What are the cheapest airlines flying from Santa Rosa to St. Louis round-trip?

Alaska Airlines, at $318, was found to be the cheapest airline from Santa Rosa to St. Louis. An alternate airline flying to your destination would be American Airlines. Users have found that Alaska Airlines is 50% cheaper than the other options available to this destination.

What is the cheapest day to fly from Santa Rosa to St. Louis?

Travelers seeking maximum savings on their Santa Rosa to St. Louis flight should consider departing on Friday afternoons when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

What is the cheapest day to fly round-trip from Santa Rosa to St. Louis?

Users have found that leaving on a Thursday can be a cost-effective option. It’s possible to save up to 89% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from Santa Rosa to St. Louis?

Travelers have found it’s best to book a flight 36 days in advance to save up to 154% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 36 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Santa Rosa to St. Louis 1-2 weeks in advance for as low as $352, or $359 for flights within the next 24 hours.

What is the cheapest month to fly from Santa Rosa to St. Louis?

January can be a great time to fly to St. Louis from Santa Rosa with a flight ticket averaging about $397. Cheapflights users have found deals in the month of January for as cheap as $152. The most expensive prices can be found in the month of June.

What is the cheapest time of day to fly from STS to STL?

When flying from Santa Rosa to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 39% versus a flight in the morning.

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

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

How can I find direct flights from Santa Rosa to St. Louis?

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

Can I find deals for business class flights from Santa Rosa to St. Louis?

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

$318+ Flights from Santa Rosa to St. Louis

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Cheap flight deals from Santa Rosa to St. Louis

Round-trip from	$318 (Alaska Airlines)
Popular in	November
Cheapest in	October
Average price	$557

From Santa Rosa Sonoma County to Lambert-St Louis

Search Deals

Highest demand for flights based on searches. 14% potential increase in price ($110 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 7% potential price decrease ($46 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in June 2025

Search Deals

Find flight deals from Santa Rosa to St. Louis

Cheapest flights from Santa Rosa to St. Louis
Explore the most affordable flight options available from Santa Rosa to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

mié. 10/17:00 amSTS - STL

1 stop8h 34mAlaska Airlines

mié. 10/86:33 amSTL - STS

1 stop9h 01mAlaska Airlines

Deal found 6/10

$318

lun. 7/287:00 amSTS - STL

2 stops14h 59mMultiple Airlines

lun. 8/47:32 pmSTL - STS

1 stop19h 53mMultiple Airlines

Deal found 6/11

$549

jue. 6/191:10 pmSTS - STL

1 stop8h 49mAmerican Airlines

dom. 6/225:37 amSTL - STS

1 stop8h 08mAmerican Airlines

Deal found 6/11

$899

Best flights from Santa Rosa to St. Louis
Discover carefully curated flight deals from Santa Rosa to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated junio 12, 2025.

mié. 10/17:00 amSTS - STL

1 stop8h 34mAlaska Airlines

mié. 10/86:33 amSTL - STS

1 stop9h 01mAlaska Airlines

Deal found 6/10

$318

lun. 7/287:00 amSTS - STL

2 stops14h 59mMultiple Airlines

lun. 8/47:32 pmSTL - STS

1 stop19h 53mMultiple Airlines

Deal found 6/11

$549

mar. 7/1512:20 pmSTS - STL

1 stop8h 37mAmerican Airlines

vie. 7/187:44 amSTL - STS

1 stop6h 47mAmerican Airlines

Deal found 6/11

$1,649

Last-minute flights from Santa Rosa to St. Louis
Discover last-minute flight deals from Santa Rosa to St. Louis. Data last updated junio 12, 2025 and is based on user searches.

jue. 6/191:10 pmSTS - STL

1 stop8h 49mAmerican Airlines

dom. 6/225:37 amSTL - STS

1 stop8h 08mAmerican Airlines

Deal found 6/11

$899

sáb. 6/217:12 amSTS - STL

1 stop9h 23mAlaska Airlines

mié. 6/256:41 amSTL - STS

1 stop8h 44mAlaska Airlines

Deal found 6/11

$799

mar. 7/228:01 pmSTS - STL

1 stop20h 34mAlaska Airlines

lun. 7/283:24 pmSTL - STS

1 stop29h 43mAlaska Airlines

Deal found 6/11

$415

lun. 7/287:00 amSTS - STL

2 stops14h 59mMultiple Airlines

lun. 8/47:32 pmSTL - STS

1 stop19h 53mMultiple Airlines

Deal found 6/11

$549

Cheapflights Fare Finder

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

mié. 10/1

7:00 am-5:34 pm

1 stop8h 34m

Lambert-St Louis

mié. 10/8

6:33 am-1:34 pm

1 stop9h 01m

$318

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

mié. 10/1

7:00 am-5:34 pm

1 stop8h 34m

Lambert-St Louis

mié. 10/8

3:57 pm-6:11 pm

2 stops28h 14m

$356

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

lun. 7/28

7:00 am-11:59 pm

2 stops14h 59m

Lambert-St Louis

lun. 8/4

7:32 pm-1:25 pm

1 stop19h 53m

$549

Santa RosaSt. Louis

STS - STL

STSSTL

Santa Rosa Sonoma County

mar. 7/15

12:20 pm-10:57 pm

1 stop8h 37m

Lambert-St Louis

vie. 7/18

7:44 am-12:31 pm

1 stop6h 47m

$1,649

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Best time to book a flight from Santa Rosa to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Santa Rosa 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.

Cheapflights Insights

Everything you need to know about your flight from Santa Rosa to St. Louis

What is the cheapest month to book a flight from Santa Rosa to St. Louis?

Currently, August is the cheapest month in which you can book a flight from Santa Rosa to St. Louis (average of $311). Flying from Santa Rosa to St. Louis in March is currently the most expensive (average of $356). 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.

Rainfall in St. Louis by month

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

If weather is an important factor for your trip to St. Louis, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Read reviews from past customers who have flown Alaska Airlines and American Airlines from Santa Rosa to St. Louis. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

What are the cheapest airlines flying from Santa Rosa to St. Louis round-trip?
Alaska Airlines, at $318, was found to be the cheapest airline from Santa Rosa to St. Louis. An alternate airline flying to your destination would be American Airlines. Users have found that Alaska Airlines is 50% cheaper than the other options available to this destination.
Can I find deals for flights from Santa Rosa to St. Louis that include hotel bookings?
Yes. In addition to deals on Santa Rosa to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Santa Rosa to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Santa Rosa to St. Louis.
Can I find deals for business class flights from Santa Rosa to St. Louis?
Yes. Cheapflights offers flight deals from Santa Rosa to St. Louis 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 Santa Rosa to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Santa Rosa to St. Louis (average of $311). Flying from Santa Rosa to St. Louis in March is currently the most expensive (average of $356). 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.

See more FAQs

O'Fallon

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Eureka

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Festus

Alton

Farmington

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Top 2 airlines flying from Santa Rosa to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$346	Average$614	FlexibilityNo cancel fee	On-time71%
Alaska Airlines	Cheapest$432	Average$708	FlexibilityNo cancel fee	On-time75%

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$318+ Cheap flights from Santa Rosa to St. Louis (STS - STL)

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Santa Rosa to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Santa Rosa to St. Louis

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Santa Rosa to St. Louis

Cheapest flights from Santa Rosa to St. LouisExplore the most affordable flight options available from Santa Rosa to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

Explore the most affordable flight options available from Santa Rosa to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Santa Rosa to St. Louis that are best for you.

Best time to book a flight from Santa Rosa to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Santa Rosa with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Santa Rosa to St. Louis

What is the cheapest month to book a flight from Santa Rosa to St. Louis?

Rainfall in St. Louis by month

Plan your trip to St. Louis by taking into account the average rainfall totals by month.

Temperature in St. Louis by month

Plan your trip to St. Louis by taking into account the average temperature totals by month.

Reviews of airlines servicing St. Louis

Read reviews from past customers who have flown Alaska Airlines and American Airlines from Santa Rosa to St. Louis. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What are the cheapest airlines flying from Santa Rosa to St. Louis round-trip?

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

How can I find direct flights from Santa Rosa to St. Louis?

Can I find deals for business class flights from Santa Rosa to St. Louis?

What is the cheapest month to book a flight from Santa Rosa to St. Louis?

Traveling to a place near Santa Rosa?

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Alternative routes for Santa Rosa to St. Louis

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Santa Rosa to St. Louis

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Travel Smart

Cheapest flights from Santa Rosa to St. Louis
Explore the most affordable flight options available from Santa Rosa to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on junio 12, 2025.