STL - SJC

$115 Find Cheap Flights from St. Louis to San Jose

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to San Jose departing on 5/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to San Jose

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Jose, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Jose, as well as popular online travel agencies
Travelers love KAYAK
41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$299
Overall average: $378
Frontier, Alaska Airlines
Fri 4/3Wed 4/8
STL - SJC • 1 stop
Cheapest one-way
$115
Typical prices: $153-$256
Frontier
Thu 5/7
STL - SJC • 1 stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
Avoid peak hours at STL to reduce security wait.
SJC offers quick access to Silicon Valley tech hubs.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $312 (round-trip)
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and San Jose. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $279 (round-trip)
Shortest trip • 6h 05m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 30% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 19% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to San Jose!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from St. Louis to San Jose (STL-SJC)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to San Jose that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to San Jose

Fri, Apr 3 - Wed, Apr 8
Multiple Airlines Logo
12:22 pm - 7:37 pm
STL
-
SJC
9h 15m
1 stop
Multiple Airlines Logo
8:00 am - 11:59 pm
SJC
-
STL
13h 59m
1 stop
$299Multiple Airlines
Wed, Apr 15 - Sat, Apr 25
Southwest Logo
1:45 pm - 6:15 pm
STL
-
SJC
6h 30m
1 stop
Southwest Logo
11:50 am - 8:20 pm
SJC
-
STL
6h 30m
1 stop
$312Southwest
Wed, Apr 29 - Wed, May 6
Southwest Logo
1:45 pm - 6:15 pm
STL
-
SJC
6h 30m
1 stop
Southwest Logo
6:45 am - 5:55 pm
SJC
-
STL
9h 10m
2 stops
$318Southwest
Wed, Apr 15 - Sat, Apr 25
American Airlines Logo
5:20 am - 10:10 am
STL
-
SJC
6h 50m
1 stop
American Airlines Logo
6:10 am - 5:21 pm
SJC
-
STL
9h 11m
2 stops
$322American Airlines
Wed, Apr 29 - Wed, May 6
Southwest Logo
5:30 am - 11:30 am
STL
-
SJC
8h 00m
2 stops
Southwest Logo
11:25 am - 9:45 pm
SJC
-
STL
8h 20m
2 stops
$327Southwest
Fri, Apr 3 - Wed, Apr 8
Multiple Airlines Logo
12:22 pm - 7:37 pm
STL
-
SJC
9h 15m
1 stop
Multiple Airlines Logo
7:30 am - 11:59 pm
SJC
-
STL
14h 29m
2 stops
$338Multiple Airlines
Wed, Apr 22 - Mon, Apr 27
Alaska Airlines Logo
7:00 am - 7:46 pm
STL
-
SJC
14h 46m
1 stop
Alaska Airlines Logo
9:42 pm - 3:50 pm
SJC
-
STL
16h 08m
1 stop
$343Alaska Airlines
Sat, May 16 - Wed, May 20
Alaska Airlines Logo
5:33 pm - 10:59 pm
STL
-
SJC
7h 26m
1 stop
Alaska Airlines Logo
7:06 am - 11:54 pm
SJC
-
STL
14h 48m
2 stops
$355Alaska Airlines
Wed, Apr 15 - Mon, Apr 20
Delta Logo
6:45 pm - 11:42 pm
STL
-
SJC
6h 57m
1 stop
Delta Logo
11:00 pm - 8:30 am
SJC
-
STL
7h 30m
1 stop
$358Delta
Wed, Jun 3 - Wed, Jun 10
Frontier Logo
6:51 pm - 1:17 pm
STL
-
SJC
20h 26m
1 stop
Frontier Logo
5:57 pm - 5:45 pm
SJC
-
STL
21h 48m
1 stop
$366Frontier
Booking Insights

KAYAK's insights & trends for St. Louis to San Jose flights

Get data-powered insights and trends into flights from St. Louis to San Jose to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from St. Louis to San Jose?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to San Jose, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to San Jose is May, where tickets cost $346 (return) on average. On the other hand, the most expensive months are February and August, where the average cost of round-trip tickets is $793 and $482 respectively.

How far in advance should I book a flight from St. Louis to San Jose?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to San Jose, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to San Jose, you should book around 4 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Expert advice

Expert advice for your flight from St. Louis to San Jose

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Bill Fink

Bill Fink

Expert on SJC

Bill is an award-winning travel writer with extensive credits covering airlines and the aviation industry for publications including AARP, AFAR, The Points Guy and Yahoo. Based in Portland, Oregon, Bill has traveled to more than 75 countries - and been late for his flight in most of them. He once achieved top-level frequent flier status for all of American, Delta and United Airlines during a single year.

Good to know

Low seasonFebruary
Cheapest flight$115
Best time to beat the crowds but there is an average 84% increase in price.
Most popular time to fly and prices are also 10% lower on average.
Flight from St. Louis to San Jose

When to book flights from St. Louis to San Jose

Are your dates flexible? Find out the best times to travel from St. Louis to San Jose based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to San Jose

  • What is the cheapest flight from St. Louis to San Jose?

    In the last 3 days, the lowest price for a flight from St. Louis to San Jose was $115 for a one-way ticket and $299 for a round-trip.

  • Do I need a passport to fly between St. Louis and San Jose?

    No

  • Which aircraft models fly most regularly from St. Louis to San Jose?

    The Boeing 737-700 Passenger/BBJ1 (winglets) is the aircraft model that flies most regularly on the St. Louis to San Jose flight route.

  • Which airline alliances offer flights from St. Louis to San Jose?

    oneworld, Star Alliance, and SkyTeam are the airline alliances operating flights between St. Louis and San Jose, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to San Jose, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from St. Louis to San Jose are Southwest and Delta. With an average price for the route of $416 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $346 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from St. Louis to San Jose?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to San Jose.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to San Jose?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Jose from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to San Jose?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Jose with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SJC can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to San Jose?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Jose from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from St. Louis to San Jose

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to San Jose. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to San Jose? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
SouthwestOverall score based on 4320 reviews
8.0Comfort
7.5Entertainment
7.0Food
8.1Boarding
8.6Crew
Airline reviews

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

8.0 ExcellentTobin, Mar 2026
SJC - BUR
Read more Southwest reviews

The problem with the seat assignments is that there were a lot of rows in the front that were empty but my row at the back was full. Just not so pleasant.

No food or entertainment, just a quick 40 minute flight. A little bumpy due to Santa Ana winds but pilot has no control over that. Good flight and landing!

Good but I prefer choose your own seat. With the new assigned seats they should board from the back I see no advantage to this new boarding. Just like every other airline

Snacks are always pretzels. Why can't you also offer peanuts ?

Mediocre. Boarding is now unpleasant. The employees, once friendly and nice, are now regularly speaking sternly to passengers, badgering them to do things right so they can take off on time and gate check bags because they don't have enough overhead bin space. The pretzel snack was crushed flat and broken into even smaller pieces, which happens frequently lately. Drink service was suspended before they reached my row.

The charges were ridiculous for an hour flight and the turbulence was very scary.

Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.

3 hour delay. Had to change plans and was still delayed.

The flight crew was extremely rude and especially not helpful when our flight was delayed.

The boarding and seat assignment system no longer works for me, but I know it is being replaced. Otherwise, I am good with the overall experience.

Left a few minutes early. Got in 15 minutes early. Very attentive service on board. Very organized boarding.

There’s not much to say about a one hour flight. This is a connection from LA to RNO that I missed the previous night due to a mechanical check delay on my originating flight from JFK to LAX. The short flight itself was fine. Instructions from the pilot and crew were per usual. The coffee was barely lukewarm, which possibly was purposeful so we would down it quickly. Bags were already on carousel upon reaching baggage claim, which was excellent.

Delta continues to set the benchmark for traveler-friendly service with minimal disruption and clear communication within the mainland US (coast to coast). I am consistently pleased to be a Delta customer, and this experience once again met my expectations. There was a brief delay departing from MIA due to a technical issue that required the aircraft to return to the gate. However, the situation was handled professionally and transparently. Fortunately, my planned layover allowed ample buffer time, so the adjustment caused no stress. Overall, another smooth and reassuring experience.

Awesome! On time flight, early arrival, and a complimentary upgrade!

Was forced to check in my small carry on, even though I informed the crew it has very fragile items inside

They double booked seats, the gate staff changed my ticket as I was boarding she went over to the computer and changed it without telling me. She messed up an entire three row section for me and others. Other travelers were outraged but the gate staff were so rude, so condescending saying it wasn't their problem to solve. I would rate this a zero if I could. Will not fly Delta again I'll stick with United and American.

I usually get upgraded so my experience is usually amazing. I did not get upgraded this time - which was fine - but the wifi had issues, the monitors were going in & out, & (though not Delta's fault) one of the gentlemen next to me desperately needed a shower.

I really liked the legroom. I am 6’4”.a at For some reason our seats were not together and using the app to fix it didn’t work. Passengers were nice enough to move for us but you should absolutely ensure a parent sits with their child.

Staff were friendly and happy. Delta could make sure passengers that don't have the app know of changes. Without Kayak I would not have known about the change of gate or the delay. Kayak was faster to notify me.

They changed planes and the new plane couldn’t carry enough fuel to fly across the country so we had to stop in Kansas City to refuel. Flight was delayed .

Flight delayed for more than 16 hrs and no effort was spent to provide an alternate

Overall we had a good experience during our flight from San Francisco to Houston.

it was a very short flight so my expectations were low.

Very disappointing given gate agent behavior. Filed a formal complaint with United.

Flight delayed. WiFi connectivity very poor if not existant. Last minute arrival forced me to run to catch my connection.

The power at the seat didn't work and the seat itself was difficult to adjust - this was a business class seat. Flight attendant gave me miles to compensate. The attendant was very professional and on top of his game the entire flight.

the whole trip was smooth, and as comfortable as flying is these days. flight crew was friendly and very courteous and helpful.

HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.

First class ticket gets you a choice of chips or nuts. . Just like economy Southwest. Also no screen in the seats. This is first class???!

Flight arrived 30 min early and bag was waiting at the baggage pickup. United Club HNL was one of the nicest in the system

Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.

Smooth flight. From the early boarding and all were on board before departure time and arrived early in ONT. Great crew. Thank you!!!!

The flight was significantly delayed for 6.5 hours because of snow. There was no communication once the plane returned to the gate regarding when the flight would resume. Other flights were departing while our flight was being unloaded for reasons unknown. Our flight also seemed out of the queue regarding further deicing, refueling, and waiting to Taxi to the runway.

They are always late and seats was also not having working charger

did not have enough meal for first class passengers so offer us snack

Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.

No enough space plus only allowing one laggage instead of two like other airlines.

Qatar airways ,boarding arrangements at Hamid international airport could been better

Amazing I love American. I’ll never fly anyone else if I can help it.

Everything about the flight was lovely. My only suggestion would be to offer a few more options of tv series from Apple TV or HBO.

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

Information on your arrival and departure airports