STL - SFO

$89 Find Cheap Flights from St. Louis to San Francisco

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 Francisco departing on 5/29. 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.
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KAYAK searches hundreds of travel sites at once for deals on flights to San Francisco

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Francisco, 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 Francisco, as well as popular online travel agencies
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Flights Deals

Cheap Flight Deals from St. Louis to San Francisco (STL-SFO)

 
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 Francisco 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.

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from St. Louis to San Francisco.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
5:45 pm - 10:28 amSTL-SFO
18h 43m1 stop
Frontier Logo
8:45 pm - 11:52 pmSFO-STL
25h 07m1 stop
$188Frontier
Find Deal
Wed, May 21 - Sat, May 24
Frontier Logo
5:45 pm - 1:15 pmSTL-SFO
21h 30m1 stop
Frontier Logo
9:59 pm - 12:06 amSFO-STL
24h 07m1 stop
$191Frontier
Find Deal
Sat, May 10 - Sat, May 17
Delta Logo
6:00 am - 3:55 pmSTL-SFO
11h 55m2 stops
Delta Logo
8:55 pm - 8:39 amSFO-STL
9h 44m2 stops
$306Delta
Find Deal
Tue, Jun 3 - Tue, Jun 10
Delta Logo
6:00 am - 3:55 pmSTL-SFO
11h 55m2 stops
Delta Logo
8:55 pm - 8:39 amSFO-STL
9h 44m2 stops
$316Delta
Find Deal
Tue, Jun 3 - Fri, Jun 13
United Airlines Logo
7:00 am - 9:30 amSTL-SFO
4h 30mnonstop
United Airlines Logo
11:55 am - 6:00 pmSFO-STL
4h 05mnonstop
$319United Airlines
Find Deal
Wed, May 21 - Sat, May 24
United Airlines Logo
6:30 am - 8:46 amSTL-SFO
4h 16mnonstop
United Airlines Logo
10:40 am - 4:45 pmSFO-STL
4h 05mnonstop
$323United Airlines
Find Deal
Wed, Jul 2 - Tue, Jul 8
Southwest Logo
12:15 pm - 7:35 pmSTL-SFO
9h 20m1 stop
Southwest Logo
6:35 am - 6:25 pmSFO-STL
9h 50m2 stops
$348Southwest
Find Deal
Tue, Jul 15 - Tue, Jul 22
Southwest Logo
2:20 pm - 9:45 pmSTL-SFO
9h 25m2 stops
Southwest Logo
5:10 am - 1:00 pmSFO-STL
5h 50m1 stop
$354Southwest
Find Deal
Wed, Jun 4 - Wed, Jun 11
American Airlines Logo
6:52 am - 12:32 pmSTL-SFO
7h 40m1 stop
American Airlines Logo
12:24 am - 8:59 amSFO-STL
6h 35m1 stop
$365American Airlines
Find Deal
Tue, May 20 - Sun, May 25
American Airlines Logo
5:19 am - 11:23 amSTL-SFO
8h 04m1 stop
American Airlines Logo
12:24 am - 9:54 amSFO-STL
7h 30m1 stop
$494American Airlines
Find Deal
Sun, May 18 - Thu, May 22
Expert advice

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

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
STL

Avoid peak hours at STL to minimize wait times. Early mornings and afternoons can be crowded, so plan accordingly for a smoother departure.

Read more about STLby Yulia Denisyuk
SFO

For easy city access, take BART from SFO. It's affordable and connects to popular areas like the Mission and Embarcadero.

Read more about SFOby Blane Bachelor
Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

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.

Read more
Blane Bachelor

Blane Bachelor

Expert on SFO

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
Useful Info

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

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

What’s the cheapest day of the week to fly from St. Louis to San Francisco?

The average price of all round-trip flights from St. Louis to San Francisco clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to San Francisco on a Thursday and more expensive on a Sunday. On your return trip to St. Louis, you should consider flying back on a Wednesday, and avoid Sundays for better deals.

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

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 Francisco, 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 Francisco is August, where tickets cost $315 (return) on average. On the other hand, the most expensive months are June and March, where the average cost of round-trip tickets is $428 and $424 respectively.

Can I save money by flying with a layover from St. Louis to San Francisco?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $1,022 on average.

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

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 Francisco, 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 Francisco, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low seasonJanuary
High seasonMay
Cheapest flight$89
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 1% lower on average.
Flight from St. Louis to San Francisco

When to book flights from St. Louis to San Francisco

Are your dates flexible? Find out the best times to travel from St. Louis to San Francisco 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 Francisco

  • Where can I sleep at San Francisco International Airport (SFO)?

    FreshenUp in the International Terminal provides three nap rooms that passengers can rent by the hour. FreshenUp is landside on level G, next to the airport travel agency. The nap rooms have a bed, desk, mirror, and free Wi-Fi. Showers are also provided but at an additional cost. Grand Hyatt at SFO is a hotel within SFO grounds that offers days rooms and overnight stays. It is connected to the airport via the AirTrain.

  • Does San Francisco International Airport offer family services?

    Nursing rooms have been provided for those traveling with infants at SFO. Nursing rooms are private and lockable and have comfortable seating and power outlets. You’ll find nursing rooms airside in Terminals 1, 2, and 3, with only Terminal 2 providing a landside option. Cloud of Good at SFO is an establishment that offers car seats and strollers for rent. They have three locations at SFO, one in each terminal. SFO has children play areas with interactive exploration areas for the older kids. You’ll find the play area around Gates 22, 54A, 58B, 87A, and 62.

  • Does San Francisco International Airport offer accessible services?

    Yes, SFO is a fully accessible airport. PRM will quickly get through the terminals, with ramps and elevators providing barrier-free access. PRM will also get accessible restrooms, reserved parking spots, dedicated seating, fast track services, and wheelchair assistance from their airlines. Low vision passengers coming through SFO have tactile guide paths, braille-coded elevator buttons, and Aira services to guide them through the airport. SFO has also provided TDD telephones and visual paging for hard-of-hearing passengers.

  • What are the transport options from San Francisco International Airport?

    Trains are the quickest means of getting downtown, and SFO is served by the San Francisco BART, which you can take from the SFO station at the Departures level of the International Terminal. You can also take the BART and connect to CalTrain commuter train services that serve the larger San Francisco area and San Jose. SamTrans provides bus services between SFO and downtown San Francisco. They have three bus routes serving SFO, and you can board these buses from the baggage claim level of Terminals 2 and 3 and level 1 of Courtyard A in the International Terminal.

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

    In the last 3 days, the lowest price for a flight from St. Louis to San Francisco was $89 for a one-way ticket and $188 for a round-trip.

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

    No

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to San Francisco?

    Alaska Airlines, American Airlines, and Hawaiian Airlines offer inflight Wi-Fi service on the St. Louis to San Francisco flight route.

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

    The Airbus A319 is the aircraft model that flies most regularly on the St. Louis to San Francisco flight route.

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

    Star Alliance is the only airline alliance operating flights between St. Louis and San Francisco.

  • On which days can I fly direct from St. Louis to San Francisco?

    There are nonstop flights from St. Louis to San Francisco on a daily basis.

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

    The two airlines most popular with KAYAK users for flights from St. Louis to San Francisco are Southwest and Delta. With an average price for the route of $420 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 $352 and an overall rating of 8.0.

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

    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 Francisco.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Francisco 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 Francisco?

    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 Francisco with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and SFO 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 Francisco?

    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 Francisco from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from St. Louis to San Francisco

  • Looking for a cheap flight? 25% of our users found flights on this route for $214 or less one-way and $480 or less round-trip.
  • St. Louis Lambert International Airport (STL) has two terminals and five concourses. The airport has provided a free shuttle for inter-terminal transportation that runs every 8-12min.
  • STL welcomes cats, dogs, and all pets. The airport has provided six pet relief areas, including indoors and outdoors. The indoor locations are after security, while the outdoor locations are outside Terminal 2 and the upper west side of Terminal 1.
  • American Airlines is the only airline with a lounge at STL. You must pay at the door and show your flight ticket to access this lounge. The AA lounge is airside between Concourses B and C.
  • US Bank has a full-service branch at STL. The bank offers banking and currency exchange services, and the bank is on the lower level of Terminal 1.
  • Around 920 kg of carbon is emitted on flights from St. Louis to San Francisco. You can fly more sustainably with Frontier Airlines, which offers flights that emit 45% less carbon per passenger.

Prefer to fly direct from St. Louis to San Francisco?

Find which airlines fly direct from Lambert-St Louis Airport to San Francisco Airport, which days they fly and book direct flights.

Direct departures

Lambert-St Louis to San Francisco

Monday

Air New Zealand, Asiana Airlines, Southwest, +1 more

Air New Zealand, Asiana Airlines, +2 more

Tuesday

Air New Zealand, Asiana Airlines, Southwest, +1 more

Air New Zealand, Asiana Airlines, +2 more

Wednesday

Air New Zealand, Asiana Airlines, Southwest, +1 more

Air New Zealand, Asiana Airlines, +2 more

Thursday

Air New Zealand, Asiana Airlines, Southwest, +1 more

Air New Zealand, Asiana Airlines, +2 more

Friday

Air New Zealand, Asiana Airlines, Southwest, +1 more

Air New Zealand, Asiana Airlines, +2 more

Saturday

Air New Zealand, Asiana Airlines, Southwest, +1 more

Air New Zealand, Asiana Airlines, +2 more

Sunday

Air New Zealand, Asiana Airlines, Southwest, +1 more

Air New Zealand, Asiana Airlines, +2 more

See more direct flights

Direct returns

San Francisco to Lambert-St Louis

Monday

Air New Zealand, Asiana Airlines, Emirates, +2 more

Air New Zealand, Asiana Airlines, +3 more

Tuesday

Air New Zealand, Southwest, United Airlines

Air New Zealand, Southwest, +1 more

Wednesday

Air New Zealand, Asiana Airlines, Emirates, +2 more

Air New Zealand, Asiana Airlines, +3 more

Thursday

Air New Zealand, Asiana Airlines, Emirates, +2 more

Air New Zealand, Asiana Airlines, +3 more

Friday

Air New Zealand, Asiana Airlines, Emirates, +2 more

Air New Zealand, Asiana Airlines, +3 more

Saturday

Air New Zealand, Southwest, United Airlines

Air New Zealand, Southwest, +1 more

Sunday

Air New Zealand, Emirates, Southwest, +2 more

Air New Zealand, Emirates, +3 more

See more direct flights
See more direct flights

Top 5 airlines serving from St. Louis to San Francisco

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to San Francisco. 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 Francisco? 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 4294 reviews
8.2Boarding
8.0Comfort
7.1Food
7.6Entertainment
8.6Crew
Airline reviews

It was a perfect flight in all aspects! Both legs!

10.0 ExcellentAnonymous, Apr 2025LGB - SMF
Read more Southwest reviews

It was a perfect flight in all aspects! Both legs!

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

Great experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

Very good. Sad to learn Southwest is going start to charge for bags

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Fine, but how to board on SW versus othrr airlines, is just lame. Goood staff though and all was solid otherwise.

Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a not a great airport.

Was as expected. Crowed planes. Too many carryons delaying takeoff. But the ride only took an hour and saved me a lot of time SFO is a hell hole of an airport. It is the new LaGuardia. Everything Cobbled together. Security gates closed. Terri directional signage

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Seats are much much more comfortable than United, which is what I usually fly

If I pay extra for "comfort+" I expect leg room where I can stretch my legs. I was seated with an attendant's seat blocking my feet. Knee space was fine but my feet had less room than the non-"comfort+" seats. Also, don't go cheap on food when you have flights of 3+ hours. It's insulting.

Only one side of the heafphone jack work. Crew was friendly and helpful.

Great. Flight departed early and arrived early. Deplaning and baggage claim ww were quick.

They separated our seats and moved us to the back of the plane. Hundreds of dollars and thousands of miles used and this was my platinum member experience.

AC barely worked on a 50 minute flight. It was very warm the whole flight. Flight was very bumpy and hard landing.

Got on the plane and then needed to deboard the plane because they didn’t have any pilots?

The flight was canceled two hours before departure, it took over five hours to rebook us on another flight.

Rough day of travel all the way around. Wrong info given to us multiple times and mistakes in their booking making our trip 10 hours longer than planned. I’m bummed because I fly Delta all the time and love them. Mistakes happen. Just bummed that this was a rare trip our whole family was traveling together.

A bit rush for transit. Food and entertainment are not available

The gate was too far away for the connecting flight

Generally good. The aisles have gotten narrower which can slow down boarding. Flight crew was great! Healthier complimentary snacks would be appreciated. Due to earthquake in San Francisco we had to circle in air space for a bit but then had a smooth landing. I laud the flight crew for their patience ;)

headphone jack didnt work for the first flight and not much variety

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

For the most part united was a good experience, how ever when they came by with the snacks and water, they completely passed by my wife and I. As we were in separate rows. On a 5 hr flight we were not offered water

Fantastic crew. Flight was delayed at last minute but we were given updates every 20 minutes and the crew was so friendly and considerate. I miss the touch screens on the back of the seats, wish they would bring that back though.

Beijing PEK to SFO. I had an economy seat on this flight. The seat comfort was acceptable. My main complaint is with the FA’s lack of personality and absence from servicing the plane, specifically restroom care (I wish I could share a pic of the restroom that I captured) and care of travelers—drink cart/availability of drinks. I'm amazed at the level of service on other International travel where a passenger is most often appreciated.

Awful. Worst airline I have ever been on. Crew were among the rudest people I have ever dealt with. United staff members were rude and disrespectful. My flight was delayed, causing me to miss a connecting flight. I understand things happen, but when staff start lying about what actually happened, that is when I have an issue. Just be honest, really it isn’t that hard. I’m being very honest with this review and I don’t find this difficult what so ever. In fact, because of United Airlines, my Christmas holiday was off to a really rocky start. As someone who has traveled across the world, it has only been United that I have had a truly awful experience.

Good flight. On time. Boarding and seating was easy. Crew were really friendly, yet professional. Bathroom (by cockpit) was small but serviceable. Some the seats were showing some notable wear & tear, but were comfy. Very happy UA customer. TY! 🤛🏽💗

One bottle of water and a package of cookies for comfort plus. We had to literally beg a flight attendant for an extra bottle of water later in the flight due to feeling dehydrated.

Flight boarded from Gate 39 at OGG, the farthest gate in the terminal. There were no Hawaiian themed amenities for the flight. The first class service was mediocre at best; I received not special welcome or recognition as an executive platinum member of American Advantage program. The flight attendants were more concerned with their cell phones than saying "thank you" to the passengers as we disembarked. Fortunately, the flight arrived at LAX a few minutes early.

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

Bigger seats. Board back to front! Disembark front to back!

Extraordinary service in business class, and very good breakfast and snacks. A really lovely flight.

This flight didn’t happen because AA agents didn’t let us board the flight

Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs

Plane was pretty clean, staff was friendly and helpful, flight left about on time arrived early. Took a long time to board and get off the plane - carry on items didn't have enough room so people had to move all around to find places.

The service and food needs to improve to catch up with other international flights

Would have been good to have a meal since it was a 5.5 hour flight

The reps working at the airport counter were dumber than a second coat of paint.

My costume jewelry was stolen out of my bag. Got to airport and my bag weighed 45 pounds- 5 pounds over cost me $100 Long lines in tier one. No entertainment No WiFi no free drinks or snacks

Not very good. Paid in excess of $400 for assigned seating for my family and that was not provided. I want that money back.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

I’ve never traveled on Frontier before. If you want basic, no frills, friendly service at great prices then give them a fly!

Cancelled and declined to find alternatives Earlier flight is 2 days later Sent the cancellation notification very late, wish I knew earlier would have stayed to watch the Miami open final game Very disappointing service

The worst flight of my life. Never will I fly frontier again

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

Information on your arrival and departure airports

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