

2 stops8h 04m

$405

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Wed 1/21

7:15 am-3:53 pm

2 stops10h 38m

Santa Rosa Sonoma County

Sat 1/24

12:55 pm-10:59 pm

2 stops8h 04m

$410

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 1/24

6:19 pm-8:41 pm

2 stops28h 22m

Santa Rosa Sonoma County

Wed 1/28

11:03 am-1:54 pm

2 stops24h 51m

$423

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 1/24

6:19 pm-8:58 am

2 stops16h 39m

Santa Rosa Sonoma County

Wed 1/28

11:15 am-1:54 pm

1 stop24h 39m

$438

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 1/24

6:19 pm-10:35 am

1 stop18h 16m

Santa Rosa Sonoma County

Wed 1/28

11:03 am-1:54 pm

2 stops24h 51m

$443

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Sat 1/24

6:19 pm-10:35 am

1 stop18h 16m

Santa Rosa Sonoma County

Wed 1/28

11:15 am-1:54 pm

1 stop24h 39m

$457

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Mon 1/19

11:00 am-3:53 pm

1 stop6h 53m

Santa Rosa Sonoma County

Thu 1/22

4:23 pm-11:59 pm

1 stop5h 36m

$479

St. LouisSanta Rosa

STL - STS

STLSTS

Lambert-St Louis

Mon 1/19

11:00 am-3:53 pm

1 stop6h 53m

Santa Rosa Sonoma County

Thu 1/22

12:55 pm-10:59 pm

2 stops8h 04m

$525

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to San Francisco from

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

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 typical price of a round-trip flight between St. Louis and Santa Rosa?

What is the cheapest day to depart on your flight to Santa Rosa?

Our data shows that Monday is the least expensive day to fly to Santa Rosa. Tickets to fly out on this day can be as low as $623. On the other hand, Saturday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $677.

When to book flights from St. Louis to Santa Rosa

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

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

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

Fastest flight time

6h 58m

Direct flights

None
The fastest flight from St. Louis to Santa Rosa takes 6h 58m
There are no direct flights from St. Louis to Santa Rosa. There are no popular flight routes from St. Louis to Santa Rosa.
Search flight deals

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

    A flight from Lambert-St Louis to Santa Rosa Sonoma County will travel around 1746.9 mi. By plane, this route typically takes 6h 49m.

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

    Prices for flights from Lambert-St Louis Airport to Santa Rosa Sonoma County Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to Santa Rosa Sonoma County Airport?

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

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Santa Rosa Sonoma County Airport.

  • What documentation or ID do you need to fly to Santa Rosa Sonoma County Airport?

    The travel and health documents you'll need for your trip to Santa Rosa Sonoma County Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Santa Rosa Sonoma County Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to Santa Rosa?

Best airlines flying from St. Louis to Santa Rosa

Compare and see reviews for airlines that fly from St. Louis to Santa Rosa with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $494Free CancellationRating
7.2
11,042 reviews
Search American Airlines flights

Traveling to a place near San Francisco?

Book flights to San Francisco if you plan to visit one of these locations
Fort Bragg
Mendocino
Ukiah
Little River
Point Arena

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Santa Rosa. momondo saves you time and could save you money on your trip.

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

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

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

Once you have performed a search for St. Louis to Santa Rosa flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes momondo offers price alerts on flights to Santa Rosa 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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