How long is the flight from St. Louis to San Jose, California?

For as low as $183, Frontier can have you in San Jose, California from St. Louis in 7h 07m. Airlines will cover a distance of 1710 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines flying from St. Louis to San Jose, California round-trip?

According to our current data, American Airlines ($246), Southwest ($256), and Delta ($256) offers the cheapest pricing from St. Louis to San Jose, California. Users have found that American Airlines is 35% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from St. Louis to San Jose, California one-way?

For one-way options, check prices for Delta. According to our data, you can fly for as low as $128. Users have also found prices from $148 and $153 on Southwest and American Airlines, respectively.

In terms of precipitation, rainfall in San Jose, California ranges from 0.0 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. July is typically the driest time to visit San Jose, California when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Jose, California, 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 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).

What are the most popular airlines that fly from St. Louis to San Jose, California?

The most popular airlines flying from St. Louis to San Jose, California are Southwest, Delta and United Airlines. Something to consider prior to booking your flight.

Most accurate provider : When it comes to deals on St. Louis-San Jose, California flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-San Jose, California flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-San Jose, California flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-San Jose, California flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-San Jose, California flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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

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

How can I find direct flights from St. Louis to San Jose?

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

Can I find deals for business class flights from St. Louis to San Jose?

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

$91+ Flights from St. Louis to San Jose, CA

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

Find cheap flights from St. Louis to San Jose with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from St. Louis to San Jose

Cheapest flights from St. Louis to San Jose
Explore the most affordable flight options available from St. Louis to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 27, 2025.

Wed 12/315:26 pmSTL - SJC

1 stop8h 33mAlaska Airlines

Wed 1/712:46 pmSJC - STL

2 stops23h 08mAlaska Airlines

Deal found 12/26

$988

Tue 12/305:02 pmSTL - SJC

1 stop7h 32mUnited Airlines

Fri 1/22:29 pmSJC - STL

1 stop5h 53mUnited Airlines

Deal found 12/25

$1,006

Tue 12/307:00 amSTL - SJC

1 stop8h 11mAmerican Airlines

Tue 1/66:00 amSJC - STL

2 stops8h 14mAmerican Airlines

Deal found 12/25

$1,011

Tue 12/309:50 amSTL - SJC

2 stops7h 45mSouthwest

Fri 1/23:35 pmSJC - STL

2 stops7h 25mSouthwest

Deal found 12/25

$1,016

Sat 12/277:20 amSTL - SJC

1 stop7h 21mDelta

Wed 12/311:45 pmSJC - STL

1 stop5h 49mDelta

Deal found 12/26

$1,107

Sat 12/272:42 pmSTL - SJC

1 stop6h 05mAmerican Airlines

Wed 12/316:10 amSJC - STL

2 stops11h 12mAmerican Airlines

Deal found 12/25

$1,112

Tue 12/309:50 amSTL - SJC

2 stops7h 45mSouthwest

Wed 12/318:45 amSJC - STL

2 stops6h 40mSouthwest

Deal found 12/26

$1,117

Tue 12/307:00 amSTL - SJC

2 stops16h 16mUnited Airlines

Tue 1/68:40 amSJC - STL

3 stops11h 20mUnited Airlines

Deal found 12/25

$1,182

Best flights from St. Louis to San Jose
Discover carefully curated flight deals from St. Louis to San Jose that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 27, 2025.

Mon 1/121:07 pmSTL - SJC

1 stop7h 07mFrontier

Thu 1/1511:14 amSJC - STL

1 stop23h 26mFrontier

Deal found 12/25

$183

Sat 3/215:30 pmSTL - SJC

1 stop17h 58mAlaska Airlines

Mon 3/232:29 pmSJC - STL

1 stop22h 22mAlaska Airlines

Deal found 12/25

$322

Thu 2/126:35 amSTL - SJC

2 stops13h 03mDelta

Tue 2/176:25 pmSJC - STL

2 stops13h 07mDelta

Deal found 12/25

$355

Thu 2/1210:11 pmSTL - SJC

1 stop11h 44mMultiple Airlines

Tue 2/177:40 amSJC - STL

2 stops9h 45mMultiple Airlines

Deal found 12/25

$355

Sat 3/217:30 pmSTL - SJC

1 stop6h 00mSouthwest

Sat 3/286:15 pmSJC - STL

1 stop5h 40mSouthwest

Deal found 12/25

$370

Mon 1/121:07 pmSTL - SJC

1 stop7h 07mFrontier

Fri 1/239:35 amSJC - STL

1 stop9h 13mFrontier

Deal found 12/26

$282

Sat 1/246:19 pmSTL - SJC

1 stop17h 29mAlaska Airlines

Tue 1/2711:00 amSJC - STL

1 stop24h 54mAlaska Airlines

Deal found 12/24

$322

Fri 3/204:20 pmSTL - SJC

1 stop19h 08mAlaska Airlines

Mon 3/307:05 pmSJC - STL

1 stop26h 54mAlaska Airlines

Deal found 12/25

$332

Sat 3/217:30 pmSTL - SJC

1 stop6h 00mSouthwest

Wed 3/2511:10 amSJC - STL

2 stops8h 05mSouthwest

Deal found 12/25

$376

Sat 3/215:30 pmSTL - SJC

1 stop17h 58mAlaska Airlines

Wed 3/258:00 amSJC - STL

1 stop29h 20mAlaska Airlines

Deal found 12/25

$332

Thu 2/122:47 pmSTL - SJC

1 stop10h 12mAlaska Airlines

Tue 2/176:03 pmSJC - STL

1 stop17h 48mAlaska Airlines

Deal found 12/25

$380

Last-minute flights from St. Louis to San Jose
Discover last-minute flight deals from St. Louis to San Jose. Data last updated December 27, 2025 and is based on user searches.

Fri 1/97:43 amSTL - SJC

2 stops14h 21mMultiple Airlines

Sun 1/1111:27 amSJC - STL

1 stop22h 45mMultiple Airlines

Deal found 12/25

$496

Mon 1/121:07 pmSTL - SJC

1 stop7h 07mFrontier

Thu 1/1511:14 amSJC - STL

1 stop23h 26mFrontier

Deal found 12/25

$183

Mon 1/121:07 pmSTL - SJC

1 stop7h 07mFrontier

Fri 1/239:35 amSJC - STL

1 stop9h 13mFrontier

Deal found 12/26

$282

Mon 1/125:00 pmSTL - SJC

1 stop7h 55mDelta

Fri 1/237:45 amSJC - STL

2 stops11h 53mDelta

Deal found 12/26

$446

Mon 1/125:00 pmSTL - SJC

1 stop7h 55mDelta

Thu 1/157:45 amSJC - STL

2 stops11h 50mDelta

Deal found 12/25

$467

Tue 1/132:50 pmSTL - SJC

1 stop20h 58mAlaska Airlines

Thu 1/223:36 pmSJC - STL

1 stop20h 18mAlaska Airlines

Deal found 12/26

$480

Tue 1/1310:15 amSTL - SJC

2 stops7h 40mSouthwest

Thu 1/2210:25 amSJC - STL

2 stops8h 10mSouthwest

Deal found 12/26

$499

Fri 1/165:40 pmSTL - SJC

1 stop6h 15mSouthwest

Mon 1/196:30 amSJC - STL

1 stop7h 25mSouthwest

Deal found 12/26

$399

Fri 1/163:37 pmSTL - SJC

2 stops9h 12mAmerican Airlines

Mon 1/196:00 amSJC - STL

1 stop8h 14mAmerican Airlines

Deal found 12/26

$421

Sat 1/174:15 pmSTL - SJC

1 stop6h 41mUnited Airlines

Sun 1/188:40 amSJC - STL

1 stop6h 15mUnited Airlines

Deal found 12/26

$450

Thu 1/2210:01 pmSTL - SJC

1 stop12h 39mFrontier

Thu 1/2912:34 pmSJC - STL

1 stop6h 32mFrontier

Deal found 12/25

$234

Sat 1/246:19 pmSTL - SJC

1 stop17h 29mAlaska Airlines

Tue 1/2711:00 amSJC - STL

1 stop24h 54mAlaska Airlines

Deal found 12/24

$322

One-way flights from St. Louis to San Jose
Search for one-way flight options from St. Louis to San Jose. Find affordable one-way fares based on user searches. Data last updated December 27, 2025.

Mon 1/121:07 pmSTL - SJC

1 stop7h 07mFrontier

Deal found 12/26

$91

Mon 3/912:14 pmSTL - SJC

1 stop7h 53mFrontier

Deal found 12/25

$111

Sat 1/313:46 pmSTL - SJC

2 stops22h 23mFrontier

Deal found 12/25

$116

Thu 3/510:11 pmSTL - SJC

1 stop21h 56mFrontier

Deal found 12/25

$117

Thu 1/2910:01 pmSTL - SJC

1 stop12h 39mFrontier

Deal found 12/26

$119

Sun 1/119:46 pmSTL - SJC

1 stop22h 28mFrontier

Deal found 12/26

$133

Fri 3/62:22 pmSTL - SJC

2 stops9h 43mDelta

Deal found 12/25

$137

Thu 1/151:35 pmSTL - SJC

1 stop7h 02mFrontier

Deal found 12/25

$141

Thu 1/2210:01 pmSTL - SJC

1 stop12h 39mFrontier

Deal found 12/26

$149

Sat 1/316:19 pmSTL - SJC

1 stop17h 29mHawaiian Airlines

Deal found 12/25

$157

Thu 3/191:00 pmSTL - SJC

1 stop7h 07mFrontier

Deal found 12/26

$160

Fri 3/612:14 pmSTL - SJC

1 stop7h 53mFrontier

Deal found 12/26

$161

Find flight deals from St. Louis to San Jose

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$183 (CheapOair)
One-way from	$91 (Cheapflightsfares)
Popular in	September
Cheapest in	February
Average price	$389

Provider with most accurate pricing for Lambert-St Louis-San Jose flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-San Jose flights.

Search Deals

From Lambert-St Louis to San Jose

Search Deals

One-way flight from Lambert-St Louis to San Jose

Search Deals

Highest demand for flights based on searches. 10% potential increase in price ($43 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Mon 1/12

1:07 pm-6:14 pm

1 stop7h 07m

San Jose

Thu 1/15

11:14 am-12:40 pm

1 stop23h 26m

$183

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Mon 1/12

1:07 pm-6:14 pm

1 stop7h 07m

San Jose

Fri 1/23

9:35 am-8:48 pm

1 stop9h 13m

$282

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Sat 3/21

5:30 pm-9:28 am

1 stop17h 58m

San Jose

Mon 3/23

2:29 pm-2:51 pm

1 stop22h 22m

$322

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Sat 1/24

6:19 pm-9:48 am

1 stop17h 29m

San Jose

Tue 1/27

11:00 am-1:54 pm

1 stop24h 54m

$322

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Fri 3/20

4:20 pm-9:28 am

1 stop19h 08m

San Jose

Mon 3/30

7:05 pm-11:59 pm

1 stop26h 54m

$332

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Sat 3/21

5:30 pm-9:28 am

1 stop17h 58m

San Jose

Wed 3/25

8:00 am-3:20 pm

1 stop29h 20m

$332

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Thu 2/12

6:35 am-5:38 pm

2 stops13h 03m

San Jose

Tue 2/17

6:25 pm-9:32 am

2 stops13h 07m

$355

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Thu 2/12

10:11 pm-7:55 am

1 stop11h 44m

San Jose

Tue 2/17

7:40 am-7:25 pm

2 stops9h 45m

$355

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Sat 3/21

7:30 pm-11:30 pm

1 stop6h 00m

San Jose

Sat 3/28

6:15 pm-1:55 am

1 stop5h 40m

$370

St. LouisSan Jose

STL - SJC

STLSJC

Lambert-St Louis

Sat 3/21

7:30 pm-11:30 pm

1 stop6h 00m

San Jose

Wed 3/25

11:10 am-9:15 pm

2 stops8h 05m

$376

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/25

Showing 1-10 of 21 results

Compare providers for flights from St. Louis to San Jose

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to San Jose in December.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-San Jose, California flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on St. Louis-San Jose, California flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from St. Louis-San Jose, California flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-San Jose, California flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-San Jose, California flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to San Jose

Have a flexible travel schedule? Discover the best time to fly to San Jose 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to San Jose

How far ahead should I book a flight from St. Louis to San Jose, California?

The best time to book flights from St. Louis to San Jose, California is 56 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to San Jose, California?

Currently, August is the cheapest month in which you can book a flight from St. Louis to San Jose, California (average of $124). Flying from St. Louis to San Jose, California in May is currently the most expensive (average of $256). 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.

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

When flying from St. Louis to San Jose, California, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 81% versus a flight at noon.

Reviews of airlines servicing San Jose

See what other customers who have flown with Southwest, Delta, and United Airlines from St. Louis to San Jose have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,258 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,258 reviews

Southwest

8.0

Very good

4,258 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

7.9

Good

8,018 reviews

Southwest

8.0

Very good

4,258 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

9,116 reviews

Southwest

8.0

Very good

4,258 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

11,068 reviews

Southwest

8.0

Very good

4,258 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

How long is the flight from St. Louis to San Jose, California?
For as low as $183, Frontier can have you in San Jose, California from St. Louis in 7h 07m. Airlines will cover a distance of 1710 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines flying from St. Louis to San Jose, California round-trip?
According to our current data, American Airlines ($246), Southwest ($256), and Delta ($256) offers the cheapest pricing from St. Louis to San Jose, California. Users have found that American Airlines is 35% cheaper than the other options available to this destination.
What are the cheapest airlines to fly from St. Louis to San Jose, California one-way?
For one-way options, check prices for Delta. According to our data, you can fly for as low as $128. Users have also found prices from $148 and $153 on Southwest and American Airlines, respectively.
Can I find deals for flights from St. Louis to San Jose that include hotel bookings?
Yes. In addition to deals on St. Louis to San Jose flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to San Jose?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to San Jose.
Can I find deals for business class flights from St. Louis to San Jose?
Yes. Cheapflights offers flight deals from St. Louis to San Jose 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 San Jose, California?
Currently, August is the cheapest month in which you can book a flight from St. Louis to San Jose, California (average of $124). Flying from St. Louis to San Jose, California in May is currently the most expensive (average of $256). 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

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from St. Louis to San Jose

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$246	Average$346	FlexibilityNo cancel fee	On-time71%
Southwest	Cheapest$256	Average$411	FlexibilityNo cancel fee	On-time63%
Delta	Cheapest$256	Average$341	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$288	Average$368	FlexibilityNo cancel fee	On-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$91+ Cheap flights from St. Louis to San Jose, CA (STL - SJC)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/12. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to San Jose with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from St. Louis to San Jose

Cheapest flights from St. Louis to San JoseExplore the most affordable flight options available from St. Louis to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 27, 2025.

Explore the most affordable flight options available from St. Louis to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 27, 2025.

Find flight deals from St. Louis to San Jose

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

Compare providers for flights from St. Louis to San Jose

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to San Jose in December.

Best time to book a flight from St. Louis to San Jose

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

Cheapflights Insights

Everything you need to know about your flight from St. Louis to San Jose

How far ahead should I book a flight from St. Louis to San Jose, California?

What is the cheapest month to book a flight from St. Louis to San Jose, California?

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

Reviews of airlines servicing San Jose

See what other customers who have flown with Southwest, Delta, and United Airlines from St. Louis to San Jose have to say. 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 St. Louis to San Jose. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from St. Louis to San Jose, California?

What are the cheapest airlines flying from St. Louis to San Jose, California round-trip?

What are the cheapest airlines to fly from St. Louis to San Jose, California one-way?

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

How can I find direct flights from St. Louis to San Jose?

Can I find deals for business class flights from St. Louis to San Jose?

What is the cheapest month to book a flight from St. Louis to San Jose, California?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to San Jose

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

Top 4 airlines flying from St. Louis to San Jose

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from St. Louis to San Jose
Explore the most affordable flight options available from St. Louis to San Jose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 27, 2025.